KODEN RADAR 3210&3220

L rcDENSERVICE MANUAL

MARINE RADAR

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PRECAIITIONS

1. HIGH VOLTAGE WARNING

At severa l po ints in the scanner uni t and d lsp lay CRT mount of theradar , the re a re h igh vo l tages enough to k i11 a person coming in todi rect contact wi th thern. Al though the equlpment 1s designed toavoid danger in ord inary operat ion, care should be taken dur ing thema in tenance works ins ide the un i t s . Turn o f f the sh ip rs ma in sw iLchwhen checking the c i rcu i ts or replac ing components. Even af ter theradar i s sw i t ched o f f , some capac i to rs may take severa l m inu tes Lod ischarge . Be fo re touch ing the magne t ron and /o r CRT HV c i rcu i t s ,make su re to g round the capac i to rs w i th a c l i p co rd o r the 1 lke .

2. MICROWAVE HAZARI)

T a k e c a r e t o a v o i d p o s s i b l e h a r m f u l e f f e c t s o f m i - c r o w a v e r a d i a t i o nf r o m t h e r a d a r t o a h u m a n b o d y . T h e e y e s a r e p a r t i c u l a r l y v a l n e r -a b l e t o m i c r o w a v e . N e v e r l o o k d i r e c t l y i n t o a n o p e n w a v e g u i d e r a d i -a t i n g t h e p o w e r . R a d a r a n d o t h e r R . F . r a d i a t i o n s c a n u p s e t s o m ec a r d i a c p a c e m a k e r s . I f a u s e r o f c a r d i a c p a c e m a k e r s u s p e c t s a m u 1 -func t ion , tu rn o f f the equ ipment and leave the v ic in i ty o f Lhe an-tenna i rnmed ia te ly . Whenever i t i s necessary to work on the scannerun i t , a lways se t the cont ro ls to STANDBY or RADAR OFF.

3. FI]SES

B e f o r e s t a r t i n g t h e r a d a r , c o n f i r m t h a t p r o p e r l y r a L e d m a i n f u s e sa c c o r d i n g t o t h e s h i p ' s m a i n v o l t a g e a r e u s e d . T h e r a t e d m a l n a n dother fuses fo r MD-3210 and MD-3220 are l i s ted be low.

. \ :

(a ) Ma in fuse

(b ) CRT HV (See No te )

(c ) Modu la to r HV

(d) An tenna d r i vemoto r

4. MAGNETRON PREHEATING

Ship's Main

T2 VDC24 VDC

Either

E i the r

E i the r

I'tD-32r0

1 5 A8 A1 Al- tl

0 . 3 A? 1 < AJ . L J N

tfi-3220

N o t a p p l i c a b l e1 0 A

i A

0 . 5 A

3 . 1 5 A

B e f o r e t r a n s m i t t i n g t h e m i c r o w a v e f o r t h e f i r s t t r a n s m i s s i o n a f t e ri n s t a l l a t l o n , o r a f t e r 2 m o n t h s o r o v e r p a u s e o f o p e r a t i o n , p r e h e a tthe magnet ron more than 30 minu tes by keep ing the radar in STANDBYc o n d i t i o n .

Note : CRT HV fuse is no t used fo r the un i t o f ser ia l numbers shownbe1ow, equ ipped w i th power supp ly I ' {D-32I0 /3220-6000M3.

MD-3210: No. 2100659 and thereaf terMD-3220: No. 3220336 and thereaf ter

MD-32I0/ 3220 Serv ice Manual-Ol

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Marine Radar MD-3210 / SZZOINDEX

Page

PRECAUT IONS1. GENERAL l - i

1 . 1 M a j o r P e r f o r m a n c e s1 . 1 . 1 A n L e n n a u n i t I - 21 . I . 2 D i s p l a y u n i t I - 2

1 . 1 . 3 P o w e r s u p p l y 1 - 3

1 . 2 C o m p o s i t i o nr . 2 . 1 M D - 3 2 r 0 / 3 2 2 0 . . . . . . . . . . . . . . r - 4I . 2 . 2 O p t i o n a l e q u i p m e n t 1 - 5

1 . 3 S y s t e m C o n f i g u r a t i o n o f M D - 3 2 I 0 / 3 2 2 0 . . . . 1 - 6

I .4 In te rconnecL ion o f MD-32 I013220 I -7

1 . 5 M o d i f i c a t i o n o f S p e c l f i c a t i o n s1 . 5 . 1 J u m p e r p i n s e t t i n g 1 - 8

L . 5 . 2 D I P s w i t c h s e t t i n g 1 - B

2. FUNCTION OF EACH UNIT2 . I A n t e n n a U n i t . . . . 2 - I

2 . f . 1 A e r i a 1 2 - I

2 , I , 2 A n t e n n a n o t o r 2 - 2

2 . I . 3 S H F a n d A Z I g e n e r a t o r s . , . . 2 - 2

2 . I . 4 T r a n s m i t t i n g s e c t i o n 2 - 3

2 . I . 5 D u p l e x i n g a s s e m b l y 2 - 5

2 . I . 6 R e c e i v i n g s e c t j - o n 2 - 5

2 . 2 D l s p l a y U n i t 2 - l

2 .2 .1 Power supply (MD-32 10/3220-6000 ) . . 2-7

2 . 2 . 2 L o g i c s e c t i o n . . . . . 2 - 9( i ) L o g i c u p p e r ( M D - 3 2 1 0 - 7 0 0 0 ) . . . . . . 2 - 9(2 ) Log ic lower (MD-3210-7100) 2 -L3

2 . 2 . 3 C o n t r o l p a n e l ( M D - 3 2 1 0 - 7 2 0 0 ) . . . . . . . . 2 - I 8

3. ADJUST]'{ENT3 . 1 L o c a t i o n o f C o n t r o l s . . . . . . . . . . . . . . 3 - i

3 .2 Ad jus t rnen t A f te r Ins ta l l a l i on 3 - l

3 . 2 . 1 T u n i n g 3 - 1

3 , 2 . 2 P r e s e t g a i n ( n o i s e 1 e v e 1 ) . . . . . . . . . . . . . 3 - 2

3 . 2 . 3 S T C , . . . . . . . 3 - 2

3 . 2 . 4 T r i - g g e r d e l a y . . . . . 3 - z

3 . 2 . 5 S H F a n d b e a r i n g . . . . . . . . . . . . . . . . 3 - 33 .3 Ad jus tment o f An tenna Un i t 3 -3

3 .4 Ad jus t rnen t o f D isp lay3 . 4 . 1 P o w e r s u p p l y ( M D - 3 2 L 0 / 3 2 2 0 - 6 0 0 0 ) . . . . . . 3 - 3

3 . 4 . 2 L o g i c u p p e r ( M D - 3 2 1 0 - 7 0 0 0 ) 3 - 53 . 4 . 3 l o g i c l o w e r ( M D - 3 2 i 0 - 7 1 0 0 ) . . . . . . . . . . . . . . . . 3 - 5

3 .4 .4 CRT un i t (P \^ /D- i050A/PWD-1051A) 3 -6

1 -

4. WAVEFORMS4 . I A n t e n n a U n i t

4 . t . 1 M R T - 1 3 3 ( M D - 3 2 1 0 ) . . . . . . . . . . . .4 . L . 2 m T - 1 3 4 ( M D - 3 2 2 0 )

4 . 2 D i s p l a y u n i t4 . 2 . 1 P o w e r s u p p l y4 . 2 . 2 L o g i c u p p e r4 . 2 . 3 L o g i c l o w e r

5. REPLACEMENT OF MAJOR COMPONENTS5 . 1 A n t e n n a u n i t

5 . 1 . 1 D i s m o u n t i n g t r a n s m i t l e r / r e c e i v e r ( T R ) u n i t5 . I . 2 R e p l a c e m e n t o f T R u n i t c o m p o n e n t s5 . 1 . 3 R e p l a c e m e n t o f S C O N . . . . . . . . . . . . . . . .5 . 1 . 4 R e p l a c e m e n t o f m o t o r b r u s h5 . 1 . 5 R e p l a c e m e n t o f m o t o r

5 . 2 D i s p l a y u n l t5 . 2 . 1 C o n t r o l p a n e l ( M D - 3 2 1 0 - 7 2 0 0 ) . .5 . 2 . 2 L o g i c u p p e r ( M D - 3 2 1 0 - 7 0 0 0 ) a n d

log ic lower (MD-3210-7100)5 . 2 . 3 P o w e r s u p p l y ( M D - 3 2 1 0 1 3 2 2 0 - 6 0 0 0 ) . .5 . 2 . 4 C R T u n i t

6. TROUBLESHOOTING6. I T roub leshoo t ing by Observ ing D isp lay6 .2 Opera t ion Con t ro l T roub leshoo t ing . . . .6 . 3 A n t e n n a T r o u b l e s h o o t i n g . . . . . . . . . . . . . . .

7 . DIAGRAMS7 . L C i r c u i t D i a g r a m . . . . . . . . . . . .7 ,2 Draw ings fo r pa r ts loca t ion

8. PARTS LIST8 . 1 E l e c t r i c a l P a r t s

8 . 1 . 1 A n r e n n a u n i r M R T - 1 3 3 ( 1 0 k W )8 . I . 2 A n t e n n a u n i t M R T - 1 3 4 ( 2 5 k W )8 . 1 . 3 D i _ s p l a y u n i r M R D - 6 2 / M R D - 6 8 . . . . . . . . . . .

8 . 2 M e c h a n i c a l P a r t s8 . 2 . 1 A n t e n n a u n i t M R T - 1 3 3 ( 1 0 k W ) . . o .8 .2 .2 An lenna un i r I '&T- r34 Q5 kW) . . . .8 .2 .3 D isp lay un i r MRD-62 /MRO-OS

8 . 3 E x p l o d e d V i e w8 . 3 . 1 A n t e n n a u n i t8 . 3 . 2 D i s p l a y u n i t

: f J + J f * * * * : f * : f *

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J _ L

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J - +

5 - 6

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5-86 - 16 - 16-46 - 7

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8-18-8

8 - 1 8

8-288-3 18-32

8-3s8-42

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1 .

SERVICE MANUALfor

MARINE RADAR MD_3210 / 3220

GENERAL

K o d e n M D - 3 2 L 0 / 3 2 2 0 s e r i e s i s a h i g h l y e f f i c i e n t m a r i n e r a d a r w h i c h c o n f o r mL h e I M O s t a n d a r d s L o b e u s e d f o r a p r i m a r y r a d a r o f f i s h i n g b o a l , w o r k b o a l ,a n d o t h e r v e s s e l l e s s t h a n 1 0 , 0 0 0 g r o s s w e i g h t L o n s . T h e s y s l e m c o n s i s t s o fo n l y t w o u n i t s , i . e . t h e a n L e n n a a n d d i s p l a y . E x c e p l f o r m a g n e t r o n a n d C R T ,a l l L h e a c t i v e c o m p o n e n l s a r e s o l i d s t a t e w h i c h m a i n t a i n h i g h r e l i a b i l i L ya n d m a i n L e n a b i l i t v .

T h e r a d a r d i s p l a y u s e s a 2 0 - i n c h d i a g o n a l h i g h r e s o l u t i o n g r e e n m o n o c h r o m eC R T . I t e m p l o y s X - Y c o o r d i n a t e s t o d i g i t a l l y p r o c e s s t h e r a d a r i n f o r m a t i o na n d d i q n l a v L h e i m a g e w i t h a b u i l t - i n m i c r o p r o c e s s o r . T h e r a d a r s c r e e n i sd i v l d e d i n t o n u m b e r o f p i c t u r e e l e m e n l s , s o c a 1 l e d p i x e l s . E a c h p i x e l i sa s s i g n e d w i l h X - Y c o o r d i n a t e s w h i c h c o r r e s p o n d s t o L h e m e m o r y a d d r e s s . T h er a d a r r e t u r n e c h o e s i n p o l a r c o o r d i n a t e s f o r e v e r y p u l s e L r a n s m i s s i o n a r ec o n v e r L e d i n l o X - Y c o o r d i n a t e s i - n a c c o r d a n c e w i L h L h e d i s t a n c e a n d a z i m u t h .T h e d i s t a n c e i s o b l a i n e d f r o m t h e t i m e d u r a l i o n b e t w e e n t r a n s m i s s i o n a n dr e c e p l l o n o f p u l s e , w h i l e t h e a z i m u t h i s g i v e n f r o m t h e a n t e n n a u n i l . T h ec o o r d i n a t e s c o n v e r t e d d a l a i s s t o r e d i n L o m e m o r y a n d L h e n r e a d o u l t o d i s -p l a y L h e i r n a g e i n a r a s t e r s c a n m e l h o d a l l o w i n g t h e p i c L u r e t o b e m o n i t o r e db y p 1 u r a 1 p e r s o n s u n d e r d a y l i g h t c o n d i L i o n w i t h o u t v i e w i n g h o o d . A c c o r d i n gt o t h e L r a n s r n i t L i n g p o w e r , s y s t e m i s c l a s s i f i e d i n t o L w o m o d e l s a s b e 1 o w .

ar^ ' l

MD-321 0MD-3220

Antenna unit

10 kl,J25 kW

A n t e n n a u n i L c o n s j - s l s o f a 6 - f o o l s l o L t e d a r r a y a e r i a l , a n t e n n a d r l v eu n i l , a n d t r a n s c e i v e r u n l t . T h e s l o t t e d a r r a y a e r i a l i s c o n t a i n e d i n ar e i n f o r c e d p l a s t i c c y l i n d r i c a l c a s e , p r o v i d i n g s m o o t h a n f e n n a r o t a t i o nin a w ind load o f 100 knots . The an tenna un i t has been des igned as\ ' , ' a L e r - L i g h t , v i b r a t i o n - p r o o f , a n d w e a t h e r - r e s l s t a n t c o n s t r u c t i o n . T h ed r i v e u n i l a n d L r a n s c e i v e r u n i t a r e m o u n L e d i n a r i g i d a l u r n i n u m c a s t a n -L e n n a b a s e . T h e L r a n s c e i v e r u n i L i s a m o d u l e L y p e w h l c h e n a b l e s s p e e d ya n d e a s v m a i n L e n a n c e .

Display uni t

T h e r a d a r p i c t u r e i s d i s p l a y e d o n a 2 O - i n c h d i a g o n a l h i g h r e s o l u t i o n C R Tw i l h a n e f f e c L i v e d i a m e L e r o f 1 2 i n c h e s ( 2 7 0 m m ) . T h e g r e e n m o n o - c o l o rr a s t e r s c a n p i c L u r e p r e s e n t s c r i s p a n d c l e a r i r n a g e u n d e r b r i g h t d a y l i g h tc o n d i t i o n . T h e d i s p l a y u n i t m a i n l y c o n s i s l s o f C R T m o u n t , l o g i c c i r c u i l ,c o n t r o l , a n d p o w e r s u p p l y s e c t i o n s , a l l a s s e m b l e d L o g e t h e r i n a d r i p -p r o o f a l u m i n u m c a s e . E a c h s e c t i o n i s o f a r n o d u l e t y p e p r o v i d i n g e a s ym a l n L e n a n c e c a p a b i l i t y . I n a d d i t i o n t o L h e r a d a r p r e s e n t a L i o n , t h e^ ^ - i + . i ̂ - . i n g d a L a f r o m a n o n b o a r d n a v i g a t i o n a l e q u i p m e n l s u c h a s G P S , a n dP U > a L r U l l r .

L o c a n C c a n b e d i g i l a l l y d i s p l a y e d o n L h e s c r e e n .

MD-32L0 / 3220 Serv ice Manual-Ol 1 - 1

1.1 Major Per fo rmances

1 . 1 . 1 A n t e n n a u n i t

( 1 ) A n t e n n a s y s t e m

A e r i a l

T r a n s c e i v e r

( 2 ) A e r i a l

( 3 ) A n t e n n a r o t a t i o n

(4) Iv la ln beam wid th

( 5 ) S i d e l o b e 1 e v e 1

( 6 ) T r a n s m i l t i n g f r e q u e n c y

( 7 ) P e a k p o w e r o u t p u t

( B ) T y p e o f e n i s s i o n

( 9 ) S p u r i o u s e r n i s s i o n

( 1 0 ) 0 c c u p i e d b a n d w i d t h

( 1 1 ) P u l s e w i d t h / r e p e t i t i o n r a t e

( 1 2 )

( 1 3 )

SM 1M2L

IF cen te r f requency

IF bandwidth

( 1 4 ) R e c e i v e r f r o n t - e n d m o d u l e

( 1 5 ) M o d u l a t o r

( 1 6 ) E n v i r o n m e n t a l c o n d i t i o n s

Ambient tempera tureR e l a t i v e h u m i d i t yW i n d v e l o c i t v

I . L . 2 D i s p l a y u n i t

( 1 ) D i s p l a y s y s t e m

( 2 ) E f f e c t i v e d i a m e t e r

( 3 ) R a n g e s c a l e

MRD-62 (MD-3210)MRD-68 (MD-3 220)

MRA-37

MRT-133 (MD-3210)MRT-134 (MD-3220)

6 - foo t s lo t ted a r ray

24 rpm

H o r l z o n L a T : 1 . 2 " , V e r t i c a l : 2 2 "

Less than -23 dB f rom the maln beam

9 ,4rO t30 MHz

10 k\,. / (MRT-I33)25 kW (MRT-134)

PON

Less than -40 dB from the main beamof the fundamenta l f requency ou tpuL

With in 110 NIHz

0 . 0 8 U s e c , 2 , 0 0 0 p p s0 . 3 U s e c , 1 , 5 0 0 p p s0 . 6 u s e c , 1 , 0 0 0 p p sI . 2 u s e c , 5 0 0 p p s ( U n f - l 3 3 / 1 3 4 )

4 3 0 p p s ( M R T - 1 3 4 a L 9 6 n m r a n o e )

60 Yfri,z

15 N IHz (S , M i )3 Yfr lz (V12, L)

M I C ( M i c r o r v a v e I n L e g r a L e d C i r c u i L )

S o l i d - s t a t e 1 1 n e L y p e p u l s e r

- 2 5 0 C r o 7 0 ' C957" at 35oC1 0 0 k n o t s ( 5 1 . 5 m / s e c ) , r e l a t i v e

20- inch

MRD_62

d iagona l g reen monochrome CRT

( I 'D-32 10 )MRD_68

270

L / 4 , r / 2 , 3 / 4 ,r / 4 , r / 2 , 3 / 4 ,

1 . 5 , 3 , 6 , 1 2 ,1 . 5 , 3 , 6 , 1 2 ,

24 , 48 , 72 nm24 , 48 , 96 nm

1 tL - Z - MD-32 I0 / 3220 Serv ice Manua l -O l

( 4 ) R a n g e r i n g i n t e r v a l

M R D - 6 2 ( M D - 3 2 1 0 ) r / 1 6 , r / 8 , r / 8 , r / 4 , r / 2 , 1 , 2 , 4 , 8 , 1 2 n mM R D - 6 8 ( M D - 3 2 2 0 ) L / 1 6 , r / 8 , r / 8 , L / 4 , r / 2 , 1 , 2 , 4 , B , 1 6 n m

(5) M in . de tec t ion range Be t te r than 23 m on I /4 nm range

(6 ) Range reso lu t ion Be t te r than 20 m

(7) VRM accuracy 50 m o r 17 . o f the se lec ted range , wh icheveris the greater

( S ) E B L A c c u r a c y 1 o , i n 0 . 2 " s t e p s r o t a t i o n

( 9 ) B e a r i n g r e s o l u t i o n 1 . 8 o

( 10 ) Bear ing sca l

. M a r k i n g 1 o , 5 o , 1 0 " s t e p s ( 0 ' t o 3 5 9 ' )Read-ou t 10o s teps

( l l ) E n v i r o n m e n t a l c o n d i t i o n s

Tempera tu re -15"C to 55oCRelat ive humidi ty 957" at 35"C

( I2 ) Ro ta ry sw i t ch FUNCTION (S 'BY, SP, LP , PM)

(13) Ro ta ry encoder VRM, EBL

(14) Opera t ioa l con t ro ls TUNE, GAIN, STC, FTC, V IDEO BRILL , MARKER BRILL ,PLOT BRILL, NUMERIC BRILL, and t rack bal l

( 15 ) Membrane swi tch EBL , PO\, , /ER , RANGE, DIM, HM, RINGS, MODE (HU, CU,NU, TM) , GYRO, SPD, TR, EXP , BEARING, TRAIL (OFF ,1 5 , 3 0 s e c , 1 , 3 , 6 , 1 2 m i n ) , A L A R M ( O F F , 9 0 o ,1 8 0 o , 3 6 0 o ) , S E T ( G Y R O , A L A R M ) , O F F C T R , F L T E B L ,VECTOR, TRU/REL, DELETE, ALL CLR , ENTER , SYMBOL( o , [ ] , A , V , O , * )

( 16) Presentat ion mode Head-upNor th -up (op t ion , see No te 1 )Course-up (op t ion , see No te 1 )T rue mot ion (op t ion , see No te 1 )

No te 1 : Nor th -up , course-up , and t rue mot ion modes requ i re bu i l t - i n t ype op-t iona l gy ro / Iog in te r face KSA-08 .

1 .1 .3 Power supp ly

(1 ) Power requ i rements

MD-3210 1 i ro 18 VDC or 2L Lo 36 VDC (See Nore 2 )Note 2; l '1D*3210 opera les on 24lZZ VDC mains as the

s tandard . For opera t ion on 12 VDC, changetaps of the power t ransformer in the power

MD-3220 24 VDC supplv MD-32 r0/ 3220-6000 '

(2 ) Power consumpt ion

MD-32 10MD-3220

140 l{ at 24 VDC160 W

MD-32I0/ 3220 Serv ice Manual-O1 1-3

L.2 Composit ion

L .2.1 MD-32IO/3220

( 1 ) S t a n d a r d e q u i p r n e n t l i s t

( 2 ) S p a r e p a r t s l 1 s t

N o . Descriuption Rating Renarks Weight/Length Q ' t y

1

2

4

5

6

-,

8

9

A e r i a l

T r a n s c e i v e r u n i t

D s l p l a y u n i t

V i n y l c o v e r

C o n n e c t i n g c a b l e

Power cab le

S p a r e p a r t s

I n s t a l l a t i o nm a t e r i a l s

Opera t ion manua l

MRA_37

MRT_ 1 33MRT_ 134

MRD_62MRD_68

9CD-3292C

CW_89

6- foo t span

For MD-3210For MD-322O

For MD-3210For MD-3220

For d isp lay un i t

250V-DPY2.O8 . 5 m m 0 , w i t h o n eend connec to r

See spare par ts l i s t

See ins ta l l a t ionmaLer ia l l i s t

1 5

5

B k g ( 1 7 . 6 l b )

7 7 k g ( 3 7 . s l b )2 0 k g ( 4 4 . o 1 b )

3 7 k g ( 8 1 . 4 1 b )3 7 k g ( 8 1 . 4 1 b )

( 4 9 . 5 f r )

( 1 6 . s f r )

1

11

11

1

t

1

1

1

S C L

a n { -

J C L

1

No. Description Rating UseQ ' t yPID-3210 | m4220

1

2

4-J

6-l

Fuse , ma in

Fuse , ma in

Fuse, MOD HV

Fuse, CRT HV

Fuse , moto r

Lamp

Molo r b rush

l s A ( F - 7 1 6 s )

8 A ( F - 7 1 6 s )1 0 A ( F - 7 1 6 5 )

0 . 3 A ( F - 7 1 6 5 )0 . s A ( F - 7 1 6 s )

1 A (F-7r42)

3 . 1 s A ( T L C 3 . 1 s A )

KCDS_05

242125209

F o r 1 2 V D C I N o t a p p l i c a b l e

For 24 VDC I No t app l i cab leNot app l j - cab1e

lFor 24 VDC

For 10 kW TX I no t app l i cab leNot app l i cab le I

Fo r 25 kW TX

For MD-32I0/3220, see Note

For antenna, lulD-32I0/ 3220

For con t ro l pane l , MD-32 I0 /3220

For antenna motor , MD-32I0/3220

2

Z

2

22

z

L

L

I se t

Note CRT HV fuse is not appl ied for the ser ia l numbers shown be1ow,equipped wirh power supply I ' lD-32I0/3220-6000M3.

MD-3210 : No . 2100659 and rherea f re rVID-3220: No . 3220336 and rhereafrer

L-4 MD-32 I0 / 3220 Serv ice Manua l -O1

-

( 3 ) I n s t a l l a t i o n m a t e r i a l l i s t

I .2.2 Optional equipment

N o . Description Rating Use Q ' t y

I

z

J

Coach screwPla in washerSpr ing washer

Hexagona l bo l tP la in washerS p r i n g w a s h e rN U L

A n t i - c o r r o s i o nw a s h e r

A n t i - c o r r o s i o nwasher

CW9 x 50SW1 OSSWlOS

BLz x 55U2\]IzUsh/12uN 12U

30 a

50

For d isp lay un i t

For antenna uni t

For an tenna un i t

For an tenna un i t

666

4

B4B

4

4

N o . Descript ion Rating Remarks Weight/Length

1

I

-)

4

5

G y r o / L o g i n t e r f a c e

Hood

Base

R e c t i f i e r

N a v i g a t o r c o n n e c t -ing cab le

KSA_OB

HD-1100

0 0 1 9 - r 2 r 9

PS-00s

CW-94

CW_i53A

cl,\I-155

B u i l t - i n t y p e

Bulkhead mount ing

Wi th BNC/6-p ln p lugs

Wi th 6 -p in p lugs

Wi th BNC/6-p in p lugs

k g ( 2 . 2 1 b )

8 k g ( 1 7 . 6 1 b )

5 m ( 1 6 . 5 f t )

5 m

5 m

MD-32I0/3220 Serv ice Manual-01 t \L - J

Antenna Unit

1 . 3 System Configuration of I'[D-3210 / ZZZO

AerialMRA-37 6-foot

Transceiverl'tRT-r33 (t'tD-3210)t"tRT-134 (lrD-3220)

Antenna cable9CD-3292A t09CD-32928 209CD-3292C 1s9CD-3292D 2L

mmm, s tandardt o 4 0 m

Displayl"{RD-62MRD-68

Unit(r'fD-32r0)(t'tD-3220)

FromN a v i g a L o r ( o p t i o n )

Rect i f ie r- - - - -r l

- -l ps-oos l- - 100/1L5/2oo/230 vAC, I

I r

-l

I Gyro-1og Interface

: - - -l *ro-ou f :::: -::: ff; '=il::i 'J_ - - Log s i gna ll - - - - ; - - t l t o 4 o v D C

( B u i l L i n t h e d i s p l a y u n i t )

Power cab lect.J-89

1l ro 18, 2t ro 36 VDC (MD-3210)24 VDC !tO7" (t{t-322o)

Dot ted l ines- - - show opt ion.

Model Antenna Unit Display Unit

Aerial Transceiver

I'lD-3210

t{D'-3220

MRA_37

I'[RA-37

MRT_133

l,tRT-134

I'[RD-62

I'{RD-68

1 - 6 MD-32 IO / 3220 Serv ice Manua l -O l

I.4 Interconnection of MD-321O/322O

ANTENNA IINIT

1}.b.-l r J----rr--!rl---4i 4 ' - " - l l l l I

SCANNER CONNECTION BOARD r--

Wire Co lo rVIOtff Lef tBRorrN tG r e e n I\Jh i reBTdCKPINKV i o l e th lh i te / gr ee nG r a yGREENBLT]EN o c o n n e c L i o nN o c o n n e c L i o n\ V h i r e / r e dYe 11o r iBrorvnC o a x . G N DRED0 r a n g eRedGRAYC o a x . G N D

S t e p t y p eG1 ' ro

BOLD: Th i ck w i reL i g h r : T h i n w i r e

' € p t , . ,'T.?ff(s coN)

xr . ,x lL) r [ r> I I( f _ | d

o ; ' f f i r

.rsn*: tSQ'E^l' | t * | |' O r u - t

$ n P'q{

Cable clamP

Antt lnt ra cable9CL)-- ) 292

DISPT-AY TJNIT

S i g n a lS h i e l d

I n s e r t w i r e e n d s l n t ot e r m i n a l s a n d f i x t h e mr v i L h a s c r e w d r i v e r .

KSA-Os-620014 Synchro

IR i g h t

I

Q l

s2q a

R 1R2coMGNDLOGlLOC2LOG3LOG4

Rect i f ie rP S - 0 0 5 ( o p t i o n )

L y p e G y r o Q r

s2q a

R 1

ru

C'M

G N D

Con tac t t ype l ogPho to -coup le rt y p e l o g

S e e p a r a . | . 5 . 2

f o r s e l t i n g D I P

s u i L c h L o s e l e c t

L y p e o f G y r o .

/i\( z + ,)<\1,

o rv D C ( M D - 3 2 r 0 )

! to7" ( l , tD-3220)

24 VDC S h i p ' s m a i n s100 / l 15 /200 /230 vAc

C W - 1 5 5 o r

MD-32I0/3220 Serv ice Manual-Ol L - 7

r . 4 Interconnection of MD-321O/ 3220

ANTENNA I.INIT

Cable c lamP

Wire Co lo rVIOI-ETBRCft'lNG r e e n\ {h i reBLACKPII{KV i o l e t

BOLD:I i o h t .

T h i c k w i r eT h i n w i r e

L C L L

I

l l h i t e l g reenG r a yGREE}IBLTIEN o c o n n e c L i o nN o c o n n e c L i o n\ V h i r e / r e dYe 11or , 'BrorvnC o a x . G N DRED0 r a n g eRedGRAYC o a x . G N D

S t e p t y p eG y r o

IR i g h t

Antr l r r r ra cable9Ct)-- t 292

DTSPI-AY TINIT

S i g n a lS h i e l d

Inse r t w l re ends i n tote rm ina l s and f i x t hemw i t h a s c r e w d r i v e r .

KSA-O5-6200I4 Synchro

S 1S 2q a

R 1n <

coM

G N D

LOGl

LOG2

LOG3

LOG4

t y p e G ; ' r o q r

S2JJ

R 1

ru

@ M

G N O

C o n t a c t t y p e 1 o gPho to -cou p le rt y p e 1 o g

S e e p a r a . I . 5 . 2f o r s e t t i n g D I Ps w i L c h t o s e l e c tr y p e o f G y r o .

e))<t)

( * - ) l l t o l B o r2 I L o 3 6 V D C ( M D - 3 2 1 0 )

24 VDC t10Z ( t ' tD -3220 )

S h i p ' s m a i n s100 / l r s / 200 /230 vAc

24 VDC

5,l-li' G;ffi, J-------r.:--!r-L--4i.l I ik -u; Ie , SCANNER C0NNECTION BOARD r--.FF (s coN)-lc

lI[-J ir gg' lt-) l l 'r) -]

r:rf-.r*.r. - l'o 3l* -g,_^ -= I

Fd,ffi ,-ff1*Y'*1

f?^;3u,;"i;;"@ E ffi [l];3.3;;,Tiir;

@a ffi [1]Power cablec\V-89

Rect i f ie rP S - 0 0 5 ( o p t i o n )

Cr i - 155

MD-32 I0 / 3220 Service Manual-0l t - 7

I .5 Modif icat ion of Speci f icat ions

1.5. I Jumper pin set t ing

f n o rder to se t opera t iona l cond i t i ons o f the un i t , f l ve jumper p ins a reprov ided on the log ic lower board (MD-3210-7100) . Func t ions and in i t i a lse t t i ng s ta tus o f those p ins a re l i s ted as fo l l ows :

JarperPin l lo. Function

I ni t ia lsettins Modification

JP1 Level of plot t ins image ll: 3rd and 4th lev-e i o f quant ized4- leve l v ideo s ig-na l are p lo t ted.

H: 0n1y the h ighest(4 th) leve l v ideos igna l is p lo t ted.

JP2 Select ion of t r igger OFF: Internal Olf : External

JP3 Composi t ion o f v ideo s ie-na l and marker i ines (EBL,VRM, SHF', and fixed rangemarker r ings)

EX0R: Video signalieve l becomes [1ow]where marker l inesr ide on .

lf0Rll: Video signaland marker I inesare superirnposed.

JP4 Status of output v ideo Ml{: Raw video PR0: Video signalprocessed on STC,FTC, and gain

JP5 Number of horizontai scan-n ing i ines

1,153: For 20- in CRT1,089: For 15- in CRT

1.5.2 DIP swi tch set t ing

Three DIP sw i tches , f rom SWl to SW3 are mounted on the log ic upper board(MD-3210-7000) in o rder Lo p reseL the operaL ion o f equ ipment . Func t ionsse t by those sw i tches and the i r s tandard se t t i ngs a re l i s ted be low.

SH1Elerent

lfo.Function

1I

2Input data

formatoN -rO N J

NMEA_0i83

OFF _-l KODEN-0N r 7r7

0N r NMEA-OFF J 0182

OIF 1 NoQlP r isp*t

34

Speed logpu lse ra t io

0N I 1000 N r

6Xp:1,. ', '200.fllrf J

0N -l 400OFF -J

OFF -l 500OFF I

5 Bearing data 0N: Ser ia l (Loran, GPS) QIP;: :P6sa1,le:I : (XSA-08)

6 Gyro data 0N: Connected for NU, CU, or TM 0IF::: :Not [611xsc[sfl

78

Gyro BOarra t io

0 N I 3 6 : 10 N r

OFF _1 90 :1O N - J

0 N I 1 8 0 : 1OFF' I

1 - B t" lD-32 IO/ 3220 Service Manual-O1

DIP sw i tch se t t i ng , con t inue

sHzElenent

l{o.Function

1 Range setting ON: ,u t 4 , B nm ser ies 0F8,1.,,,3.,,, 0,;,.,.12.,.qil:,:S,elle-$i23

Maximum range 0 N t 6 4 n mOFF I

OFF _1 NotOFF _J used

,0t+1" ,72;.,*,,O N r ' : :

0rr,;, .,96,;p.Qlif J

MD-3210 t4D-3220

4 EXP effect range 0N: Above 3 or 4 nm range A I I

q Trai l mode OFF: Cont inue a l l t racks0N;: : [ateSt: four: traCks

6 Tra i l sampl ing 0N: Every antenna rotat ion Q F.E, i,,,,.l.Q-t g. rva I s.,. s g- t,.,,h y .,.hp. -7 VRM unit 0N: km/hour Naut lcal mi le

8 Performance monitor l Ol l : Connected

sH3Elenent

lfo.Function

1 Not used.

,u Not used.

3 Speed data 0N: Ser ia l (Loran, GPS) ,,,P_aral,le 1.,.(K$4.:0S ):,.4 Off-center ing

mode0f!1 Mqve 213 radius to stern0[{,;,,,,M0ye..t0: :ant,.,p-o,in!,. Ui[.h,ilf.i,rl3,:,iadi,us, ,with,,,iurSoi',

5 Para l 1e lcurs0r

0N: Para l le l cursor and EBL are se lec t ive ly d isp lavedQ [I, ;,.,,0. 1.I y .,,E8,[-,., i .q,. d, i ! p 1 -a.y d d,. .,.

A Wavpoint 0N: D isp lay WP (waypoin t )

7 CRTs i z e

0N, 15" Note) MD-3210-7100 jumper pin JpS must be0F_{ii.,.,2(!.]: ' i set to 1,089 for 15" b. t,fSS for 20" CRT.

B Resett inetrue mot ion

di spl aycenter

0N: Sweep\'!P- tq

OIF::: :$weep:',,,,,,, ,-,-,coR-!Qf

0rrgrn returns scope center when travei led213 radius ahead.oi,igin,,' i' S' . : iet : ' :2rc "iadius,'of f :fism : ' Scope: ' : . :

MD-32 I0 / 3220 Serv ice Manua l -O1 r-9

2. FI]NCTION OF EACH T]NIT

2.L Antenna Unit

The an tenna un i t cons is ts o f the s lo t ted ar ray aer ia l , an tenna dr lve mecha-n i s m , t r a n s r n i t t e r , r e c e i v e r , a n d T / R s w i t c h i n g a s s e m b l y . T h e t r a n s m i t t e rc o n s i s t s o f t h e m a g n e t r o n a n d m o d u l a t o r c i r c u i t w i t h H T s u p p l y a n d t r i g g e ra m p l i f i e r . F i g . 2 . 1 i l l u s t r a t e s t h e b l o c k d i a g r a m o f t h e a n t e n n a u n i t , a n dT a b l e 2 . I l i s t s t h e c o m p o s i t i o n o f a n t e n n a u n i t .

F i g . 2 . IBlock Diagram ofAntenna Unit

Tab le 2 . I Composition of Antenna Unit

N o . Description FunctionPart No.

t[RT-133 I'[RT-134

L

1

5

6'7

B

9

A e r i a l

SHF gener -a t o r

Motor w i thn i n i n n

Modula tor

Magnet ron

C i r c u l a t o r

Limiter

MIC

Log IF amp

R F e m i s s i o n a n d r e c e p -t i o n^ r I r r 'S h i p ' s h e a d i n g f l a s hg e n e r a t i o n

Aera i l ro ta t ion andA Z I p u l s e g e n e r a t i o n

H T s u p p l y a n d p u l s em o d u l a t i o n

X - b a n d R F o s c i l l a t i o n

R F s i g a l d u p l e x i n g

P r o t e c t i o n o f r e c e i v e r

R F a m p l i f i c a t i o n a n df r e q u e n c y c o n v e r s i o n

L o g a r i t h m i c I F a m p l i f i -c -a t ion and de tec t ion

MRA-37( 6 - f r )

FRS-901-3

23G53203

239U522368( 10 k1,{)

MSF1 4258

FCX6B

NJS6930

NJT1946

239U52512

MRA_37( 6 - f t )

FRS-901-3

23G53203

229U25361.(25 k\, \ /)

E3564A

FCX68

S_LX1 7

S_RX34

239U52512

2 . I . I A e r i a l

The antenna uni ls of MD-3210 and MD-3220 are respect ive ly prov ided wi th a6- foot aer ia l for t ransmit t ing and receiv ing radiowave. The aer ia l is a nonresonan t t ype s lo t ted a r ray wavegu ide wh lch rad ia tes and rece ives an X-bandhor i zonLa l po la r i za t ion m ic rowave .One end o f the aer ia l i s connec ted tothe magnetron v ia rotary jo in t and c i rc-u1ator , whi le the other end is ter -

A e r i a L

1 4 a g n e t r o n

H T S u p p l y &M o d u L a t o r L ' i m i t e r ' I F A m p .

S c a n n e rC o n n e c -

t i o n( s c 0 N )

S H F G e n .

M o t o r

A Z I G e n .

D n f : n r r

J o ' i n t

i r c u I a t o r '

MD-32I0/ 3220 Serv ice Manual-01 2-1

minated w i th a match ing 1oad. The ver t i ca l beam wid th 22o is w ide enought o a v o i d l o s i n g t a r g e t e c h o e s w h e n t h e s h i p i s r o l 1 i n g . T h e h o r i z o n t a l b e a mw i d t h I . 2 " o f 6 - f o o t a e r i a l g i v e s g o o d b e a r i n g r e s o l u t i o n . F i g . 2 . I . I 1 1 -l u s t r a t e s a n e x a m p l e o f s l o t L e d a r r a y w a v e g u i d e a e r i a l .

S L o t t e d w a v e g u ' i d e

M a i n b e a md i r e c t i o n

Fig. 2. I .1 Slot ted Array Waveguide Aer ia l

2.1.2 Antenna motor

&7 / -

F e e d i n g e n d

T h e a n t e n n a m o t o r r o t a t e s a t a s p e e d o f 2 , 1 6 0 r p r n . I t h a s b u i l t - i n 1 5 : 1 r e -d u c t i o n g e a r s , a n d t h e p l n i o n s h a f t i s c o u p l e d t o t h e m a i n g e a r w i t h r e d u c -t i o n r a t e o f 6 : I t o r o l a t e t h e a e r i a l a t 2 4 r p m . T h e m o t o r i s p o w e r e d f r o m2 4 V D C w i t h p o w e r c o n s u m p t i o n o f 1 5 - w a t t . A p h o t o - i n t e r r u p L e r i s m o u n l e do n t h e m o t o r t o g e n e r a t e a z i m u t h ( A Z I ) p u l s e s . F i g . 2 . I . 2 s h o w s a s i m p l i f i -ed schemat ic o f the an tenna motor assembly .

P i n i o n

R e d u c t i o n

A Z I G e n e r ^ a t o r

F i g . 2 . I . 2 Antenna Motor Assenbly

2.I .3 SIIF and AZI generators

( 1 ) S H F

A l e a d s w i t c h a s s o c i a t e d w l t h a m a g n e t i s p r o v i d e d f o r g e n e r a L i n g t h esh ip 's head ing f lash (SHF) s igna l . A t the moment when the rnagnet rnountedo n t h e m a i n g e a r p a s s e s b y t h e l e a d s w i t c h , t h e c o n t a c t c l o s e s a n d g e n *e r a t e s n e g a t i v e p h a s e S H F p u l s e s i g n a l . T h e s i g n a l i s f e d t o t h e b u f f e ra m p l i f i e r Q l - d o f t h e s c a n n e r c o n n e c t i o n b o a r d ( S C O N ) , a n d t h e n d e l i v -e r e d t o t h e d i s p l a y u n i t v i a p i n # 1 8 o f E 1 .

( 2 ) AZ r

0 n t h e e n d o f t h e m o t o r s h a f t o p p o s i t t o t h e p i n i o n g e a r , a h o l e i s m a d ea l o n g t h e d i a m e t e r . A s s h o w n i n F i g . 2 . I . 3 . 1 , t h e h o l e d e n d o f t h e s h a f ti s i n s e r t e d i n t o t h e p h o t o i n t e r r u p t e r Q 3 w h i c h p r o d u c e s t w o p u l s e s i g -n a l s a t e v e r y r o t a t i o n o f t h e s h a f t . A s t h e m o t o r n o r m a l l y r o t a t e s a ta s p e e d o f 3 6 r e v o l u t i o n s p e r s e c o n d , t h e r e p e t i t i o n r a t e o f s i g n a l 1 s7 2 p p s . T h e a e r i a l i s r o t a t e d a t o n e 9 0 t f r o f t h e m o t o r r e v o l u t i o n w i t ht h e b u i l t - i n r e d u c t i o n g e a r s a n d p i n i o n / m a i n g e a r s , 1 8 0 p u l s e s i n g a l sa r e p r o d u c e d p e r o n e r e v o l u t i o n o f t h e a e r i a l . T h e s i g n a l i s f e d t o t h eb u f f e r a m p l i f i e r Q l - b , a n d t h e n t o Q 4 o f t h e P L L f r e q u e n c y m u l t i p l i e r i n

S L o t t e d A r r a y A e r i a L

M o t o r ^

1 1z-- z- t " lD-32 I0 / 3220 Serv ice Manual-01

the scanner connect ion (S CON) board . The mul t ip l ie r Q4 cons is ts o f ap h a s e c o m p a r a t o r a n d v o l t a g e c o n t r o l l e d o s c i l l a t o r ( V C O ) . W h e n t h e A Z Ipu lse t ra in f rom the motor i s fed to Q4 p in #L4 v ia AZI IN te rmina l E3,t h e c i r c u i t m a d e o f C 7 , C B , Q 2 , Q 3 , a n d R 8 t h r o u g h R 1 0 l o w e r s t h e l e v e lo f Q4 p in #5 wh ich makes Q4 to s ta r t opera t ion . The Q4 outpu t f requencyi s o r d i n a r i l y d i v i d e d i n t o I / S b y d i v i d e r s Q 5 a n d Q l - a . T h e p h a s e d i f -f e r e n c e b e t w e e n o u t p u t s i g n a l s o f t h e d i v i d e r a n d b u f f e r Q i - b i s d e t e c t -ed by the phase compara tor . The er ro r vo l tage is fed to the VCO so tha tthe ou tpu t f requency o f Q4 is he ld a t f i ve t imes o f the input . The ou t -pu t o f Q4 is de l i vered as 360 Hz az imuth pu lse s igna l (AZIP) to the d is -p l a y v i a b u f f e r Q i - c .

S H F s w i t c h

M o t o r S h a f tH o L e

P h o t oI n t e r r u p t e r

0 3S H Fp u L S e

A z i m u t hp u L S e

L'B1F i g . 2 . 1 . 3 . 1

F i g . 2 . I . 3 . 2 s h o w s

E3

ock Diagram of SI#/AZI Circuir (S CON)

t h e w a v e f o r m s o f t h e A Z I c i r c u i t .

04-3

04-4

o5-1 5

o5-9( L o a d )

Fig. 2. I .3 .2 Waveforms of AZI Ci rcu i t

2 .L .4 Transmit t ing sect ion

The t ransmi t t i ng sec t ion ma in ly cons is ts o f the nodu la to r , pu lse t rans fo rm-er , and magne t ron . MRT-133 fo r MD-3210 i s bu i l t w i th a 10 kW modu la to r , andMRT-134 for MD-3220 wi th 25 kW modulator . The operat ional theory of modula-tor is s imi lar to both models; however , number and rat ings of some compo-nen ts a re d i f fe ren t . In the fo l l ow ing desc r ip t ion , the ra t ings and compo*n e n t s w i t h b r a c k e t s t ] a p p l y t o 2 5 k W m o d u l a t o r . F i g . 2 . I . 4 s h o w s a s i m -p l i f i ed b lock d iag ram o f 10 kW modu la to r toge ther w i th pu lse t rans fo rmer ,magne t ron , and p ro tec t ion d iodes . Re fe r to respec t i ve c i r c .u i t d iag rams fo rde ta i led numbers o f the c i r cu i t comDonents .

( 1 ) Modu la to r

A I two ] thy r i s to r i s used fo r p roduc ing h fgh vo l tage nega t i ve pu lses toac tua te the magne t ron . Capac i to rs C9 to C16 [C9 to C22 ] o f the pu lseforming network (PFN) are charged up by the +300 V (MOD S) sent f rom the

F [ - 1 f 7 2 H z

_fl_Itj-l 360 H2-.--l F - 2 - 8 m s e c a p p r o x

B u f f e r0 1 - d

D i v i d e r1 / 6 o r 1 / 5

Q 5 , Q 1 - a

B u f f e ro 1 - b

MD-32I0 / 3220 Service Manual-O1 . \ 2L _ J

d i s p l a y p o w e r s u p p l y , v i a c h a r g i n g c h o k e T 1 [ L l ] a n d s e r i e s d i o d e Q 7 .T h e c h a r g i n g o p e r a t i o n u t i l i z e s t h e r e s o n a n t f r e q u e n c y d e t e r m i n e d b yinduc tance o f the charg ing c .hoke and capac i tance o f PFN. The charg ingc u r r e n t f l o w s o n l y i n t h e p o s i t i v e h a l f - c y c l e o f t h e r e s o n a n t s i n u s o i d a lwave and the vo l tage reaches tw ice as much o f the source vo l tage. Thes e r i e s d i o d e Q 7 b l o c k s r e v e r s e c u r r e n t f l o w i n t h e f a l l i n g p e r l o d s ot h a t t h e l i n e i s h e l d i n h i g h v o l t a g e .

I

t--KTl TK-ZI I-KslL-J L--J

H . T ,s u p p L y

T r i g g e ri npu t

GND

M a g n e t r o nh e a t e r

l lagnet ronM i c r o w a v e

I

Fig, 2.I .4 Sinpl i f ied Block Diagram of 10 kW Modulator

Shor t l y a f te r the charg ing vo l tage became max imum, a t r i gger pu lse i sg i v e n t o t h e g a t e o f t h y r i s t o r Q 9 [ Q 9 , Q 1 0 ] a n d t h e n L h y r i s t o r c o n d u c t sd ischarg ing the PFN. The L and C o f PFN are sw i t ched b1 , ' re1a1 's K l to K3as shown in the l i s t be low to de te rmine the pu lse lensLh .

Table 2.I.4 Pulse Length Switching

Pulse length( u s e c )

RelayK1 K2 K3

0 . 0 80 . 30 . 6r . 2

OFFONONON

OFF'OF'FONON

OF'F'OF'FOFF'ON

S e l i e sd ' i ode Q7

T h e p r o t e c t i o n d i o d e Q l 0r e v e r s e v o l t a g e . C h o k e L 9cur ren t a t the momenl when

I Q l 1 ] a v o i d s d a m a g e o fI L 9 , L 1 0 ] p r o t e c t s t h ei t i s t u r n e d o n .

P r o t e c t i o nd i o d e s

Pu tset rans former

t hy r i s to r caused by athy r i s to r f rom a rush

T h e c i r c u i t a r o u n d T 2 [ L 1 3 ] a n d Q 1 1 [ Q 1 3 ] i " p r o v i d e d t o d e t e c t t h e m a e -n e t r o n c u r r e n t f o r m o n i t o r i n g t h e p e r f o r m a n c e o f t h e t r a n s m i t L e r .

( 2 ) P u l s e t r a n s f o r m e r a n d m a g n e t r o n

W h e n t h e t h y r i s t o r c o n d u c t s , a d i s c h a r g i n g c u r r e n L f l o w s f r o m P F N c a p a -c i t o r s t h r o u g h t h e p r i m a r y w i n d i n g o f p u l s e t r a n s f o r m e r ( P T ) , p r o d u c i n gh i g h v o l t a g e n e g a t i v e p u l s e . T h e o u t p u t v o l t a g e o f P T i s L h e n s t e p p e d u pt o 5 . 8 k V [ 7 . 8 k V ] t o e n e r g i z e t h e m a g n e t r o n V i . A s t h e P F N i m p e d a n c e i sd e s i g n e d a s m a t c h i n g t o t h e m a g n e t r o n i m p e d a n c e v i a p u l s e t r a n s f o r m e r ,t h e e n e r g y f r o m P F N i s e f f i c i e n t l y t r a n s f e r r e d L o t h e 1 o a d . U n a v o i d a b l es11ght mismatch ing be tween them may cause to induce a reverse vo l tage a tt h e m a g n e t r o n c a t h o d e . P r o t e c t i o n d i o d e s Q l a n d Q 2 w i t h R l a r e p r o v i d e dt o s h u n t t h e r e v e r s e v o l t a g e t o p r o t e c t t h e m a g n e t r o n .

I C h a r g ' i n g

I , c h o k e T 1| -

C h o k e L 9

T h y l i s t e r Q 9

P r o t e c t i o nd i o d e Q 1 0

T r i g g e r

M a g . C u r .d e t e c t o r

2-4 l4D-32L0 / 3220 Service Manual-Ol

2. I .5 Dup lex ing assenb ly

T h e d u p l e x i n g a s s e m b l y c o n s i s t s o f c i r c u l a t o r V 4 a n d l i m i t e r V 5 . C i r c u l a t o rFCX68 fo r bo th type scanners func t ions to sw i tch the mic rowave s igna l amongt h e r o t a r y j o i n t , t r a n s m i t t e r , a n d r e c e i v e r . D u r i n g t h e t r a n s m i t t i n g p e r i -o d , t h e c i r c u l a t o r f e e d s t h e h i g h p o w e r m a g n e t r o n o u t p u t t o t h e s l o t t e d a r -r a y a e r i a l w i t h o u t l e a k a g e t o t h e r e c e i v i n g s e c t i o n . I n t h e r e c e i v i n g p e r i -o d , t h e c l r c u l a t o r t r a n s f e r s t h e r e c e i v i n g m i c r o w a v e s i g n a l t o t h e f r o n te n d m o d u l e v i a l i m i t e r w i t h v e r v 1 o w l o s s o f t h e p o \ , { e r .

The l im i te r d lode NJS6930 [S-LX17 ] p ro tec tes Lhe f ron t end modu le MIC f roma h igh power m ic rowave invas ion , i n te rna l l y f rom Lhe magne t ron o r ex te rna l -1y f rom o ther radars .

2. I .6 Receiv ing sect ion

T h e r e c e i v i n g s e c t i o n c o n s i s t s o f t h e f r o n t e n d m o d u l e ( F E M ) a n d I F u n i tw i t h a l o g a r i t h m i c a m p l i f i e r .

( I ) F r o n t e n d m o d u l e ( F E M )

A r n i c r o w a v e i n t e g r a t e d c l r c u i t s o c a l 1 e d M I C i s u s e d f o r t h e f r o n t e n dm o d u l e ( F E M ) o f t h e r e c e i v i n g s e c t i o n . T h e i 0 k W o u t p u t s c a n n e r M R T - 1 3 3u s e s t h e M I C t y p e N J T i 9 4 6 , w h i l e 2 5 k W s c a n n e r M R T - 1 3 4 u s e s t y p e S - R X 3 4 .B o t h t y p e s r e q u i r e s e p a r a t e l i m i t e r , i . e . N J S 6 9 3 0 f o r M R T - 1 3 3 a n d S - L X I 7f o r M R T * I 3 4 . T h e I V I I C m a i n l y c o n s i s t s o f a w a v e g u i d e - t o - c o a x i a l c o n v e r t -e r , 1 o w n o l s e f r o n l e n d G a A s F E T a m p l i f i e r , F E T 1 o c a l o s c i - l l a l o r , b a 1 -a n c e d m i x e r , m o n i L o r c i r c u l L , a n d p o w e r s u p p l y . A 1 1 e l e m e n t s a r e m o u n l e di n a s i n g l e m o d u l e , m a k i n g t h e F F M s o c o m p a c t . T h e G a A s F E T a m p l i f i e rd i r e c t l y a m p l i f l e s t h e X - b a n d m i c r o w a v e o f t h e r e t u r n e d e c h o s i g n a l . T h eF E T 1 o c a 1 o s c i l l a t o r f r e q u e n c y i n 9 , 4 7 0 M H z i s s i m p l y c o n t r o l l e d b yv a r y i n g t h e t u n i n g v o l t a g e . T h e b a l a n c e d m i x e r c o n v e r t s t h e r e c e i v l n gs i g n a l f r e q u e n c y t o 6 0 N H , z i n t e r m e d i a t e f r e q u e n c y ( I F ) . F i g . 2 . I . 6i l l u s t r a t e s t h e b l o c k d i a g r a m o f M I C f r o n t e n d m o d u l e .

R Fi npu t

Ope ra t i on GND Tun ' i ngV o L t a g e V o L t a g e( + 5 V ) ( + 4 V t o + 2 4 V )

Fig. 2.L.6 Block diagram of MIC Front End Module

MD-32 IO/ 3220 Service Manual-0l

I Fou t pu t

M o n i t o r

M o n i t o rC ' i r c u i t

Wavegu ' i de -t o - c o a x i a LC o n v e r t e r

B a L a n c e dM i x e r

G a A s F E TA m p L i f i e r

F E T L o c a L0 s c i t t a t o r

Powe rSupp t y

2-5

( 2 ) I F u n i t

T h e I F u n i t m a i n l y c o n s i s t s o f t h e l o w - n o i s e l i n e a r p r e a m p l i f i e r , b a n d -p a s s f i l t e r , l o g a r i t h m i c a m p l i f i e r , a n d t u n i n g i n d i c a t i o n c i r c u i t .

T r a n s i s t o r Q 6 m a k e s l o w - n o i s e p r e a m p l i f i e r w i t h a p p r o x . 2 0 d B g a i n . T h erece iv ing bandwid th o f the ampl i f ie r i s de termined by r rQr r o f the band-p a s s f i l t e r ( B P F ) m a d e o f L l a n d C 5 4 . T h e r f Q r f i s c o n t r o l l e d b y B W s i g n a ls e n t f r o m t h e d l s p l a y , a c c o r d i n g t o t r a n s m i t t i n g p u l s e w i d t h a s s h o w ni n T a b l e 2 . 1 , 6 . I n l o n g r a n g e s , B W s i g n a l b e c o m e s 1 2 V a n d d i o d e Q 5 i sc u t o f f i n c r e a s l n g f r Q r r o f t h e c i r c u l t . H i g h t r Q f r b r i n g s s h a r p r e s o n a n c ea n d h i g h g a i n t o t h e a m p l i f i e r . I n s h o r t r a n g e s , B W s i g n a l b e c o m e s 0 Vt u r n i n g Q 5 t o c o n d u c t , l o w e r i n g f r Q f r o f t h e c i r c u i t . L o w f f Q r r b r i n g s b r o a dr e s o n a n c e w i t h h i g h f i d e l i t y f o r c l e a r l y p r e s e n t i n g s h o r t r a n g e i m a g e s .

Table 2.L.6 Tx Pulse Width vs IF Bandwidth

Tx Pulse l{idth( u s e c )

IF Bandwidth(MHz )

BW Signal

0 . 0 8 & 0 . 3 1 5 O V

0 . 6 & r . 2 5 + L 2 V

The logar l thmic IF ampl i f ie r c i rcu i t i s made o f cascade connected sevend u a l - g a i n l o g - a m p l i f i e r s h a v i n g h i g h f i d e l i t y o f p u l s e s i g n a l a n p l i f i c a -t i o n . T h e I F s i g n a l i s a m p l i f i e d b y Q 6 t h r o u g h Q 3 5 , a n d t h e n d e t e c t e d b yQ 3 7 . T h e d e t e c t e d s i g n a l i s t h e n a m p l i f i e d b y t h e v i d e o a m p l i f i e r s Q 3 9 ,Q 4 0 , a n d Q 4 1 .

A m p l i f i e r s Q 4 3 t h r o u g h Q 5 1 r e c e i v e p a r t i a l o u t p u t o f Q 6 . T h e t r a n s m i t -t ing pu lse leaked f rom c i rcu la to r and conver ted to 60 NIHz IF by FEM isd e l e c l e d b y t h i s c i r c u i t a n d t r a n s f o r m e d i n t o D C v o l t a g e f o r t u n i n g i n -d i c a t i o n i n t h e d i s p l a y . T h e b a n d w l d t h 5 W l z o f t h e c i r c u i t i s g i v e n b yC 7 4 a n d T 2 . I n o r d e r t o a v o i d i n t e r f e r e n c e s o f o t h e r r a d a r s f o r s t a b l et u n i n g i n d i c a t i - o n , Q 4 3 i s e n a b l e d o n l y f o r L h e L r a n s m i t t i n g p e r i o d w h e nT R I G s i g n a l i s a p p l i e d .

The f ront end module MIC tuning vol tage +25 t5 V is suppl ied f rom thed isp lay . The semi f i xed res is to r R l i s ad jus ted so tha t the rece ive r i stuned to the best polnt on the long range when the vol tage is +25 V.

2-6 MD-32 I0 / 3220 Serv ice Manua l -01

2.2 D isp lay un i t

T h e d i s p l a y u n i l c o n s i s t s o f t h e f o l l o w i n g p r i n t e d c i r c u i t b o a r d s a n d a s -s e m b l l e s .

( 1 ) P o w e r s u p p l y( 2 ) L i n e f i l t e r s( 3 ) L o g i c u p p e r(4 ) Log ic lower(5 ) Con t ro l pane l w i th

membrane sheet(6 ) CRT un i t

T h e c o n t r o l c i r c u i t ( I C 3 )wave s igna l and con t ro lsthe ou tpu t vo l tage 1eve1 .POWER sw i tch , approx . i 0 Vcu i l . Accord ing to the CR

MD-32IO / 3220 Serv ice Manual-01

MD-32 LO / 3220-6000MD-3210-6100 & LF2i5NEWMD-32 10-7000MD-32 10-71 00MD-32 1 0-7200

KzOMM-O 1 B

f u n c t i o n s L o o s c i l l a t e s t h e s w l t c h i n g s q u a r et h e d u t y o f t h a t s i g n a l i n o r d e r L o r e g u l a t eWhen the power i s Lurned 0N by press ing thes t a r t i n g v o l l a g e i s g i v e n l o t h e c o n t r o l c i r -c o n s t a n t ( C B , R 2 0 , a n d V R l ) c o n n e c t e d t o t h e

T h e b l o c k d i a g r a m o f t h e d i s p l a y u n i t l s i l l u s t r a t e d i n F i g . 2 . 2

F romG y r o ' - " - )

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r - - - - - " , - _ - i - - lII GYRO INTERFACEI

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T o / f r o mANTENNAU N I T

F i g . 2 . 2Block Diagran ofDisplay Unit

12124132 VDC ( i lD-3210)24 VDC t10Z 0{D-3220)

2.2.I Power supply (l ' lD-321O/322O-6000)

M D - 3 2 1 0 i s o p e r a t e d b y t h e s h i p t s m a i n s o f 1 1 L o 1 8 , o r 2 I t o 3 6 V D C , w h i l eMD-3220 by 24 VDC I IOZ. The sh ip ' s ma in i s fed v ia l i ne f i l t e rs (MD-3210-6100 and LF-215) . The power supp ly MD-32 I0 /3220-6OOO is used fo r bo th t yperadars . The power supp ly conver l s the sh ip ' s ma ins to severa l k inds o f sup-p 1 y v o l t a g e s b y m e a n s o f a p u l s e c o n t r o l l e d s w i t c h i n g r e g u l a t o r . F i g . 2 . 2 . I(a ) shows the b lock d iag ra rn o f the power supp ly and l i ne f i l t e rs .

( f ) C o n t r o l c i r c u i t

') -7L - t

I C , t h e c i r c u i t o s c i l l a t e s a s w i t c h i n g s i g n a l l n a f r e q u e n c y o f 7 0 t l k H z .H a l f - c . y c l e s o f t h e s i g n a l a r e a l t e r n a t e l y a p p l i e d t o p u s h - p u 1 1 s w i t c h i n gc i r c u i t 1 a n d 2 r e s p e c t i v e l y . T h e w i d t h o f a p p l i e d s q u a r e w a v e i s c o n -t r o l l e d s o t h a t t h e o u t p u t v o l t a g e o f t h e c i r c u i t i s s t a b i l i z e d .

1 2 / ? 1 V!10t

POI"JERS w i t c h

Just af ter the power is turned 0N,t i va tes IC3 p reven t ing rush cu r ren tto protect the swi tch ing FETs, anda r e s h o w n i n F i g . 2 . 2 . 1 ( b ) .

+ 8 V

R e g u L a t e d+ 5 VR e g u L a t e d+ 1 2 V14agne t r onh e a t e r

R e g u L a t e d- 1 2 V

+ 1 0 0 V

+ 5 0 v

R e g u L a t e d+ 1 5 v

+300 v

F l o a t i n g2 4 V D C

t h e s o f t - s t a r L c i r c u i t g r a d u a l l y a c -and r ing ing o f the swi tch ing c i rcu i tr e c t i f l e r d i o d e s . T y p i c a l w a v e f o r m s

Fig. 2.2.I (a) Block Diagram of Power Supply and Line Fi l ters

0 s c i L L a t i o n I C 3 - 5

S o f t - s t a r t I C 3 - 4

S w i t c h i n g - 1 I C 3 - 8

S w i t c h ' i n g - 2 I C 3 - 1 1

E r r o r d e t e c t I C 3 - 1

Fig. 2.2.L (b) Waveforms of Contro l Ci rcu i t

When the so f t - s ta r t pe r iod comp le tes and the DC vo l tages become s tab le ,a par t o f the +100 V ou tpu t i s fed to the e r ro r vo l tage de tec to r (Q i9 ,20 , D36) . VR3 [V ADJ] se ts the re fe rence po in t o f the vo l tage regu la to rc i r cu l t . The e r ro r vo l tage i s fed back by pho to -coup le r Q2B to the con-

L ' i n e F i L t e r s

tY lD -3210 -6100&

L F - 2 1 5

S w i t c h i n gC i r c u i t 1

Q 1 , 2 , 1 1 , 1 2

S w i t c h i n gC i r c u i t ?

Q 3 , 4 , 1 3 , 1 1+1 00v

R e c t ' i f i e rD 4 t o 7O v e r V o L t .

Q 9 , 1 0

C o n t r o LC i r c u ' i t

r c 3

E r r o rV o L t a g eD e t e c t o rQ19 ,20,28Powe r 0N

a 5 t o 8

+300 VR e c t i f i e rD 1 2 t o 1 9

T xS w i t c hQ 2 3 t o? 6 , 2 9

P o w e r 0 F FQ 1 6 , 1 7

S o f t S t a r tc 1 1 P < ' 1 < 7

? 4 UR e c t i f i e r

D 3

R e g . + / - 1 ? V &C o n s t . C u r r e n t

R e c t i f i e rD 1 , 3 3 , 3 4 , r c l , 5 r 4

2-8 MD-32 I0/ 3'220 Service Manual-Ol

t ro l c i rcu i t IC3 to au tomat ica l l y ad jus t the du ty o f sw i tch ing waveformso tha t the er ro r vo l taee is min imized.

I f t h e s h i p ' s m a i n s u p p l y i s h i g h e r t h a n 4 2 V , o v e r - v o l t a g e d e t e c t o r - l( Q 9 , 1 0 ) d o e s n ' t a l 1 o w I C 3 t o s t a r t s w i t c h i n g o s c i l l a t i o n . O v e r - v o l t a g edetec tor -2 (Q30) mon i to rs the ou tpu t vo l tage o f the motor power 24 Vr e c t i f i e r d i o d e D 3 . T h e v o l t a g e i s a d j u s t e d b y V R 2 [ V L M T ] a n d f e d t o

Q 3 0 v i a z e n e r d i o d e D 2 B . I f t h e s h i p ' s m a i n s u p p l y o r o s c i l l a t i n g o u t p u t1 e v e 1 b e c o m e e x c e s s i v e l y h i g h , Q 3 0 c o n d u c t s t o s t o p o p e r a t i o n o f I C 3 .F u 1 1 y c l o c k w i s e p o s i t i o n o f V R 2 c o r r e s p o n d s t h e s h i p ' s m a i n o f 4 L V .

When P0WER swi tch is p ressed fo r more than 3 seconds, C13 is charged upf i r s t ^ . ' d t h e n C L 4 l s c h a r g e d u p t h r o u g h Q 1 6 a n d D 2 5 . Q 1 7 a n d Q 1 5 t h e nc o n d u c t c o n s e q u e n t l y t o s t o p I C 3 s w i t c h i n g o p e r a t i o n .

( 2 ) R e c t i f i e r c i r c u i t s

S t e p p e d u p / d o w n s w i t c h i n g w a v e v o l t a g e s d e r i v e d f r o m s e c o n d a r y w i n d i n g so f t r a n s f o r m e r T 1 a r e r e c t i f i e d a n d s m o o t h e d b y f u 1 1 - w a v e o r b r i d g e - t y p er e c t i f i e r s i n t o v a r i o u s D C s u p p l y v o l t a g e s . + I 2 V , - I 2 V , a n d + 5 V a r ef u r L h e r r e g u l a L e d b y r e s p e c L i v e L h r e e L e r m i n a L v o l L a g e r e g u l a L o r s .

T h e m a g n e t r o n h e a t e r v o l l a g e i s s u p p l i e d f r o m I C 5 t h r o u g h R 4 5 , 4 6 , 8 2 ,a n d V R 4 . T h e c i r c u i t d e l i v e r s 0 . 5 5 A c o n s t a n t c u r r e n l i n s h o r t r a n g e a n d0 . 4 4 A i n l o n g r a n g e o p e r a L i o n L o t h e m a g n e t r o n h e a t e r . T h e o u t p u t v o l t -a g e a t T P 5 i s a p p r o x . 7 V f o r o b t a i n i n g 6 , 3 V a t m a g n e t r o n h e a t e r . V R 4a d j u s l s t h e c u r r e n l L o 0 . 5 5 A c o n s t a n t i n s h o r t r a n g e o p e r a t i o n . I n l o n gr a n g e , t h e l o g i c b o a r d C P U d e l i v e r s ' h i g h '

I H . C . : h e a t e r c o n t r o l ] s i g -n a 1 , w h i c h a c t u a t e s p h o t o - c o u p l e r Q 3 2 t o s h u n t V R 4 . A s a r e s u l t , t h ec i r c u i t b e c o m e s t o d e l i v e r O . 4 4 A c o n s t a n t c u r r e n t t o t h e n a g n e t r o n .

2 . 2 . 2 L o g i c s e c t i o n

T h e l o g i c s e c t i o n i s c o m p o s e d o f t h e l o g i c u p p e r a n d l o g i c l o w e r b o a r d s .T h e l o g i c u p p e r b o a r d b a s i c a l l y f u n c t i o n s w i t h a C P U t o d i g i t a l l y c o n t r o lt h e s y s L e m . T h e l o g i c l o w e r b o a r d m a i n l y f u n c t i o n s t o p r o c e s s t h e r a d a rv i d e o s i g n a l , o s w e l l a s t o p r o d u c e t r i g g e r p u 1 s e .

( 1 ) L o g i c u p p e r ( M D - 3 2 1 0 - 7 0 0 0 )

T h e l o g i c u p p e r b o a r d c o n s i s t s o f t h e f o l l o w i n g c i r c u i t s :

C P U a n d p e r i p h e r a l c i r c u i tA d v a n c e d C R T c o n t r o l l e r ( A C R T C )

ACRTC cont ro l c i rcu i tCharac ter v ideo memoryC h a r a c t e r o u t p u t c i r c u i tD I P s w i t c h r e a d i n g c i r c u i tO t h e r s

(a ) CPU and per iphera l c i r cu i t

A 16-b i t m ic . rop rocessor UPD7020B (V40) i s used as8-k RAI ' I . The CPU t ransfers B-b i t da la through Lhecon ta ins A0 th rough A19 . A0 to A7 a re la tched a tA 1 9 a t I C 2 H ( H C 3 7 3 ) , w h i l e A 8 t o A 1 5 a r e d i r e c t l y

MD-32L0/ 3220 Serv ice Manual-Ol

CPU with 64-k ROM andd a t a b u s . A d d r e s s b u sICZC (HC373 ) , A16 to

t rans fe r red f rom CPU.

2-9

CPU operates wi th 10 MHz c lock made f rom the 20 Wl,z osc i l la tor output .

When the power is turned ot r , the power-on-c lear (POC) IC4K holds RESETte rmina l ( p i . #7 I ) o f CPU in "1ow" fo r severa l m i l l l seconds a f te r thelog ic vo l tage has been s tab i l i zed . CPU is rese t ( c lea red) in th i s pe r iodun t i l t he leve1 becomes "h igh" . A t the same t ime , POC s igna l de l i ve redfrom POC terminal resets other d ig l ta l c i rcu i ts such as RAM and ACRTC.

CPU is p rov ided w i th bu i l t - i n se r ia l da ta con t ro l un i t (SCU) to accep ta se r ies inpu t da ta d i rec t l y f rom nav iga to rs v la RXD te rm ina l .

T h e b l o c k d i a g r a m o f C P U i s s h o w n i n F i e . 2 . 2 . 2 . I .

A d d r e s s B u s Dala Bus

D 0 -

D I PSwi tch+ 5 V

Ser i a l

T n t o r l r r r r tr r r u r . r r v l r v

A C R T CDat

{t

AZPI NT3I NT6

RAMEnab I e

o t h

F i g . 2 . 2 . 2

--t,I

POC

. l

ROM Enab le

t odev i ce

Block Diagram of CPU

The CPU accep ts fo l l ow ing inLer rup t s igna ls .

rNTPZ AZP sent f rom logic lower board (Reformed AZrP)INTP3 Transfer end s lgnal f rom KCD-24INTP6 Reques t f rom gy ro in te r face un iL

AZP and L rans fe r end s igna l con t ro l the t im ing o f da ta t rans fe r f rom LSIto radar memory . The az imuth pu lses a re genera ted in the an tenna d r i vemoto r . The s igna l i s app l ied to the PLL 6 - t ime f requency mu l t i p l i e r i nt h e S C O N b o a r d a s m e n t i o n e d i n p a r a . 2 . 1 . 3 ( 2 ) , a n d 1 , 0 8 0 A Z I P p u l s e sare senl to the d isp lay per one antenna revolut ion. AZIP is reformed inthe log ic lower board in to AZP and sent to CPU. Between AZP pulses, CPUgenerates f ina l t iming pulse AZI to t ransfer 6-sweep dala f rom LSI tothe v ideo memory . A to ta l o f 6 ,480 sweep da ta t rans fe r comp le tes onea n t e n n a r e v o l u t i o n , i . e . 3 6 0 ' r o t a t i o n . F i g . 2 . 2 . 2 . 2 s h o w s t h e d a t at rans fe r r ing t lm ing char t .

AZP

AZI

IIII}

Data Transferring Timing Chart

RESET

RXD

I NTP2I NTP3iNTP6 POC

Power-0n-C l e a r ( P O C ) ROl| Enable

r Data set t ing

transfer

2* ro

F i g . 2 . 2 . 2 . 2

MD-32 I0 / 3220 Serv ice Manua l -0 l

(b ) Advanc.ed CRT cont ro l le r (ACRTC) and charac ter v ideo memory

Under CPU cont ro l , ACRTC IC9C (HC63484) genera tes a l l images o ther thanr a d a r i m a g e s . T h o s e i m a g e s i n c l u d e 1 i n e s , r i n g s , s y m b o l s , m a r k s , & s w e l las a lpha-numer ica l charac ters such as range sca les , VRM/EBL va lues , andother da ta . The produced image da ta a re wr i t ten in to the charac le r v ideo

m e m o r i e s f r o m I C 5 A t o I C 1 2 A . I h e o p e r a t i n g c l o c k i s 2 C L K w h i c . h i s m a d eb y d i v i d i n g t h e r e a d i n g c l o c k D C K o f v i d e o R A M i n t o I / 8 . F i g . 2 . 2 . 2 . 3i l l u s t r a t e s t h e b l o c k d i a g r a m o f A C R T C , v i d e o R A M ( V R A M ) a n d t h e i r p e r i -o h e r a l d e v i c e s .

D 0 - D 7 A D O - A D 1 5 , Rad arD i s p l a yA d d r e s s

Charac Le rV i d e o0 u L p u L

a o , , {L

CRT unr t

nuOu, fLSI 1

\/D <_-

E. SYNC -

VCK ---DCKH1

Fig. 2.2.2.3 Block Diagran of ACRTC and Per ipheral Devices

E . S Y N C s y n c h r o n i z e s t h e p r e s e n t a t i o n o f r a d a r e c h o i m a g e a n d c h a r a c . t e rv i d e o . I t h a n d l e s t h e r a d a r L S I a s m a s t e r d e v i c e a n d A C R T C s l a v e ; h o w -e v e r , 3 s t h e h o r i z o n t a l s c a n n i n g l i n e n u m b e r 1 , 1 5 3 f o r 2 O - i n c h C R T e x -c e e d s t h e r a d a r L S I m a x i m u m s c a n n i n g l i n e n u m b e r I , 0 2 4 , t h e v e r t i c a l

s y n c a n d v e r l i c a l a d d r e s s o f A C R T C a r e u s e d f o r r a d a r p i c t u r e d i s p l a y ,i n s L e a d o f s u c h s i g n a l s o f r a d a r L S I . F i g . 2 . 2 . 2 . 4 i l l u s t r a t e s t h e t i m -i n g c h a r t o f A C R T C o p e r a t i o n , w h e r e A d e s i g n a t e s ' a d d r e s s t a n d D t d a t a t .

T C L K ( I C g C - 5 0 )

A S ( I C g C _ 5 3 )

A D O - A D 1 6 ( I C g C )( E X C E P T A D B )

A D B , A 1 7 - A D 1 9( I C 9 C )

H C Y C ( I C g C - 5 2 )

H R D ( I C g C - 5 5 )

DEAl i ( ICgC-54)t l l

I w r i t e c y c i e I R e a d c v c l e I

Fig . 2 .2 .2 .4 ACRTC Timing Chart

A s s h o w n i n F i g . 2 . 2 . 2 . 5 , t h e c h a r a c t e r v i d e o m e m o r y c o n s i s t s o f f o u rm e m o r y g r o u p s . T h o s e g r o u p s i n c l u d e t h e m e m o r i e s f o r m a r k e r s , p l o t t i n g

i m a g e s , a n d a l p h a - n u m e r i c a l l e t t e r s , p l u s o n e g r o u p n a m e d t m a s k ' w h i c hd e t e r m i n e s t h e p r e s e n t a t i o n a r e a o f t h e r a d a r i m a g e p i c t u r e . C o n t e n t so f the v ideo RAM is admin ls t ra ted by ACRTC which wr i tes and reads thedata in accordance w i th the command or da ta sent f rom CPU.

READY- f-$yfi]L l In te r faceF-

I r c g H , 3 F I

A C R T C. I

f q C

DTACKV R A H

I C s A , 6 A ,] A , 8 A ,9 A , 1 0 A ,

A d d r e s sL a t c h

I C 8 C , 8 DP a r a . - t o -S e r i a l

Conve r l e rI C 3 A , 4 A ,r 3 A , 1 3 8

MD-32I0/ 3220 Serv ice Manual-O1 2-r1

2 ,048 (512 x a ) b i t s - - l

b i t s

b i t s

Fig. 2.2.2.5 Composi t ion of Character Video Memory

One ch lp o f the v ideo RAM (TC5242562) i s a dev ice ca11ed 'dua1 por t RAM'c o m m o n l y u s e d f o r m e m o r y o f i m a g e s . I n a d d i t i o n t o o r d i n a r y I I O p o r t , i th a s s e r i e s d a t a o u t p u t p o r t t o d e l i v e r t h e d a t a i n s e r i e s . T h e m e m o r ycons is ts o f RAM and SAM (ser ies access memory) por t ions , each o f themi s f u r t h e r d i v i d e d i n t o f o u r b l o c k s . O n e b l o c k c o m p r i s e s 5 I 2 x 5 L 2 b i t sRAI ' I and 5L2 b i ts SAM. When read ing the conten ts o f RAM, 2 ,048 b i ts memo-r i e s f o r o n e C R T s w e e p l i n e ( 5 I 2 i n f o u r b l o c k s ) a r e t r a n s f e r r e d t o r e -s p e c t i v e S A M i n p a r a 1 1 e 1 a s s h o w n i n F i g . 2 . 2 . 2 . 6 . T h e d a t a i n S A M c a nb e r e a d o u t i n s e r i e s , l i k e a s h i f t r e g i s t e r , b y t h e s e r i e s c l o c k S C .F o u r b i t s p a r a 1 1 e 1 o u t p u t o f S A M i s t h e n f e d t o a p a r a l 1 e l / s e r i e s c o n -v e r t e r ( F 9 1 5 ) t o f i n a l l y d e l i v e r t h e d a t a i n s e r i e s . O n c e t h e d a t a i st r a n s f e r r e d f r o m R A M t o S A M , b o t h m e m o r y p o r t i o n s b e c o m e i n d e p e n d e n t .T h a t m e a n s , d u r i n g r e l a t i v e l y l o n g p e r i o d w h e n t h e d a t a i s b e i n g r e a df r o m S A M , R A M c a n b e f r e e l y r e a d o r w r i t t e n b y C P U c o n t r o l .

Random Access Pu i t

RADi CAI]512x512512x572

RASCASc n

-[,,,

I,,

sr04 ISI03 | Ser ia lS I02 | Por tsr01 JSC

F i g . 2 . 2 . 2 . 6

( . ) D IP sw l tches

Three DIP sw i tches , SW1,board in order to presetI . 5 . 2 f o r d e t a i l s o f t h ethree swi tches is read by

(d ) Pane l i n te r face c i r cu i t

S1, i l2 , and SW3 are prov lded on the log ic uppert h e f u n c t i o n o f t h e e q u i p m e n t . R e f e r t o p a r a .

f u n c t i o n s s e t b y L h e s e s w i t c h e s . T h e s t a t u s o fthe CPU v ia da ta bus , D0 th rough D7.

Block Diagram of Dual Port RAM

The pane l da ta s igna l (PDT) de l i vered in ser ies f rom the cont ro l pane li s c o n v e r t e d i n t o B - b i t p a r a 1 l e 1 d a t a i n t h e p a n e l l n t e r f a c e c i r c u i t .

3 i ' i4

2 - r2 MD-32I0/ 3220 Serv ice Manual-01

The panel c lock (PCK) andThe output pulse of VRM,counted and read by CPUt iming char t o f the panel

pane l s t robe s igna l (RCK) a re used fo r t im ing .EBL and t rack -ba11 encoders a re respec t i ve ly

t h r o u g h t h e d a t a b u s . F i g . 2 . 2 . 2 . 7 s h o w s t h ei n t e r f a c e c i r c u i t .

RCK ( ICsE- l2

PCK ( ICBE-11

PDT ( rCSE-14

Fig. 2 .2.2.7 T iming Chart o f Panel In ter face Circu i t

F i v e p i e c e s B - b i t s h i f r r e g l s r e r s w i r h l a r c h H C 5 9 5 ( I C B E , 5 H , 3 H , 6 H ,and 4H) a re p rov ided fo r pane l i n te r face c i r cu i t to rece ive the s igna lsf rom con t ro l pane l . The PDT s igna l t ra in i s sh i f ted ln to the reg is te rsc o n n e c t e d i n s e r i e s . E v e r y t i m e w h e n t h e 4 1 s t d a t a ( a l w a y s t l o w t n a m e ddammy da ta 0 ) i s en te red , a l l t he da ta b i t s a re la tched by the s t robepu lse PCK.

( 2 ) L o g i c l o w e r ( M D - 3 2 1 0 - 7 1 0 0 )

The log ic lower board MD-3210-7100 con ta ins ana log c i r cu i t s to p roducethe an tenna con t ro l s igna ls such as t r i gger , tune s igna l , pu lse w id thr e l a y c o n t r o l , a n d o t h e r s . I t a l s o h a s a n a l o g c i r c u i t s t o p r o c e s s r a d a rre tu rn echo v ideo s igna l en te red f rom the an tenna . App l i ca t ion spec i f i edIC (ASIC) LSI KD-24 i s moun ted in the c i r cu i t to d ig i ta l l y p rocess thee c h o s i g n a l s f o r s a m p l i r g , s c a n c o n v e r s i o n , i n t e r f e r e n c e r e j e c L i o n , e X -pans lon , and to wr i te Lhe radar v ideo da ta in to the v ideo memory underthe contro l o f CPU in the log ic upper board. The radar v ideo data in thev ideo memory i s then composed w i th the charac te r v ideo p roduced in thelog ic upper , and sen t to the CRT un i t to d i sp luy .

For understanding the ASIC LSI for radar Type KCD-24, refer to Appendix.

( a ) A n a l o g s i g n a l p r o c e s s i n g c i r c u i t ( C i r c u i t d i a g r a m 3 / 3 )

F i g . 2 . 2 . 2 . 8 i l l u s t r a t e s t h e b l o c k d l a g r a m o f a n a l o g s i g n a l p r o c e s s i n gc i r c u i t . T h e f r o n t e n d o f t h e c i r c u i t j - s d e s i g n e d t o a c c e p t v i d e o s i g -n a l s o f 2 V p - p m a x i m u m 1 e v e 1 . A s t h e r a w v i d e o s i g n a l s e n t f r o m t h ea n t e n n a u n i t i s a b o u t 3 . 5 V p - p , t h e l e v e 1 i s a p p r o p r i a t e l y a d j u s t e d t o2 V p - p b y t h e p o t e n t i o m e t e r V R l I V I D E O I N ] .

The FTC c i rcu i t suppresses the ra in o r snow echo images by a t tenuat ingt h e l o w f r e q u e n c y c o m p o n e n t o f t h e s l g n a l . T r a n s i s t o r Q 2 d e t e c t s r a p i d l yf a l l i n g e d g e o f t h e i n c o m i n g v i d e o s i g n a l . T h e F T C c o n t r o l v o l t a g e s e n tf rom the d isp lay 1s g iven to Q40 and var ies the cur ren t f low ing th roughd i o d e s D 2 a n d D l . I n o t h e r w o r d s , t h e o p e r a t i n g v o l t a g e 1 e v e 1 a t Q 4 b a s ei s d e t e r m i n e d b y d i o d e s a c c o r d i n g t o t h e F T C c o n t r o l , a n d f r o n t e d g e s o fe c h o s i g n a l s a r e s e l e c t i v e l y a m p l i f i e d b y t h e f o l l o w i n g c i r c u i t . T r a n -s i s t o r Q 3 s t o p s t h e c u r r e n t o f e c h o f r o n t t o f l o w t h r o u g h D 2 a n d D l .

The STC waveform is made f rom the t r igger pu lse fed to IC IL . T t re max imuma m p l i t u d e o f S T C w a v e f o r m i s a d j u s l e d b y V R 2 I S T C L E V ] , w h i l e t h e s t a r t -ing t ime by VR3 [ STC TIME] . The d ischarg ing curve o f STC waveform is de-t e r m i n e d b y t h e C R t i m e c o n s t a n t g i v e n b y C 1 0 t o C 1 3 , a n d R 2 2 t o R 2 5 .When the STC vo l tage is app l ied to Q7, the load res is tance o f Q5 is 1ow-

mM

MD-321O/3220 Serv ice Manual-01 2 - r 3

3 . 5 V p - pInax.

e r e d a n d t h e v i d e o g a i n i s d e c r e a s e d . A c c o r d i n g t o t h e r e c o v e r i n g v o l t -s B e , t h e g a i n o f d i s t a n t e c h o e s i s r e c o v e r e d . S T C k n o b o f t h e c o n t r o lp a n e l v a r i e s t h e 1 e v e 1 o f S T C c u r v e t o a d j u s t t h e e f f e c t i v e a r e a o f S T C .

Radar LSIAntenna

DVz ')DV6 iDV7 )

Video -rVR1 tr

1fr

ConlroiPanel FTC

STCG A I N

STC level VR2STC time VR3

Tri.gger Threshold VR4

FiB. 2.2.2.8 Block Diagram of Analog Signal Processing Circui t

T h e v o l t a g e g i v e n f r o m G A I N c o n t r o l v a r i e s t h e o p e r a t i o n a l r e s i s t a n c eo f Q 1 6 L o a d j u s t t h e a m p l i t u d e g a i n . T h e b a n d w i d t h o f l o w - p a s s f i l t e ri s var ied by L l and var icap d iode D9 w i th the cont ro l s igna ls PWO andP\ ,^ /1 de l l vered f rom CPU accord ing to RANGE.

The EXP c i rcu i t enhances the s ize o f ta rge t images by ho ld ing the peakv a l u e t o t h e l e n g t h d e t e r m i n e d b y t h e C R c o n s t a n t o f C 2 6 , C 2 9 a n d R 5 4to R60. The CR cons tan t i s sw i tched over so Lhat image enhancement s taysu n c h a n g e d o n t h e s c r e e n e v e n R A N G E i s v a r i e d . C o n t r o l s i g n a l s E X P , E X P O ,E X P 1 , a n d E X P 2 a r e d e l i v e r e d f r o m C P U .

T h e a m p l i f l e d a n a l o g s i g n a l i s f i n a l l y c o n v e r t e d i n t o 3 - d l g i t d i g i t a ls i g n a l s b y h i g h s p e e d c o m p a r a t o r s I C Z L , 3 L , a n d 4 L . T h e r e f e r e n c e 1 e v e 1o f c o m p a r a t o r i s g i v e n f r o m t h e t h r e s h o l d c i r c u i t . T h e t h r e s h o l d i s d e e pi n s h o r t r a n g e w h l 1 e s h a l l o w i n l o n g r a n g e , S o L h a t t h e n o i s e d e n s i t i yo n t h e s c r e e n b e c o m e s u n i f o r r n . T h e L h r e s h o l d l e v e 1 i s a d j u s t e d b y V R 4I T H R E S H O L D ] , 3 s w e l l a s c o n t r o l l e d b y s i g n a l s T H O , T H 1 , T H z , a n d T H 3s e n t f r o m C P U . T h e d i g i t a l z e d v i d e o s i g n a l s , D V 2 , D V 6 , a n d D V 7 a r esampled by 77 .673 Nf r fz h igh f requency sampl ing c i rcu l t composed o f IC6X,6 Y , a n d 6 2 . T h e o u t p u t o f t h e s e c i r c u i t s i s s e n t t o t h e s a m p l i n g c i r c u i tof the radar LSI KCD-24.

( b ) R a d a r L S I ( K C D - 2 4 , I C T T )

The app l i ca t ion spec i f i ed IC (ASIC) radar LS I KCD-24 ( IC7V) i s con t ro l -1ed by the CPU through data bus. The radar LSI conta ins major radar s1g-na1 p rocess ing c i r cu i t s as l i s ted be1ow.

S a m p l i n g c i r c u i t a n d s a m p l i n g c l o c k d i v i d e rH igh speed bu f fe r memor j -esI n t e r f e r e n c e r e j e c t i o n c i r c u i tPo la r to X-Y coord ina tes conver te rCRT dr ive cont ro lOthers

F i e . 2 . 2 . 2 . 9 i l l u s t r a t e s t h e b l o c k d i a g r a m o f r a d a r L S I K C D - 2 4 .

ControiQ 2 , 3 , 4 0

ControlQ 8 - 1 0 ,D 5 , I C l L

Conlro lQ 3 9 , D 1 0

2-r 4 MD-32L0 / 3220 Serv ice Manual-O1

D i v i d e r

Z n d B u f f e rl ' Iemo ryS a m p l i n g

1 s t B u f f e rM e m o r y

B u f f e rl ' |emo ryContro I

r- O lo X-YCoordinatesConverter

AddressS e l e c t o r

H o r i z o n t a lAddressCounter

V e r t i c a lAddressCounter

CKI F'

EXCK

SSTDV7u v oDV2

nDnn

VCK

DV0-DV? to1st Buffe

t"rl5tfiiirl: vzzz %z%AFig. 2.2 .z.LO Data Transf er Tining in ISI

I ' lD-32 LO / 3220 Service Manual-0l

Con Lro Is i g n a l s

Fig. 2.2.2.9 Block Diagram of Radar LSI KCD-24

F l o w o f s i g n a l s i n r a d a r p r o c e s s i n g o p e r a t i o n i s e x p l a i n e d a s f o 1 l o w s .

i ) S a m p l i n g

T h e d i q i t a l r a d a r v i d e o s i g n a l s D V z , D V 6 , a n d D V 7 s a m p l e d 1 n t h e h i g h

f requency sampl ing ICs IC6X, 6Y, and 6Z are fu r ther sampled in the

L S I , s t a r t i n g a t t h e l e a d i n g e d g e o f S S T t i m i n g p u l s e . N u r n b e r o f t h e

samples per one radar s \^ /eep is se t to 800 cons tan t by CPU. Because

t h e r a d a r s w e e p p e r i o d d i f f e r s a c c o r d i n g t o r a n g e s c a 1 e , t h e s a m p l i n g

f r e q u e n c y i s d e t e r m i n e d b y t h e s e l e c t e d r a n g e . T h e r e f e r e n c e s i g n a lf o r s a m p l i n g c l o c k p u l s e i s g e n e r a t e d b y t h e 7 7 . 6 7 3 M H z o s c i l l a t o r( Y 1 ) , d i v i d e d b y I C 7 Z , 7 Y , a n d 7 X , t h e n f e d t o L S I a s C K I F a t I C T T -

1 . C K I F i s d i v i d e d w i t h i n t h e L S I t o m a k e c o r r e c t s a m p l i n g i n t e r v a l s

in accordance w i th the se lec- ted radar range.

i i ) H i g h s p e e d b u f f e r m e m o r i e s

T h e s a m p l e d r a d a r v i d e o s i g n a l i s c o n v e r t e d t o 8 - b i t p a r a 1 l e 1 d a t a

a n d w r i t t e n i n t o t h e l s t b u f f e r m e m o r y . T h e m e m o r y h a s a c a p a c i t y f o r

ho ld ing two sweeps v ideo da ta . The memory area is a l te red a t the t i rn -

i n g o f t r a n s m i t t i n g t r i g g e r ( S S T ) . W h e n o n e c y c l e o f 8 0 0 b i t s s a m p l -

i n g i s c o m p l e t e d , t h e d a t a i s i m m e d i a t e l y t r a n s f e r r e d t o t h e Z n d b u f -

f e r m e m o r y . W h e n t h e i n t e r f e r e n c e r e j e c t i o n ( I R ) i s t u r n e d o t r , t w o

s \ { e e p d a t a m e m o r i e s a r e s i m u l t a n e o u s l y r e a d , c o r r e l a t e d , a n d t h e nwr i t ten in to the Znd bu f fe r . The radar v ideo is de l i vered f rom the2 n d b u f f e r m e m o r y a s d i g i t a l s i g n a l s , G D O t o G D z . F i g . 2 . 2 . 2 . I 0 s h o w s

the t im ins char t o f da ta t rans fer in LSI .

SST ( TC7T-2)

GDO-GD2

x0, x1

KO-K7

2 - r 5

i i i ) C o o r d i n a t e s c o n v e r s i o n

Memory t rans fer f rom the 2nd bu f fe r Lo the radar v ideo RAM is s ta r t -ed by the cont ro l pu lse AZI made o f AZP, the re fo rmed pu lse o f AZI |s e n t f r o m t h e a n t e n n a u n i t . ( R e f e r t o F i g . 2 . 2 . 2 . 2 D a t a T r a n s f e r r i n gT i m i n g C h a r t . ) W h e n t h e d a t a i s L r a n s f e r r e d , a d d r e s s o f t h e r a d a r v i ld e o R A M i s p r o d u c e d b y t h e c o o r d i n a t e s c o n v e r t e r . T h a t i s , t h e p o l a rc o o r d i n a t e s o f e a c h b i t r a d a r v i d e o i s c o n v e r t e d i n t o X - Y a d d r e s s r e -fe r r ing the s ine /cos ine da ta se t by CPU a t every AZI t im ing . The X-ya d d r e s s c o d e s X 0 , X 1 , a n d K 0 t h r o u g h K 7 a r e d e l i v e r e d f r o m L S I . T h ed a t a i s t r a n s f e r r e d b i t b y b i t 1 n 2 0 6 n s i n t e r v a l s , B t l m e s l o n g e rp e r i o d o f C R C O c l o c k i n t e r v a l s . F i g . 2 . 2 . 2 . 1 I s h o w s t h e t i m i n g c h a r to f d a t a t r a n s f e r f r o m L S I L o r a d a r v i d e o R A M .

AZI (IC7T-59)

2nd Buffer tov ideos lsv%i77,v7v,%v, ,%v7.v777,777777V%i777,777V,%V%,

INT ( IC7T-43)

Fig . 2 .2 .2 .L r Data Trans fer T iming f rom LSr ro VRAM

i u ) R a d a r v i d e o R A M a n d p e r i p h e r a l c i r c u i t s

S i x c h i p s o f 1 M - b i t d u a l p o r t R A M ( 1 P D 4 2 2 7 4 V , I C T F r o 7 H , 7 J r o 7 L )a r e p r o v i d e d f o r r a d a r r m a g e , w h i l e f o u r c h i p s o f t h e s a m e R A M ( I C 7 Bt o 7 E ) f o r t r a i l i m a g e v i d e o . A t o t a l o f I , 0 2 4 x 1 , 0 2 4 - b i t m e m o r i e sa r e a l l o c a t e d t o w h o l e C R T s c r e e n . A r n o n g t h e m , a c i r c l e w i t h 9 B O b i t sh o r i z o n t a l o r v e r t i c a l d i a m e t e r i s a s s i g n e d t o t h e r a d a r i r n a g e a r e a .I n a c o n v e n t i o n a l m e t h o d , o n e r a d a r v i d e o m e m o r y a r e a w a s d i r e c t l yu p - d a t e d r e g a r d i n g t h e e x i s t e n c e o r n o t o f t h e e c h o s i g n a l s o n t h el a t e s t p u l s e t r a n s m i s s i o n . T h i s m e t h o d h a s a d i s a d v a n t a g e t h a t t h er a d a r i n f o r m a t i o n i n t h e p i x e l s n e a r t h e s w e e p c e n t e r m a y b e r e d u c e d .T h e r e a s o n i s t h a t s u c h a p i x e l p a r t i c i p a l e s i n m a n y s w e e p s a n d i ft h e l a t e s t s w e e p d o e s n o t c o n t a i n e c h o , p r e v i o u s r e t u r n s i g n a l i n t h es a m e p i x e l i s 1 o s t . I n o r d e r t o i m p r o v e s u c h d i s a d v a n t a g e , t h e m e m o r yf o r r a d a r i m a g e i s d i v i d e d i n t o t w o g r o u p s , a n d u s e d s i m u l t a n e o u s l ya s s h o w n i n F i g . 2 . 2 . 2 . I 2 . O n e g r o u p c o n s i s t s o f I C T F , 7 H a n d 7 K ' ,w h i l e t h e o t h e r g r o u p I C 7 G , 7 J a n d 7 L . W h e n o n e 1 s w r i t i n g r a d a r e c h oimages, the o ther i s e ras ing prev ious image da ta . The s ia tus is a1-t e r e d b y S H F p u 1 s e .

S H F S H F

C o m p o s e dV i d e o0 u t p u t

Read/Write Method of Radar Video Menory

E r a s e d i n L a s ta n t e n n a r o t a t i o

Wr i te

M e m o r y o f L a s ts c a n n i n g

Memo r y M e m o r y

2-16

F i g . 2 . 2 . 2 . 1 2

f ' lD-32I0/ 322A Service Manual-O I

Two radar memor ies a re read s imu l taneous ly and composed as shown int h e d r a w i n g . I n t h i s m e t h o d , w r i t i n g a n y p i x e l d o e s n o t a f f e c t p r e -v i o u s s t o r e d m e m o r y a n d l o s l n g t a r g e t n e a r s c o p e c e n t e r i s a v o i d e d .When the radar sweep or ig in does no t co inc ide w i th the d isp lay cent -o f , f o r e x a m p l e w h e n o f f - c e n t e r i n g i s t u r n e d o f l , C P U g e n e r a l l y c a l -cu la tes appropr ia te t rans fer r ing amount o f v ideo images f rom Znd bu f -f e r t o v i d e o R A M . T h i s m e t h o d , h o w e v e r , g i v e s h e a v y d u t y t o C P U e s p e -c i a 1 1 y i n ' t r u e m o t i o n t m o d e , E S i t s h o u l d c o n t i n u o u s l y c a r r y o u ts u c h c a l c u l a t i o n s . I n t h i s r a d a r , 8 0 0 - b i t m e m o r i e s p e r o n e s w e e p a r et r a n s f e r r e d e v e r y t i m e t o t h e v i d e o R A M , c o v e r i n g f u l 1 e x t e n t o fo f f -cen ter ing image. When read ing ou t the da ta f rom RAM on the o therh a n d , t h e p o r t i o n o f m e m o r i e s o u t s i d e L h e r a d a r s c o p e a r e a i s m a s k e db y t h e C R T v i d e o c o m p o s e r . F u r t h e r m o r e , i f L S I d e l i v e r e d a n y w r o n ga d d r e s s e x c e e d i n g t h e v i d e o R A M a r e a , I C B N , B P , 6 N , a n d 6 P f u n c t i o n st o c a n c e l t h e w r i t e e n a b l e p u l s e ( W E D K ) d e r i v e d f r o m L S I I C T T - 6 4 .

v ) C R T v i d e o c o m p o s e r

F i g . 2 . 2 . 2 , I 3 s h o w s t h e b l o c k d i a g r a m o f C R T v i d e o c o m p o s e r . T h e c l r -c u i t m i x e s t h e r a d a r v i d e o a n d c h a r a c t e r v i d e o b y s y n c h r o n l z i n g t h e mw i t h t h e d o t c l o c k o c c u r i n g i n t h e s a m e t i m i n g o f C R C O . T h e r a d a r v i -d e o i r n a g e s o u L s i d e t h e e f f e c t i v e r a d a r s c o p e o f 9 6 0 - d o t d i a . c i r c l ea r e r e j e c t e d b y M A S K d a t a f e d f r o m A C R T C o f t h e l o g i c u p p e r b o a r d ,MD-3210-7000.

Radar v ideo

Character v ideo

DoL c lock (DCK)

F i g . 2 . 2 . 2 . L 3B r i l l i a n c e c o n t r o l

CRT Video Composer

When jumper JP3 IMARKER] i " se t to IEXOR] , par t o f i rnages super impos-ed w l th markers such as r lngs , EBL, and VRM becomes dark . When JP3 iss e t t o I N 0 R M ] , s u c h p a r t b e c o m e s m o r e b r i g h t . I C 4 A A a l s o a c t u a t e d b yt h e d o t c l o c k s y n c h r o n i z e s a l l t h e g a t e o u t p u t . B r i l l i a n c e o f r a d a rv i d e o i m a g e s , r n a r k e r s , t r a i l i m a g e s , a n d a l p h a - n u m e r a l l e t t e r s a r ei n d e p e n d e n t l y a d j u s t e d b y r e s p e c L i v e c o n t r o l s o n t h e c o n t r o l p a n e 1 .S i g n a l s a r e c o m b i n e d w i t h r e s p e c t i v e d a t a a L t h e d i g j - L a 1 - t o - a n a l o gc o n v e r t e r . T h e a n a l o g v o l t a g e o u L p u t o f t h e c o n v e r t e r i s a m p l i f i e di n t h e c u r r e n t a m p l i f i e r s Q 2 7 t h r o u g h Q 3 4 . C o l l e c t o r s o f t h e s e t r a n -s i s t o r s a r e c o n n e c t e d i n p a r a l l e l c o m p o s i n g a w i r e d 0 R c i r c u i t , t h u sthe h ighes t 1eve1 s igna l i s sen l to CRT fo r image presenta t ion .

i v ) T U N E c i r c u i t

U n d e r C P U c o n t r o l , t h e l o g i c l o w e r b o a r d p r o v i d e s a u t o m a t i c t u n i n gfunc t ion to supp ly the op t imum MIC tun ing vo l tage to the an tenna. Inmanua l tun ing mode, a tun ing vo l tage is manua l ly de l i vered f rom VR4

ITUNE] o f the cont ro l pane1. i {hen ITUNE] knob is tu rned to AUTO, CPUautomat ica l l y ad jus ts the tun ing vo l tage to the po in t where thetun ing meter shows max imum. In o rder to make co inc idence o f the re -ce iver op t imum tun ing po in t and tun ing meter max imum po in t , VR5 ITUNEA U T O ] i " c a r e f u l l y a d j u s t e d . I f t h e t u n i n g m e t e r r e a c h e s f u 1 1 s c a l eo r e x c e e d s t h e s c a 1 e , A U T O T U N E d o e s n o t f u n c t i o n p r o p e r l y . I n s u c , ha case, ad jus t VR7 ITUNE MET] so tha t the tun ing meter max imum po in t

CRT V ideo0uIput

D ie i ta l -to -Ana logConverterQ27 -34

MD-32 IO / 3220 Serv ice Manua l -O1 2 - r7

becomes f rom 70 Lo BOZ o f Lhe fu11 sca1e .

2 .2 .3 Control panel (l ' lD-321O-72OO)

C o n t r o l p a n e l M D - 3 2 1 0 - 7 2 0 0 i s b u i l t i n a t i l t i n g t y p e c a s e u n i t . T h e u n i ti s c o n n e c t e d t o t h e d i s p l a y w i t h a 7 5 c m l o n g s t a n d a r d c a b 1 e . T h e u n i t c a nb e d i s m o u n t e d f r o m L h e d i s p l a y u n i t e n a b l i n g r e m o t e c o n t r o l . T h e c a b l e c a nb e e x t e n d e d u p t o f i v e m e t e r s o n o p t i o n a l o r d e r . T h e c i r c u j - t i s d i v i d e d i n -t o p a r a 1 1 e l / s e r i e s c o n v e r t e r , E B L V R M e n c o d e r l t r a c . k - b a l 1 c o n t r o l l e r , a n dc o n t r o 1 s .

( 1 ) P a r a l T e L / s e r i e s c o n v e r t e r

I C 3 , R 3 a n d C 3 c o m p o s e a n o s c i l l a t e r f o r s e r i a l s h i f t c l o c k . I C 4 i s ap r o g r a m a b l e c o u n t e r w i t h f u 1 1 c o u n t s e t t o 4 0 . f C l , I C 5 , I C 7 , I C 9 , a n dI C l 1 a r e B - b i t s h i f t r e g i s L e r s t o h o l d 4 0 b i t s o f p a n e l s w i t c h s t a t u s .W h e n a s t r o b e p u l s e i s d e l i v e r e d f r o m I C 4 # 1 5 , a l l t h e r e g i s t e r s l a t c ht h e p a n e l s w i t c h s l a t u s i n p a r a l 1 e l . T h e h e l d d a t a a r e t h e n s h i f t e d v i aI C 1 # 1 3 ( Q H ) b i t b y b i t w i t h L h e c l o c k p u l s e f r o m I C 3 # 2 . W h e n t h e f i n a l4 0 t h b i t i s d e l i v e r e d , L h e c o u n t e r r e s e l s a n d p r o d u c e s n e x t s t r o b e . T h eser ia l da ta s igna l i s sen t to Lhe log ic upper v la log ic lower fo r CPUp r o c e s s . R e f e r L o p a r a . 2 . 2 . 2 ( 1 ) ( d ) .

( 2 ) E B L V R M e n c o d e r / L r a c k - b a 1 1 c o n t r o l l e r

T h e p h a s e o f o u t p u t s i g n a l f r o m E B L / V R M e n c o d e r d i f f e r s 9 0 o b e t w e e n r o -t a t i o n s i n C W ( c l o c k w i s e ) a n d C C W ( c o u n t e r - c l o c k w i s e ) . C R c . i r c u i t s m a d eo f R 5 / 7 a n d C 4 / 5 , 3 s w e l l a s R 9 / 1 1 a n d C 6 l 7 e l i m i n a t e c h a t l e r i n g o f t h ee n c o d e r s i g n a l . T h e t r a c k - b a 1 1 i s p r o v i d e d w l t h a b u i l l - i n c h a t t e r i n ge l i m i n a t o r . T h e s i g n a l s r e f o r m e d i n I C B a r e f e d t o C W / C C W d e t e c t o r I C 1 0 .CI , { o r CC\ , { o f t rack-ba11 is de tec ted by IC6. CW/CCW s igna l and encoderp u l s e o u t p u t a r e s e n L t o p a r a l l e l / s e r i a l c o n v e r t e r I C 1 1 . W a v e f o r m s o ft h o s e s i g n a l s a r e s h o w n i n F i g . 2 . 2 . 3 .

rc1 0-1 2

rc10-11 -

rc10-9

Ctl Rotat ion CCtl Rotat i on

Fig. 2.2.3 EBL/VRM Encoder Waveforms( 3 ) C o n t r o l s

V R l ( G A I N ) , V R 2 ( S T C ) , a n d V R 3 ( F T C ) a r e p r o v i d e d t o c o n t r o l t h ef i ca t ion o f the ana log s igna l c i r cu i t o f l og ic lower board . VR3vided wi th FTC 0N/0FF swi tch. The vol tage f rorn VR4 (TUNE) is sentMIC o f an tenna un i t fo r va ry ing the 1oca1 osc i l l a t i on f requencyta in f ine tunlng point . When the contro l is turned fu1ly CC\I I to(au tomat i c tun ing ) pos i t i on , the s ta tus i s fed to IC7 # I4 to bethe CPU o f l og ic upper . VR5 (NUMERIC) , VR6 (PLOT) , VR7 (MARKER) ,(V IDE0) con t ro l the b r i l l i ance o f respec t l ve v ideo s igna ls . Theis not turned to complete dark as the min imum 1eve1 is l imi ted by

(4 ) La rnp con t ro l

Qi contro ls the br i l l iance of lamps f rom DSl through DS6 wi th thesen t f rom CPU v ia J720 I # I4 (D IMMER) .

ampl i -i s p r o -

to theto ob-A . TUNE

sent toand VR8

markerR l 2 .

s ignal

2 _ I B MD-32 I0 / 3220 Serv ice Manual-O1

becomes f rom 70 to BO% of Lhe fu l l sca1e.

2.2.3 Control panel ( I '1D-321O-72OO)

C o n t r o l p a n e l M D - 3 2 1 0 - 7 2 0 0 i s b u i l t i n a t i l t i n g t y p e c a s e u n i t . T h e u n i ti s c o n n e c t e d t o t h e d i s p l a y w l t h a 7 5 c m l o n g s t a n d a r d c a b 1 e . T h e u n i t c a nb e d i s m o u n t e d f r o m L h e d i s p l a y u n i t e n a b l i n g r e m o t e c o n t r o l . T h e c a b l e c a nb e e x t e n d e d u p t o f i v e m e t e r s o n o p t i o n a l o r d e r . T h e c i r c u i t i s d i v i d e d l n -t o p a r a 1 1 e 1 / s e r i e s c o n v e r t e r , E B L V R M e n c o d e r / t r a c k - b a l 1 c o n l r o l l e r , a n dc o n t r o l s .

( 1 ) P a r a 1 1 e l / s e r i e s c o n v e r t e r

I C 3 , R 3 a n d C 3 c o m p o s e a n o s c i l l a t e r f o r s e r l a l s h i f t c 1 o c k . I C 4 i s ap r o g r a m a b l e c o u n t e r w i l h f u l 1 c o u n t s e L t o 4 0 . I C l , I C 5 , I C 7 , I C 9 , a n dI C l 1 a r e 8 - b i t s h i f t r e g i s l e r s t o h o l d 4 0 b i t s o f p a n e l s w i t c h s t a t u s .W h e n a s t r o b e p u l s e i s d e l i v e r e d f r o m I C 4 # 1 5 , a l l t h e r e g i s L e r s l a t c ht h e p a n e l s w i t c h s t a t u s l n p a r a 1 1 e l . T h e h e l d d a t a a r e t h e n s h i f t e d v l aI C l # I 3 ( Q H ) b i t b y b i t w i t h t h e c l o c k p u l s e f r o m I C 3 # 2 . W h e n t h e f i n a l4 0 t h b i t i s d e l i v e r e d , t h e c o u n l e r r e s e t s a n d p r o d u c e s n e x t s t r o b e . T h eser ia l da ta s igna l i s sen t to L i re log ic upper v ia log ic lower fo r CPUp r o c . e s s . R e f e r t o p a r a . 2 . 2 . 2 ( 1 ) ( d ) .

( 2 ) E B L V R M e n c o d e r / L r a c k - b a 1 1 c o n t r o l l e r

T h e p h a s e o f o u L p u t s i g n a l f r o m E B L / V R M e n c o d e r d i f f e r s 9 0 o b e t w e e n r o -t a t i o n s i n C W ( c l o c k w i s e ) a n d C C W ( c o u n t e r - c l o c k w i s e ) . C R c i r c u i t s m a d eo f R 5 / 7 a n d C 4 / 5 , 3 s w e l l a s R 9 / 1 1 a n d C 6 / 7 e l i m i n a t e c h a t l e r l n g o f t h ee n c o d e r s i g n a l . T h e t r a c k - b a l 1 i s p r o v i d e d w i t h a b u i l l - i n c h a t t e r i n ge l i m l n a t o r . T h e s i g n a l s r e f o r m e d i n I C B a r e f e d t o C W / C C W d e t e c t o r I C 1 0 .C W o r C C W o f L r a c k - b a 1 1 i s d e t e c t e d b y I C 6 . C W / C C W s i g n a l a n d e n c o d e rp u l s e o u t p u t a r e s e n t t o p a r a 1 1 e 1 / s e r i a l c o n v e r t e r I C 1 1 . W a v e f o r m s o ft h o s e s i g n a l s a r e s h o w n i n F i g . 2 . 2 . 3 .

rc10-1 2

r c10-11 -

rc10-9

Cl l Rotat ion CCI Ro ta t i on

Fig. 2.2.3 EBL/VRM Encoder Waveforms( 3 ) C o n t r o l s

V R 1 ( G A I N ) , V R 2 ( S T C ) , a n d V R 3 ( F T C ) a r e p r o v i d e d t o c o n t r o l t h ef i ca t ion o f the ana log s igna l c i r cu i t o f l og ic lower board . VR3vided wi th FTC 0N/0FF swiLch. The vol tage f rom VR4 (TUUE) is sentMIC o f an tenna un i l f o r va ry ing the 1oca l osc i l l a t i on f requencyta in f i ne tun lng po in t . When the con t ro l i s tu rned fu1 ly CCW Lo(au tomat i c tun ing ) pos i t i on , the s ta tus i s fed to IC7 # I4 to bethe CPU o f l og ic upper . VR5 (NUMERIC) , VR6 (PL0T) , VR7 (MARKER) ,(V IDEO) con t ro l the b r i l l i ance o f respec t i ve v ideo s igna ls . Theis not turned to complete dark as the min imum 1eve1 is l iml ted by

(4 ) Lamp con t ro l

Q1 con t ro ls the b r i l l i ance o f l amps f rom DSI th rough DS6 w l th thesent f rom CPU v ia J72OI #14 (DI I ' tv lER).

amp l i -i s p ro -

to theto ob-A . TUNE

sent toand VRB

markerR 1 2 .

s ignal

2 _ I B MD-32 I0 / 3220 Serv lce Manual-0 l

3 . ADJUST},IENT

C A U T I O N S

(1) H igh vo l tages a re app l ied to the an tenna and d isp lay un i t s .(2 ) Sh ip ' s ma ins supp ly i s app l ied to a ce r ta in in te rna l un i t even when the

power i s tu rned o f f .(3 ) Con f i rm tha t the ra ted fuses a re used accord ing to the sh ip rs ma ins .(4) Preheat magnetron in STANDBY more than 30 minutes, for the f i rs t t i rne

tu rn ing the power on a f te r i ns ta l l a t ion , o r magne t ron j - s rep laced .(5 ) Be fo re ad jus tment , a11ow the equ ipment abou t 30 m inu tes in the t rans -

mi t t i ng cond i t i on .

3. 1 Location of Controls

Ad jus t ing con t ro ls and sw i tches a re loca ted on log ic upper (MD-3210-7000)and log ic lower (MD-32I0-7 i00) boards mounted r ight hand ins ide the d isp layu n l t a s s h o w n i n F l g . 3 . 1 . B y r e m o v i n g f o u r t e e n ( 1 4 ) f i x i n g s c r e w s , t h ed isp lay cover can be removed to access these con t ro ls and sw i tches .

L o g i c u p p e r( N D - 3 2 1 0 - 7 0 0 0 )

L o g ' i c L o w e r(MD-321 0 -71 00 )

D I P s w i t c h

si.J2) w l

stJ3

V R 1 O( P . R . F . )

V R 1( V I D E O I N )

V R 3

VR2( L E V E L )

S t l 2 V R 4 ( T I M E )

V R 5 ( T H R E S H O L D )

V R 7 V R 6 ( A U T O )VR9 VR8 ( I ' IETER ) (MANUAL)( C O N T R A S T ) ( T X D E L A Y )

Fig. 3.1 Location of Controls and Switches

3.2 Adjustnent After Installation

I M P O R T A N T

Af te r ins ta l la t ion , do no t fa i l to rnake in i t ia l ad jus tment o f con t ro ls asm e n t i o n e d b e 1 o w .

3 . 2 . L T u n i n g

MD-32I0/3220 is prov ided wi th automat ic tun ing fac i l i ty . When TUNE contro lis turned fu l1y counter-c lockwise to AUTO posi t ion, the image gain shouldbe maximum as presented in manual tun ing mode set at the maximum point byTUNE con t ro l . I f AUTO tun ing op t imum po in t i s abnorma l , ca r ry ou t fo l l ow ingad jus tment in o rder .

MD-32I0/3220 Serv ice Manual-O1 3-1

AU

1) Wi th RANGE k"y , se lec t 24 nm (1ong pu lse ) range .2) Set the pointer of TIINE control on the control panel at

the cen te r pos i t i on as shown 1e f t .3) S1ow1y turn VR6 (MANUAL) of MD-3210-7100 to the point

where ta rge ts a re mos t s t rong ly v i s ib le on the sc reen .(+25 t1V a t p in #3 o f the rea r pane l connec to r J6005)

4) Adjust VR5 (AmO) so that the tuning meter shows maximumind ica t ion . (+5 t0 .5V a t p in #9 o f the rea r pane l con-nec to r J6006)

5) I f the tuning meter l ights up a l l the way and the rnaxi -mum point cannot be d iscr iminated, sd just VR7 ( l " lETER) sothat the maximum indicaLion becomes about 807" of fu11s c a l e , t h e n r e p e a t s t e p ( 4 ) .

(noise level )3 .2 .2 Prese t ga in

Th is ad jus tment i s requ i red to c lea r l y d i sp lay re la t i ve ly sma11 ta rge ts .

(1 ) Ro ta te GAIN con t ro l o f the con t ro l pane l fu11y c lockw ise .(2) Rotate STC, FIC and l l l i lE contro ls fu11y counter-c lockwise.(3) Wi th RANGE kuy, se lect the maximum range.(4) Turn IR.EXP and PI IOT of f wi th respect ive contro l keys.(5) Adjust VR4 (THRESH0LD) of MD-3210-7100 so that noise speckle becomes

j u s t v i s i b l e .

3 . 2 . 3 S T C

Rotate FI IC and TUNE contro ls fu11y counter-c lockwise.Turn IR.EXP and PLOT of f wi th respect ive contro l keys.With RANGE k"y, se lect L2 nm range.Ro ta te GAIN con t ro l o f the con t ro l pane l fu l l y c lockw ise .Rotate STC contro l so that noj -se speckles are suppressed up to 6 Df l ,and a few s t rong echoes rema in near cen te r o f the sc reen .

I f ad jus tment (5 ) above i s d i f f i cu l t caused by excess ive images , take fo1 -low ing s teps :

(5 ) Ro ta te STC con t ro l fu11y c lockw ise .(6) Adjust VR3 (THE) and VR2 (LEVEL) of log ic lower I '1D-3210-7100 as below.

(a) Set RANGE to 0.25 nm and adjust VR3 f rom c lockwise to counter-c1ock-w ise , so tha t the s ta r t i ng po in t o f STC becomes the cen te r o f sc reen .

(b) Set RANGE to 12 nm and adjust VR2 so that noise is suppressed up to6 nm on the sc reen .

T U N E^A

'/4 S-'- . / / \ z

(( \_

T O

3.2.4 Tr igger delay

I f the image of a s t ra ight target , such asbe low, i t rnay be caused by improper t r i ggero f an tenna cab le .

( 1 )( 2 )( 3 )( 4 )( s )

breakwater i s de formed as shownd e 1 a y , a c c o r d i n g t o t h e l e n g t h

N o r m a L E x c e s s i v e d e L a yS h o r t d e L a y

3-2 I 'D-32I0/ 3220 Serv ice Manual-O1

I n such a case , ad jus tment i s made as fo l l ows :

( 1 ) W i t h R A N G E k e y , s e l e c t 0 . 2 5 n m .(2) Adjust VR6 (TX DELAY) of MD-3210-7100 so that

becomes norma l as fo1 lows .( a ) T h e s t r a i g h t t a r g e t s a r e c o r r e c t l y p r e s e n t e d .(b ) A ta rge t w i th known d is tance 1s p resen ted a t

VRM f or range measurernent .

the image on the screen

c o r r e c t p o s i t i o n . U s e

3 .2 .5 SI{F and bearing

A f t e r i n s t a l l a t i o n a d j u s t m e n t s m e n t i o n e d a b o v e a r e c o m p l e t e d , c o n f i r m S H Fa n d a d j u s t b e a r i n g , i f n e c e s s a r y , a s f o 1 1 o w s .

( 1 ) W h e n t h e s h i p i s m o o r i n g o r c a l r n l y a n c h o r i n g , f i n d s o m e s t a t i o n a r y v i s -i b l e t a r g e t s i n a d i s t a n c e o f 4 t o B n m .

( 2 ) M e a s u r e t h e b e a r i n g o f t a r g e t s o n t h e c o m p a s s a s w e l l a s o n t h e r a d a rs c r e e n . I f t h e r a d a r b e a r i n g d e v i a t e s m o r e t h a n + 1 o f r o m t h e c o m p a s sb e a r i n g , c o r r e c t i o n c a n b e m a d e a s b e 1 o w .

( 3 ) B e a r i n g e r r o r w i t h i n + 1 1 " c a n b e c o r r e c t e d t o t l o b y r o t a r y s w i t c h e sS W 2 ( c o a r s e ) a n d S W l ( f i n e ) o f M D - 3 2 1 0 - 7 1 0 0 . I f e r r o r i s m o r e L h a n+ 1 1 o , f u r t h e r + 5 o a d j u s t a b l e r a n g e i s p r o v i d e d i n t h e a n t e n n a u n l t .

( 4 ) B e a r i n g a d j u s t r n e n t i n a n t e n n a u n i t i s m a d e a s f o l l o w s :f ) F i r s t o f a l l , n o t e t h a t i m a g e s a r e

L o b e r o t a L e d c l o c k w i s e ( C W ) o rcounter -c lockwise ( CCW) f o r cor -r e c t i n g e r r o r .

i f ) T u r n o f f t h e p o w e r .i i i ) O p e n t h e a n t e n n a r e a r c o v e r .

i r r ) F ind the SHF lead swi tch as showni n t h e r i g h t . L o o s e n f i x i n g s c r e w sa n d m o v e t h e b o a r d f u l 1 y l e f t w a r d sf o r CW i rnage ro ta t ion , o r r igh t -w a r d s f o r C C W r o t a t i o n .

v ) F i x t h e b o a r d w i t h f i x i n g s c r e w sa n d r e s t o r e t h e r e a r c . o v e r . T u r no n t h e p o w e r a n d t r a n s m i l .

v i ) R e a d j u s t S W Z a n d S W l o f M D - 3 2 1 0 -7 1 0 0 s o t h a t t h e b e a r i n g e r r o rbecomes less than +1 o on thes c o p e .

N o t e : b e a r i n g e r r o r e x c e e d s + 1 6 " , c h e c ka l i g n e d w i t h t h e b o w l i n e o r n o t .

3.3 Adjustment of Antenna Unit

N o a d j u s t i n g p o i n t e x i s t s 1 n t h ef o r i n i t i a l b e a r i n g a d j u s t m e n t b y

t h e d i r e c t i o n o f a n t e n n a u n i tI f- ; ^I b

a n t e n n a f o r o r d i n a r yS H F s w i l c h m e n t i o n e d

r n a i n t e n a n c e , e x c e p Li n p a r a . 3 . 2 . 5 ,

3.4 Adjustment of Display

3 .4 .l Power supply (l 'fD-321O / 3220-6000 )

T h e p o w e r s u p p l y b o a r d i s a d j u s t e d f o r t h e s w i t c h i n g r e g u l a t o r o s c . i l l a t i n gf r e q u e n c y , + 1 0 0 V o u t p u t 1 e v e 1 , a n d m a g n e t r o n h e a t e r v o l l a g e . A d j u s t m e n t

SIIF switch

MD-32 I0 / 3220 Serv ice Manua l -O l J _ J

i s m a d e a s f o l l o w i n g p r o c e d u r e . A c c e s s t o t h e b o a r d c a n b e m a d e b y d i s a s -s e m b l i n g t h e r e a r p a n e l o f t h e d l s p l a y . F i g . 3 . 4 . 1 i l l u s t r a t e s t h e l o c a t i o no f m e a s u r i n g / a d j u s L i n g p o l n t s o f p o w e r s u p p l y b o a r d .

( 1 ) O s c i l l a t i n g f r e q u e n c y

(a ) Wi th RANGE key , se lec t 24 nm range .(b ) Connec t a f requency coun te r be tween IC3 p in #9 [E1 ] and #7 [DC( - ) o f

i n p u t l i n e ] .( . ) Adjust VRI so Lhat the f requency becomes 35 tO.5 kLlz .

(2 ) 100 V ou tpu t vo l tage

(a ) Connec t a DC vo l tmete rTP3 and TP6 (GND) .

(b ) Ad jus t VR3 so tha t the

(3 ) Magne t ron hea te r cu r ren t

(a ) Connec t a DC vo l tmete r o r c i r cu i t tes te rT P 4 a n d T P 5 t ( - ) s i d e l .

(b ) Ad jus t VR4 so tha t the vo l tage becomes asM D - 3 2 1 0 : + 1 . 8 7 t 0 . 1 9 VM D - 3 2 2 0 : + I . 7 7 t 0 . 1 8 V

V R 4 T P 4

r c3

VR1

or c i r cu i t tes te r measurab le 150 V DC. be tween

vo l tage becomes +100 tO .1 V .

rneasurable 3 V DC, between

f o l l o w s :

TP6

V R 3 TP3

3 . 4 . r

R 5 4

Measuring/aaiusting Points of Power Supply

3-4

Fig.

I " lD-32I0 / 3220 Serv ice Manual-Ol

I

ti

3.4.2 Logic upper (MD-3210-7000)

As shown in F ig . 3 .1 , th ree D IP sw i tches , SWI th rough SW3 are mounted onthe log ic upper board (MD-3210-7000) in o rder to p rese t the opera t ion o fequ ipment . Func t ions se t by those sw i tches and the i r s tandard se t t i ngs a rel i s t e d i n p a r a . 1 . 5 . 2 .

3.4.3 Logic lower (1.{D-3210-710O)

Ad jus t ing con t ro ls and sw i tches o f l og ic lower board (MD-3210-7100) a re i1 -l u s t r a t e d i n F i g . 3 . 1 . M o s t o f t h e a d j u s t m e n t s s h o u l d b e c a r r i e d o u t j u s ta f t e r i n s t a l l a t i o n , w h i c h a r e e x p l a l n e d i n p a r a . 3 . 2 .

( i ) P u l s e r e p e t i t l o n f r e q u e n c y ( P R F )

The pu lse repe t i t i on f requency (PRF) ad jus tment i s made as fo11ows.

(a) Wi th the funct ion swi tch set at STANDBY, connect a f requency counterto TP3.

(b) Adjust VR10 (PRF) so that the f requency becomes 6,000 +50 Hz.

( 2 ) T u n i n g

R e f e r t o p a r a . 3 . 2 . I .

(3 ) V ideo inpu t 1eve l

In o rder to op t im ize the e f fec t o f STC, FTC and ga ln con t ro l , the inpu tleve l o f v ideo s igna l f rom the IF un i t i s ad jus ted as fo l l ows :

( " ) C o n n e c t a n o s c i l l o s c o p e t o T P 6 ( b a s e o f Q 2 ) .(b ) Synchorn j -ze the osc i l l oscope to the pos l t i ve phase radar t r i gger .( . ) Tu rn the radar to t ransmiss ion and observe the v ideo inpu t s igna l .

Adjust VRl so that the input s ignal 1evel becomes 2 Vp-p.

( 4 ) P r e s e t g a i n ( n o i s e l e v e l )

R e f e r t o p a r a . 3 . 2 . 2 .

(s) src

R e f e r t o p a r a . 3 . 2 . 3 .

( 6 ) T r i g g e r d e l a y

R e f e r t o p a r a . 3 . 2 . 4 .

(7 ) SHF and bear ing

R e f e r t o p a r a . 3 . 2 . 5 .

(B) Jumper p in se t t i ng

In o rder to se t opera t iona l cond i t i ons o f the un i t , f i ve ju rnper p insare prov ided on the log ic lower board (FfD-32I0-7 100) . Funct ions andi n i t i a l s e t t i n g s t a t u s o f t h o s e p i n s a r e e x p l a i n e d 1 n p a r a . 1 . 5 . 1 .

l'

MD-32I0 / 3220 Serv ice Manual-Ol 3-5

3.4.4 CRT unit (PWD-1050A/PI{D-1051A)

T h e C R T u n i t a d j u s t m e n t i s r o u g h l y d i v i d e d i n t o f o u r c a t e g o r i e s , i . e . s y n -c h r o n i z a t i o n , p i - c t u r e s i z e , b r i l l i a n c e , a n d f o c u s . A s t h e C R T u n i L a p p l i e se x t r a h i g h t e n s i o n , e x t r e r n e c a r e s h o u l d b e t a k e n w h e n a d j u s t i n g c o n t r o l s .

( 1 ) A c c e s s t o c o n t r o l s

( a ) R e m o v e a l l t h e f i x i n g s c r e w s o f t h e( b ) A t t h e b o t t o m o f d i s p l u y , t h e m a i n( c ) F i n d v a r i o u s c o n t r o l s a s s h o w n i n

[H.WIDf i I ] . PWD-I051A is mounted on

d isp lay cover and open i t .board PWD-1050A can be seen.F i g . 3 . 4 . 4 . L . A l s o f i n d c o i l L A O 2the CRT socke t .

F i g . 3 . 4 . 4 . I

( 2 ) A d j u s t m e n t

Location of Controls on CRT Main Board

(a ) Turn 0N the radar t ransmi t te r ,af ter 3 minutes STANDBY.

(b ) D isp lay some le t te rs o r sym-bols at four corners of theCRT, w i th EBL, VRM, (o r anyo ther symbo l ) , and ENTER keys .

( . ) S1ow1y ro ta te R455 [G l .ADJ ] toshow back raster on the CRT.

(d ) By ad jus t ing R451 [H .PHASE] ,make the spaces at le f t andr igh t edges o f back ras te requal to each other as showni n F i g . 3 . 4 . 4 . 2 .

(e) By L4OZ [H.WIDTI I ] , ad just thewidth of back raster to a lmostfu11 o f the CRT scope .

Fig. 3 .4.4.2 Back Raster

MD-32I0 / 3220 Serv ice Manual-O1

R sztE:FOml R3sl- tT:EO-tE

R4s1tE:ffiEl @ @ grrP=*-r

R3s4 rs.eoffil aL4O2 IIT:ETtrMI

R3s3 rT-In@l

R2 5l- IEm:ddml

@

^R3ss |v:eEFF-l?)

@"nss [Gr:m'JllEeus-l

FlybackTilansf oriner

3-6

( f ) B y a d j u s t i n g R 3 5 3 [ V . L I N ] , m a k e t h e s i z e o f t o p l e t t e r e s 0 0 0 a n d b o t -t o m l e t t e r s 1 8 0 o f t h e b e a r i n g s c a l e e q u a l t o e a c h o t h e r .

( o ) A l i o n t r ^ r s m a g n e t r i n g s a r o u n d t h e C R T n e c k o n a l i n e a l o n g w h i c h t h e\ o /

c e n t e r o f b a c k r a s t e r i s w a n t e d t o m o v e , o s s h o w n i n F i g . 3 . 4 . 4 . 3 .B y n a n i p u l a t i n g t w o m a g n e t s c a r e f u l l y , s h i f t t h e b a c k r a s t e r t o t h ec e n t e r o f C R T , s o t h a t t o p / b o t t o m a n d l e f r / r i g h t g a p s b e t w e e n C R T a n dr a s t e r a r e b a l a n c e d . A l s o a d j u s t R 3 5 5 [ V . C E N T ] , i f n e c e s s a r y . A f t e ra d j u s t m e n t , f i x t h e r n a g n e t s w i t h s i l i c o n r u b b e r o r t h e 1 i k e .

F ig . 3 .4 .4 .3 Back Ras te r Cen te r ing

( h ) v e r l i c a l d i a m e t e r o f t h e r a d a r. I f u p p e r a n d l o w e r r a d i i a r e) , a d S u s L R 3 5 3 [ V . L I N l r o m a k e

a s s h o i v n i n F i g . 3 . 4 . 4 . 4 ( b ) ,

a > a > b >( a ) ( b )

Fig. 3 .4.4.4 Abnornal L inear i l ty

( j ) I f Lhe d isp lay a t co rner o f the ras te r i s de fo rmed as shown in F ig .3 . 4 . 4 . 5 ( u ) , c o r r e c t i t b y r o t a t i n g m a g n e t s m o u n t e d a t f o u r . o r n . i "o f t h e d e f l e c t i o n y o k e a s s h o w n i n F i g . 3 . 4 . 4 . 5 ( b ) .

(k) Rotate R251 [SUB.CONT] fu11y counter-c lockwise to obta in rhe maximumcont ras t , and then s1ow1y lower the b r igh tness o f back ras te r w i thR455 [G l .ADJ ] so tha t the back ras te r has jus t become inv is ib le .

( r )

\ i i L h R 3 5 2 [ V . S I Z E ] c o n r r o l , s d j u s L L h es c o p e c i r c l e t o 2 7 4 t 2 m m ( 2 0 r n c h e s )u n b a l a n c e d a s s h o w n i n F . g . 3 . \ . 4 . ! ( ac o r r e c t m a r k e r r i n g s r n r e a l c i r c l e s .I f t h e l i n e a r i t y o n r a d i u s i s a b n o r m a lc o r r e c t i t b y R 3 5 4 [ S . C O R R E ] .

Magnet

Vl l

, / i

I

IIII

MD-32L0/3220 Serv ice Manual-O1 3-7

E -#?i+sr--I t

Magnet

( a )

F ig . 3 .4 .4 .5 Corner D isp lay

(1 ) Ad jus t [F0CUS] con t ro l ( so rne un i t may beback t rans fo rmer to ob ta in f i ne focus o f

( b )

Alignrnent

marked I SCREEN] ) on the f 1r ' -t h e p i c t u r e o n t h e C R T . i

3-B MD-32I0/ 3220 Serv ice Manual-O1

4. IIIAVEFORMS

4.I Antenna Unit

4.1. I I ' [RT-133 (t[D-3210)

( 1 ) H V

( a )

shor t pu lse (SP)

Modulator 239U52236

E5: TX t r i gger

X s c a l e : 5 0 0 n s e c / d t uY s c a l e : 5 Y / d i v

(b ) Pu lse t rans fo rmer T1

P in #6 (YEL) : SP to magne t ron

X s c a l e : 5 0 0 n s e c / d l vY s c a l e : 2 , 0 0 0 V / d i v

( 2 ) H V l o n g p u l s e ( L P )

(a) Modulator 239U52236

E 5 : T X t r i g g e r

X s c a l e : 5 0 0 n s e c / d t vY s c a l e : 5 V / d i v

(b ) Pu lse t rans fo rmer T1

P in #6 (YEL) : LP to magne t ron

X sca le : 500 nsec /d iuY s c a l e : 2 , 0 0 0 V / d i v

(3 ) HV charg ing wave fo rm

(u) Modulator 239U52236

E 5 : T X t r i g g e r

X s c a l e : 1 0 0 u s e c / d i vY s c a l e : 5 V / d i v

(c) Modulator 239U52236

E 6 : H . V . c h a r g l n g

(4 ) AZr

( d )

X s c a l e : 1 0 0 u s e c / d : - vY s c a l e : 2 0 0 V / d i v

p u l s e

Scanner connect ion (S CON)

E3: AZI input

X s c a l e : 2 m s e c / d t uY s c a l e : 5 V / d i v

Scanner connect ion (S CON)

E4: AZI output

X s c a l e : 2 m s e c / a : - vY s c a l e : 5 V / d i v

O V

O V

O V

O V

( e )

e \\ -r

LI

Itl

\\

i-

IIL- /

||

_l iIL__ IL

7 {T

/

/ /

I l t

MD-32I0/3220 Serv ice Manual-01 4-r

Checklng points

--JF ctc

2236 Y3

1 n t . t l t n t \ oI F I F I F I F

1 " f 1 " fT I T It t t lL5 L6 L7 LE

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l . l 0 D 239U5

i"I

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l " l " l "l r lT T Tt t lt t l

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F i g . 4 . 1 . I . 1

{F-

II.I JAPAI{

( a )

l0 kW Type Modulator

PtI-SETRANSFMTERT1

2 4 T 1 2 2 0 9 8

( b )

3.lo-.u, 33o-",, RtHvR-3Hz t-ivl-?Hz \4,

ISKI{ TYPEH S F I 4 ? 5 8

Pulse Transformerof 10 kW TR Unit

( e ) ( d )

F i g . 4 . 1 . 1 . 3F i g . 4 . I . I . 2

frfrnnR 1 5

. l Q10

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L9_=/TTL

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Scanner ConnectionBoard (S CON)

J I

+ 'I rl i ':r

FtrDI"LATORU210 KId TYPE?39U522368

h

6 €!r

s333T C O G J -

trJ lrJ LrJ t!

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4-2 MD-32I0 / 3220 Serv ice Manual-O1

2 I'IRT-134 (l'lD-3220)

HV shor t pu lse (SP)

(a) Modulator 229U2536L

E5: TX t r i gger

(b ) Pu lse t rans fo rmer T1

P in #6 (YEL) : SP to magne t ron

(2 ) HV long pu lse (LP)

(u) Modulator 229U2536I

E5 : TX t r i gger

(b ) Pu lse t rans fo rmer T1

P in #6 (YEL) : LP to magner ron

(3 ) HV charg ing wave fo rm

(c) Modulator 229U2536I

E 6 : H . V . c h a r g i n g

(4 ) AZ I pu lse

Scanner connec t ion (S CON)

E3: AZI input & E4: AZI output

Check ing po in ts

INDULATORU2

Wavef orm is same as mT- 133 .

Waveform is similar to I"RT-133 , bu t the peak vo l tage i sa b o u t 7 . 8 k V .

Waveform is same as MRT-133.

Waveform ls s imi lar to MRT-133 , bu t the peak vo l tage i sabou t 7 .B kV

Waveform is

S e e p a r a . 4 .

W a v e f o r m i s

S e e p a r a . 4 .

same as

1 . 1 ( 3 ) .

same as

1 . 1 ( 4 ) .

MRT- 1 33

M P T 1 " ?

r r . t \ l . _ l - J J

4 . 1 .

( 1 )

F i g . 4 . l . 2 . 1 Pulse Transformerof 25 ktl TR Unit

25 kW Type Modulator

0 r 0 2f{VR- lX-408 lfvp- lX- {08

R I

lil[GluETRo[ 1?/rfr/

25rlV TYPEEi ' ,51 , R

MD-32I0/ 3220 Serv ice Manual-01

F i g . 4 . L . 2 . I

4-3

4.2 Display Uni t

4.2.1 Power suppty (MD-32f 0/?ZO-6000)

( 1 ) S w i l c h i n g w a v e f o r m

(a) Sw l tch ing t rans is to r Q1

G a L e : I n p u t

X s c a l e : 5 p s e c l d t vf s c a l e : 5 V / d i v

( b ) S w i t c h i n g L r a n s i s t o r Q l

Dra in : 0u tpu t

I s c a l e : 5 p s e c / d l _ vY s c a l e : 5 V / d i v

(2 ) T1 secondary square wave

( c ) + 5 0 V f u l l w a v e r e c t i f i e r

D9 anode : Inpu t

I sca le t l ^p : "c /d :_v

f s c a l e : 5 0 Y / d i v

( d ) S w i t c h i n g t r a n s i s t o r Q l

D l 1 a n o d e : f n p u t

X s c a l e : 5 p s e c / d l - vY s c a l e : 5 0 V / d i v

O V

O V

O V

(a ) Q l( b ) Q l

( . ) D9( d ) D l l

L_l L_.lL__l t_Ll__i Lli_J

--1II

IIIIt.

---5;

---;] --..;t - *l-- , o"l o e

r -5;I o , o

Supply

MD-321.0/ 3220 Service

r

L I ti b r f r

I t\

T I

t IF -l

l*nl_

I-l'F

4-4

F i g . 4 . 2 . 1 P o w e r

Manual-01

4.2.2 Logic upper (1.[D-3210-7000)

Signal f rom contro l panel

(u ) Da ta t rans fe r c lock

I C S E # I 2 : R C K

X sca le : 50 FSec /d iuY s c a l e : 2 V / d i v

(b ) Da ta s igna l

ICBE # I4 : PDT

X sca le : 50 psec /a t ,Y s c a l e : 2 Y / d i v

Check ing po in ts

F i g . 4 . 2 . 2

4.2.3 Logic lower (MD-32f 0-7100)

( 1 ) S y n c h r o s i g n a l s

( a ) V e r t i c a l s y n c h

T P 5 : V D

X sca le : 50 psec /d ' t uY s c a l e : 2 V / d i v

( b ) H o r i z o n t a l s y n c h

TP4: HD

X scale: 50 FSec I d : ._vY s c a l e : 2 V / d i v

MD-32I0/3220 Serv ice Manual-O1

(a) IcsE #12

r:_lt r i a r t r t r . ( l l t

z : + l - l : + f - - l) r i a l t r

7 a r ( 1 t i t r i a a i r

r r r c r t t I ) r i ( l r t

- - - r 1

t i . ( l t t t . l

t r a c r ) r t l r t i r !

7 ; , | | ^ i r r " ; ' . i c ) , , i , . " , r r \ ' r i . r ' r r r i ( ! ' . 3 l : : : i i : . 1

Logic Upper

In

lr i

a -T IT T 1I I t r n t:

llr tltl ll_U]

I-l

L

Jt tl tlIHHII ilILlJlJtJI JLIL

4-5

(3 ) V ideo inpu t f rom an tenna

( d ) T r i g g e r p u l s e

R 1 : T R I G

X s c a l e : 0 . 5 p s e c / d : vY s c a l e : 5 V / d i v

( e ) V l d e o i n p u r

Q2 base : V IDEO IN

X sca le : 0 . 5 t r r sec /d i vY s c a l e : 1 V / d i v

( 2 ) V i d e o s i g n a l L o C R T u n i t

( b ) H o r i z o n L a l s y n c h

TP4: HD

X s c a l e : 5 p s e c / d : _ vY s c a l e : 2 V / d i v

( c ) C R T v i d e o

R 1 3 2 ( J 7 1 0 5 )

X s c a l e : 5 p s e c / d i vY s c a l e : 0 . 5 V / d i v

(4) src( d ) T r i g g e r p u l s e

R 1 : T R I G

X s c a l e : 0 . 1 m s e c / A i u r vY s c a l e : 5 V / d t v

( f ) s T C

D5 ca thode : STC

X s c a l e : 0 . 1 m s e c / d l - uY s c a l e : 5 V / d i v

( 5 ) D l g i t a l v l d e o

( d ) T r i g g e r p u l s e

R 1 : T R I G

X s c a l e : 0 . 5 F S e c / d r uY s c a l e : 5 V / d i v

( g ) D i g i t a l v i d e o

IC2L #7 : DV7

X s c a l e : 0 . 5 p s e c / d t vY s c a l e : 2 Y / d t v

\

I

\f

llrll ilhrrilllr' illlnnrilllrlllhllnrllrrrl

I

L

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\

I

4-6 MD-32 I0 /3220 Serv ice Manua l -01

( 6 ) A Z I p u l s e

(h ) Az imuth inpu t pu lse

R120: AZIP

X s c a l e : 0 . 5 m s e c / d i vY s c a l e : 5 V / d i v

( i ) Mu l r ip l i ed AZI pu lse

IC6T # I3z AZI

X s c a l e : 0 . 5 m s e c / d : . vY s c a l e : 2 V / d i v

(7 ) Tans fe r s igna l f rom LSI to RAM

( b ) H o r i z o n t a l s y n c h

TP4: HD

X s c a l e : 5 p s e c / d l _ vY s c a l e : 2 V / d i v

( j ) V i d e o t r a n s f e r s i g n a l

ICBA #15 : SPLS

X scale : 5 pse c. /d tvY s c a l e : 2 V / d i - v

( 8 ) R o w a d d r e s s s e l e c t i o n

( j ) V i d e o t r a n s f e r s i g n a l

ICBA #15 : SPLS

X s c a l e : 1 0 0 n s e c / d i vY s c a l e : 2 V / d i v

( k ) R o w a d d r e s s s e l e c t i o n

ICSA #L4 : RAS

X s c a l e : 1 0 0 n s e c / d i vY s c a l e : 2 V / d i v

(9 ) V ideo RAM wr i te enab le

( j ) V i d e o t r a n s f e r s i g n a l

ICSA #15 : SPLS

X s c a l e : 1 0 0 n s e c / d t ,Y sca le : 2 V /d i -v

( * ) Wr i te enab le s igna l

ICTB IO 7L # I4Z WE

X s c a l e : 1 0 0 n s e c / d i vY s c a l e : 2 V / d i v

_l F

III IL

l-I

i

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tJ-_tJ- L

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II

IJJ LI

MD-32I0/ 3220 Serv ice Manual-Ol 4-7

5 0

Check ing po in ts

( i ) rc6T #13

(b) rP4

(a) TPs

(h ) R l20

( . ) R132

Eri.l!.!$*.. -\JPzt-, 6ii: p r [ - l r . x

rx , - \ | . i , | ' . l *v

_ &

ora*-- D+ r'

o3v-\o a E

Tv @d F

l lt ll l . l l .l l s l l :t t t lI l l l l rl n l -

l n l -

R - P Ia r^ l

T - l lt t l

t t lt t ll l e ll l r ll n l I

+ lL

q p gr-l

* l l l l - l r o: l | | l : l l :" l l l l " l l

- r - l | | l r l l - , -- l n l l n l - l n l -

t i l g , 3 5

r l l" t lr l l- l n l

3N 9m i

E r---lt l

t t t l. t t t l: t t t l" t t t l

r I I l - l- ln I

LLrr

v st lt t nt t t l

: | |t t t l- t t t t l

= l l l lt n r l n l

BB; AR 3l l r c

l l n T - ll l l l n l ll l l l ; l ll l l | - r - I Il l I n l - l . ' lH *

g !- [l t-l- r l l - l l

I t : t It t " t lI l l l Il.nj - lnj

L-/I P 6 4

t l

a

:/ 1 1 X ,I l T -

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' T l - l T

| | |"Ul n l

-r

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n n n t lt t t l t t t lt | | | | | lt | i l t t l

. l l l l l l l l i3 t | | | Lr l l l l l l l l . .- l n l E t d E

3 s p

: I '

Tr

n r-tt t t l| | t lI t l| | t l| | t l| | t lt r t lp l n l

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I t ll l s l lI l r l Il.nJ - Lrr.l

m

l f c r r s E

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t{

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r t I

E l It lt lg N L J

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n l Ia l Ia t I

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7 ' Y : X

t t _ t lI l : l It t t lI t - ! t I

Ld -'

[-ol:; | . - - - 1

T r t lr l l r l I' l l 5 l I

r l l - ! l I- l l - l l' t n l L d

t nI U

t l!

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q i :

t-tt t

t lt tt lt ll lt.nl

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q g 3 r - r[ l l . - l

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B l l l l ; l l s" l l l l u l l ur l | | l - . ' - l l - . r -- l n i I n l - l n l -

- l I c rsz

T-tut - t s n s T rl l ' l l l l

l l s l l E l lI l r - l l r - l Iln | - hJ

-- l-oj

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o.J={ - g--__o}4

o.r){ -prH

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c a t tl " l = | ? f i

F---15-___r_i

Logic Lower (I /2)

t a 7

o lc l

5 Sa 9

o

I-r

:-.t--lI I

t lt lt l

t lt n l

I

T

d

T-lt l

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TI- l - l I

tJ- Jd

, c t , 5 ,s .l7^\ i- \

TY.V1 1 1 i

I '1D-32 IO / 3220 Service Manual-Ol

F i g . 4 . 2 . 3 . I

4-B

C h e c k i n g p o i n t , c o n t i n u e d

(m) ICTB ro 7L#I4 each

( j) rc8A #ls

(k) rcsA #r4

(f) D5 Cathode

(e) rCzL #7

(") Q2 Base

:Q

9

o- TP6

t lt lt lt lI It lt lt lt l

l n rA

Ex F 3 3

1 - - H H H

I I t-l t-l t-t t-t t-ls l l n l l ; l l n l l x l l ; l lr l l r l l ; l l ; l l r l l ; l l

l l l l l r r r r r r l-r- | I -r- | | -.r- | | r | | -! | | -! I I- l n l - l n l - l n l - l n l - l n l - l n lL K J H G F E D C B

pPDr?z7 . X tO

n 6 n f

t s 3 s 3 * 3 n I! r r H T l ? n x H

n l l n l l n l l n nl l d l l l l e l l l l s l l e l l l l Gl ' , l *H [-l *[.] [,] +H*Lj u

t .

(,)16l-\

)15/z\

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l @ r {

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t E q

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YR9 VR8 YR? VR6 YRs VRlxrrr !!II! ruro-

lc f f r rasr l l t r xL.Y | - l !e iJ I rn tsxdp I

VR3 VR? VR II t { _ ( [ Y f L I iL1J!}J

F i g . 4 . 2 . 3 . 2

MD-32 IO/ 3220 Serv ice Manual-01

- i iF U

Ir_.n r-r

ll t i t i t t tt t i t t t t lI r i l t t ll t r l l " r t ll l i i l s | | Il l l l F ; l l II l_ l t_ l rn r L t r-J LIIJ L-J

i : : l ' :

i ; { l

g t t *: l l - Tv l l "

" , I l ( l; r l _ l

- t l ' - ' l o, : , . , r ( l l ; , &, , ; l r 1 r - l

+'u i ' ,.F{ !; l i| . : - I i l \ - ' l c

l l d li _ . | | t r r ft o . p . F t ' | |. - r f - \ ,

| 1 " , ., ro r ' ' J ts : i - l 3 l$ l

f / f c r t r !

'..V lo: l-l +_ , - - _ | |i - t + i l l d lt u r u t t dI N I I Il - c 1 . 8 I I

J I F r r ; | | - . 1,. r--r d'' t-C'l 5-

\ , t -.\_-/ , : .C l a T " N h @

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l It t ll t l

.',ii -_. :;l.--1lgJ-

4-9

( d ) R l

Logic Lower (212)

4 - 1 0 I t lD-32IO/ 3220 Serv ice Manual-Ol

4- l 0 I "1D-32I0/ 3220 Serv ice Manual-O1

5. REPLACEMENT OF MAJOR COMPONENTS

5.1 Antenna unit

When replac ing any component of the antenna uni t , be sure to turn of f thepower complete ly , and take out the antenna dr ive motor fuse. Place a not icel ike ttAntenna is Under Inspectiontt near the power switch of the display r sotha t nobody tu rns the power on ca re less ly .

R e f e r r i n g t o F i g . 5 . 1 , l o o s e n e a c h f o u r ( t o t a 1 e i g h t ) f i x i n g s c r e w s o f t h ef r o n t a n d r e a r a n t e n n a c o v e r s . a n d r e m o v e c o v e r s .

C o v e r

F i x i n g s c r e t ^ tMRT-133 (MD-3210)

l.[RT-133 and I'iRT-134

MRT-134 (MD-3220)

F i g . 5 . 1

5.1.1 Dismount ing t rnasmit ter / receiver (TR) uni t

( a ) T h e T R u n i t i s m o u n t e d r e a r i n s l d e t h e a n t e n n a u n i t . A t f i r s t d i s c o n n e c t

c o n n e c t o r s J 1 o f c a b l e W 1 , a n d J 4 o f \ 1 2 s h o w n i n F i g . 5 . 1 . 1 ( a ) .( b ) R e m o v e L w o f i x i n g s c r e w s o f l h e T R u n i t .( c ) T a k e o u t t h e u n i t a s s h o w n i n F i g . 5 . 1 . 1 ( b ) .

F i x i n g

Bow

+Bow

+

J 4 o f W z

of t.J1

T R u n i t

( a ) ( b )

Fig. 5. I . I Dismounting Transmitter/Receiver (TR) Unit

5.I.2 Replacement of TR unit components

F i g . 5 . I . 2 . I i l l u s t r a t e s t h e 1 0 k W T R u n i t f o r M R T - 1 3 3 ( M D - 3 2 1 0 ) , a n d F i g .5 . I . 2 . 2 r h e 2 5 k W T R u n i r f o r M R T - 1 3 4 ( M D - 3 2 2 0 ) .

( 4 ) + ( 4 )

s c r e w ( 2 )

MD-32L0/3220 Serv ice Manual-O1 5 - 1

( 1) Magnetron IMSFI 4258 ( 10 k\ t / ) or 83564A (25 kW) ]

CAUTION

( a ) K e e p s t e e l o r i r o n t o o l s s u c h a s w r e n c h a n d s c r e w d r i v -e r s m o r e t h a n 2 . 5 c m a p a r t f r o m t h e m a g n e t r o n . U s e n o n -m a g n e t i z i n g s c r e w d r i v e r f o r r e p l a c e m e n t o f m a g n e t r o n .

( b ) A l t h o u g h t h e m a g n e t r o n l o o k s s o 1 i d , i t h a s d e l i c a t e i n -t e r n a l s t r u c t u r e . H a n d l e w i t h c a r e a n d d o n o t a p p l yh e a v y s h o c k .

( c ) A f t e r t h e m a g n e t r o n i s r e p l a c e d , b e s u r e t o p r e h e a t t h eheaLer o f new magnet ron a t leas t 20 minu les on STANDBYc o n d i t i o n .

( a ) P l a c e t h e T R u n i t w i t h t h e m a g n e t r o n s i d e u p .( b ) C u t o f f L h e t i e - 1 a p f i x i n g t h e n a g n e t r o n 1 e a d s .( c ) D e s o l d e r t w o m a g n e t r o n l e a d w i r o . ( n r o a . , ^ . n d y e 1 1 o w ) f r o m t h e p u l s e

t r a n s t o r m e r .( d ) B y r e m o v i n g f o u r f i x i n g s c r e w s ,( e ) F ix a ne l^ / magneLron to the

c h a s s i s , a n d s o l d e r L h e y e l 1 o wl e a d t o p i n # 4 , a n d g r e e n l e a dt o # 6 o f L h e p u l s e t r a n s f o r m e r .I n o r d e r t o a v o i d c o r o n a d i s -c h a r g i n g , t h e m a g n e t r o n l e a d ss h o u l d b e c u t t o p o s s i b l e m i n i -mum length and the w i re endsm u s t b e c o r r e c t l y s o l d e r e d t ot e r r n i n a l s .

( f ) R e f e r r i n g t o p a r a . 3 . 2 . 1 , c a r r yo u t t h e t u n i n g a d j u s L m e n t .

d is rnount and take ou t the magnet ron .

C i r c u L a t o r

L i m ' i t e rP u L s e t r a n s f o r m e r

C o v e r

M o d u L a t o r

I F u n ' i t

D i o d e 0 1

D i o d e 0 2

F c o v e rR e s i s t o r R 1

M a g n e t r o n

Components of 10 kW TR Unit

5-2

F i g . 5 . 1 . 2 . 1

I ' lD-32 IO / 3220 Serv ice Manual-01

(2) Modulator 1239U522368 ( 10 k\,{) or 229U25361 (25

( a ) R e f e r r i n g t o F i g . 5 . I . 2 . I a n dF i g . 5 . 1 . 2 . 2 , d i s c o n n e c t E 1 t oF ,4 . In case o f 25 kW modu la to r ,a l so d isconnec t J3 and J4 .

( b ) R e m o v e s e v e n f i x i n g s c r e w s o fthe 10 kW modu la to r o r n ines c r e w s o f 2 5 k l { m o d u l a t o r . t h e ntake ou t the board .

P u L s e t r a n s f o r m e r

M o d u L a t o r

kw) lJ 4

C i r c u L a t o r

25 kt l r | TR uni t

E 1 t o E 4

C o v e r

M I C

L i m i t e r

"1

S p a c e r

D i o d e

D i o d e

R e s i s t o r

un ' i t

I F c o v e rF a n m o t o r

fv lagnet ron

Fig. 5.I .2.2 Components of 25 kW TR Unit

(3) IF uni r (239U525r2)

(a ) Remove two IF cover f i x ing sc rews and remove the cover .(b ) D isconnec t J2 , remove s i x f i x ing sc rews o f the IF un i l , and

ou t the board . Moun t new un i t i n reverse s teps .(c ) When new IF un i t i s moun ted , ca r ry ou t the tun ing ad jus tment

t o D a r a . 3 . 2 . I .

o1

o2

R1

then Lake

r e f e r r i n g

( 4 ) M I C ( N J T 1 9 4 6 o r S - R X 3 4 )

( " ) R e m o v e t h r e e f i x i n g s c r e w s ( N J T I 9 4 6 ) o r f o u r ( S - R X 3 4 ) o f t h e M I C c o v e r ,and d ismount the cover .

( b ) R e m o v e f o u r f i x i n g s c r e w s a n d n u t s o f t h e M I C , t h e n t a k e o u t t h e M I C .M o u n l n e w M I C i n r e v e r s e s t e p s .

( . ) W h e n n e w M I C i s m o u n t e d , c a r r y o u t t h e L u n i n g a d j u s t m e n t r e f e r r l n g t op a r a . 3 . 2 . I .

C h a r g i n g c h o k e

MD-32 I0 /3220 Serv ice Manua l -O l 5-3

5.1.3 Replacement of S CON (scanner connection) board

The S CON (scanner c ,onnec l ion) boardj , n t e r f a c e s t h e a n t e n n a a n d d i s p l . y ,a s w e l l a s o t h e r b o a r d s i n t h e a n -tenna un i t . IL a lso conta ins the SHFa n d A Z I r e f o r m i n g c l r c u i t s . A s s h o w ni n F i g . 5 . 1 . 3 , f o l l o w i n g c o n n e c t o r sare mounted on Lhe board fo r t rans-f e r r i n g v a r i o u s s i g n a l s .

N y L o n c L i PJ 3

J 2

J 1

S C O Nb o a r dE I :

E 2 :

T 1l l .

J 2 :J 3 :

I n t e r c o n n e c t i o n o f a n t e n n a a n dd i s p l a y w i t h a n l e n n a c . a b l e .Sends ou t d r ive motor power andr e c . e i v e s S H F i n p u t s i g n a l .I n t e r f a c e w i t h I F u n i tI n t e r f a c e w l t h m o d u l a t o r b o a r df n t e r f a c e w i t h A Z I p u l s e g e n e r a -Lor a t the boLtom o f d r ive motor

F i x i n g s c r e w ( 4 )

n t e n n a c a b L e

5.1.3 Replacement of S CON Board

i l

2

R e p l a c e m e n t i s d o n e a s f o l l o w s :

( 1 ) R e f e r r i n g t o F l g . 5 . 1 , o p e nb o w s i d e a n t e n n a c o v e r .

( 2 ) R e m o v e a l l w i r e s o f E l a n dD i s c o n n e c L c o n n e c t o r s J 1 .a n d J 3 , a s w e 1 1 .

( 3 ) R e m o v e f o u r f i x i n g s c r e w stake ou t the board .

Fig -the

E 2 .J 2 ,

and

B o L t ( 4 )'gB r a c k e t

(4 ) When new board i s moun ted , con-f i rm that JUMPER wire is set tothe same s la tus o f o ld board .

5. I .4 Replacement of motor blush

W h e n t h e m o t o r b r u s h i s w o r n , p a i ro f t h e m s h o u l d b e r e n e w e d .

( 1 ) R e f e r r i n g L o F i g . 5 . 1 , o p e n t h eb o w s i d e a n t e n n a c o v e r .

( 2 ) R e f e r r i n g t o F i g . 5 . I . 4 , u n s c r e wb o t h s i d e s m o t o r b r u s h e s a n d r e -p l a c e w i t h n e w o n e s .

5. I .5 Replacement of motor

( 1 ) R e f e r r i n g t o F i g . 5 . 1 , o p e n t h eb o w s i d e a n t e n n a c o v e r .

( 2 ) R e f e r r i n g L o F i g . 5 . 1 . 3 , r e m o v ea l l w i r e s o f E i a n d F , 2 . D i s c o n -n e c t c o n n e c t o r s J l , J 2 , a n d J 3 ,a s w e 1 1 .

( 3 ) R e m o v e a l l n y l o n c l i p s f o r c a b l ea n d b i n d s o f m o t o r w i r e s .

( 4 ) R e m o v e f o u r f i x i n g b o l t s f o r t h ebracket and take ou t the brackeL

5 - 4

f4ot o r

P h o t o - i n t e r r u c t e r

C o v e r

F i x ' i n g s c r e w

F i g . 5 . I . 4

F i x i n gs c r e r . / ( 4 )

B r u s h

\

Replacement of Motor

Nr:r:n

MD-321 0 / 3220 Serv ice Manual-Ol

t o g e t h e r w i t h t h e d r i v e m o t o r .( 5 ) D e t a c h t h e m o t o r f r o m t h e b r a c k e t b y r e m o v i n g f o u r f l x i n g s c r e w s .( 6 ) W h e n r e p l a c i n g t h e m o t o r , d e t a c h t h e p h o t o - c o u p l e r o f A Z I p u l s e g e n e r a -

to r by remov ing two f i x ing screws o f the cover , and then mount the gen-era tor to the new motor .

( 7 ) T a k e r e v e r s e s t e p s o f t h e a b o v e p r o c e d u r e f o r a s s e m b l i n g n e w m o t o r . I no r d e r L o f i x t h e m o t o r a t c o r r e c t p o s i t i o n , i n s e r t a s h e e t o f p a p e r b e -t w e e n t h e m a i n g e a r a n d p i n i o n b e f o r e t i g h t e n i n g t h e f i x i n g b o l t s o ft h e b r a c k e t . C a r e f u l l y a d j u s l L h e g e a r i n g s o t h a t t h e p a p e r 1 s t a k e no u t b y r o t a t i n g t h e a e r i a l b y h a n d , a n d t h e n s e c u r e l y f i x t h e b o l t s .

5 .2 D isp lay Un i t

5.2.1 Contro l panel (MD-3210-7200)

T h e c o n L r o l p a n e l M D - 3 2 1 0 - 7 2 0 0 i sb u i l t i n a L i l t i n g t y p e c a s e u n i t .T h e u n i t i s c o n n e c t e d t o t h e d i s -p l a y w i l h a 7 5 c m l o n g s t a n d a r dc a b l e . T h e u n i L c a n b e d i s m o u n t e df r o m t h e d i s p l a y u n i L e n a b l i n g u pt o 7 5 c m l o n g r e m o l e c o n L r o l . T h ec a b l e c a n b e e x t e n d e d u p t o f i v em e t e r s o n o p t i o n a l o r d e r f o r I o n o

d i s t a n c e r e m o L e c o n t r o l .

R e f e r r i n g L o F i g .c o n t r o l p a n e l u n i ta s f o l l o w s :

2 . I . I , t h ed ismounLed

5-.i ^L 5

D i s c o n n e c t t h e d i s p l a y s i d ec o n n e c - t o r o f t h e c o n t r o l u n i Lc a b 1 e .R e m o v e t w o s i d e f i x i n g s c r e w sa n d t a k e o u t t h e u n i t .

The f ronL f rame and rear cover en-c a p s u l a t e t h e c i r c u i t c o m p o n e n t s .A s s h o w n i n F i g . 5 . 2 . 1 . 3 , t h e m e m -b r a n e s h e e t w i t h t r a c k b a 1 1 , c h a s -s i s , b o a r d o f c o n t r o l p a n e l w i t h 3swi tches and 8 cont ro ls a re assem-

F ig

b l e d l n s i d e t h e c a s e . F o r d i s a s s e m b l i n gl o w i n g p r o c e d u r e :

( 3 ) R e m o v e e l e v e n k n o b s o f t h e c o n -t r o l s a n d s w i t c h e s a s f o 1 1 o w s .

( a ) C a r e f u l l y r e m o v e t h e c a p o fe a c h k n o b w l t h a c u t t e r b l a d eo r 1 1 k e . S e e F i g . 5 . 2 . I . 2 .

( b ) L o o s e n t h e c e n t e r h e x a g o n a lh e a d s c r e w b y r o t a t i n g c o u n l -e r - c l o c k w i s e w l t h a b o x s p a n -n e r o r s c r e w d r i v e r a n d r e m o v et h e k n o b .

( c ) T a k e o u t t h e p a c k i n g .

l " iD-32 L0/ 3220 Service Manual-O1

F i x i n gs c r e w ( ? )

C o n t r o Lp a n e Lu n i t

C a b L e

C o n n e c t o r

Detaching Control Unit

t h o s e c o m D o n e n t s . f o 1 1 o w t h e f o l -

F ig . 5 .2 .1 .2 Remov ing Knobs

( 1 )

( ) \

. 5 . 2 . L . l

W

5-5

( 4 )( s )

( 6 )

R e m o v e e i g h t f i x i n g s c r e w s o f t h e r e a r c o v e r a n d o p e n t h e u n i t .D i s c o n n e c t c o n n e c t o r s J 7 2 0 I , J 7 2 0 2 , J 7 2 O 3 , a n d J 7 2 0 4 o n t h e c o n t r o lp a n e l b o a r d .R e m o v e t e n s c r e w s f i x i n g t h e c o n t r o l p a n e l b o a r d t o L h e c h a s s i s , a n dtake ou t the board . The t rack ba l l i s d isassembled by remov i -ng fourscrews f i x ing the component to the membrane sheet f rame.

R e a r c o v e r

C o n t r o a L

C h a s s i s

F i x i n g s c r e t JT r a c k b a L l

"%a6o Gc sRilVK n o b s a n d p a c k i n g s C p d M e m b r a n e s h e e t

F ra ine

Fig . 5 .2 .1 .3 D isassembl ing Cont ro l Pane l Un i t

5.2.2 Logic upper (l ' [D-3210-700O) and logic lower (t ' lD-3210-7100)

T h e l o g i c b o a r d s a r e m o u n t e d o n t h e r i g h t s i d e o f d i s p l a ] ' . D i s m o u n t i - n g L h eb o a r d s a r e c a r r i e d o u t a s f o l l o w s :

( 1 ) R e f e r r i n g t o F i g . 5 . 2 . 2 ( a ) , r e m o v e 1 4 f i x i n g s c r e w s , a n d o p e n t h e d i s -p l a y c o v e r .

( 2 ) R e f e r r i n g t o F i g . 5 . 2 . 2 ( b ) , d i s c . o n n e c t J 7 0 0 1 o f t h e l o g i c u p p e r . W h e no p t i o n a l g y r o / t o g i n t e r f a c e i s u s e d , a l s o d i s c o n n e c t J 7 O O 2 .

( 3 ) R e m o v e n i n e f i x i n g s c r e w s o f t h e l o g i c u p p e r a n d t a k e o u t t h e b o a r d .

upper

J7002

s c n e w ( 4 )

( a )

J7103

Ioyer

Dismounting Logic Upper/tower

I ' lD-32 I0 / 3220 Serv ice Manual-Ol

R e a r c o v e r

boa r 'd

<x

D ' i s p L a y c o v e n

J 7001

17105

J7 102( b )

s-6

F i x i n g

F i g . 5 . 2 . 2

CAUTION

T h e l o g i c u p p e r i s a s s e m b l e d w i t h a b a c k - u p b a t l e i : y . D o n o t p l a c et h e b o a r d o n c o n d u c t i v e m a t e r i a l s s u c h a s m e t a l l i c o l a t e o r f o i l .

( 4 ) D i s c o n n e c t J 7 I O 2 , J 7 1 0 3 , J 7 I 0 4 , J 7 1 0 5 , a n d J 7 1 0 6 o f t h e l o g i c l o w e rb o a r d .

(5 ) Remove n ine spacers and th ree f i x ing sc rews o f the log ic lower and takeou t the board .

W h e n t h e l o g i c u p p e r ( M D - 3 2 1 0 - 7 0 0 0 ) i s r e p l a c e d w i t h n e w b o a r d , s e t t i n g o ft h r e e D I P s w i t c h e s S W l , S W 2 , a n d S W 3 s h o u l d b e c h e c k e d . I f t h e s e t t i n g d i f -f e r s f r o m p r e v i o u s b o a r d , r e s t o r e t h e s e t t i n g , i f n e c e s s a r y . F u n c t i o n s s e tb y D I P s w i t c h e s a n d t h e i r s t a n d a r d s e t t i n g s a r e l i s t e d i n p a r a . 1 . 5 . 2 .

W h e n t h e l o g i c l o w e r ( M D - 3 2 I 0 - 7 1 0 0 ) i s r e p l a c e d w i t h n e w b o a r d , s e t t i n g s o ff i v e j u m p e r p i n s s h o u l d b e c h e c k e d , a n d c o r r e c t e d i f n e c e s s a r y . F u n c t i o n sa n d i n i t i a l s e t t i n g s t a t u s o f t h o s e p i n s a r e e x p l a i n e d i n p a r a . 1 . 5 . 1 . F u r -t h e r m o r e , t e n c o n t r o l s a n d t w o s w i t c h e s a r e a s s e m b l e d o n l o g i c l o w e r b o a r da s s h o w n i n F f g . 3 . 1 . 1 . A d j u s t m e n t o f t h o s e c o n t r o l s a s w e l l a s s e t t i n g o fs w i t c h e s s h o u l d b e m a d e w h e n t h e b o a r d i s r e n e w e d . T h e a d j u s t m e n t i n c l u d e s :

The power supp ly board is rnouned ins ide the rear pane1. D ismount ing theb o a r d i s c a r r i e d o u t a s f o l l o w s :

R e f e r L o F i g . 5 . 2 . 3 . I

( 1 ) R e m o v e f o u r f i x i n g s c r e w s o f t h e c o v e r f o r t e r m i n a l s o f t h e o p t i o n a lg y r o / I o g i n t e r f a c e b o a r d o n t h e r e a r p a n e l , a n d o p e n t h e c o v e r .

( a ) P u l s e r e p e t i t i o n f r e q u e n c y ( P R F )( b ) T u n i n g( c ) V i d e o i n p u t 1 e v e l( d ) P r e s e t g a i n( e ) S T C( f ) T r i g g e r d e l a y(g ) SHF and bear ing

5.2.3 Power supply ( l ID-3210/ 3220-6000)

T e r m i n a L c o v e rf i x i n g s c r e w ( 4

Te rm ' i na L cove r

J600J6004J6005

R e a n p a n e L

D a t a i n p u tc o n n e c t o n

F i g . 5 . 2 . 3 . 1 Disassenbling Display Rear

S e e p a r a .S e e p a r a .S e e p a r a .S e e p a r a .S e e p a r a .S e e p a r a .S e e p a r a .

O p t i o n b o a r dt e r m i n a L c o v e r

0 p t i o n b o a r dt e r m ' i n a L c o v e rf i x i n g s c r e w ( 4 )

P o w e r c o n n e c t o r

E a r t h t e r m i n a L

R e a r p a n e Lf i x ' i n g s c r e t ^ r ( 1 0 )

Panel

3 . 3 . 3 ( 1 )3 . t . 23 . 3 . 3 ( 3 )- 1 -

J . I . J

3 . r . 43 . 1 . 53 . 1 . 6

MD-32 IO/ 3220 Service Manual-Ol 5-7

( 2 ) R e m o v e f o u r f i x i n g s c r e w s o f t h e t e r m i n a l c o v e r o n t h e r e a r p a n e l , a n do p e n t h e c o v e r . D i s c o n n e c t t h e a n t e n n a c a b l e c o n n e c t o r s J 6 0 0 4 . J 6 0 0 5 .a n d J 6 0 0 6 .

( 3 ) D i s c o n n e c t t h e p o w e r c a b l e c o n n e c t o r a n d e a r L h t e r m i n a l .( 4 ) D i s c o n n e c t t h e d a t a i n p u t c o n n e c t o r f r o m o p t i o n a l n a v i g a t o r , i f u s e d .( 5 ) R e m o v e t e n f i x i n g s c r e w s o f t h e r e a r p a n e 1 , a n d s 1 o w 1 y o p e n t h e p a n e 1 .

R e f e r t o F i g . 5 . 2 . 3 . 2 .

(6 ) D isconnec t connec to rs J6001 , J6002 , and J6003 . In case o f l qD-3220 , a l sod lsconnec t J6009 .

(7 ) De tach the rear pane l f rom the d isp lay un i t .(B ) F ind the power supp ly board rnoun ted on the rear pane1 . D isconnec t te r -

m i n a l s E 1 , F . 2 , E 9 , E 1 0 , E 1 l , a n d E L 2 , a s w e l l a s c o n n e c t o r J 6 0 0 7 .(9 ) Remove f i f t een (15) f i x ing sc rews o f the power supp ly board , and take

ou t the board f rom the chass is .

D ' i s p L a yu n i t

J 6009

J 6007

J 5 0 0 1J 6002

E1?E 1 0

E11E9

J 6003

F i g . 5 . 2 . 3 . 2 Dismounting Power Supply Board

When the power supp ly (MD-3210-3220-6000) i s rep laced w i th new board , thes w i t c h i n g r e g u l a t o r o s c i l l a t i n g f r e q u e n c y , + 1 0 0 V o u t p u t 1 e v e 1 , a n d m a g n e -t r o n h e a t e r c u r r e n t s h o u l d b e a d j u s L e d . R e f e r t o p a r a . 3 . 3 . 1 .

5.2.4 CRT un i t

CAUTION

EHT (ex t ra h igh tens ion) charge may be remained on the CRT anodec a p . P r i o r t o d i s m o u n t t h e C R T u n i t , d i s c h a r g e t h e a n o d e v o l t a g ew l t h a c l i p c o r d o r l i k e .

( 1 ) R e m o v e t h e( 2 ) O p e n t h e

Disc onnectrear pane l

5-8

d isp lay cover by remov ing L4 f i x ing sc rews .r e a r p a n e l w i t h p o w e r s u p p l y . I R e f e r t o p a r a . 5 . 2 . 3 . lJ6001, J6oo2 and J6003 of the power supply and derach rhef rom the d isp lay un i t .

MD-32I0/ 3220 Serv ice Manual-O1

(3 ) F ind two c i r cu i t boards , the CRT ma in board PWD1050A (bo t tom) , and CRTn e c k b o a r d P W D 1 0 5 1 A ( C R T s o c k e t ) i n s l d e t h e d i s p l a y u n i t . F i g . 5 . 2 . 4 . Ishows layou t o f the CRT c i rcu i t boards .

(4 ) D isconnec t connec to rs J7105 and 7LO6 on the log ic lower MD-3210-7100 .Pu11 the cables onto the CRT main board ins ide the uni t .

(5 ) D isconnec t p in #16 o f the CRT neck board and ca re fu l l y remove the CRTsocke t f rom the CRT neck .

(6 ) D isconnec t connecLor P46 I o f the cab le to CRT de f lec t ion yoke .( 7 ) D i s c o n n e c L t h e C R T a n o d e c a p .

F r "om Log i c

C R T

C R T a n o d e c a p

M o u n t i n g p L a t e

P461

P202

F r o m L o g i c L o w e r J 7 1 0 5V ' i deo ' i npu t

CRT main board

P i n # 1 6

T o J 6 0 0 3J 6001

L o w e r J

\lt

7 1 0 6

P201

J 6002C R T S o c k e t

neck boardCRTo

3

\e a rPoHer supply o p a n e L

F i g . 5 . 2 . 4 . I Layout of CRT Unit Boards

( 8 ) W h e n o p t l o n a l g y r o / I o g i n t e r f a c e b o a r d i s m o u n t e d o n t h e l e f t h a n d s i d eo f t h e d i s p l a y u n i t , d e t a c h t h e b o a r d . R e m o v e f o u r ( 4 ) f i x i n g s c r e w s o ft h e m o u n L i n g p l a t e , r e f e r r i n g t o F i g . 5 . 2 . 4 . I . C a r e f u l l y t a k e o u t L h emount lng p la te w i th CRT main board and neck board th rough the le f t hands i d e o p e n n i n g o f t h e d i s p l a y c h a s s i s a s s h o w n i n F i g . 5 . 2 . 4 . 2 .

( 9 ) R e m o v e t w e l v e ( I 2 ) f i x i n g s c r e w s o f t h e C R T m a i n b o a r d a n d d e L a c . h L h eb o a r d f r o m t h e m o u n t i n g p 1 a t e .

( 1 0 ) R e f e r r i n g t o p a r a . 5 . 2 . I , d i s m o u n t t h e c o n t r o l p a n e l u n i t . D i s m o u n t t h eb r a c k e t b y r e m o v i n g f i v e ( 5 ) f l x i n g s c r e w s .

( 1 1 ) R e m o v e t e n ( 1 0 ) s c r e w s f i x i n g t h e f r o n t f r a m e t o t h e d i s p l a y c h a s s i s .

Securely hold the front frame and carefully draw it out with CRT. Besure that the CRT is so heavy.

P lace the CRT wi th the f ron t face o f the f rame bot tom.( I 2 ) R e m o v e f o u r ( 4 ) f i x i n g n u t s o f t h e C R T a t i t s c o r n e r s , a n d t a k e o u t a s -

s o c l a t e d w a s h e r s .( 1 3 ) S l o w 1 y l i f t u p t h e C R T a n d d e t a c h f r o m t h e f r o n t f r a m e .( 1 4 ) F o 1 1 o w t h e r e v e r s e p r o c e d u r e f o r m o u n t i n g n e w C R T a n d C R T b o a r d s .

MD-3210/ 3220 Serv ice Manual-Ol 5-9

H n c d e

C R T m a i n b o a r d

c a o

€

CRT neck board

C u s h ' i o n

F i x i n g s c r e b r ( ? )

c h a s s i s

F ' i x

F i g . 5 . 2 . 4 . 2 Dismounting CRT and CRT Boards

F i x i n g s c r e w @ / U ;

l ' l oun t i ng

F r o n t R e a r p a n - ' L

-Il n g s c r e t J ( 1 0 )

D i s p L a y

p L a t e

f r a r n e

s -10 MD-32 I0 / 3220 Serv ice Manua l -O l

6. TROUBLESHOOTING

A s r n o s t c i r c u i t s o f t h i s r a d a r a r e c o m p o s e d o f i n t e g r a t e d c i r c u i t s ( I C ) , i L

is ra ther d i f f i cu l t to loca te de fec t ive components w i th usua l ins t ruments

s u c h a s a n o s c i l l o s c o p e o r m u l t i - m e t e r . I n o r d e r t o r e s t o r e t h e s y s t e m i n

t r o u b l e t o n o r m a l o p e r a t i o n a s q u i c k l y a s p o s s i b l e , t h i s s e c t i o n e x p l a i n s

f l o w c h a r t s a n d t a b l e s f o r l r o u b l e s h o o t i n g b a s e d o n r e p l a c e m e n t o f p r i n t e dc - i r c u i t b o a r d s .

F o r t r o u b l e s h o o t i n g m e a s u r e m e n t , p r e p a r e a n o s c i l l o s c o p e , f r e q u e n c y c o u n t e r ,

a n d / o r a m u l t i - m e t e r w i t h i n t e r n a l r e s i s t a n c e o f 2 0 k n / V D C , a c c o r d i n g t o r e -

s p e c t i v e d e s c r i p t i o n s .

6. f Troubleshooting by Observing Display

I f the radar shows abnor rna l opera t ion , somet imes the cause o f ma l func t ion

c a n b e f o u n d b y c a r e f u l l y o b s e r v i n g i m a g e s s h o w n o n t h e C R T o f t h e d i s p l a y

u n i L . R e f e r t o f l o w c h a r t s a n d t a b l e s i n t h i s p a r a g r a p h f o r a n a l y s i n g L h ef a u l t s .

( 1 ) R a d a r d o e s n o t c o m e o o , a l t h o u g h P O W E R s w i t c h i s p r e s s e d .

Ship 's power source

Power supply MD-321013220-6000Yes

Control panel MD-3210-7200

Power supply MD-3210/3220-6000

Yes

( 2 ) C R T i s n o t 1 i t u p

S T A R T

is sh ip ' s ma ins vo l tage+ 10% of normal value ? Sh ip ' s ma ins supp ly i s t roub le .

Is the main fuseb lown ?

FET Q1 to Q4 , o r d iode D1 to D19 ,D33, D34 may be defect ive.

Is the voi taee betweenJ7104 #1 and #2 o f loe ic lower

MD-3210-7000 as belol t ?POI.JER switch pressed: 0 VP0WER switch open: 12124 Y

Check for cont inu i ty o f cab ies .Check the membrane sheet.

Check E3-E4 & E6-87 connect ions.IC3 and i ts related components maybe defect ive .

S T A R T

D4 to D11 may be defect ive.+100V and/or +50V 1 ine may be short-c i rcu i ted to ground.

Are +100 V and +50 Vnormal ?

supplyMD-3210i 3220-6000

MD-32L0/3220 Serv ice Manual-O1 6-1

7

Yes

Yes

Yes

(3 ) Abnorma l d i sp lay on CRT

CRT unit

CRT un i t

Power supply MD-3210/3220-6000

Cont ro l pane l MD-3210-7200

Yes

Logic upperLogic lower

MD-3210-7000MD-3210-7100

Does CRT f i lamentl isht ?

Neck board is improper ly f i t ted.Cable between CRT uni t and J6003of power supply may be defect ive.

Is waveform at J7105#1 as shown in para.

4 . 2 . 3 ( 2 ) ( c ) ?Inproper f i t t ing o f the neck board.Cable between CRT uni t and J7105of log ic lower may be defect ive .MD-3210-7100 VRg may be defect ive .

Are +12 Y, -72 V and+5 V suppl ies normal ?

Respec t i ve rec t i f i e r c i r cu i t s .

Are vol tages of J7104 #7 to#10 as shown below ?

Br i l l i ance con t ro lfu1 ly CCl l l : 0 Vf u l l y C W : 5 V

MD-3210-7200 may be defect ive.Improper cab le connect ion.

Logic upper board may be defect ive.Video output of logic lower boardmay be abnormal.Check cable between J7001 and J7106.

N o . Trouble Cause Action

1 Pic tu re on CRT isno t s tab l l : . zed andmoves up /down orl e f t / r i g h t c o n t i n -u o u s l y .

( a ) I m p r o p e r s e t t i n g o fCRT s ize

( b ) I m p r o p e r s e t t i n g o fhorizontaT- scanning

( . ) L o o s e c o n n e c t i o n o fcab le be tween J7106and CRT un i t .

(d ) Improper ad jus tmento f V . H O L D a n d H . H O L Dof CRT ma in board .

(e ) Fau l t o f l og ic lower

Turn OFF SW3 #7 ofl o g i c u p p e r .

S e t J u m p e r J P 5 o f 1 o g -i c l o w e r t o 1 , 1 5 3 .

S e c u r e l y c o n n e c L t h ec a b l e p l u g s .

A d j u s t c o r r e c t l y .

R e p l a c e t h e b o a r d .

2 Marker r ings inthe p ic ture ared i s t o r t e d .

(a ) Improper ad jus tmento f V . S I Z E , V . L I N E ,S . C O R R E , a n d H . W I D T H .

(b ) Improper ad jus tmento f CRT neck co res .

A d j u s L c o r r e c t l y .

A d j u s L c o r r e c t l y .

6-2 MD-32 I0 / 3220 Serv ice Manua l -01

( 4 ) I A Z I F A I L I i " d i s p l a Y e d .

Yes

Yes

Yes

( 5 ) [ S I I F F A I L ] i " d i s p l a y e d .

Yes

Power supply MD-32I013220-6000

Losic iower MD-3210-7100

Loeic lower MD-3210-7100

Logic upper MD-3210-7000

Antenna

Yes

Yes

Yes

Antenna

Ir - . *|

-r/

Posi t ion o f leadswi tch is abnormai .Q1 of S CON is defect ive.Antenna cable is broken 0r improperconnect ion.

Loe ic lower MD-3210-7100

S T A R T

Antenna motor is defect ive.Motor brushes are worn out.Antenna cable is defect ive,or improper connect ion.

Is the vol tase approx.24 VDC between J6006# 5 ( + ) a n d f 7 ( - ) ?Does the antenna

rotate ?

Is the motor fuseblown ? Check the motor and brush.

Check short-c ircui t of mo-tor power l ine .

Is the vol tase atJ6001 #13 as below ?

Motor 0N: 0 VMotor 0FF: 12 U

Q23 to Q25 may be faul fv.improper cable connect ionbetween J6001 and J7102.

IC4T may be defect ive.Is AZIP s igna l a t J6004 #9of power supply as beiow ?

Ampl i tude: 12 Vp-pFrequency: 432 Hz AZI photo- interrupter is defect ive.

PLL c i rcu i . t o f S CON is defect ive .Antenna cable is broken 0r improperconnect ion.

Is s iena l a t IC4Z * I2logic lower as below

Ampl i tude: 5 Vp-PFrequency: 432 Hz IC4Z or IC5Y is defect ive .

improper connect ion between J6001and J7102.

CPU and/or per iphera l c i rcu i t i sdefect ive .Inproper connect ion between J7101and J7001.

S T A R T

is SHF sienal at J6005 #2of power supply as below ?

Ampl i tude: 12 Vp-pFrequency: 1 pu l se l2 .5 sec.

IC4Z is defect ive .Improper connect ion between J6001and J7102.

MD-32 I0 /3220 Serv ice Manua l -O1 6-3

( 6 ) P o o r s e n s i t i v i t y , e v e nSTC and FTC suppress ion

g a i n a n d v i d e o c o n t r o l s a r eL o m i n i m u m .

s e t L o m a x i m u m . w h i l e

S T A R T

Yes

Control panel

/Rr . vol tages at every\vut#7 of ICZL, 31, 4L t - -

, A / D . t r " . . t . d 5 V ? t

l N o

Improper contact of con-t ro l pane l cab le .VIDE0 cont ro l o f the con-t ro l pane i is defect ive .

Control panei

/ Is the vol tagei J6004 #2 as below1 No ise i eve l : 0 .6\ V i d e o l e v e i : 3 . 5

ut, \

,l-, /No I

#

\

at J6004 #3, \ Y . tas be low ? \max to 0V min l-max to 0V min Imax to 5V min/

re voltagesi l4, and #5( G A I N ) : 5 V

4 ( S T C ) : 5 V5 ( F T C ) : 0 V

Improper contact of con-t ro i pane l cab le .Fault of respect ive con-t ro ls o f the cont ro lpane l .

Loeic lower MD-3210-7100No

Improper adjustment of theana log v ideo c i r cu i t ., / ^' Does tune meter show

' tun ine po in t ?\ -

YesLogic lower MII ^ - T n I t

-3210-7100nlenna)

Nobu5 r r d l i l p .

Improper adjustment of iogic lower.Improper adjustment of Log IF amp.Go to Antenna

Lroubleshoot ing 6 .3 .

6.2 Operat ion Control Troubleshoot ing

T f ^ n A 1 2 t . i o n a 1 c o n t r o l o f t h e r a d a r s h o w s m a l f u n c L i o n , t r o u b l e s h o o L l n g i s

c a r r i e d o u t a s f o l l o w s .

( 1 ) A U T O T U N E d o e s n o t o p e r a L e .

Try AUT0 TUNE ad jus tmen t f i r s t i n pa ra . 3 .2 .1 .

Control panel

Yes Yes Logic lower MD-3210-7100

Yes

Loeic lower MD-3210-7100Yes

Antenna

S T A R T

Can TUNE controlselect AUT0 or l'lANtun ing d isp lay ?

TUNE cont ro l (VR4) is defect ive .

Is manuai tuningoperat ion poss ib le ?

Does tuning indi-cator operate ?

Adjustment of tuning cir*cu i t i s no t co r rec t .IC5R is defect ive .

I s TUNE .M vol t,aeeat J6005 #4 approx.

0 t o 3 . 5 V ?IC3N, IC5K are defect ive .

Tune meter l ine is broken.L o g I F a m p . u n i t i s f a u l t y .

6-4 MD-32 IO/ 3220 Serv ice Manua l -O1

Yes

( 2 ) G A I N c o n t r o l d o e s n o t o P e r a t e .

Yes

( 3 ) S T C c o n t r o l d o e s n o t o P e r a t e .

Yes

(4 ) FTC con t ro l does no t oPera te .

Yes

Power unit MD-3210/3220-6000Loeic lower MD-3210-7100

Antenna

Loeic lower MD-3210-7100

Cont ro l pane l MD-3210-7200

Logic lower MD-3210-7100

Control panel MD-3210-7200

Loeic lower MD-3210-7100

Control panel MD-3210-7200

Is TUNE'0 vo i taeeat J6005 S3 aPProx.

2 2 t o 3 0 V ?Power uni t +35 V suPPlY is faul tY.Logic lower IC3N is defect ive.

Improper connect ion of antenna cable.Log IF amp. , MIC, or Magnet ron maybe defect ive . Refer to Para. 6 .3 .

S T A R T

Ga in con t ro l c i r cu i t Q39 , Q16 , D10 ,or related parts may be defect ive.

I s GAIN con t ro l vo l t -age at J7104 #3 varies

f r o m 5 t o 0 V ?

GAIN cont ro l VR1 may be defect ive .Improper connect ion of cable betweenJ7201 and J7104.

S T A R T

Improper adjustment of I-STC-TETI VRzanh rcTe-TT[El vm. Rerer to s. z. s.STC c i r cu i t Q8 to Q10 , IC1L o r re -lated parts may be defect ive.

Is STC cont ro l vo l t -age at J7104 #4 varies

f r o m 5 t o 0 V ?

STC control VRZ may be defect ive.Improper connect ion of cable betweenJ7201 and J7104.

S T A R T

Is FTC cont ro l vo l t -ase at J7104 #3 varies

f r o m 0 t o 5 V ?

FTC cont ro l c i rcu i t QZ to Q4, Q40,or related parts may be defect ive.

FTC control VR3 may be defective.Improper connection of cabie betweenJ7201 and J7104.

MD-32 LO/ 3220 Service Manual-Ol 6-s

(5 ) VRM does no t opera te .

Measuring pointMD-3210-7200

Sl.l1 #3: Sisnal#2: Ground+ 5 v - n

O V - J L

( 6 ) E B L d o e s n o t o p e r a t e .

Yes

Measuring pointMD-3210-7200

Sltlz #3: Signal#2: Ground

+ 5 V - nt l

O V - - l L

( 7 ) T r a c k b a l l d o e s n o t o p e r a t e .

Yes

MeasurinB pointMD-3210-7200 Track bal l#3 , #4 , f 5 , #6 : S iena l

#2: Ground

6-6

Control panel MD-32i0-7200

Yes

Control panel MD-3210-7200

Losic upper MD-3210-7000Yes

Control panel MD-3210-7200

Yes

Control panel MD-3210-7200

Loeic upper MD-3210-7000Yes

Control panel MD-3210-7200

Logic upper MD-3210-7000

Yes

+ 5 V

O V

S T A R T

Membrane sheet or its con-nect ion cab le is defect ive .Does VRM 0N/0FF

switch operate ?Is s igna l as be low ?

0 N : 0 U / O F F : 5 V

Control panel MD-3210-7200may be defect ive.

Is waveform of VRMencoder output as

shown left ?EBL SltI1 may be defective.

Loeic upper MD-3210-7000maV be defect ive.

S T A R T

Membrane sheet or its con-nect ion cab le is defect ive .Does EBL 0N/0FF

switch operate ?Is s igna l as be low

0 N : 0 V / 0 F F : 5

Control panel MD-3210-7200may be defect ive.

Is waveform of EBLencoder output as

shown left ?EBL SW2 may be defect ive.

upper MD-3210-7000defect ive .

S T A R T

Track ba l l i s defect ive .Improper connect ion of t rack bal iand J7202.

Is waveform of trackbal l output as shown

below ?

Loeic upper board may be defect ive.

_JlMD-32 IO / 3220 Serv ice Manua l -O1

(8) Dimmer lamps cannot be turned 0N.

Yes

Yes

Control panel MD-3210-7200

Logic iower MD-3210-7100

Control panel MD-3210-7200

Yes

6.3 Antenna Troubleshooting

W h e n i t i s e s t i m a t e d t h a t m a l f u n c t i o n o f r a d a r i s d u e L o L r o u b l e o f a n t e n n au n i t , t r o u b l e s h o o L i n g i s p e r f o r m e d a s f o l l o w s :

( 1 ) A n t e n n a d o e s n o l r o l a t e .

F o l l o w L h e f l o w c h a r t i n p a r a . 6 . L ( 4 ) A Z I F A I L t r o u b l e s h o o t i n g .

( 2 ) P o o r s e n s i L i v i l y c a u s e d b y L r a n s m t t e r / r e c e i v e r L r o u b l e i s a n t l c l p a t e d .

Power supply MD-32I013220-6000

Yes

Yes

Power supplyMD-3210/3220-6000

S T A R T

Is DiM swi tch outputvol tage as beiow ?0 N : 0 V / O F F : 5 V

Membrane sheet may be defective.

Does DIMMER vol tageat TP1 of loeic lowervar ies cor rec t ly ?

DIMMER cont ro l c i rcu i t IC5P, IC3Nor related parts may be defect ive.

Trans is tor Q1 may be defect ive .Improper connect ion between J7201and J7104.

Does vol tage at com-mon 1 ine of DS1 to DSgvar ies cor rec t ly ?

Lapms DS1 through DSg may be blown.

S T A R T

Is MOD.S +300 V a tS CON E1 #17 OK ?

KZ or Q26 may be fau l ty .Improper connect ion of an-tenna cab le .

Is l'lOD fuse F3 ofpower supply blown ?

Pulse leneth is not se lec t -ed with detect ion range.

Log ic l ower : IC5V, IC4T ,Q35, Q36, Q37

Modu la to r : K l , K2 , K3Improper adjustment of [TRl'-]VR10 of log ic lower .Modulator SCR/diode are de-

fec t i ve .10 kl t l : Q9, Q1025 k l t l : Q9, Q10, Q11

Is magnetron heatervoltage between leadw i r e s 6 . 3 V + 1 0 % ?

Magnetron heater constantcu r ren t c i r cu i t IC5 , 832 ,or related parts may bedefect ive .

MD-32IO/3220 Serv ice Manual-O1 6-7

ANTENNA UNIT

E122

VIOLETBROWN

W.GREEN

/. DIAGRAMS7.1 Gircuit Diagram

Bold letters (for example VIOLET) : The thicker wire

Plain letters (for example vtotrr) : The thinner wire

DISPLAY UNITJ60061 GND BLUE2 MAG (H) GREEN3 +12 V RED4 GND BLACK( MOTOR + BROWN6

7 MOTOR - VIOLET8

I TUNE. R W-RED{ n MOD. S PINKJ60041 . V I D E O . G SHIELD

2 VIDEO CX GRAY{ P S ( M 1 ) W-GREENA.+ PS (L) GRAY5 T R I G . G SHIELD

o TRIG BROWN7 PS (M2) YELLOW8

I AZIP GREENJ6005II GND VIOLETI SHF WHITE3 TUNE. O ORANGE

4 TUNE. M RED

CHECKED BY

H. ShindoTYPE

MD-3210/MD-3220 |NTERCoNN ECT|oN D|AG RAM (ANTENNA-DIS PLAYDRAWN BY

K. Saruyama

I(ODENEb::ItrN*SDWG. NO.

M D-3210-E.H001

MD-321 013224 Service Manual-02 7 -1

ADDRESSDE CODER

MARK E R

V- RAM

MEMORY

CONT ROL

PANE LI NTERFACE NUMER I C

V- RAM

A D D R E S SSELECTOR

R A D A R

V- RAM2MEMBRANES'# I TCII

RA DAR

V- RAN1l

R A D A R

V- RAI''10ADDRE SSDE CODE R

T R A I L

V- RAMM E M O R YCONT ROL E R

COMPARAT OR

E XPANDE R

L . P . FCONT ROLER

TX. DELAYCONT ROL i t r ;ur

A 0 - 1 9

C R T C

H D 6 3 4 B 4

MAo- 1 I

AZI

| | + 5 Vi i + B V

I + l z v1 ^ 1 ,

I | - L l y

T r \I U

GY RO I l F

D I SPLAYU N I Ti l R D * 6 2

VCKE X T

SYNC

|-_-] si n r \ /I

u t I

i

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: a n / t -i u r va 2 r n i i u L u - . l

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D 0 - 8

L S I

K C D - 2 4

AZI

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' iI t r . , : : ' [ - i L ' f

i " ; i

f_-- rsHFApw i

- i " ' I

| | l . n N T R n r F R I:- - r - - r ' - - - " r PWH L U I \

r F . u L c n i P Wi i

TI]RESHOLDCONT ROL E R

E X PCONT ROT ER

i i r u N E . M

DCPO\vE RSU PPLY

M D - 3 2 1 0- 6 0 0 0

+ 100v+ 50vT UNEIUNE. Mt K t b

I F O L I T

MOD + 3 0MAGS H FlYl0T 0RAZI

r *I L l r { :

t J f V

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a \ | l l

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F I I I FI I L I L

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D . Y

C R T U N I TK2OMMOl B

G Y R 0 | l F K S A - 0 8L O G I C

U P P E R

t /D-3 21 0- 7 0 0 0

I SLOITED ARRAY ANTENNAM R A - 3 7

ROT ARY

t Y ) I

i-----+----

I

l l t \ / l l- L

II

-_T=_

I

I

I

I

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l rl t

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^ | t u -l j K + -' " l r l

I r 't li l lt l l

II

A N T E N N A U N I T M R T - 1 3 3

L

N

RF AMPM I X E R

t t t T ! n r -t \ J i I J q o

D I O D EL I M I T E RN J 5 6 9 2 8

O R N J 5 6 9 3 O

MAGNE T RONM S F 1 4 2 5 8

p i l t s F

T RANS

ANT E NNAM O T O R

C R TV I D E OEOARD

C R T D R I V E E O A R D

V I D E OM I X E R

&

L E V E L

CONT ROL

S C A L E , /C I . l E C K E D B Y

H ShindobnAwr i B t - -

- -

K.Saruyama

T Y P E

M D-3210T I T L E

GfNEHAL BLoCK DIAGRAM

D W C . N O .

MD-3210-1.H001I(ODENEb::Itr*CSM D-32 1 0 13220 &rvice Manuat -02 7 - 2

L O G I C

UPPER

MD-32- 7 0 0 0

f' r"-1 MrxEFI

l aII L E V E LI

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I

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: _ : _ - - - -

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M D-3210T I T L E

GENEHAL BLOCK DIAGRAMD R A W N B Y

K.SaruyamaI

I(ODEN:b::If,?NICS D W C . N O .

MD-3210-1.H001MD-321 0/3220 &rvice Manual-O2 7 -2

A 0 - 1 9

t uG Y R O

MEMERANESlv I ICH

t l F

D I S P L A YU N I TM R D - 6 8

MA0- 1 9

M i M O R YCONI ROL E R

I U N ET UI'IE . M

+ l 0 0 v+ 50v

I R I GI F O L I I

MOD+ 3 0 {MAGu t t l

uqrqRlr4 - 7 |A L I

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i_ i t lEF i L T E I1,,1D-32- 6 1 0 0

L F _ 2 I

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D l v l l a1 l 1t l L

EXTV C K I S Y N C

D I VI I 2r11

l iD K

V

II

0 - 7

Y 8 . sX E YDE CODE R

E B LV R M

CONT ROLCCT

E B LVRM

i l ii I - - - - r i

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GDO- 2A 0 - 5

L ) l

K C D - 2 4

LAMP

C R T B R I L L

T U N EG A I Nc T c

F T C

M D - 3 2 1 0- i 2 0 0

MARKER

V- RAIi|

P A N E LI NI E RFACE MEMORY

CONI ROL

NUMER I C

V- RAM

A D D R E S SS E L E C I O R

R A D A ?

V- RA {2

RA DAR

V-RAMi

R A D A R

V- RAMOADDRE SSDECODE R

T R A I L

V- RAM

TX. DELAYCONT ROL

| . -t lt ll !l lt tl lr li lt lt lt lt lt lt l

<-]-_-|F__--

- l ' + 8 vi i + l ? v

TH RE SHOL DCONT ROL E R

COI , IPARATOR

DCPO\vE Rq t l p p r v

brD-3210- 6 0 0 0

L . P . FCCNT ROL T R

EXPANDI R

TUNI. M

L O G I CLOuiERMD-3 2 I 7 1 0 0

i i i ii i I E 0 A R D r r u - \ / t t f - - - , c Y R o

l i T T Y i l n ; r 'ii | | | | '-----r----r-i ' - 4 4 - - ] i i I I Il i t I t t ) | l ,l l l c R T D R , ' E B . ^ R D I i i t . - - l t j , l 9 9 - " ] - s ! !i i l , - I i i

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M.DEL MRD-62 / MRD-68 TiTLE DrspLAy uNtT tNTERcoNNEcTtoN DTAGRAM

KODEN *oon B-EcTFoNrcs co., Lm.D''G No MD321o-J.Eool

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MD-321 0/3220 Servic€ Manual{z

7. DIAGRAMS

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RADAR I,sIKCI}I4

1. BIOCK DIAGRAU

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vSS: Ground (GND)98 , 101 , 105 , 107 . 110 , 114 , 1 ' 16 , 119 .125, 128, ',132

+5v: Not used in l '10-321-/3220. connected to56. 57, 58. 130

GND: Tes t p i ns , connec ted t o GND.3. 29. 54, 55, 75, 77. 1O4. 1O9, 112. 113.115, 133, 134Not used in l ' lD-321C/3220. connected to GND.49 (A6>

I4D-32IO / 3220 Service Manual-Ol A-I