SERVICE MANUAL Colour Television with =1’1’yo FILE NO Model NO. C20VTI I-M@ Videocassette Recorder (New Zealand / Oceania) Service Ref. No. C20VT11 -M@-00 w t, ; Contents Safety Precautions, X-Radiation Precautions ................. ~ Specifications ..................................................................... 1. Mechanical Disassembles 1-1. Cabinet back removal ............................................ 4 1-2. Chassis removal .................................................... 4 1-3. Video mechanism removal .................................... 5 1-4. Service procedure ................................................. 7 1-5. Replacement of the reel drive belt ........................ 8 1-6. Video mechanism disassemblies .......................... 8 1-7. Cassette mechanism assembly .............................11 2, Service Mode ................................................................l2 3. Power Circuit Protection and Self Diagnosis Display 3-1. Power circuit protection ........................................ 13 3-2. Power circuit problem self diagnosis .................... 13 3-3. VCR self diagnosis ................................................l4 4. ICS Pin Description 4-1. IC800 (CPU) pin description ................................. 15 4-2. IC1930 (DAC) pin description., .............................l5 5. Service Adjustments (TV Section) +15V/+1 15V, Vertical size/center, Focus adjustment..l 6 Grey scale, AGC, Horizontal center adjustment .........l7 Horizontal width adjustment, High voltage check ........ 18 Clock frequency confirmation .......................................l8 6. WF Adjustment ............................................................. 19 7. A7TAdjustment ............................................................2O 8. Purity and Convergence Adjustment ........................... 21 Product Code: 111321218 Original Version Chassis Series: TC2-A WE 9. VCR Main Mechanism Parts Location 9-1. Mechanism ass’y (Top view) .................................... 22 9-2. Mechanism ass’y (Bottom view) ............................... 23 9-3. Front loading mechanism .......................................... 23 10. Mechanism Dismantling and Reassembling 10-1. Cassette drive gear (Right) ................................... 24 10-2. Cassette drive gear (Left) ..................................... 25 10-3. COMPL motor bracket (Loading motor block) ..... 26 10-4. Tape loading mechanism ...................................... 29 10-5. Capstan motor ....................................................... 32 11. VCR Service Adjustments 11-1. Test points for tape path adjustment .................... 33 11-2. Location of adjustment point ................................. 33 11-3. Sewicejigs ............................................................ 34 11-4. Mode selector (VHJ-0050) handling instruction ... 35 11-5. Tape path adjustment ........................................... 37 11-6. Servo circuit adjustment ...................................... 39 11-7. Audio circuit adjustment ...................................... 39 11-8. Video still V-lock adjustment ................................ 40 12. Mechanism Maintenance and Checking 12-1. Periodic checking and maintenance items .......... 41 12-2. l_#mwo~e~roceed when the cassette cannot be ................................................................ 42 13. Cabinet Parts tist ........................................................... 43 14. Video Section Parts List ................................................ 44 15. TV Section Chassis Electrical Parts List ........................ 49 REFERENCE NO. SM 520130 ( E7WY)
70
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SERVICE MANUAL Colour Television with
=1’1’yoFILE NO
Model NO. C20VTI I-M@Videocassette Recorder (New Zealand / Oceania)
10. Mechanism Dismantling and Reassembling10-1. Cassette drive gear (Right) ................................... 2410-2. Cassette drive gear (Left) ..................................... 2510-3. COMPL motor bracket (Loading motor block) ..... 2610-4. Tape loading mechanism ...................................... 2910-5. Capstan motor ....................................................... 32
11. VCR Service Adjustments11-1. Test points for tape path adjustment .................... 3311-2. Location of adjustment point ................................. 3311-3. Sewicejigs ............................................................ 3411-4. Mode selector (VHJ-0050) handling instruction ... 3511-5. Tape path adjustment ........................................... 3711-6. Servo circuit adjustment ...................................... 3911-7. Audio circuit adjustment ...................................... 3911-8. Video still V-lock adjustment ................................ 40
12. Mechanism Maintenance and Checking12-1. Periodic checking and maintenance items .......... 4112-2. l_#mwo~e~roceed when the cassette cannot be
................................................................ 4213. Cabinet Parts tist ........................................................... 4314. Video Section Parts List ................................................ 4415. TV Section Chassis Electrical Parts List ........................ 49
REFERENCE NO. SM 520130( E7WY)
Safety PrecautionsAn isolation transformer should be connected in the powerline between the receiver and the AC line before any
service is performed on the receiver.
X- Radiation PrecautionsThe primary source of X-RADIATION in televisionreceiver is the picture tube. The picture tube is specially
constructed to limit X-RADIATION emission. Forcontinued X-RADIATION protection, the replacementtube must be the same type as the original including
suffix letter. Excessive high voltage may produce
potentially hazardous X-RADIATION. To avoid such
hazards, the high voltage must be maintain withinspecified limit. Refer to this service manual for specifichigh voltage limits. If high voltage exceeds specified limits,take necessary corrective action. Carefully follow the
instructions for + B1 volt power supply adjustment, and
high voltage check to maintain the high voltage within the
specified limits.
–2–
Specifications
TV section
Power source AC 110-240 Volts, 50/60 Hz.
Receiving system PAL(B/G, D/K, 1,M/M), SECAM(B/G, D/K,1,M/M), NTSC(B/G, D/K, 1,M/M)
Ext. terminals AV inputs:Video input (Phono jack) X 1 (1 .OVp- p, impedance 75 S2)Audio input (Phono jack) X 1 (142mVrms, impedance more than 47k S2)
AV output:Video output (Phono jack) X 1 (1 .OVP- p, impedance 75 S2)
Audio output (Phono jack) x 1 (142mVrms, impedance less than 1k Q )
Set dimensions
Set weight
VCR section
Format
Video signal
Video heads
Tape speed
Headphone jack: Mini. jack X 1
494(W) x 500(H) x 473(D)mm
approx. 23.0 Kg
VHS
PAL/MESECAM/NTSC
2 heads
PAUMESECAM:
SP: 23.39 mm/see.LP: 11.70 mm/see.
NTSC:
SP: 33.35 mm/see.LP: 16.67 mm/sec.(PIayback only)
EP: 11.12 mm/see.
Timer indication 24-hour indication
Power failure backup Approx. one hour
Specifications subject to change without notice.
–3–
1. Mechanism Disassembles
1-1. Cabinet Back Removal
1)Remove 9 screws.
2) Pull the cabinet back off and remove the cabinet back.
1II 1I
I II
IEL
--
1-2. Chassis Removal
1)Remove the cabinet back.
2) Remove 2 screws fixing the video mechanism.
3) Disconnect “KOS’’(Speaker lead) and “K6B’’(Degaussing Coil lead) on the Power/Deflection Unit.
4) Remove the chassis (Main Unit and Power/Deflection Unit) completely by sliding straight back.
Screw
K(
K6B”
Power/Def in Unit
-/
Video Mechanism
/
/
Screw
–4–
L 1-3. Video Mechanism Removal
1) Remove the chassis (Main Unit and Power/Deflection Unit) completely.
2) Remove the VIDEO UNIT by removing 2 screws.
3) Disconnect “K2A, “K213”, “K2D on the Main unit.
4) Take off lead wires and AC cord from clamps on the shield cover.
5) Separate the Main unit from the Power/ Deflection Unit.
. 6) Disconnect “KY” lead from the Main Unit.
Power/DeflectionUnit
L
7) Remove the shield
11 \
-’lI :rewwi
I
I #l
IIAC Cord “ Main Unit
Video Mechanism
cover by removing 3 screws.
Video Unit/
,KY
Shield Cover(Video Mechanism)
Screw
–5–
8) Remove the shield cover by removing 2 screws (screw-A).
9) Remove the screw-B.
IF
Sc
Shield
:rew-A
Cover
Main U
10) Remove 3 screws on the back of the Main unit.
11) Remove the Video Mechanism from the Main unit.
BACK SIDE
— Screw-B
—---=4Clamp
Screw
—Pre-amp. Unit
Slide the Video Mechanismto take off the clamps.
Video Mechanism
Main Unit
–6–
1-4. Service Procedure
1)Turn the Video mechanism 180 degrees, and set as illustrated bellow.
2) Reconnect “k2A, “K2B” and “K2D.
J/
wi:NZ ~ Ou_~ jla,Power/Deflection Unit
Video Mechanism II P
\ Turn 180 degrees
= Power/Deflection UnitMain Unit
–7–
1-5. Replacement of the reel drive beltBELT
1) Remove the Video Mechanism from the Main Unit.
2) Replace the reel drive belt,
\ JReel Drive Belt
. .
1-6. Video mechanism disassembles
1)Disconnect the flat cables from “CN9301” and “CN81 1”.
2) Remove the Pre-amp. unit by removing the screw.
3) Separate the Video Mechanism from the Main unit.
/Main Unit \\\\ f
\\&n3-a~deounit
~
CN811
–8–
4) Remove the screw-A (2 screws), screw-B and the screw-C.
.
5) Remove the screw-D (2 screws).
(Unlock by pressing the clamp-A~ Slide the cassette base in the direction of the arrow4 Remove the screw-D)
6) Remove the Video Mechanism from the mechanism holder.
Screw-A
Screw-B
Screw-A
Screw-C
99
\
\ 4
\ ~deoMec~ismHo,der
Cassette Base
>
Screw-D
I/
//
–9–
7) Remove the Cassette Door as follows.
Washer Spring
\
~-
d
Cassette Door
* \Cassette Door
8) Remove the cassette mechanism as follows.
@Remove two screws.
@Disconnect three connectors.
@Cut the wire band.@Remove the cassette mechanism by sliding and unlocking the two hooks.
Video Mechanism
Wire Band
Connector
FTE Head
Screw_—.
-Y&!!!%7Hook
Cassette
Mechanism
~ Cassette Door
Screw-
–lo–
1-7. Cassette mechanism assembly
1)Align the EJECT mode positioning alignment mark to the A positioning alignment mark.L
/ “<e;;%Dress the wires with the wireband
0
/
/
I\\
.
\
f
I1[ \Loading
II 1I/F
im888
\
\
\
11
//
0
–11–
2. Service Mode
Memory IC (IC81 O) replacement
Since part of adjustment data for the circuit is stored in the memory IC (IC81O) that comes with the CPU(IC800), the adjustment data of the service mode must be checked and re-input (1. PF+OO, 2.VF K+00)when the memory IC is replaced.
To enter the service mode
(1) Switch on the TV set.(2) Press and hold the 9 STOP button of the remote control transmitter or the TV set for more than 10 seconds.
STOP
* To exit from the service mode, switch off the
Service mode display
or
TV’s power
●*CC
STOP ‘
by pressing Power ON/OFF button.
ITo select an adjustment item, press the Programme UP/DOWN (PA, P V‘
DATA1.PF 01
/
UuuuMENU
RR--l
o ‘A
OK A+
8 0
mmcTn DAdjustment item Adjustment data
To change an adjustment data, press the VOLUME ( - +, a – ) button.
UuuuMENU
Ho ‘A
Table of the adjustment data
button.
-,d
Screen display Adjustment item Data Range of data Remarks
1.PF Power trouble diagnosis 00 o–3 See page 12
2.VF VCR self diagnosis 00 o–99 See page 13
–12–
3. Power Circuit Protection and 3-2.Power circuit problem self diagnosis
Self Diagnosis Display 1)Enter to the service mode by pressing and holding the- ■ STOP button for more than 10 seconds.
This unit display the results of the self diagnosis it carries
out in two digits on the screen when problems occur.Although these digits will only roughly tell you what kindof problems have occurred, use them when servicing theunit.
3-1. Power circuit protection
■ Detection of the TV section power failure
If the pin-22 of IC800(CPU) voltage is less than 1.5V
for more than 1.0 second.
1RL621 is opened
TV power is turned OFF {TV set goes to the standby
mode. However, VCR power is ON).G
■ Detection of the VCR section power failure
If the pin-23 of IC800(CPU) voltage is less than 1.5V
for more than 1.0 second.
*
VCR and TV powers are turned OFF.
2) Select” 1. PF” using the Programme UP/DOWN(PA/P V) button.
Service mode display
DATA1.PF 01
Self diagnosis results are as follows;
DATA
00
Problem
No problem
01 I TVsection power failure
02 I VCR section power failure
03 I Both of TV and VCR section power failure
Be sure to set the data of power failure to “ 00 “ after
■ To exit from the power circuit protecting mode,servicing.
Press the Power ON/OFF button of the TV set orthe remote control transmitter.
When the power is not turned on by pressing thePower ON/OFF button, repair the power circuit.
–13–
3-3. VCR self diagnosis
1) Enter to the service mode by pressing and holding the
■ STOP button for more than 10 seconds.
2) Select” 2. VF” using the Programme UP/DOWN(PA/P T) button.
Be sure to set the data “ 00 “ after servicing
using the VOLUME( A +, ~– )button.
VCR self diagnosis results
Service mode display
DATA2.VF 02
No. Problem Main Possible Cause Mechanism Operations and StateAfter Occurrence
00 No problem
The cylinder does not rotate. ● The cylinder motor is faulty. Shifts to the STOP mode.
01 ● The control of the cylinder motor isfaulty.
● The tape winds around the cylinder.
The take-up reel does not rotate. ● The take-up reel is caught. Shifts to the STOP mode.
02 ● The belt is faulty.● The take-up torque has decreased.
The capstan motor does not ● The capstan motor is faulty.03
Shifts to the STOP mode.rotate. ● The control of the capstan motor is
faulty.
The tape cannot be loaded with the ● Error in the operations of the tape Unloads, shifts to the INITIAL mode, andcassette inserted. loading mechanism.
04 (But unloading can be performed.)the power goes off.
● Foreign particles in the tape load- ingmechanism.
● The tape end sensor is faulty.● The reel brake of the tape cassette
has not been released.
The loading and unloading ● The tape guide is caught. The power is forcibly turned off with the
05cannot be performed with the ● The loading motor is faulty.cassette inserted.
mechanism at its current position.● The control of the loading motor is
faulty.
Front unloading cannot be ● The cassette holder mechanism is Front loads and shifts to the STOP or
06 performed when ejecting the faulty. INITIAL mode.
cassette. (Front loading can be ● The front door is caught. When the power switch is turned on
performed.) before eject operations: Shifts to theSTOP mode.When the power switch is turned offbefore eject operations: Shifts to theINITIAL mode and the power goes off.
Front loading and front unloading ● The tape cassette is caught in the The power is forcibly turned off with the07 cannot be performed when cassette holder mechanism.
● The gears of the front loading drivemechanism at its current position.
ejecting the cassette.mechanism have not engagedproperly.
The mechanism becomes 1 (BRAKE) ● The mechanism mode switch contact The power is forcibly turned off with the08 while moving from 2 (STOP, FF/REW), is faulty. mechanism at its current position.
3 (STILL), 4 (PIAY) and to 5 (IDLER).
The mechanism becomes 7 (INITIAL)● The mechanism mode switch contact Carries out tape takt+up operations,
while moving from 1 (BRAKE), 2 is faulty. shifts to the INITIAL mode, and the09 (STOP, FF/REW), 3 (STILL), 4(PLAY) power goes off.
and to 5 (IDLER).
–14–
4. ICS Pin Descriptions4-1. CPU pin descriptions (IC 800)
(1) Receive the monochrome circular pattern.(2) Set the brightness to normal and contrast to
maximum.(3) Adjust the focus control on the F.B.T for the
best focus on the screen center.
–16–
+1 15V Adjustment
‘ (1) Tune the receiver to an active channel./ (2) Set the Brightness and Contrast to
normal.(3) Connect Digital voltmeter to TP621 and
the ground.(4) Adjust VR621 for115V * 0,5V,
+15V Adjustment
(1) Tune the receiver to an active channel.(2) Set the Brightness, Contrast and Colour
to normal.(3) Connect Digital voltmeter to TP631 and
the ground.(4) Insert a video cassette to the VCR, and
set the recording mode by pressing theREC button.
(5) Turn off the TV set by pressing PowerON/OFF button.
(6) Adjust VR622 for 15V f 0.2V.
Vertical Size Adjustment
/(1)Receive the monochrome circular pattern.(2) Set the Brightness and Contrast to
maximum,(3)Adjust vertical size (VR51 O) control for full
scan.
rtical size
Vertical Center Adjustment
(1)Receive the monochrome circular pattern.(2) Set the Brightness and Contrast to maximum.(3) Adjust vertical centering using SW501.
rtical center
L
L
.
I%POWER / DEF. UNIT ou VR51 O
V-SIZE r
q
~il
g
oSW501V-CENTE
T400
D!l
“p -IL K6EF.B.T K4B
SCREEN f1
FOCUSE q,,, . ...0 n ~
TP452m
\Grey Scale Adjustment
(1) Receiver the monochrome circular pattern.(2) Set the brightness to normal, contrast to maximum.(3) Set the service switch (SW220) on the main unit at the service side.(4) Connect a oscilloscope to TP - 7C(+) and TP-7F(- ) on the CRT unit.
Using VR740 on the CRTunit, adjust “a” to be OV. -“=:v
(5) Set the drive volume (VR702 andVR712) at their mechanical center.(6) Set the bias volume (VR701, VR721 andVR711 ) to minimum. (fully counter
clockwise).(7) Turn the screen volume on the FBT to obtain just visible one coloured line.(8) Adjust each bias volume (VR701 - blue, VR721 - green and VR711 - red)
alternately until a dim white line produced.
(9) Set the service switch (SW220) at the normal side.(1O) Adjust the drive volume (VR702 - blue and VR712 - red) alternately to
produce normal black and white picture.(11 )Check for proper grey scale tracking at all brightness levels.NOTE: If the grey scale adjustment is made after picturetube replacement,
check the high voltage.
,
VR740
\CRT UNIT
MAIN UNITService Switch
E:,AS p ,*.-
VR721U’m
BGREEN BIAS
VR701BLUEBIAS
Q
km K7P
VR712RED DRIVE b TP-7F
oVR702
‘t
I
.BLUEDRIVEo ‘-~c‘K7M &o
(+) (-)
Oscilloscope
I 1-AGC Adjustment
Al 01
1 I
NOTE; Do not attempt this adjustment with weak signal.(1) Tune the receiver to most clearest (or strongest) VHF
station in your area. Set the brightness and contrastcontrols to maximum. Set the colour control tominimum.
(2) Set AGC (VRl 20) control to mid- range.(3) Turn AGC control in direction which causes snow to
appear, then in the opposite direction until the snowjust disappears.
\ Horizontal Center Adjustment
(1) Receive the monochrome circular pattern.(2) Set the Brightness and Contrast to normal.(3) Adjust VR351 for optimum horizontal center position.
ontal center
–17–
Horizontal Width Adjustment
\(1)Receive the monochrome circular pattern.(2) Set the Brightness and Contrast to
maximum.(3) If the picture is too wide+ Cut J401.
If the picture is too narrow* Short J401.
Important Note:If J401 is cut, its gap must be more than5mm to prevent sparks.
‘40’=0rethan5mm
High Voltage Check
(1)Connect a high voltage probe to anode leadof the picture tube.
(2) Receive the monochrome circular pattern.(3) Set the Brightness and Contrast to
maximum.(4) High voltage must be 25KV * 1KV.
MAIN UNIT
/
/
a
n
K2X
u
IC81 O
I
MEMORY -...
SW●
F=l”
II
POWER / DEF. UNIT
Clock Frequency Confirmation/
(1) Receive the most clearest station in your area.(2) Connect Quartz Counter to IC800 pin-1 9 and the ground.(3) Connect diode(l S1555) between IC800 pin-36 and IC800 pin-37.
IIC800(CPU)
DIODE (1S1 555)
(4) Disconnect the AC power plug from the mains to reset the CPU(IC800).(5) Reconnect the AC power plug to the mains, and switch on the TV set.
CPU is in the Clock Adjustment mode.(6) Confirm the OSC frequency is 32 Hz.(7) Disconnect diode from the CPU, and disconnect the AC power plug from the
mains to reset the CPU.Clock Adjustment mode is reset.
25 dBside bR124100mV/divPAL (with Jig-A side b)None
25 dBside bNot used1VldivPAL (with Jig-A side b)35dB
25 dBside bNot used1VldivPAL (with Jig-A side b)35 dB
Keep AGC voltage.Set the VIF Adjustor Sweepoff and pix. SG to CW output.Using T1 31, adjust DCvoltage to be 3.6V * 0.2V.
Fix the AGC voltage when the
overall waveform level is adjusted
at l. OVp-p.
Keep AGC voltage, and Confirm
the maker position P is near by
the reference line,
Adjustment
38.9MHz marker
f ./ referencelineWaveform
Output Probe JIG- A(System)33K Q a
~:.;.:.:.;.;.:.:.;.::\100 S2~Darnp!ng ,fieslstor
:: :::.. ::.::;’... .
\QYa
.Oscilloscope
Tuner TP w
uCN702
\oD vRI 24(Solder- Base side)
JIG-B(No Band)
MAIN UNIT 2.2K O
P
i
OFF 5V
2.2KQ12V
ON 5VI
pin
d181 4
@+T103
E
❑T101
●uouA== K2C
4-pinIC672 - Tuner TP
FL
–20–
8. Purity and Convergence Adjustment
L
.
‘L
.
w
CAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustment should bemade only after picture tube or deflection yoke replacement, following the steps below:
PURITY ADJUSTMENT1.Demagnetize the picture tube and receiver using an external
degaussing coil. When replacing picture tube or deflectionyoke, mount deflection yoke and purity - convergencemagnets assembly properly, see figures 1 and 4.
2.Turn Red and Blue guns off and provide only Green raster.Rotate Screen control to fully counterclockwise. Rotate Redand Blue Bias controls fully counterclockwise. Slowly rotateGreen Bias control clockwise to produce Green raster.
3. Loosen the screw holding the Deflection Yoke and removethe 3 Rubber Wedges, and slide the Deflection Yoke fullyfrontward.
4. Rotate and spread the Tabs of the two Purity Magnets tocenter the vertical green belt in the picture screen. The PurityMagnets are also adjusted to obtain vertical centering of theraster.
5.SIOWIY slide the Deflection Yoke backward until a uniformgreen screen is obtained.
6,Check the purity of the red and blue screens for uniformity,turn off other colours to check this (use bias controls).Readjust the yoke position if necessary until all screens arepure.
7.Adjust each Bias control and screen control to obtain whiteraster. Refer to Gray Scale Adjustment. If part of the picturescreen is coloured, adjust the Deflection Yoke positionforward or backward slightly.
FOUR- POLEMAGNET TABS
SIX- POLEMAGNET TABSA
PURITY V .MAGNETTABS
Figure- 1. PURITY AND CONVERGENCE MAGNETS
8. Tighten the mounting screw of the Deflection Yoke. AdjustConvergence next.
CENTER CONVERGENCE ADJUSTMENT1.Use a dot crosshatch pattern signal.2. Turn Red and Blue guns on and turn off Green gun. Adjust
the angle between the Tabs of the Four Pole Magnet 1and2,and superimpose the Red and Blue vertical lines in thecenter area of the picture screen. Refer to figure 2.
3. Keeping the mutual angle of the Tabs of the Four PoleMagnet turn them together to superimpose the Blue and Redhorizontal lines in the center area of the picture screen. Referto figure 2.
4. Turn Green gun on and adjust Six Pole Magnet 3 and 4s thatthe Green line superimposed on the Red/Blue lines.
This is the same procedure used in steps 2 and 3.Refer to figure 3.
OUTER AREA CONVERGENCE ADJUSTMENTSlightly loosen the screw holding the Deflection Yoke. Adjustthe Deflection Yoke to converge the detail in the outer area (leftside and right side) of the picture screen by orbital movement ofthe front of the Yoke, then secure the Deflection Yoke inappropriate position by putting the wedges as illustrated.Tighten screw holding the Deflection Yoke.
DEFLECTION YOKP
Figure- 4. ADJUSTMENT DEFLECTION YOKE
Adjust tabs angle to superimpose Adjust tabs angle to superimposeblue and red vertical line red/blue and green vertical line
J Adjust tabs together to J Adjust tabs together to
+’
I
“D\___ :’ __L / ~~~~~~~~f~d
+
GREEN I_
/
superimpose red/blue
\___ ~--_l- and green horizontal line
I IBLUE
I BLUE/RED
Figure-2 BLUE AND RED LINE MOVEMENT Figure-3 BLUE/RED AND GREEN LINE MOVEMENT
–21–
9. VCR Main Mechanism Parts Location
9-1. Mechanism Ass’y (Top View)
Note: Some models do not have the impedance roller, the FE head and the FE lever.
SENSOR LED
I
FE L
COMPL ROLLERBASE (S)
P ? ‘w/&
COMPL ROLLERBASE (T)
1
:
kg
BACK TENSION ~=BAND ASS’Y ~w
d.\ /
2
.-
LLAuw ACT PINCHSLIDE ASS’Y
c1 COMPL PINCH\w@J~
A ~ o ~~GIIDE
!-ACT SLIDE PLATE
dSUB BRAKE (T)
9
BRAKE CONT.o. . SLIDE
Q OA CONT. PLATELEVER
SUPPLY BRAKE ASS*Y
FRONT
–22–
L
9-2. Mechanism Ass’y (Bottom View)
Note: Some models do not have the capstan soft brake.
LOADING DRIVE HELlCAL GEAR
IICYLINDER EARTH ASS’Y
MODE CAM GEAR MAIN CAM GEAR
MECHA. MODE SWITCH\ / / DRUM MOTOR
9-3.
c
\ I I I / /I?’l/ . L i I I A. %
CAPSTAN SO=~wBRAKE
IH
REEL DRIVE II 0(%_ -y@
. COMPL LOADLINK (S)
‘J&lkLOAD‘ACK- FRICTION GEAR
ASS’Y
> RETURN TENSIONLEVER
BELT
v — “\ \ )
I \ \-
I \I
CHANGE CLUTCH CLUT)H \\ CONT. LEVER ASS’Y
LEVERSAFETY SWITCH (E. P SW)
‘EVER ‘Ss”y COMPL
Front Loading Mechanism IDLER CLUTCH
LEVER GEAR L
o
%
T. ENDSENSOR
L-shaDed hole
A\\ \w”- ‘“- PINIONT. TOP SENSOR _. ___
AD
---------- h,,
~Ep-SWITCH LEVER) / SWITCH I \ ~1 ~ ~/
IDLERMAIN GEAR
\ ]Y &&ETGEAR R IDLER GEAR PINION GEAR ASS’Y
–23–
10. Mechanism Dismantling andReassembling
10-1. Cassette drive gear (Right)
1. Removal
1)Remove the COMPL CASSEITE MECHANISM and
the GEAR BRACKET ASS’Y.
2) Remove the IDLER GEAR@.
3) Remove the SPRING COIL@, then remove the MAIN
GEAR @ .4) Remove the E-ring @, then remove the LEVER GEAR
ASS’Y R@.
2. Remounting1)Apply grease to the parts that undergo friction.
2) Align the positioning alignment hole@ of the IDLER –GEAR @with the positioning alignment hole@ of theSIDE BOARD.
3) Mount the LEVER GEAR ASS’Y R @ onto the axles 0and @. Align with the IDLER GEAR @ as shown in
Fig. A.
4) Mount the E-ring@ onto the axle@.
5) Mount the MAIN GEAR@ onto the [email protected] doing so, align it with the IDLER GEAR @ as
shown in Fig. A.
6) Hook the SPRING COIL@ to the notch@ in the MAIN ‘GEAR @ and the LEVER GEAR ASS’Y R.
7) Mount the IDLER GEAR@ onto the axle@.
When doing so, align it with the MAIN GEAR as shown
in Fig. A.8) Mount the GEAR BRACKET ASS’Y and the COMPL
3) Open the hook @ , then remove the LEVER GEARASS’Y L @ . Take care not to open the hook@ toomuch because it may get deformed or broken. If it
does, replace it.
4) Remove the SPRING COIL@ from the LEVER GEARASS’Y L@.
Positioning Alignment Marks
SLever Gear- ! \
@ Idler Gear L ~ Fig. B I
2. Remounting
1) Apply grease to the axle@ and shaft@.
2) Align with the COUPLE GEAR L @l and the IDLER
GEAR L @as shown in Fig. B.
3) Hook the SPRING COIL @ to the LEVER GEARASSV L@.
4) Mount the LEVER GEAR ASS’Y L @ onto the axle @and the shaft (@l. Align with the IDLER GEAR L @ asshown in Fig. B.
5) Mount the COMPL CASSEITE MECHANISM onto thechassis as instructed on page 11.
Note: The end of the DOOR OPEN LEVER @ leansagainst the front side of the CASSEITE DOOR @
as shown in Fig. A.
@lMor” Open Lever Fig. A I
‘coup’e’e~~..le?’Shaft / /
u ‘ -sisEsY+!$’~ayll~ @ Idler Gear L
\
@ Door Open Lever
@ H:ok @ Couple Gear L
/Q) E-Ring
CassetteDoor
Fig.10-2. Cassette Drive Gears (Left Side)
–25–
10-3. COMPL motor bracket (Loading motor
block)
10-3-1. COMPL motor bracket
1. Removal
1)Remove the COMPL VP-1 andBRACKET.
2) Remove the COMPL CASSEITE
instructed on page 5-10.
the PRE - AMP
MECHANISM as
3) Remove the two screws @ and the other one @, thenremove the COMPL MOTOR BRACKET @ . (See
Figure 10-3-l.)
2. Remounting
1) Set the mechanism chassis to the INITIAL mode.
In this mode, look at the mechanism chassis INITIAL
mode positioning alignment holes @ from above andalign the MAIN CAM @ and the MODE CAM @ INITAL
mode positioning alignment holes as shown in Fig. A.
6) Screw
Loadirm Motor
2) Set the COMPL MOTOR BRACKET @to the INITIAL
mode with the mode selector (VHJ - 0050). In this
position, the FRONT LOADING GEAR A positioning
alignment mark @) is aligned with the COMPL MOTOR _
BRACKET INITIAL mode positioning alignment mark
o. (See Fig. B.)
3) Align the ROTARY SWITCH (mode detector switch)@with the INITIAL mode positioning alignment mark @.
(See Fig. C.)4) Line up COMPL MOTOR BRACKET @ with
PROTUBERANCE@ and POSITIONING ALIGNMENTHOLE @ , and attach with two screws @ and one
screw @. (Refer to Fig. 10-3- 1.)
5) Mount the COMPL CASSEITE MECHANISM asinstructed on page 11.
6) Mount the COMPL VP - 1 and the PRE - AMP
BRACKET .
Note: Normal mechanism operation cannot be achieved ifINITIAL mode positioning of the MAIN CAM@, the
MODE CAM @ and the ROTARY SWITCH (modedetector switch) @ are not performed precisely.
-,
d%”=%+iiscr’w’?bO:kinolA1ignment
~ (@A “p~sitioni.g ‘9!.’ Alignment Marks ~ ,
I AIimne.t Mark hk%
Fici. A
@Main Cam I] @lNITIAL Mode Positioning
@ModeCam
.,, 1 1 .“. .W, . 1
@Protuberance
.L ------
Hole
, ~yroIurxxi3rwsFig. C
Bottom Viaw of ComDl Motorl
,@ Rot~rySwitch
Holes
@ INITIAL Mo
PositioningAlignmentMarks
L w 1,// \\ 1
Fig. 10-3-1 Compl Motor Bracket
–26–
,de
---‘J
10-3-2. Loading motor (See Fig. 10-3-2)
1. RemovalL
1)Use the MODE SELECTOR (VHJ-0050) to set the
mechanism to the INITIAL mode.
2) Remove the three screws@ and remove the HOLDERBRACKET @ with the FRONT WORM ASS’Y @ stillattached.
3) Remove the DAMPER @ attached to the pulley of theLOADING MOTOR @.
4) Remove the FRONT HELlCAL GEAR @.
5) Remove the soldered LEAD WIRE from the terminal ofthe LOADING MOTOR @.
6) Remove the LOADING [email protected]) Remove the LOADING MOTOR @ by lifting it up from
.the back.
2. Remounting
Before attaching the LOADING MOTOR @ to the
MOTOR HOLDER @, that confirm the DAMPER @ and
the DAMPER @ shown in Fig. 10-3-2. are in the proper
position on the MOTOR@ HOLDER@.
1) The LOADING MOTOR @ puts the protuberance@ inthe slit@of the MOTOR [email protected], mount the tap hole @ at two points on thefront puller side so that it is secured to the
PROTUBERANCE @ of the MOTOR HOLDER at twopoints.
2) Solder the lead wire from the MC -3 board to the
LOADING MOTOR @ terminal. (Solder the red leadwire to the positive terminal side.)
3) Hand the LOADING BELT@ on the pulley.
4) After hanging the LOADING BELT @) on the pulley,
confirm that the mechanism unit is in the INITIALmode. The INITIAL mode is indicated by Fig. A of Fig.10- 3-2., and is the position in which INITIAL modepositioning alignment holes of the MAIN CAM@ and
MODE CAM @are lined up with the THROUGH HOLE
@of the MOTOR HOLDER. If the INITIAL mode is not
selected, use the MODE SELECTOR (VHJ - 0050) tomake the required adjustment.
5) As shown in Fig. B, confirm the positions of the A
INITIAL mode positioning alignment mark (@) on the
FRONT LOAD GEAR and the INITIAL mode
positioning alignment mark @ of the MOTOR
HOLDER, as well as the position relationship of theRACK@ .
6) Apply a light coat of grease to all sides of the AXLE@and the FRONT HELICAL GEAR @.
7) Atiach the FRONT HELlCAL GEAR @to the AXLE@).As shown in Fig. C, the FRONT HELlCAL GEAR @ isattached so that the indent on the side is inside PIN@of the FRONT LEVER ASSY.
8) Attach the DAMPER @to the LOADING MOTOR @pulley.
9) The HOLDER BRACKET @l is attached by engagingthe FRONT WORM ASSY @ with the LOADING
MOTOR @ pulley, and held in place with three screws
@.10) Return the mechanism to the eject mode completion
position using the MODE SELECTOR.
–27–
‘9” D Rear View of Loading Motor 1
ing
Alignment MarkFirL B
A3 Illlp00 I@AINITIAL ModePositioningAlignment Mark
Ml=
o9A INITIAL Mode
o Positioning
@t3AcK41 Alignment Mark
—@ Front Helical Gear
Ficr. C
MC-3
Positioning
@ Front Helical Gear
Gi!?E$w....@pin = Indent
l%.,
[ @ Through Hole for
I / INITIAL positioni
@ Main @ Mode CamCam
Fig. 10-3-2.
—
Loading Motor
4
28 –
10-4. Tape loading mechanism
L 10-4-1. Main Parts of the tape loading
mechanism (See Fig. 10-4- 1.)
1. Removal
1) Remove connectors from the DRUM MOTOR board
(Sv- 5).2) Remove the three screws @ , then remover the
REINFORCE BRACKET @.
3) Remove the three special washers @ and @ , thenremove the spacer@, LOAD RACK@ and MAIN CAM
B.4) Unhook the LOAD GEAR T hook @, then remove the
LOAD GEAR T@) as shown in Fig. A, with the SPRING
COIL @ and the LOAD LEVER ASS’Y T @l attached toit.
5) Unhook the LOAD GEAR S hook @, then remove theLOAD GEAR S @ as shown in Fig. B, with the
. SPRING COIL @ and the LOAD LEVER ASS’Y S @attached to it.
Note: Take care not to open the LOAD GEAR hooks toomuch, because they may get deformed or broken.
If they are, replace them.
2. Remounting
1) Apply grease to the hole @) of the LOAD LEVERASS’Y S @, as shown in Fig. B.
2) Apply grease to the hole @ of the LOAD LEVER
ASSY T (@ as shown in Fig. A, and to the section of
the LOAD GEAR T@ as indicated with an arrow in Fig.
c.3) Apply grease to GROOVE 1, GROOVE 2 and to the
outer side of the MAIN CAM@, shown in Fig. E.4) Apply grease to the three oval holes of the LOAD
RACK @) as shown in Fig. D.
5) Apply grease to the outer surface of axles @,@ andm.
6) tier assembling as shown in Fig. B, mount the LOAD
GEAR S @onto the axle@ Insert the ROLLER BASE
S pin@ into the hole @of the LOAD LEVER ASSYs.
7) After assembling as shown in Fig. A, mount the LOAD
GEAR T O onto the axle@ .When doing so, align theINITIAL mode positioning alignment holes @ of theLOAD GEAR S @ and the LOAD GEAR T @ to the
INITIAL mode position. Insert the ROLLER BASE T pin@into the hole @of the LOAD LEVER ASS’Y T @.
8) Mount the MAIN CAM@ onto the axle@. At the sametime, be sure that the INITIAL mode positioningalignment holes @ of the MAIN CAM @ and the
MODE CAM @ match the INITIAL mode positioning
alignment holes @ of the MECHANISM CHASSIS.
Also check to be sure that the pin @ of the CAM
PINCH LEVER ASSY is in GROOVE 1 of the MAIN
CAM as shown in Fig. E.
9) Mount the LOAD RACK@) onto the axles@ [email protected] the same time, set the INITIAL mode positioningalignment marks @ of the LOAD RACK @ and the
LOAD GEAR T @to the INITIAL mode position. Insertthe LOAD RACK pin @ into the MAIN CAM GROOVE2 as shown in Fig. E.
10) Mount the spacer @ and the special washer @ onto
the axle @.11) Mount the two special washers @ onto the two axles
axles @).
12) Mount the REINFORCE BRACKET @ with the three
screws @.
13) Insert the connector into the DRUM MOTOR board
(Sv-5).14) Confirm that loading and unloading are performed
Instead of the internal batteries, an external DC 6V powersupply can be used.
11-4-1. Part names
Connection to the 26-pin connector of the relay board
0CONTACT SIDE(UPPER)
POWER SW
1 (26Pin)r 1,
WllE sELEcmRWiJ-0050
+6V
- BLANK/POWER DISPLAY
-MECHANISM MODE DISPLAY
\MODE SELECTION BUTTON
EXT. DC&t INPUT TERMINAL
–35–
11-4-2. Connection method 2) Connect a supplied 26-pin flat cable (VHJ-0064) of the
1) Remove the 29-pin flat cable extending from the mode selector (VHJ-0050) between the mode selector
COMPL MC-2 board connector (CN811 ) from the body and the 26-pin connector of the mode selector
connector of the system control circuit board, and relay board (VHJ-0094).
connect it to the 29-pin connector of mode selector Note: Care should be taken to avoid mistaking the –
relay board (VHJ-0089). direction of the contacting side when connecting a flexibleflat cable.
A’!JF%CN817 Loading Motor
\ CN811 ,
nl MC-3 Board/
Cable of Loadingk
To System Control
- Circuit Board
Connect to 29-pin Connector of
F VHJ-0094
VHJ-O050 Mode Selector
Flat Cable(26-pin)
29-pin
Jig: Mode Selector Relay BoardVHJ-0094 To Mode Selector
(VHJ-0050)
11-4-3. Handling method
1) The mode changes in sequence of EJECT, INITIAL,BRAKE, STOP/REW/FF, STILL, PLAY, IDLER, REVwhen the right side ( ~ ) of the mode selector button is
pressed.2) To change the mode from REV to EJECT, press the
left side ( + ) of the mode selector button to select thedesired mode.
3) In the mid position of each mode during a shift toanother mode, the “BLANK LED lights. But the“PLAY”, “IDLER”, “REV” LEDs light between theEJECT mode and the INITIAL mode. Be sure,therefore, to check the mechanism body to see justwhat state the mechanism is in. Incidentally, if themode selector is not connected to the mechanism, the“BLANK LED lights to indicate the power is ON.
4) The SLOW position of the POWER switch makesrelatively slow motions in comparison with theNORMAL position.
Note 1: The mode selector drives the loading motor only,not affecting the head drum motor and the capstan motor.When using the mode selector with a cassette loaded,turn the capstan motor manually to remove tapeslackness, preventing tape entanglement.Note 2: If the left side ( @ ) of the mode selector(VHJ-0050) key is kept pressed with the COMPLcassettemechanism removed, it might get the EJECTposition, causing the front helical gear and the front wormgear to get disengaged. In this condition, since the fronthelical gear will not turn even if the right side ( ~ ) of themode selector key is pressed, rotate (push) the front
– 36
helical gear clockwise by hand and engage it with thefront worm gear. As there is a misalignment between themechanism main body operation mode (indicated by themode selector indicator lamps) and the front loadingmechanism operation mode, keep the right side ( 4 ) ofthe mode selector key pressed until the front helical gearand the front loading gear of the front loading mechanismget back to the initial condition (Refer to A and B in figureon page ). When the front loading mechanism returnsto the initial condition, the operation mode of the whole +mechanism gets back to normal, matching the modeshown by the mode indicator lamps (mode EJECT wouldnot be properly indicated during eject).Sometimes, engagement of the front helical gear with thefront worm gear is delayed. The mechanism main bodygets too much ahead and the front loading mechanismmode cannot be switched to the initial condition. In thatcase, press the left side ( * ) of the mode selector key,setting the mechanism main body operation mode back toEJECT (rotation of the mode cam and the MAIN CAMstops).Note 3: The mode indicator lamps show the mechanismoperation mode, but the EJECT lamp may sometimes failto indicate the actual mechanism operation mode.When setting the mechanism to the EJECT or INITIALmode for dismounting or reassembling, fine adjustment ofeach gear and cam, etc., and marking positions isrequires after the mode indicator lamp has lighted up. Dothis with the mode selector switch in the SLOW position.
. 11-5. Tape path adjustment
11-5-1. Guide Roller Adjustment
Connection: Oscilloscope ~TP-182 (Pre-AMP. unit) and the ground .( Envelope)Oscilloscope ~TP-183 (Pre-AMP. unit) and the ground. (Switching Pulse)
Oscilloscope Oscilloscope
\/ [ PRE-AMP. UNIT ]
TP-183 @ @Tp-182 @TP-181
1IC9301
VIDEO PRE-AMP.
DCN9301
Adjustment:
-.(I) Playback the alignment tape (VHJ-0009), press the tracking control (Programme UP A /DOwN7 )buttonsand
adjust the envelope waveform to the maximum level.(2) Loosen the supply side and take-up side guide rollers by rotating them counterclockwise, then rotate them
clockwise alternately until a flat video output waveform is obtained.(3) Confirm that the envelope wavwform is not deformed. Check visually that no curling occurs at the guide roller upper
and lower flanges.(4) Press the tracking control (Programme UP A /DOWN V ) buttons and set the envelope waveform level to approx.
50% of the maximum. In this condition, confirm whether the envelope wavwform is flat. It will show valleys or peaksat the first half (supply side) or second half (take-up side) if the tape running position is too high or too low.In case there is unevenness in the first half (supply side), adjust the entrance side guide roller. If the second half(take-up side) shows trouble, adjust finely the take-up side guide roller.
[Normal],[ Normally, the waveform is flat ]
~oo low taperunning position]
moo high taperunning position]
[ Too low tape running position ontake-up side guide roller ]
[ Too low tape running position onsupply side guide roller ]
(Cross band)
[ Too high tape running position onsupply side guide roller ]
(Cross band)
[ Too high tape running position ontake-up side guide roller ]
–37–
11-5-2. ACE head adjustment
■ Height adjustment and azimuth adjustment.
Connection: Oscilloscope ~TP-182 (Pre-AMP. unit) and the ground.
Adjustment
(Envelope)Oscilloscope ~TP-183 (Pre-AMP. unit) and the ground.(Switching Pulse)
Special Nut for ACE Head HeightAdjustment
IOscilloscope C$Audio monitor out terminal and the groum
Azimuth Adjustment I
(1) Load the alignment tape (VHJ-0009) and set the PLAY mode.(2) Monitor the audio output waveform with the oscilloscope.(3) Rotate the azimuth adjustment screw until the audio output
waveform amplitude is maximum.(4) After loosening the ACE head height adjustment special nut,
rotate it slowly clockwke until amplitude of the audio outputwaveform is maximum, then adjust it finely clockwise to thepoint just before the said waveform amplitude begins todecrease.
Screw\ 1
(5) Rotate the azimuth adjustment screw until amplitude of theaudio output waveform is maximum.
(6) Confirm that the audio output waveform amplitude does not ‘/fluctuate. (Do not adjust as these screws have been fine
adjusted at the factory,)
■ Tracking (X value) adjustment
Connection: Oscilloscope ~TP-182 (Pre-AMP. unit) and the ground.(Envelope)Oscilloscope ~TP-183 (Pre-AMP. unit) and the ground.(Switching Pulse)Oscilloscope ~ Video monitor out terminal and the ground.
Adjustment:
(1) Load the alignment tape (VHJ-0009).(2) Referring to the “Guide Roller Adjustment” section of the this
Service Manual, set tracking to the center position.(3) Rotate the stopper bracket fixing screw 1800
counterclockwise.(4) Set the PLAY mode and monitor the video head output
envelope waveform.
(5) Adjust the stopper bracket position so that amplitude of theenvelope waveform becomes maximum at the tracking center.Confirm that the envelope waveform amplitude changes by thesame amount when shifting the tracking center by pressing the
tracking plus(+) and the tracking minus ( – ) buttons.(6) Tighten the stopper bracket fixing screw.(7) Model for LP mode tape speed capability:
Playback the alignment tape (VHJ-0052) and set the tracking tothe center using a tracking control button.Then confirm that the playback picture on the screen is normal.If not, make readjustment by referring to items (1) through (7).To readjust, playback VHJ-0009 and finely adjust the position ofthe stopper bracket within the range in which the amplitude ofthe envelope waveform can be held to a maximum.
(8) Do servo circuit PB PHASE (Switching position) adjustment.
Maximize the
I
Slottedenvelope Screwdriver – )wavwform after
setting to center/
with the tracking
button.
Stopper
Bracketd
Drum
Base(
Note: For models equipped with auto tracking,always set to the manual tracking mode beforeadjustment.
–38–
11-6. Servo circuit adjustment
■ NTSC switching position adjustment.
Connection: Oscilloscope (Channel 1) ~ Video Output Terminal and theground.Oscilloscope (Channel 2)~TP-183 (Pre-A!vlP. unit) and theground.
Adjustment:
(1) Load the alignment tape (VHJ-0006) and set the PLAY(SP)mode.
(2) Set the tracking control to the center position by pressing theTracking (Programme UP/DOWN – PA/P 7 )buttons.
(3) Set the Colour System to the NTSC system.(4) Adjust VR9200 on the main unit so that the width ‘T’ becomes
6.5H * 0.5H
W PAL switching position adjustment.
Connection: Oscilloscope (Channel 1) ~ Video Output Terminal and theground.Oscilloscope (Channel 2)~TP-183 (Pre-AMP. unit) and theground.
Adjustment:
(1) Load the alignment tape (VHJ-0009) and set the PLAY(SP)mode.
(2) Set the tracking control to the center position by pressing theTracking (Programme UP/DOWN – PA/P 7 )buttons.
(3) Set the Colour System to the PAL system.(4) Adjust VR9201 on the main unit so that the width ‘T becomes
6.5H f 0.5H.
w 11-7. Audio circuit adjustment
■ Bias level adjustment-A
Connection: AC Voltmeter4 TP9001 and TP9002(ground) on the mainunit.oscilloscope ~ TP9001 and TP9002(ground).Colour bar generator ~ Video Input Terminal
Adjustment:
(1) Insert the dummy plug into the Audio Input terminal.(2) Select the external AV mode by pressing the TV/AV selector.
. (3) Insert a video cassette tape(Blank), and set to the recordingmode(SP).
(4) After confirming on oscilloscope that a 70KHz sine wave isbeing output, adjust VR9001 (Bias Level) so that the ACvoltmeter’s reading is 21 mVrms.
.
T=6.5H f 0.5H4 ●
‘cH’] w + l~5H
Front edge of vertical >sync. signal
(CH2) ~k
d \RiseRF. Swit{hing Pulse
(CH1) T=6.5H A 0.5HE
Front edge of vertical ~sync. signal
JR Rise(CH2) RF. Switching Pulse
BIAS LEVELADJ. ,
+’CN301
J
VR9001 ~~o~l TP9002
w●usu
VR9202 VR9201
m
u
–39–
11-8. Video still V-lock adjustment
Adjustment:
(1) Input the monochrome circular pattern from the Video InputTerminal.
(2) Select the external AV mode by pressing the TV/AV Selector.(3) Insert a video cassette tape for recording, and set to the
recording mode(PAL~ SP, NTSC 4 EP).(4) Playback the just recorded portion, and press the Still button.(5) Press the tracking control(Programme UP/DOWN – P A P V )
button and adjust the raster to minimum vertical jitter.
*Adjust it in each mode. Firstly NTSC and PAL.
–40–
12. Mechanism Maintenance andChecking
12-1. Periodic checking and maintenance
itemsThe following maintenance and periodic checking procedures are recommended
to ensure proper operation, and to protect the tape from dirt and damage. Also,these procedures should always be followed after repairing the unit.
■ Periodic Check Items
O Cleaning @ Confirmation A Lubrication
TapeGuide
System
Tape runningsurfaces
ACE head
I Drum (cylinder)
Drive
b
Intermediate gear,System pulley axles
Capstan axles
Loading motor
Perfor-manceCheck
Back tensiontorque
Brake system
FF, REW, REV,PIAY torque
$000 4500 5000 Remarks
o 0 0
010101Head life
o depends heavilyon operatingconditions.
@
@
A Absolutely avoidoil on taDe
1A running ‘surfaces,
FWD: 600g-cm and over
@REW :750g-cm and overPLAY:100to 160 g-cmREV :150 to 240 g-cm
Note : The back tension torque is the value that has been measured by the casse~e
torque meter (VHJ - 0016). The torque of FF, REV, REW, and P~Y represent
values measured when locked by the torque gauge. FF and REW are values
2 seconds after starting.
–41–
12-2. How to proceed when the cassette cannot be removed
The cassette cannot be removerd.
11
Find the cause of trouble and repair it. (Tryturning the loading motor by hand, etc.)
1 NG
I Connect the mode selector and keeD theIleft side ( * ) of its mode selecto~ key NGpressed to unload. Remove the mechanism main unit as
Stop when the roller guide gets into the eXDlainedin the Daae 7 – 8.
cassette lower part. (Stop before frontunloading starts. Be careful not to tangle upthe tape.)
I
Turn the capstan motor by hand from thebottom side to remove tape slack.
I
iKeep the left side (*) of the mode selectorkey pressed to prefrom front unloading.
tIn the eject completed mode, remove thecassette.
=
Confirm the position of each gear, cam,mode detection switch etc in the initial
End
Before unloading
Perform unloading using the mode selector.
Remove the holder bracket and the fronthelical gear as explained in the page 28.(Do this with the COMPL cassette
D
]e Figure asmechanism and the COMPL MOTOR
lowsBRACKET still attached to the mechanismmain body.)
Ii
w
Remove the COMOL MOTOR BRACKETas explained in the page 27. (Be sure not toremove the COMPL cassette mechanism. Ifremoved in this condition, the tape wouldbe damaged.)
tTurn the main cam clockwise with your
~ws hand from the bottom side. Stop when theroller guide gets into the cassette lowerpart.
~
Turn the capstan motor by hand from thebottom side to remove tape slack.
+Push the COMPL cassette mechanism rack
I in the front unloadinq direction.II L t
After unloading
First rotate the capstan motor by hand from thebottom to take- up the tape slack, and performfront- unloading using the mode selector.
–42–
13. Cabinet Parts List
Note : Parts order must contain Service Ref. No., Key
“Service Ref.No.” is shown on the rating iabeiNo., Parts No., and Description.
CARBON 270 JA l/6WCARBON 270 JA l/4WCARBON 100 JA l/6WCARBON 100 JA l/4W
SPECIAL SWITCH
–48–
E7WY
15.TV Section Chassis Electrical Parts List
w
w
.
u
Product safety should be considered when a component replacement is made in any area of a receiver.Components indicated by a ~ mark in this parts list and the circuit diagram show components whose value havespecial significance to product safety. It is particularly recommended that only parts specified on the following partslist be used for components replacement pointed out by the mark.
Note: Part order must contain Service Ref. No, ,Parl No.,and descriptions, The main PCB unit will be supplied without tuner andflyback transformer. They should be ordered separately.
Read description in the Capacitor and Resister as followsCAPACITORCERAMIC
T
100P K
[
I
50V~ Rated Voltage
—Tolerance SymbolsLess than 10PFk Not specified B: ~ o.IPFD: t 0.5PF F*l PFR: +0.25-OPF S: +0- 0.25PFMore than 10PFk Not specified B *0.1%D: t 0.5% F: *1%H: i 3% J: *5%L: f15% M: Y 20%P +100-0% Q: +30- 10%u: +75- 10% v: +20- 10%x: +40- 20% Y. +150-10%
Matjria,, ~ Rated “alue:f%pico farad, U. Micro fared
CERAMIC .............CeramicMT- PAPER ,.,,... MetallizedzedPaperPOLYESTER..., PolyesteresterMT- PO LYEST ......Metallized PolyesterPOLYPRO .............PotvwoKwieneMT- POLYPRO .....Me~allized PolypropyleneCOMPO FILM ........Composite filmMT- COMPO, ........Metallized CmpositeSTYRENE .........StyrenereneTA- SOLID ............Tantalum SolidAL- SOLID ............Aluminium SolidELECT ..................ElectrolyticNP- ELECT ...........Non- polarized ElectrolyticOS- SOLID ...........Aluminium Solid with Organic
4.7U M 50V82P J 50V220U M 10V10U M 16V22U M 16V22U M 16V22U M 16V22U M 16V47U M 16V47U M 16V100U M 16V2.2U M 50V2.2U M 50V2.2U M 50V2.2U M 50V2.2U M 50V10U M 16V10U M 16V
O.047F Z 5.5V220U M 10Vo.Olu z 50V0.01u z 50V0.01u z 50V27P J 50V18P J 50V10U M 16V
O.lu z 50Vo.Olu z 50V100U M 16V
—54—
E7WY
.
w
.
Ref. No. Part No. Description Ref. No. Part No. Description
82K JA l/10W150 JA l/6W47 JA l/10W47 JA l/10W47 JA l/10W47 JA l/10W390JA l/4w820JA l/6W680JA l/6W1.2KJA l/low27 JA l/6W470 JA l/4W5.6K JA l/6W10K JA l/6W15KJA l/low27K JA l/10W22KJA l/low270K JA l/6W22KJA I/low22KJA l/low22K JA l/6W6.8K JA l/6W10KJA l/10W
3.3KJA l/low4.7K JA l/10W47K JA l/10W8.2KJA l/10W1.2K JA l/10W220K JA l/6W3.9K JA l/4W47K JA l/6W4.7K JA l/10W22K JA l/10W
0.000 ZA l/10W5.6KJA l/10W100 JA l/6WlKJA l/6WlKJA l/6W
22K JA l/6W27K JA l/10W47K JA l/6W4.7K JA l/10W2.7K JA l/10W33K JA l/10W10KJA l/10W
0.000ZA l/10W1.8KJA l/low270JA l/10W
0.000ZA l/10W0.000 ZA l/10W0.000 ZA l/10W1.8KJA l/low1.8KJA l/low1.8KJA l/low120JA l/low
3.3KJA l/lowlK JA l/10W12KJA l/lowlOOK JA l/10W10K JA l/10W10KJA l/10W10KJA l/10W12K JA l/6W}2K JA l/6WlKJA l/10W
10K JA l/10W39K JA l/6W10K JA l/6W12K JA l/6W33K JA l/6W12K JA l/6W22K JA l/6W22K JA l/6W27KJA l/10W10K JA l/6WlOOK JA l/10WlOOK JA l/10WlOOK JA l/10W27K JA l/6W27K JA l/6W22K JA l/6W10K JA l/10W33K JA l/6W1.8KJA l/low100JA l/10W100JA l/10W100JA l/10W100JA l/10W100JA l/10W100JA l/10W330JA l/low330JA l/low330 JA l/10WlKJA l/10W180JA l/lowlOOK JA l/10W
0.000 ZA l/10W470 JA l/10W10K JA l/6W180K JA l/6W10K JA l/10W47K JA l/10W22K JA l/10W22KJA l/low47KJA l/low15KJA l/low
4.7K JA l/10W15K JA l/10W
4.7K JA l/10W22KJA l/low39K JA l/6W390 JA l/4W33K JA l/6W47K JA l/6W680 JA l/10W33K JA l/6W18KJA l/low220 JA l/6W220 JA l/6WlKJA l/10W
220 JA l/6W3.3KJA l/low220JA l/low10KJA l/10W
3.9KJA l/low22K JA l/10W4.7K JA l/6W100 JA l/6W22K JA l/10W390K JA l/10W100 JA l/10W22K JA l/6W22KJA l/low
0.000 ZA l/10WR361 401 0145201 CARBON 15K JA l/4W
.
.4
.
.
d
—56—
E7WY
—
—
Ref. No. Part No. Description Ref. No. Part No. Description
OX10E-MT 5.6K JA 2WWIRE WOUND 4.7 KA 5WCARBON 47 JA l/6WCARBON 220K JA l/6WOXIDE-MT lKJA lWOXIDE-MT lKJA 2WFUSIBLE RES 1 J- l/2WFUSIBLE RES 1 J- l/2WCARBON 100K JA l/2WCAR80N 10K JA l/4WCARBON 68K JA l/2WOXIDE-MT 0.47JA lWCARBON 1 JB l/4WCARBON 270JA l/2WOXIDE-MT lKJA lW
401 0648603 OXIDE-MT lKJA 2WR502 401 0067602 CARBON 1 JA l/2WR503 401 0253807 CARBON 180 JA l/6W
6.8K JA l/6W2.2K JA l/6W2.2K JA l/6W4.7K JA l/6W820 JA l/4W120K JA l/2W120K JA l/2W1.8KA 5W6.8 JA 2W100K JA l/2W5.6K JA l/6W15K JA l/4W39 JA 2W22K JA l/6W3.3K JA l/6W330 JA l/4W3.3K GA l/4W100 JB l/4WlKJA l/6W
4.7K JA l/6W100K JA l/2W1.8JB l/4w10K JA l/6W33K JA 2WlKJA 2W10K JA l/6W4.7K JA l/6W6.8K JA l/6W5.6K JA l/6W7.5K JA l/6W22K JA l/6WlKJA l/6WlKJA l/6W
2.2K JA l/6W100K JA l/2W100K JA l/2W22K JA l/6W2.7 KA 5W3.3KJA lW3.3KJA 2W3.3KJA lW100K JA l/4W2.7K JA l/6W18JA 5W
5.6M KA l/2W5.6M KA l/2W10K JA l/6WlKJA l/6W
27K JA l/6W10K JA l/6W82 JA 2W10K JA l/6W680 JA l/6W10K JA l/6W27K JA l/6W680K JA l/6W39K JA l/6W39K JA l/6W10K JA l/6W
5.6K JA l/6W100 JA l/6W100K JA l/6W10K JA l/6W27K GA l/4W82K GA l/4W100K JA l/4W4.7K JA 5W3.9K JA 2WlKJA l/6W
27K JA l/6W
—62—
E7WY
.—
Ref. No. Part No. Description
R685 401 0247400 CAR80N 10K JA l/6WR686 401 011 5501 CAR80N 820 JA l/2WR687 401 0231706 CARBON 820 JA l/4WR688 401 0254200 CAR80N 1.8KJA l/6WR689 401 0272303 CAR80N 560 JA l/6WR690 401 0272303 CAR80N 560 JA l/6WR691 401 0247004 CAR80N lKJA l/6WR692 401 0258208 CAR80N 22K JA l/6WR693 401 0220908 CAR80N 68JB l/4wR697 4020222008 FUS18LE RES 1 J- l/2WR698 401 0231706 CAR80N 820 JA l/4W