SERVICE MANUAL Colour Television Specifications Power Source . . . . . . . . . AC220-240V, 50Hz/60Hz. Colour System . . . . . . . . PAL (AV Input: PAL/NTSC4.43/NTSC/PAL-60Hz) Television System . . . . . . B/G Channel Coverage . . . . . VHF: E2-E12 UHF: 21-69 CATV: S1-S41, X, Y, Z, Z+1, Z+2 Video IF . . . . . . . . . . . . . . 38.0MHz Aerial Input Impedance . . 75Ω Ext. Terminals Video inputs: Phono jack x 2 (1Vp - p, 75Ω) S-Video inputs: Din 4 pin x 1 (Separate Y/C signal input) Audio inputs: Phono jack (L/R) x 2 (436mVrms, more than 40KΩ) Video monitor outputs: Phono jack x 1 (1Vp - p, 75Ω) Audio monitor outputs: Phono jack (L/R) x 1 (436mVrms, less than 600Ω) Headphone jack: Mini stereo jack x 1 Speaker . . . . . . . . . . . . . . 5 cm x 12 cm x 2 pcs. Sound Output (RMS) . . . . 5W + 5W Dimensions . . . . . . . . . . . 587.5 (W) x 596.5 (H) x 488.5 (D)mm Weight . . . . . . . . . . . . . . . approx. 21.3 Kg Specifications subject to change without notice. Product Code: 111351417 Original Version Chassis Series: FC3-A C2GW FILE NO. Model No. CP21AF2X Service Ref. No. CP21AF2X-00 (Australia) Give complete “SERVICE REF. NO.” for parts order or servicing. It is shown on the rating plate at the cabinet back of the unit. This T.V. receiver will not work properly in foreign countries where the television transmission system and power source dif- fer from the design specifications. Refer to the specification table. 0 7 1 4 8 5 2 3 6 9 P▲ P▼ JXMYA -/-- P P TV/AV A B CH SCAN TIMER MENU PIC MODE SWAP BASS SURROUND REFERENCE NO. SM5110420 - + P MENU TV/AV
28
Embed
SERVICE MANUAL Colour Television Model No. CP21AF2Xcncms.com.au/SANYO-SMs/Consumer-Electronics/CRT-Television/cp21af2x/cp...Contents-2-Safety Notice . . . . . . . . . . . . . . . .
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Video inputs: Phono jack x 2 (1Vp - p, 75Ω)S-Video inputs: Din 4 pin x 1 (Separate Y/C signal input)Audio inputs: Phono jack (L/R) x 2 (436mVrms, more than 40KΩ)Video monitor outputs: Phono jack x 1 (1Vp - p, 75Ω)Audio monitor outputs: Phono jack (L/R) x 1 (436mVrms, less than 600Ω)Headphone jack: Mini stereo jack x 1
Speaker . . . . . . . . . . . . . . 5 cm x 12 cm x 2 pcs.Sound Output (RMS) . . . . 5W + 5WDimensions . . . . . . . . . . . 587.5 (W) x 596.5 (H) x 488.5 (D)mmWeight . . . . . . . . . . . . . . . approx. 21.3 Kg
Specifications subject to change without notice.
Product Code: 111351417
Original Version
Chassis Series: FC3-A
C2GW
FILE NO.
Model No. CP21AF2X
Service Ref. No. CP21AF2X-00
(Australia)
Give complete “SERVICE REF. NO.” forparts order or servicing. It is shown on therating plate at the cabinet back of the unit.
This T.V. receiver will not work properly in foreign countries where the televisiontransmission system and power source dif-fer from the design specifications. Refer tothe specification table.
1: An isolation transformer should be connected in thepower line between the receiver and the AC linewhen a service is performed on the primary of theconverter transformer of the set.
2: Comply with all caution and safety-related notes pro-vided on the cabinet back, inside the cabinet, on thechassis or the picture tube.
3: When replacing a chassis in the cabinet, always becertain that all the protective devices are installedproperly, such as, control knobs, adjustment coversor shields, barriers, isolation resistor-capacitor net-works etc.. Before returning any television to thecustomer, the service technician must be sure thatit is completely safe to operate without danger ofelectrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-structed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must bethe 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 maintained within specified limit. Refer to this ser-vice manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, takenecessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high volt-age check to maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE
Product safety should be considered when a component replacement is made in any area of a receiver.Components indicated by mark in the parts list and the schematic diagram designate components in whichsafety can be of special significance. It is particularly recommended that only parts designated on the parts listin this manual be used for component replacement designated by mark . No deviations from resistancewattage or voltage ratings may be made for replacement items designated by mark .
-3-
Chassis Block Diagrams
130V
24V
28V
13V
9V 9V 5V
36V
FB
TT
UN
ER
HO
RIZ
. DE
F.V
ER
T. D
EF.
MA
IN S
OU
ND
AM
P.
SU
RR
OU
ND
. AV
SW
AU
DIO
CT
L / 1
CH
IP IC
CP
U /
EE
PR
OM
PO
WE
R S
UP
PLY
CIR
CU
IT
A10
1T
UN
ER
SA
W
FIL
TE
R
X16
1A
IF IN
5/6IC
201
IF/V
IDE
O/C
HR
OM
A
VID
EO
/(S
-Y)
IN19 20 21
R-O
UT
B-O
UT
G-O
UT
IC28
1S
EC
AM
6 7
R-Y
OU
T
B-Y
OU
T
35 34
IC50
1V
ER
T. /D
EF.
23 27
VE
RT.
OU
T
HO
RIZ
. OU
T
15
IC80
1C
PU
T47
1F
BT
HE
ATE
R
PC
C
CIR
CU
ITQ
461-
Q46
2
Q43
1H
-DR
IVE
Q43
2H
-OU
T
HV
L902
DY
CR
T U
NIT
CR
T
T43
1H
-DR
IVE
TR
AN
S.
HV
FO
CU
S
SC
RE
EN
IC70
1T
RIP
LE
VID
EO
O
UT
PU
T A
MP.
R BG
1 2 3
9 8 7
R BG
D19
10LE
DA
1901
AR
C R
EC
EIV
ER
FR
ON
T
CO
NT
RO
L K
EY
SS
W19
01~
SW
1906
IC80
2E
EP
RO
M43
65SDA
SCL
3212
28
ON-TIMER
RC-IN
KEY-IN
REAR AV1 INPUT TERMINAL F
RO
NT
AV
2 IN
PU
T T
ER
MIN
AL
VID
EO
MO
NIT
OR
OU
T
AU
DIO
MO
NIT
OR
OU
T(L
EF
T)
AU
DIO
MO
NIT
OR
OU
T(R
IGH
T)
46 44
VID
EO
OU
T
S-C
IN
42
AV
1
AV
2
VID
EO
IN
AU
DIO
IN (
LEF
T)
AU
DIO
IN (
RIG
HT
)
VID
EO
IN
AU
DIO
IN (
LEF
T)
AU
DIO
IN (
RIG
HT
)
SP
901
SP
902
IC00
1 A
UD
IO A
MP.
7 12
4 2
IC37
01
AU
DIO
CO
NT
RO
L /
SU
RR
OU
ND
23 8
R L
2F
M O
UT
(TV
OU
T)
2/5
1/3
L/R
, L/L
,R/R
SW
151 30
4
L RL-
OU
T
R-O
UT
IC37
02
52 54
SIF
OU
T
SIF
IN
K00
1H
EA
DP
HO
NE
JA
CK
IC12
01A
UD
IO-S
W
11
13
152
3
4
1/5
L-O
UT
R-O
UT
IC15
01V
IDE
O S
WIC
1401
VID
EO
-SW
9 6
4
172
15
1 13 12
14
54
3
INT. VIDEO EXT. VIDEO
VID
EO
M
ON
ITO
RO
UT
Y
EX
T.
VID
EO
AV
1 V
IDE
O IN Y-IN
C-I
N AV2 VIDEO IN
12/1
4A
V1
AV
2
S-T
ER
MIN
AL
Y-IN
C-I
N
14
VID
EO
IN
1H DLRGB
MATRIX
1920
21
OSD R-OUT
OSD B-OUT
OSD G-OUT
OS
D R
-IN
OS
D B
-IN
OS
D G
-IN
14 15 16
MAIN SIGNAL PROCESSING CIRCUIT
(Not
equ
ippe
d)
* N
ot e
quip
ped
-4-
Chassis Block DiagramsSYSTEM CONTROL
12K
EY
SW
ITC
H IN
KE
YS
WIT
CH
TV
/AV
SW
ITC
H
(TV
=LO
W,
AV
=H
IGH
)
SC
L2 1 31
SD
A
PO
WE
R O
N/O
FF
PH
OT
O C
OU
PLE
(O
N=
HIG
H, O
FF
=LO
W)
IC20
1IF
/VID
EO
/ C
HR
OM
A/D
EF
.
IC80
1C
PU
QX
XA
VC
044P
22 19 20 21 18 17 273
476322823 33
OS
D B
LK O
UT
(Act
ive=
Hig
h)
OS
D R
ED
OU
T(A
ctiv
e=H
igh)
OS
D G
RE
EN
OU
T(A
ctiv
e=H
igh)
OS
D B
LUE
OU
T(A
ctiv
e=H
igh)
DE
FLE
CT
ION
CIR
CU
IT
HO
RIZ
. SY
NC
IN (
AC
TIV
E=
LOW
)
VE
RT
. SY
NC
IN (
AC
TIV
E=
LOW
)
PO
WE
R P
RO
TE
CT
IN
(P
OW
ER
ER
RO
R=
LOW
)P
OW
ER
CIR
CU
ITet
c.
SCL
SDA
IC80
2M
EM
OR
Y
OS
CX
801
32.7
68K
Hz
CP
U O
SC
OU
T
CP
U O
SC
IN
LED
ON
-TIM
ER
LE
D O
UT
(ON
TIM
ER
ON
=Lo
w)
RC
SIG
NA
L IN
(AC
TIV
E=
HIG
H)
RC
PR
E-A
MP
.
24 26
IC00
1A
UD
IO A
MP
.
VIF
-M O
UT
PU
T (
HIG
H=
NT
SC
3.58
, LO
W=
OT
HE
R)
A10
1F
/S T
UN
ER
AF
T S
IGN
AL
INP
UT
10
RE
SE
T IN
PU
T (
AC
TIV
E=
LOW
)13
MU
TE
OU
TP
UT
(MU
TE
ON
=H
IGH
)29
AV
1/A
V2
SW
ITC
H(A
V1=
LOW
, AV
2=H
IGH
)
IC12
01A
UD
IO S
WIT
CH
56
SE
CA
M K
ILLE
R IN
PU
T (
HIG
H=
SE
CA
M)
IC37
01A
UD
IO C
ON
TR
OL
&S
UR
RO
UN
D13
14
11 10
IC14
01V
IDE
O S
WIT
CH
8
1112
IC37
02L/
R, L
/L, R
/R
SW
ITC
H9
1710
18
9
IC15
01V
IDE
O S
WIT
CH
113
(AV
1=LO
W,
AV
2=H
IGH
)
(Y =
LOW
, A
V V
IDE
O=
HIG
H)
(Y =
LOW
, A
V V
IDE
O=
HIG
H)
10
(IN
T. V
IDE
O =
LOW
, E
XT
. VID
EO
=H
IGH
)
-5-
IC Block DiagramsIC201 < IF/Video/Chroma/Def. > LA76818
1
DC
VO
L
SW F
MD
ET
23
45
6
IFA
GC
RF
AG
C
VIF
78
910
IFV
CC
5V11
1213
BU
S
PE
AK
ING
CO
RIN
GB
LAC
KS
TR
ET
CH
SY
NC
SE
P
1415
AB
L
DC
RE
ST
CLA
MP
OS
DC
ON
TR
AS
TB
RIG
HT
1617
1819
20
CO
NT
RA
ST
BR
IGH
TR
GB
MAT
RIX
OS
DS
W
DR
IVE
/OU
T-OF
F
VC
C21
2223
FS
C/
SY
NC
SW
2425
2627
VE
RR
AM
PH
OR
VC
CHV
CC
VE
RC
/D
HO
RO
UT
PH
AS
ES
HIF
TE
R
AF
C2
AF
C1
VE
RS
EP
HO
RC
/D
1/256
CO
LOR
CLA
MP
LPF
ALC
+S
WC
LAM
P
DE
MO
PAL
SW
AC
C
BP
FO
N/O
FF
DE
LAYLIN
E
SW
TR
AP
AF
TV
IDE
OD
ET
TR
AP
LIMA
MP
BP
F
SP
LL
BP
F
VID
EO
AM
P
IFID
EN
TV
IDE
O
SW
AP
C1
TIN
T
VX
OD
DS
AP
C2
DC
AD
S.
CLA
MP
VC
O
1H D
ELAY
HO
RV
CO
FB
P
2829
3031
321H
VC
C
3334
3536
3738
3940
4142
CLM
P
4344
45
CLM
P
V/C
VC
C5V
4647
4849
50
A2C
PLL
5152
5354Audio Output
FM Output/Selected Audio Output
PIF AGC
RF AGC Output
PIF Input1
PIF Input 2
IF Ground
IF Vcc
FM Filter
AFT Output
Bus Data
Bus Clock
ABL
Red Input
Green Input
Blue Input
Fast Blanking Input
RGB Vcc
Red Output
Green Output
Blue Output
fsc output or CSync output
Vertical Output
Ramp ALC Filter
Horizontal/BUS Vcc
Horizontal Output
Horizontal AFC Filter
Flyback Pulse Input
VCO IREF
Clock (4MHz) Outupt
CCD Vcc
CCD Filter
CCD/Horizontal Ground
SECAM B-Y Input (Cb Input)
SECAM R-Y Input (Cr Input)
Chroma APC2 Filter
Clamp Filter
4.43 MHz Crystal
Chroma APC1 Filter
Selected Video Output
Video/Vertical/BUS Ground
External Video Input(Y-IN)
Video/Vertical Vcc
Internal Video Input (S-C IN)
Black Level Detector
Video Output
VCO Filter
VCO Coil 2
VCO Coil 1
APC Filter
Ext. Audio Input
SIF Output
SIF APC Filter
SIF Input
IC Block Diagrams
-6-
IC201 <IF System Block Diagram> LA76818
1112
BU
SIn
terf
ace
SA
W
5 6 4 8 7
PIF
In1
PIF
In2
IF In
9V
30K
RF
AG
CO
ut
120K
IF V
CC
IFG
ND
VIF
AM
P
VIF
1V
IF 2
VIF
3
IF A
GC
D
rive
RF
AG
C2n
dIF
AG
C
RF
AG
CD
elay
6bit
IF A
GC
Def
1bit
+ - (6 V
cc)/
7
To BU
S
3
0.02
2uP
IFA
GCIF
AG
C
Dat
aC
lock
AP
CD
et
+π/
4
-π/4
Snd Det
Am
p
52S
IF.O
ut
Sou
ndTr
ap
Vid
eoD
et
Buz
zC
ance
ller
50A
PC
Filt
er33
00.
47u
+
PLL
Pul
l-in
SW
To BU
S
Lock
Det
Vid
eo.L
evel
3b
it
Am
p54
10p
SIF
.In
Sou
ndB
PF
VC
O.C
oil
VC
OC
OIL
1V
CO
CO
IL2
4849
VIF
VC
OC
hrom
aC
ount
er
B/N
INV
IFId
ent
OS
CC
/D
Am
p
SIF
. Sys
2bit
pre-
scal
ler
SIF
VC
O
500K
BP
FSIF
AP
CF
ilter
1K
0.01
u10
00p
53LI
MA
MP
FM
Det
FM
.Lev
el5b
it
Chr
oma
C/D
AP
CD
et
500K
Det
To BU
S
Chr
oma
VC
O VIF
Cou
nter
Res
etP
ulse
VC
OId
ent
VIF
.Sys
2bit
Pha
seD
etec
tor
A.M
UT
E1b
itV
OLU
ME
D/A
VO
LUM
EF
ilter
A.S
W1b
itInpu
tS
elec
tV
OLU
ME
(AT
T)
-+
-+
2.5V
Am
p
FM
Gai
n1b
itD
eem
-TC
1bit
De-
emph
FM
Mut
e1
bit
2 9 46 51 1
A.F
il.D
ef1b
it
VO
LUM
E7b
it
47
VC
OA
lignm
ent
AF
T10
AF
T
Vcc 100K 100K
0.1u
VC
OF
ilter
+
0.47uAud
io.o
ut
+Aud
io in
10u
Vid
eo
Out
FM
Filt
er+
1u
FM
Out
0.01u
+
to B
US
Lin
e
+
-7-
IC Block Diagrams
ThermalProtection
-
+AMP
PumpUp
1
INV
ER
TIN
G
INP
UT
2
Vcc
3
PU
MP
UP
OU
T
4
GN
D
5
Ver
. OU
TP
UT
6
OU
TP
UT
S
TAG
E V
cc
7
NO
N IN
V.IN
PU
T
IC001 < Audio AMP.> TA8200AH
4
5
3
1
2
6 9
7
10
12
118
+Ripple Filter
AMP.1
IN 1 +
+
+
+
++
IN 1
Pre-GND
400Ω
400Ω 20KΩ
20KΩ
+AMP.2IN 2 IN 2+
Vcc
Vcc
OUT 1
PW-GND
OUT 2
+
+
RL
RL
1
IN 32
Vcc
3
SW14
OUT
5
GND
6
IN1-Y7
IN1-C
8
SW2
9
IN 2
SW
6dB
(-6dB)
CLAMP
CLAMPCLAMP
BIA
S
6dB
SW
15K
SW1 SW2 OUTLH-
L IN 1LH
IN 2IN 3
IC1401 < VIDEO Switch > MM1188XS
IC501 < Vertical Output > LA78040N
IC Block Diagrams
-8-
VDD VDD VDD
VDD
MIRROR 2
VDD
FLASH-DIODE
1xVOC
InvertingInput
(3x)
1,2,3
9,8,7
3x
VDD
6
5
4
Non-invertingInput
Vip
MIRROR 1
Vbias
MIRROR 3
LEVEL-SHIFTER 1
LEVEL-SHIFTER 2
DIFFERENTIALSTAGE
CURRENTSOURCES
GND
THERMALPROTECTION
Note: One amplifier shown.
CathodeOutput
(3x)
Vi
IC701 < Triple Video Output Amplifier. > TDA6103Q
IC3701 < Audio Control & Surround > NJW1138MP
10 7
1
69 8
20
22
54
NJRCORIGINAL
SURROUND &
SIMULATED SURROUND
IIC BUSINTERFACE
AGC
BIAS
TONEVOL 1
TONE
27
VOL 1
VOL 2
VOL 2
19
18
17
14
13
16
15
21
30
23242526
12
11
IN 1a
AGC SS-FIL OUT 1a IN 2aTONE
Ha TONELa
OUT 2a
CVA
CVB
CTH
CTL
AUX0
AUX1
SCL
SDA
V+
GND
VREFOUT 2bSR-FIL OUT 1b IN 2b TONEHb
TONELb
IN 1b
Service Information
-9-
This TV set has a built-in power supply protection circuit.It is provided to protect the TV set in case of a power supply circuit malfunctions. When something abnormality occursduring TV reception, the TV set goes to the stand-by mode.
When an abnormality occurs during TV reception, it causes pin 27 of the CPU to go continually Low (less than0.75V) for about one second. The CPU detects that this has occurred and outputs the signal from pin 31 to switchoff the power supply lines.
Releasing the protective circuit and restoring power supply
To release the protective circuit and restore power supply, turn the power to the TV set OFF and then ON again viaeither the main power switch or the ON-OFF button on the remote control. This will work only if the power supplytrouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot be restored and thecircuit will have to be repaired.
Protection Circuit
L
R
AUDIO
AV1 INPUT
VIDEO
(MONO)
S-VIDEO
MONITOROUT
ANT. 75Ω
Mechanical DisassembliesCABINET BACK REMOVAL1. Refer to Figure 1, remove 8 screws.2. Pull off cabinet back and remove.
Figure 1. Cabinet Back Removal
CHASSIS REMOVAL1. Remove cabinet back.2. Discharge the picture tube anode (2nd anode lead) to the dag
4. Remove chassis completely by sliding it straight back.
PICTURE TUBE REMOVALCAUTION: Do not disturb the deflection yoke or magnet
assembly on the picture tube neck. Care must be takento keep these assemblies intact, unless picture tube isbeing replaced . Discharge the picture tube to the coat-ing before handling the tube.
1. Remove chassis, referring to Chassis Removal instructions.2. Place cabinet’s front face down on the soft surface.3. Remove the screw on each corner of the picture tube and
GENTLY lift the picture tube out of the cabinet.4. Install a replacement picture tube in reverse order.
Properly install the degaussing coil and picture tube grounding lead on the picture tube. See Figure 2.
Note: If the Picture Tube is being replaced, mount theDegaussing Coil on the picture tube. See Figure 2.
DEGAUSSINGCOIL DEGAUSSING
COIL HOLDER
DEGAUSSINGCOIL SOCKET
To CRT unit ground
PICTURE TUBEGROUND LEAD
Figure 2.Picture Tube Removal
[1] Initializing Procedure1. Put a new memory IC.2. Turn on the TV set.3. Press and hold the TV/AV Selector on the TV set for more than 2 seconds. The following picture appears on the
screen.
4. Press the PROGRAMME UP on the TV set while the above On-Screen Display is still on the screen. The followingpicture appears on the screen.
This completes the initialization of memory IC.
Following shows the initialized contents of memory data by this procedure.- Plug & play : No executed- Inhibit data : Cancelled- Ch skip data : Cancelled- Sound volume data : 10/63 steps.- Volume Lock : OFF- Tuning Lock : OFF- Colour system : AUTO
1
CLR
- + PMENUTV/AV
-10-
Service Adjustments with Replacing Memory IC (IC802)
Note: The CPU (IC801) and memory IC (IC802) store the service adjustments data and controls data for each circuit. When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain the best performance. The necessary service adjustments are carried out by using the RC handset.Please set up the TV set with following steps [1] to [2].
Press and hold for more than 2 seconds
- + PMENUTV/AV
-11-
Service Adjustments with Replacing Memory IC(IC802)[2] Required Service AdjustmentsReadjust the following service adjustments.Adjustments Service Mode No. & ItemRF AGC Item 01, RF AGCHorizontal centre Item 02, H-PHAVertical size Item 04, V-SIZVertical-S correction Item 05, V-SCOVertical linearity Item 06, V-LINGray scale Item 14-17, 19-21
Further adjustment please refer to page 14 and 15.
Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments.Service mode adjustments table in CPU ROM
21 DRV White Balance Adj.22 B-YD 00~15 9 B-Y DC level Adj.. Colour compensation (PAL)23 R-YD 00~15 9 R-Y DC level Adj.. Colour compensation (PAL)24 B-YDN -16~+15 0 NTSC B-Y DC level Adj. (Difference value from PAL.)
25 R-YDN -16~+15 0 NTSC R-Y DC level Adj. (Difference value from PAL.)26 SBDC -16~+15 - 8 SECAM B-Y DC level Adj. (Difference value from PAL.)27 SRDC -16~+15 - 5 SECAM R-Y DC level Adj. (Difference value from PAL.)28 G-YA 0,1 0 G-Y angle Adj. (Colour Phase G-Y Demodulation 0=240 degree, 1=253 degree)29 RBGB 00~15 8 R-Y, B-Y Gain Blance Adj. (Do not change.)30 RBAG 00~15 8 R-Y, B-Y Angle Adj. (Do not change.) 31 G-YAN 0,1 0 NTSC G-Y Angle Adj. (Difference value from PAL.)32 RBGBN -16~+15 0 NTSC R-Y, B-Y Gain Balance Adj. (Difference value from PAL.)33 RBAGN -16~+15 0 NTSC G-Y, B-Y Angle Adj. (Difference value from PAL) 34 COGV 00~03 0 Coring Adj. (Base colour)35 BLKS 00~03 3 Black stretch effective point selection, 0=OFF, 1-3=FREE36 BLKG 00~03 3 Setting of Black stretch gain. 0=OFF, 1-3=FREE37 BRTA 0,1 0 On and off of ABL. 0=ON, 1=OFF38 BRST 0,1 0 ABL Effect Limit SW. 0=With Limitter, 1=Without Limitter
39 BRTH 00~07 0 ABL Threshold Pint.
(Do not change)
4041424344
White peak limitter. 0=OFF, 1-3=With LimitterWPL 00~03 2Y Gamma setting. 0=OFF, 3=Max (Do not change)YGAM 00~03 0Switching of Pre-shoot and Over shoot in AV mode. 0=Pre, 1=OverPORW 0,1 0Pre-shoot/Over shoot Adj. in AV mode.PORS 00~03 2
CDMRF 00~07 0 RF V-Countdown Circuit Adj. 50/60Hz Jage, Sync. Trigger 0=AUTO, 1=Ext. Trigger 69AFCAV 0,1 0 AV AFC Gain & Gate Adj. (AV for item 67)70VSUAV 0,1 0 AV V-Sync. Separation Adj. (AV for item 68)71CDMAV 00~07 0 AV V-Countdown Circuit Adj. (AV for item 69)72HLVDRF 0,1 1 Incorrect operation prevention at the time of a special signal (RF mode), 0=Fix, 1=Variable73HLVDAV 0,1 1 Incorrecr operation prevention at the time of a special signal (AV mode), 0=Fix, 1=Variable74VCO-SW 0,1 0 4.43Mhz Coring Adj. 0=for +, 1=for Minu75
AVNCON 00~127 64 Contrast Adj. of the blue back in AV mode. 78AVNBRI 00~127 64 Brightness Adj. of the blue back in AV mode.
0,1 1 SIF Trap Switch. 0=OFF, 1=ON00~255 136
79POMT 00~127 25 Picture Mute at the time of power ON.80CHMT 00~31 10 Picture Mute at the time of channel change.81SYST 00~15 5 Selection of the number of times of a Colour system judgment.82S-STE 0,1 1 AV Stereo/Mono Option. 0=Mono, 1=AV Stereo83VOLTBL 0~1 0 Volume Curve Table. 0=B-Curve, 1=C-Curve84MPP
BASS
0,10,1
1 Multi P-P Option. 0=Without Multi P-P 1=With Multi P-P
A-AGC 0~2
CPU Debug Date.
371 R71 0~255 0 CPU Debug Date.372 R72 0~255 0 CPU Debug Date.
304 R04 0~255CPU Debug Date.303 R03 0~255
CPU Debug Date.
SUB-BT 0~20 AGC Setting of AUDIO IC. 0=OFF, 1=ON(540mV), 2=ON(300mV)
Notes: The initial value that the CPU writes down the CPU ROM data to the memory when replaced the memory IC.TV set may not operate correctly with this initial value. It is required to set up the fine adjustment for service adjustments described in the above.
0
-13-
Service Adjustments with Replacing Memory IC(IC802)
TIMER
P
P
ADDRESSDRV
SI. 00100101S2.11111000DATA
B 6421 R 64ADDRESS
V-SCO
SI. 00100101S2.11111000DATA
905
ADDRESSRF AGC
SI. 00100101S2.11111000DATA
3001
[Entering to Service Mode]
1. Press and hold the MENU button on the Remote Control and press the VOLUME (+) button on the TV set.Following setting items appears on the screen.
Display for [V-SCO] V-S Correction adjustment
Read Status
Item No. Item Data value
Display for [RF AGC] RF AGC adjustment
Read Status
Item No. Item Data value
Data value for Red
Display for [DRV] White balance adjustment
Read Status
Item No. Item
Data value for Blue
To return to normal TV mode, press the MENU button on the TV set or the remote control handset.
2. Select item by pressing the TIMER (Item No. UP) or SOUND MUTE (Item No. DOWN) button on the remote controlhandset.
3. Adjust data value by pressing the VOLUME + or VOLUME - button on the remote control handset.
Example
MENU
MENU
0102030405......90... ...9089888786......01
- + PMENUTV/AV
-14-
Service Mode Adjustments
Vertical size
Following adjustments should be carried out when the memory IC is replaced. How to enter the service mode andadjust values, please refer to “ Entering to Service mode” on page 13.
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 to minimum.
(2) Select [RF AGC] in the service mode.(3) Change value until the snow noise just disappears.(4) Exit from service mode.
Item 01 [RF AGC] AGC
(1) Receive a monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [H-PHA] in the service mode.(4) Change value to be optimum horizontal centre position.(5) Exit from service mode.
Item 02 [H-PHA] HORIZONTAL CENTRE
Horizontal centre
(1) Receive a monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Select [V-SIZ] in the service mode.(4) Change value to be optimum vertical size.(5) Exit from service mode.
Item 04 [V-SIZ] VERTICAL SIZE
(1) Receive a crosshatch pattern.(2) Set the lever of SW501 (Vertical Center SW) as the
position of a center.(3) Select a picture mode of NATURAL by pressing the
PICTURE MODE button.(4) Select [V-SCO] in the service mode.(5) Adjust Vertical S-letter Correction so that the difference
of “c”, “d” and “e” becomes less than 2 mm by pressingthe VOLUME + or - button.
(6) Confirm Vertical Linearity and adjust Vertical Center then Vertical Size.
(7) Exit from service mode.
Item 05 [V-SCO] V-S CORRECTION
c Upper
Center
Bottom
d
e
(1) Receive a crosshatch pattern.(2) Set the lever of SW501 (Vertical Center SW) as the
position of a center.(3) Select a picture mode of NATURAL by pressing the
PICTURE MODE button.(4) Select [V-LIN] in the service mode.(5) Adjust Vertical Linearity so that the difference of “a” and
“b” becomes less than 3mm by pressing VOLUME + or- button.
(6) Exit from service mode.
Item 06 [V-LIN] VERTICAL LINEARITY
a
b
Upper
Center
Bottom
-15-
1
C515
R487KQ
T471-H5
T471-H1
KDY-1
JP409
JP407
JP403
JP405
C527
C514
R488
J410
R477A
C486
R492
C491
D485
R475
R485
D4
R484
C420C420-H3
D438 KDY
R441
JP411
R477
JP408
JP404
T471-H2
J216
C471
JW24
R483
R481R481A
T471-H7T471-H11
T471-H6T471-H4
T471-H8
T471-H10
T471FBT.
T471A
JP483
L442
R442
FC3A CHASSIS
(1) Receive the monochrome circular pattern.(2) Set the brightness and colour to normal, contrast to maximum.(3) Enter to the service mode.(4) Set each value of Item-14 RBIAS, 15 GBIAS, 16 BBIAS, 17 RDRIV and 19 BDRIV mode to 64.(5) Select Item-20 mode to be one horizontal scanning line and turn the screen volume on the FBT to obtain just visible
one coloured line.(6) Press the 1 (Red Bias -), 2 (Red Bias +), 5 (Green Bias -), 6 (Green Bias +), 9 (Blue Bias -) or 0 (Blue Bias +)
button to adjust the brightness of each colour until a dim white line produced. Please see the control button alloca-tions in this mode.
(7) Select Item-21 DRV mode to enter the white balance adjusting mode.(8) Press the 3 (Red Drive -), 4 (Red Drive +), -/-- (Blue Drive -) or RECALL (Blue Drive +) button alternately to
produce normal black and white picture.(9) Exit from the service mode.(10) Check for proper grey scale tracking at all brightness levels.
NOTE: If the grey scale adjustment is made after picture tube replacement, check the high voltage.
Items 14-17, 19-21 GREY SCALE
Service Mode Adjustments
MAIN BOARD
SCREEN VR(Under side)
0
7
1 4
85
2 3
6
9
P
P
JXMYA
-/--
P P
TV/AV
A B
CH SCAN
TIMER
MENU PIC MODE
SWAP
BASS SURROUND
Red Bias -
Red Bias +
Green Bias -
Blue Bias +
Red Drive +
Blue Drive -
Blue Drive +Green Bias +
Blue Bias -
Red Drive -
Press the MENUbutton to exitfrom servicemode.
JP463
Q461Q461A
Q461-H2
C524
C521
C515
C437
C487JP412
IC50
IC501-H2
T471-H
T471-H1
KDY-6KDY-3KDY-1
R355
R540
C540J503
JW1
R473
D46
R467
D462 C467
R469
D466
R464
C470
C527
R525
R516
C468
C464
R465
R462
D469
R488
D485
C423-H2 C423-H3
C423
C423-H1C420-H1
C420C420-H3
C420-H2
C437A
R422
R424
D438
C441-H2
C441-H3
C
R435
R423
KDY
C441-H1
R441
D461
R466
R461 C463
JP410
JP411
T471-H2
T471-H4 T471FBT.
L442-H1L442-H2
L442
L441-H2
L441-H1
L441-H3L441
D441
R442
JP436
C423A
J540
R514
1
JW15
4
R518
5
R487KQ
IC501-H3
01-H2IC501-H1
T471-H5
JP409
JP407
JP403
JP405
D512
J501
J502
R512
C518
C527
R519
C520
R515
R522
C510
C517
R516
C514
R511R510
J028
J029
D476
R488
J410
R477A
C486
R492
C491
D485
R475
R485
R474
C449
D468
D467
D448
C469
D486
R486
R484
R477
JP408
JP404
J216
C471
JW24
R483
R481R481A
T471-H7T471-H11
T471-H6
T471-H8
T471-H10
T471A
IC501
IC501A
JP483
J504
FC3A CHASSIS
VERT.OUT
E
E
E
E
9
10
9
10
E
JW17
JW16
C425AC424A
Q613-H4
C651-H1C651-H2
C655
D651
T611-H16
C465
R672
D671
R671
J607Q
J605
VR651
R662
R661
D661
R663
R664
J611
R657
Q681
R655
R652
665
J604
J413
R434
C432
T43
C434
R431 Q431
R433
C425C424L432
D439
T43
L652
L651
C651
D652
C652
R644
R643 R631
R628
R624
R623R622
Q612
Q611 L615
D617
D616
C644
C613
L616L613
C615
D611
C618A
C617
C616L611
L612
R629
T611CONVERTER TRANS.
T611-H8
T611-H7
T611-H6
T611-H5
T611-H3
T611-H17
T611-H13
T611-H12
T611-H11
C629
J82
J82
J82
Q613-H2
OUT
Q613A
R445
L462-H3
L462
L462-H2
Q652
J612
C618
+BTP-B
!
-16-
Service Adjustments
(1) Connect a DC meter to TP-B (L631) and the ground.(2) Tune the receiver to an active channel and synchro-
nized picture. Select NATURAL picture mode by press-ing the PICTURE MODE button on the remote control.
(3) Adjust B-voltage to become 130 ± 1V DC by usingVR651.
B-VOLTAGE SUPPLY CHECKING
Note: +B (+130V) Voltage Check and Grayscale Adjustmentmust be completed before attempting High Voltage Check.
(1) Connect high voltage voltmeter negative lead to ground, and connect + lead to anode of picture tube.
(2) Tune receiver to an active channel and confirm TV is operating properly.
(3) Maximize the beam current by adjusting the contrast and brightness controls to maximum. Confirm high volt age is within 24 KV and 26 KV at maximum beam current.
(4) Eliminate the beam current by adjusting the contrast and brightness controls to minimum. Confirm high voltage does not exceed 26.5 KV at zero beam current.
If reading is not within range, check horizontal circuit.
No high-voltage adjustment is provided on this chassis.
HIGH VOLTAGE CHECK
(1) Receive a 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 centre.
FOCUS ADJUSTMENT
TP-B
Focus VR (Upper size)
MAIN BOARD
(1) Receive a monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Adjust the vertical centre of the picture with SW501.
VERTICAL CENTRE
Vertical centre
SW501
VR651
(1) Receive a monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) If the picture is too wide, or narrow, cut or short “JP436”
on the main unit. When “JP436” is shorted, the horizon-tal width increase. When “JP436” is cut, the horizontalwidth decrease.
Important note:When “JP436” is cut, in order to prevent a spark, leave theopening between cutting portions 5mm or more.
HORIZ. WIDTH ADJUSTMENT
JP436
1
E
E
JW15
C524
C521
R518
C515
R487KQ
J024
J515
J516
IC501-H3
IC501-H2IC501-H1
-H1
KDY-6KDY-3KDY-1
L1501
J018
D1032
JP409
JP407
JP405
J1504
J409
J1205
J1206
J1204
J1207
J1208
Q540R540
J1501
D512
J501
J502
R512
C518
C527
R519
C520
R515
R522
SW501
R501
C510
C517
D501
R525
R516
C514
R511R510
J028
J029
D476
R488
J410
R477A
C486
R492
C491
D485
R475
R485
R474
C449
D468
D467
D448
C469
D486
R486
R484
JP408
JP404
C471
JW24
R483
R481R481A
T471-H10
1.
1230
J120330
J021D1402
D1401
C1082
Q1402J025
IC1401VIDEO SW
J026
J209
C1401
JP1502
K1004
IC501
IC501A
JP483
J504
JP501JW
31
FC3A CHASSIS
JW36
VERT.OUT
(SOLDER
SIDE)
IC1501VIDEO
SW
V-CENTER
more than 5mmJP436
-17-
Special Function
Once TUNING LOCK is switched on, further channel tuning(Pre-set) is not possible. The Channel Swapping function alsois not possible.
(2) Tuning Lock setting
The following special functions can be set up on this TVset.
With this function, a maximum sound volume limit can be set atany level.
(3) Music Mode setting
When Music Mode is ON, Programme position from “91” to “99”and “0” are set Music Mode. Only sound is provided and anypicture is not on the screen under Music Mode.
Set AV-START to ON and every time the TV set is switched on,AV position will be the initial programme position.
(4) AV Start setting
TUNING LOCKED
AV
MUSICTurns blackscreen
SOUND BASS ON 18
(1) Volume Lock setting
(5) Language selection for the on screen display
Either Thai or English can be selected as the language of thescreen display.
1To enter into the special function setting mode, press and hold the MENU button of the remote control, then press thePROGRAMME DOWN button on the TV set.
2 Select an item of the special functions by pressing the PROGRAMME UP or DOWN button on the remote control or the TV set.
3 Set the selected special function “ ON “ by pressing the VOLUME + or - button. To cancel, set to “ OFF”.
How to set the special function:
Note: When making the VOLUME LOCK setting, set thedesired maximum sound volume by pressing the VOLUME + or- button before entering Special Function setting mode.
4 Press the MENU button of the remote control to return to the normal TV mode.
P
P
P
P
MENU
OFFOFFOFFOFF
TUNING LOCK
AV START
VOLUME LOCK
MUSIC MODE
SELECT ADJUST M EXIT
OFFONOFFOFF
TUNING LOCK
AV START
VOLUME LOCK
MUSIC MODE
SELECT ADJUST M EXIT
LANG / ENGLISH
To select language:1) Select LANG/ by pressing the PRGRAMME UP or
DOWN button.2) Select either Thai or English by pressing the VOLUME + or
- button.
LANG / ENGLISH
TUNING LOCK
AV START
VOLUME LOCK
MUSIC MODE
OFFOFFOFFOFF
SELECT ADJUST M EXIT
LANG / ENGLISH
MENU
- + P
-18-
Purity and Convergence Adjustment
RED
BLUE
Adjust tabs together tosuperimpose red andblue horizontal line.
Figure- 2 BLUE AND RED LINE MOVEMENT Figure- 3 BLUE/RED AND GREEN MOVEMENT
Adjust tabs together tosuperimpose red/blueand green horizontalline.
Adjust tabs angle to superimposeblue and red vertical line.
Adjust tabs angle to superimposered/blue and green vertical line.
GREEN
BLUE / RED
CAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustmentshould be made 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-convergence magnetsassembly 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 remove the3 Rubber Wedges, and slide the Deflection Yoke fully forward.
4. Rotate and spread the Tabs of the two Purity Magnets to cen-tre the vertical green belt in the picture screen. The PurityMagnets are also adjusted to obtain vertical centring of theraster.
5. Slowly 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 position forwardor backward slightly.
8. Tighten the mounting screw of the Deflection Yoke. AdjustConvergence next.
CENTRE 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 1 and 2, andsuperimpose the Red and Blue vertical lines in the centre areaof the picture screen. Refer to figure 2.
3. Keeping the mutual angle of the Tabs of the Four Pole Magnetturn them together to superimpose the Blue and Red horizon-tal lines in the centre area of the picture screen. Refer to fig-ure 2.
4. Turn Green gun on and adjust Six Pole Magnet 3 and 4 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. Adjust theDeflection Yoke to converge the detail in the outer area (left sideand right side) of the picture screen by orbital movement of thefront of the Yoke, then secure the Deflection Yoke in appropriateposition by putting the wedges as illustrated. Tighten screw hold-ing the Deflection Yoke.
RUBBERWEDGE
DEFLECTION YOKE
DEFLECTION YOKEMOUNTING SCREW
Figure 4. Deflection Yoke Movement
SIX-POLEMAGNET TABS FOUR-POLE
MAGNET TABS
ANGLEOF TABS
PURITYMAGNETTABS
432
1
FOCUS GAP(G3-G4)
Figure 1. Purity and Convergence Magnets
MAGNET TABS
ANGLE OF MAGNET TABS
Figure 5. Adjusting Magnet
Note: The form of deflection yoke changes with models.
-19-
Cabinet Parts List C2GW
Note: Parts order must contain Service Ref. No., Part No., and descriptions.
0
7
1 4
85
2 3
6
9
P
P
JXMYA
-/--
P P
TV/AV
A B
CH SCAN
TIMER
MENU PIC MODE
SWAP
BASS SURROUND
11
12
Key No. Part No. Description
9
- + PMENUTV/AV
4-a 53 2
1 610 286 4977 ASSY,BUTTON POWER-C2GA610 286 7770 SPRING COIL-C2GA
Ref. No. Part No. Description Ref. No. Part No. Description
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: Parts order must contain Service Ref. No., Part 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 Resistor as follows:
CAPACITORCERAMIC 100P K 50V
Rated Voltage
Tolerance Symbols:Less than 10pFA : Not specified B : ±0.1pF C : ±0.25pFD : ±0.5pF F : ±1PF G : ±2pFR : ±0.25-0pF S : ±0-0.25pF E : +0-1pFMore than 10pFA : Not specified B : ±0.1% C : ±0.25%D : ±0.5% F : ±1% G : ±2%H : ±3% J : ±5% K : ±10%L : ±15% M : ±20% N : ±30%P : +100-0% Q : +30-10% T : +50-10%U : +75-10% V : +20-10% W : +100-10%X : +40-20% Y : +150-10% Z : +80-20%
Material:CARBON........... CarbonMT-FILM............ Metal FilmOXIDE-MT......... Oxide Metal FilmSOLID................ CompositionMT-GLAZE......... Metal GlazeWIRE WOUND...Wire WoundCERAMIC RES.. CeramicFUSIBLE RES....Fusible