SERVICE MANUAL Colour Television - + P MENU TV/AV Specifications Power Source . . . . . . . . . AC220-240V, 50/60Hz. Colour System . . . . . . . . PAL (AV input : PAL/NTSC4.43/NTSC/PAL-60Hz) Television System . . . . . . B/G Channel Coverage . . . . .Australian Channels VHF: 0-11, 5A UHF: 28-69 CATV: S1-S41, X, Y, Z, Z+1, Z+2 New Zealand Channels VHF: 1-11 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 ✕ 3 (1.0Vp-p, impedance 75Ω) S-Video input ✕ 1 (Din 4 pin, Separate Y/C Signals Input) Audio inputs:Phono jack (R/L) ✕ 3 (436mVrms, impedance more than 40KΩ) Video monitor outputs: Phono jack ✕ 1 (1.0Vp-p, 75Ω) Audio monitor outputs: Phono jack(R/L) ✕ 1 (436mVrms, Impedance less than 600Ω) Headphone jack: Mini stereo jack ✕ 1 Speakers ......... 6cm ✕ 12cm ✕ 2 Sound Output (Music) . . . 7.5W + 7.5W Dimensions . . . . . . . . . . 750(W) ✕ 583(H) ✕ 503(D)mm Weight . . . . . . . . . . . . . . approx. 46.8 Kg Specifications subject to change without notice Product Code: 1 113 516 18 Chassis Series: FA1 C2SY FILE NO. Model No. CP29AF2 Service Ref. No. CP29AF2-00 (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 JXMLF MENU -/-- P P A•B CH SCAN TIMER TV/AV P ▲ P ▼ SWAP VSM BBE BASS ASM SURROUND REFERENCE NO. SM5110330 Original Version
32
Embed
SERVICE MANUAL Colour Television Model No. CP29AF2cncms.com.au/SANYO-SMs/Consumer-Electronics/CRT... · ident filter colour apc af amp af amp 4.5/6.0 sif io adj bus i/f fm det limitter
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.
Give complete “SERVICE REF. NO.” for partsorder or servicing. It is shown on the rating plateat the cabinet back of the unit.
This T.V. receiver will not work properly inforeign 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 .
CO
MP.
V
IDE
O
A10
1T
UN
ER
IIC B
usS
OU
ND
CA
RR
IER
TR
AP
(5
.5M
Hz)
IC30
2V
IDE
O S
W
Y
IC10
01A
V S
EL
EC
TOR
V L R
MONITER OUT AV1 INPUT
V L R
S-I
N
V L R
AV3 INPUT
IC30
1C
OM
B F
ILT
ER
CY
CLKIIC
Bus
IIC B
us
IF
OU
T
Y/C
OM
P.
IC20
01
TE
LE
TE
XT
UN
IT
C-I
N IC80
1C
PU
IC80
2M
EM
OR
YIIC
Bus
IIC B
us
OS
D(R
/G/B
)
IIC B
us
4.43
MH
z
3.58
MH
z
VID
EO
OU
TR
/G/B
V-O
UT
H-O
UT
L-O
UT
R-O
UT
IC21
1
H.V
.
Q43
1H
-DR
IVE
IC50
1V
ER
T. D
EF.
CR
T U
NIT
IC00
1A
UD
IO A
MP.
IC35
01Q
-SO
UN
DIC
3401
BB
E
SP
901
SP
902
CR
T
V L R
AV2 INPUT(FRONT)
SU
B U
NIT
MA
IN U
NIT
AV
UN
IT
2 5710
23 1
13 11
L-O
UT
R-O
UT
17 8718
L-O
UT
R-O
UT
X16
1AS
AW
-FIL
TE
R6/
7
HE
AD
PH
ON
E
JAC
K
52
SU
B U
NIT
TV
CO
MP.
41
3 5
Y C
7 2 413 14 168
10
34
3
CO
MP.
V
IDE
O
2325
2931
37 39
1
C-O
UT
34
736
CO
MP.
V
IDE
O
4042T
V-L
IN
TV
-R IN
3233L-
OU
T
R-O
UT
RL
18/
9101
38 23/2
8/30
OS
D(R
/G/B
)
40/4
1/42
32 40
3 17
19
CLK
18/1
9/20
VID
EO
D
ET.
IC20
1IF
/VID
EO
/CH
RO
MA
3
23
CO
MP.
V
IDE
O
Y-O
UT
21 12
R B
G
42
Q43
2H
-OU
T
DY
VE
RT.
DY
T47
1F
BT
FO
CU
S
SC
RE
EN
HO
RIZ
. DY
PIN
CU
SH
ION
CIR
CU
IT(Q
461,
Q46
2)
8/9
32/3
4
31/3
35/
6
19/
20
From
IC80
1(C
PU
)
pin
-32/
34
10/1
4
48A
UD
IO D
IRE
CT
OU
T(M
ON
O)
14 132627
IC19
20A
UD
IOC
ON
TR
OL
20/2
1
FR
OM
IC
801(
CP
U)
PIN
-32/
34
IIC B
US
3S
IF
FIL
TE
R
(5.5
MH
z)
SIF
IN
OS
D(R
/G/B
)
YV
ELO
CIT
YC
IRC
UIT
SV
M C
oil
From
IC
302
pin-
7
TO V
eloc
ity C
ircui
t
140V
L-O
UT
R-O
UT
Chassis Block Diagrams (MAIN SIGNAL PROCESSING CIRCUIT)
-3-
N
ot e
quip
ped
-4-
26 28
7
CO
LOU
R S
YS
TE
M O
PT
ION
KE
Y S
WIT
CH
INK
EY
SW
ITC
H
TV
/AV
SW
ITC
H O
UT
(T
V=
LOW
, AV
1/A
V2/
AV
3=H
IGH
)
SC
L (T
o B
US
IC)
34 32 15 29
SD
A (
To
BU
S IC
)
PO
WE
R O
N/O
FF
PH
OT
O
CO
UP
LE (
ON
=H
IGH
, OF
F=
LOW
)
IC80
1C
PU
QX
XA
VB
681
39 42 41 40 1 2 2431
33201962311
AD
JUS
TM
EN
T D
AT
A IN
OS
D B
LK O
UT
OS
D R
ED
OU
TO
SD
GR
EE
N O
UT
OS
D B
LUE
OU
T
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
C8M
Hz
CP
U O
SC
OU
T
CP
U O
SC
INLE
DO
N-T
IME
R L
ED
OU
T (
ON
=LO
W)
RC
SIG
NA
L IN
(AC
TIV
E=
LOW
)R
C P
RE
-AM
P.
10938
IC00
1A
UD
IO A
MP
.
VIF
-M O
UT
NT
SC
3.58
=H
IGH
, OT
HE
R=
LOW
SIF
4.5
MH
z
SIF
6.5
MH
z
SIF
5.5
MH
z
M (
4.5M
Hz)
=H
IGH
N
ot u
sed
D/K
(6.
5MH
z)=
HIG
H
Not
use
d
B/G
(5.
5MH
z)=
HIG
H
Not
use
d
17S
OU
ND
MU
TE
OU
T (
MU
TE
ON
=H
IGH
)
IC30
1Q
TC
9090
AN
MC
OM
B F
ILT
ER
VID
EO
SW
AF
T IN
30
IC20
1Q
XX
AV
B48
8MV
IDE
O /
CH
RO
MA
IC10
01Q
MM
1313
BD
AV
SE
LE
CT
OR
A10
1T
UN
ER
IC19
20U
PC
1857
AC
TA
UD
IO C
ON
TR
OL
IC34
01B
BE
5
BB
E C
ON
TR
OL
(OF
F=
HIG
H, M
ID=
Mid
., H
IGH
=LO
W))
IC30
2V
IDE
O S
W12
Y/C
, CO
MP
. SW
(Y
/C=
LOW
, CO
MP
.=H
IGH
)
IC35
01Q
-SO
UN
D13
3D S
UR
RO
UN
D O
N/O
FF
(O
N=
HIG
H)
143D
ST
ER
EO
ON
/OF
F (
ON
=H
IGH
)
3 4 2 10 6
56
20 21 19 20
SCL
SDA
8 9 14 10S
CLS
DA
IC20
01S
TV
5348
TE
LE
TE
XT
17 16
Chassis Block Diagrams (SYSTEM CONTROL)
N
ot e
quip
ped
QX
XA
VB
680
IC Block Diagrams
-5-
IC201 < IF/Video/Chroma> QXXAVB488
VIF INIF AGC OUT AFT
TV IN
EXT IN
AUDIOOUT
33
29
35
26
37
40
32
13
44
43
11
15
16
12
2725242122412819201830239101445
QX
XA
VB
241
SYNC IN
KILLER FILTER
IDENT FILTER
COLOUR APC
AF A
MP
AF A
MP
4.5/
6.0
SIF
IO A
DJ
BUS
I/F
FM DET
LIM
ITTE
R
B EX
ITIN
PUT
R E
XIT
INPU
T
G E
XIT
INPU
T
V SY
NC
TRIG
SYN
CSE
P.
SYST
EMID
EQ ELIM
INAT
E
BGP
GEN
E.PH
ASE
CO
NT
KILL
ERD
ET
LOC
KD
ET
ID DET
CH
RO
MA
APC
DET
PAL
SW
SEC
AMFF SE
LFAD
J
V.R
AMP
AFC
AFC
1H D
LVC
XO
ACC
DET
F/F
2ND
AM
P
CH
RO
MA
BPF
1ST
AMP
(AC
C)
HPF
AFT
AFT
OU
TVI
DEO M
UTE
H S
TOP
H.P
HAS
E
AUD
IO M
UTE
SW
SDA
SCL
FAST
BLK
B IN
R IN B-
OU
T
R- O
UT
G-O
UT
G-IN
H-V
CC
SEC
AM R
EF
V.SI
ZESE
RVI
CE
SW
H-OSC
SELF
AD
J.
CLA
MP
50/6
0 O
UT
R
TIN
T
BRDR
IVE B
G
ABC
LAB
CL
ID C
UT
BLU
EBAC
KW
HIT
E BA
CK C
OLO
RC
ON
TRAS
T
SER
VIC
EBR
IGH
T
STAT
ION
DET
STAT
ION
SYST
EM S
ET
SYST
EM
IF A
GC
DEL
AY A
DJ
DEF
EAT
DL
TIM
E
DL
FIN
E
VIDEOVCC
VIDEOGND
DEFLECTIONGND
TRAP
SWD
.TR
AP
F.TR
AP
BLAC
K ST
REC
H O
FF
F AG
C
VID
EOD
ETVI
FAM
P
APC
DET
ADJ
DET
BLAC
KST
REC
H
VID
EOTO
NE
CH
RO
MA
TRAP
VID
EOM
UTE
CLA
MP
SHAR
PNES
S
CO
NTR
AST
DEL
AY
FEF
FILT
ER
AGC
R-Y IN
B-Y IN
H OUTPUTSY
STEM
DEC
OD
E
BRIG
HT
CH
RO
MA
DEM
OD
ULA
TOR
DR
/VE
AMP
AFC
GAI
N
RG
B M
ATR
IXC
ON
TRAS
T
32 F
HVC
O
MU
TED
ET
HV
BLK
VER
TIC
ALC
OU
NTD
OW
N
HO
RIZ
ON
TAL
CO
UN
TDO
WN
EXIT AUDIOIN
GND
VCC
VIFSIF
SIF IN
47
48
46
1
8
3
42
52
51
50
49
5
4 6 7 2 9 31 38
36
34
39
V-O
UT
V-FB
V R
AMP
BLK
AUDIODIRECTOUT
AF DCFB
HI VCC
IF OUT
IF APC
IF VCO
IF VCO
BLACKPEAK
ACL/CLK Y-SWOUT
X TAL 4.43
X TAL 3.58
BLACK PEAK
QX
XA
VB
488
-6-
IC Block Diagrams
IC501 < Vertical Output > LA7841
THERMALPROTECTION
PUMPUP
AMP
-
+
GN
D
Ver
. Out
put
Out
put
Sta
ge V
cc
Non
Inv.
Inpu
t
Inve
rtin
gIn
put V
cc
Pum
p U
pO
utpu
t
LA7841
1 2 3 4 5 6 7
IC001 < Sound Output > LA4270
VIDEO ADCLINEMEMORY
CLAMP
BPF
BPF
BPF
VERTICAL ENHANCER
SECAM
4.43 NTSC
DYNAMICCOMB FILTER
PLL
BPF
BPF
PEDESTALCLIP
CORING
CHROMA KILLER
+ +Y DAC
C DAC
Y-OUT
C-OUT
25
231 LINE DOTIMPROVEMENET
I2C BUS19
3
8/9
BUS
CLOCK
+
-
4fsc
fsc4fsc TC9090ANM
CH1
CH2
ThermalShutdownOverVoltage
RippleFilter
30K
300
30K
300
Vcc
-
+
+
-
Fee
dbac
k 1
Inpu
t 1
Rip
ple
filte
r
Inpu
t sid
eea
rth In
put 2
Fee
dbac
k 2
Out
put 2
Out
put s
ide
eart
h
Pow
er s
uppl
y
Out
put 1
LA4270
IC301 <COMB Filter> TC9090ANM
IC1920 <Audio Control> UPC1857ACT
LPF
LPF
26
MFO
29 30 28 24 23 22 21 20 15 19 18 10 9 17
14
13 27
25
1678121116
L
L+R
OU
TPU
TSE
LEC
TOR
I2C BUSINTERFACE
OFFSET
VOLUMEBALANCECONTROL
MUTE
OFFSET
+
+
+
+
+
+
+
SCLSDAADSDGNDMF1
PS1 PS2 PS3 PS4
PHASETRANSFER
EFFECTCONTROL
2 3 4 5
LF1
TONECONTROL
TONECONTROL
1/2Vcc
OFL1 OFL2 LBC LTC VOL-C
Lout
Rout
++
+
+
Vcc
++
+
L+φ
-R-φ
R
FC1 FC2 FC3 FC4 LF2 AGND OFR1 OFR2 RBC RTC BAL-C
1/2Vcc
+
-
-
-
+
+
+
Lin
Rin
Mix
φ
UPC1857ACT
-7-
IC Block Diagrams
1GND
2
3
4
DETRCTL
DEFR
5
6
CTL
VCAR
R-MIX
7R-OUT
VCA
8R-IN
9APFR
10HPFRHPF
LPF
11LPFR
12BIASC
LD –
++
HI MID
++
++
CTL
24 DETL
23
22 DEFL
VCA21 VCC
20 VCAL
19 L-MIX
18
17
16
L-OUT
L-IN
15
14
13
APFL
HPFL
LPFL
HPF
LPF
+
+ +
+
MIDLO+
+ –
HI
IC3401 <BBE> QBA3880AFS
8 7
BUFFER
6 5
4 321
Vin1 CTL Vin2 NC
Bia
s
NCVVoutGND +
IC211, IC302 QNJM2233BD
-8-
IC Block Diagrams
IC1001 < AV Selector > MM1313BD
41
1
7
13
27
MTV-V
V1-V
V2-V
V3-V
STV-V
3
9
5
11
42
0dB 0dB
V1-Y
V2-Y
V1-C
V2-C
MTV-L
2
8
14
25
V1-L
V2-L
V3-L
STV-L
40
4
10
16
MTV-R
V1-R
V2-R
V3-R
26
36
19
20
STV-R
BIAS
SCL
SDA
BIAS
30GND
I2C LOGIC 28
21
12
6
24 ROUT2ROUT2
S1
S2
ADDRESS
Mute
-6dB
6dB
6dB
32 ROUT1
33
22
LOUT1
LOUT2
-6dB
31
37
29
39 COUT1
CIN1
YOUT1
VOUT223
YIN1
34 VOUT16dB
38Vcc
6dB
-6dB
COMB
IC3501 < 3D Surround Processor > MM1369
SIMULATEDSTEREO
SIMULATEDSTEREO
VIRTUAL AUDIO
QXPANDER PROCESSOR
gm
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
Vcc Lin Gl1 Gl2 Gl3 Gl4 Fc Qf1 Qf2 Qf3 Qf4 Lout
Rin Gr1 Gr2 Gr3 Gr4 M/g Ref SPC Qi S/Q Rout Gnd
MM1369AD
-9-
IC802
ME
MO
RY
IC291
SO
LDE
R
SID
E
VID
EO
SW
T611CONVERTER
TRANS.
Q613POWER. OUT
Q612POWER.
DRIVE
TELETEXT BOARD
SECAM BOARD
Service Adjustments MAIN BOARD
Pincushion Adjustment B-Voltage Supply Adjustment
(1) Receive PAL cross hatch pattern.(2) Select ”DYNAMIC” picture mode with the remote
control VSM (Video Status Memory) button.(3) Adjust the focus control VR(H) for the best focus
vertical line on the screen center.(4) Adjust the focus control VR(V) for the best focus
horizontal line on the top of the screen.(5) Readjust the focus of the items (3) and (4).
FOCUS ADJUSTMENT
FBT
SCREEN VR
FOCUS VR (H)FOCUS VR (V)
(1) Connect DC meter to C641(+ side) and the ground.(2) Tune the receiver to an active channel and
synchronized picture. Select DYNAMIC picture mode bypressing the VSM (Video Status Memory) button onthe remote control .
(3) Adjust B-voltage to be 140 ± 0.5 volt DC by using VR631.
B-VOLTAGE SUPPLY ADJUSTMENT
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Connect a high voltage probe to anode lead of the
picture tube.(4) The high voltage must be 30.5KV ± 1KV and less than
33KV at 0 beam current (Brightness and contrast mini-mum settings).
NOTE:If the picture tube is replaced, check the high voltage.
HIGH VOLTAGE CHECK
(1) Receive the cross hatch pattern signal.(2) Adjust so that the vertical lines to become straight by
using VR463.
PINCUSHION ADJUSTMENT
[1] Initializing Procedure1. Put a new memory IC.2. Turn on the TV set.3. Press and hold the TV/AV Selector button on the TV set for more than 2 seconds. The following picture appears on
the screen.
4. Press the MENU button 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- Music Mode : OFF- AV Start : OFF- Language : English- AV status : When the memory IC replaced, the CPU writes the initial value of the AV Status
to the replaced memory IC as shown in below table.
-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 thebest performance. The necessary service adjustments are carried out by using the RC handset. Please setup the TV set with following steps [1] to [2].
Red Drive AdjustmentRD 64 00-127Blue Drive AdjustmentBD 64 00-127Drive AdjustmentDRV - -Screen Adjustment1 LINE - -Y/C SeparationY/C 11 10,11
AV mode contrast under the no signal conditionVCON 10 00-63
VBRI 20 00-63DVD Colour AdjustmentDCOL 115 00-255DVD Tint OffsetDTIN 05 -32 - +32DVD PAL Colour differential valueDPLC 18 -127 - +127DVD PAL Tint differential valueDPLT 15 -63 - +63Manufacturing process flag for DVD DVD-F 00 00-01
1-HDL through flagHDL-F 00 00-01MAT switching flagMAT-F 00 00-01NICAM/A2 carrier settingNICAM 00 00-01DVD 1 chip colour adjustmentCOFF 00 00-03BBE MID level adjustmentBBE-M 128 00-255BBE HIGH level adjustmentBBE-H 00 00-255Y/C IC emphasis settingENH 00 00-01Option settingCPU Debug Data
CPU Debug DataCheck Code
OPTR00
R71R72
255FF
FFFF
00-25500-FFh
00-FFh00-FFh
AV mode brightness under the no signal condition
-12-
Service Adjustments with Replacing Memory IC(IC802)[Entering to Service Mode]
1. Press and hold the MENU button on the TV set and press the [1] button on the remote control handset. Followingsetting items appears on the screen.
Display for [AGC] AGC adjustment
00010100 ADDRESS DATA05 AGC 64
Read Status
Item No. Item Data value
0102030405......172 172171170169168......01
Display for [H-P] Horizontal centre adjustment
00010100 ADDRESS DATA01 H-P 8
Read Status
Item No. Item Data value
Data value for Red
Display for [DRV] White balance adjustment
00010100 ADDRESS DATA23 DRV R 64 B 64
Read Status
Item No. Item
Data value for Blue
To return to normal TV mode, press the MENU button on the TV set or 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
- + PMENUTV/AV
0
7
1 4
85
2 3
6
9 /
TIMER TV/AV
TIMER
MENU
P
P
ZOOM
-13-
IC201
IF/V
IDE
O/C
HR
OM
A
IC3801
IF S
IGN
AL
PR
OC
ES
SO
R
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [H-P] in the service mode.(4) Change value to be optimum horizontal centre position.(5) Exit from the service mode.
Item 01 [H-P] HORIZONTAL CENTRE
Service Mode Adjustments
Horizontal centre
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 12.
RO
MA
A101
TU
NE
R MAIN BOARD
IC201 pin-2
Q106
Pin-2
IC201pin-46
MAIN BOARD
TP-A
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Select [V-P] in the service mode.(4) Change value to be optimum vertical centre position.(5) Exit from the service mode.
Item 02 [V-P] VERTICAL CENTRE
Vertical centre
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Select [V-S] in the service mode.(4) Change value to be optimum vertical size.(5) Exit from the service mode.
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [OSD] in the service mode.(4) Change value to be proper OSD position.(5) Exit from the service mode.
Item 04 [OSD] OSD POSITION
Item 03 [V-S] VERTICAL SIZE
Vertical size
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 mini-mum.
(2) Select [AGC] in the service mode.(3) Change value until the snow noise just disappears.
Item 05 [AGC] AGC
Item 06 [VCO] AFT
(1) Input the SG signal to collector of Q106.SG signal frequency : 38.0MHzSG signal level : 70 dB~75dBSG signal : COLOUR bar
(2) Connect a short clip between the base of Q106 andground. Connect a short clip between TP-A and TP-E.
(3) Connect oscilloscope to pin 2 of IC201.(4) Select [VCO] in the service mode.(5) Change value until the voltage to be 4.5 ± 1.0V.(6) Exit from the service mode.
Item 07 [SIF] SIF
(1) Tune the receiver to the clearest station with SystemB/G(5.5MHz) in your area.
(2) Connect DC voltmeter to pin 46 of IC201 and ground.(3) Select [SIF] in the service mode.(4) Change value until the voltage to be about 3.0V.(5) Exit from the service mode.
TP-E
(1) Receive the monochrome circular pattern.(2) Set the brightness and colour to normal, contrast to
maximum.(3) Enter to the service mode.(4) Select No. 18 RBI (Red Bias), No, 19 GBI (Green Bias),
and No. 20 BBI (Blue Bias) and set each data to 0 with+ or - key.
(5) Select No. 21 RD (Red Drive) and No. 22 BD (BlueDrive) and set each data to 64 with + or - key.
(6) Turn Screen Control (T471) to minimum (fully counter-clock-wise).
(7) Select the TV Service Menu No. 24 (ScreenAdjustments).
(8) Advance Screen Control (T471) clockwise to obtain justvisible one color line. If line does not appear, place thiscontrol to maximum (fully clockwise).
(9) Raise each Bias Level with 1, 2, 5, 6, 9 and 0 keys toobtain just visible white line.
(10) Select the TV Service Menu No. 23 DRV (DriveAdjustments).
(11) Adjust Red and Blue Drive Levels alternately with 3, 4, -/-- or RECALL key to produce normal black and white picture in highlight areas.
(12) Check for proper grayscale at all brightness levels.To turn off the TV Service Menu display, press theMENU key.
Note: If Grayscale Adjustment is made after picture tubereplacement, check High Voltage
Items 18 - 24 GREY SCALE
-14-
Service Mode Adjustments
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 abnormalityoccurs during TV reception, the TV set goes to the stand-by mode.
When an abnormality occurs during TV reception, it causes pin 24 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 15 toswitch off 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 againvia either the main power switch or the ON-OFF button on the remote control. This will work only if the powersupply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot berestored and the circuit will have to be repaired.
Protection Circuit
Red Bias -
Red Bias +
Green Bias -
Green Bias +
Blue Bias -
Blue Bias +
Press theMENUbutton to exitfrom service mode
Red Drive -
Red Drive +
Blue Drive -
Blue Drive +0
7
1 4
85
2 3
6
9
JXMLF
MENU
-/--
P P
A•B
CH SCAN
TIMER TV/AV
P
P
SWAPVSM
BBE BASS
ASM SURROUND
-15-
Signals: Use a pattern generator which can output red, green, blue and white raster and crosshatch pattern signals.
Procedure: Carry out purity adjustment first, and then carryout convergence adjustment.
Preparation: The deflection yoke may have several correction magnets attached to its outer edge. If replacing the picture tube, the positions of the magnets can be changed andthey can be re-used, so remove these magnets and keep them safely so that they do not get lost.
PURITY ADJUSTMENTS1. Place the picture so that its front faces west.2. Insert the power plug into a wall outlet, and then turn on
the power for the TV and de-magnetize the TV using itsown degaussing circuit.
3. Loosen the screw which is holding the deflection yoke(with integrated purity magnets), and them move thedeflection yoke forward as far as it will go. Remove therubber wedge at this time.
4. Turn off the red and blue raster so that only the greenraster is on.
5. Adjust the angle between the tabs (wings) on puritymagnets to center the vertical green belt in the picturetube screen. (See Figures 2 and 3.)
NOTE: This adjustment can only be carried out by changing the angle, not by rotating the tabs up anddown.
6. Gently move the deflection yoke back to the positionwhere the green band fills the whole of the picture tubescreen, and then tighten the screw to secure the deflection yoke in place.
7. If there is any color distortion around the edges, correctit by attaching magnets to the outer edge of the deflection yoke. The magnets should be attached sothat the line running from the position of the distortion tothe center of the picture tube intersects the deflectionyoke. The colors on the magnets indicate the north andsouth poles of the magnets. Attach the magnets inwhichever direction causes the distortion to disappear.(See Figures 1 and 4. The south and northpole positions are shown as a guide.)
8. Switch the screen to red and blue rasters and check thatthere is no color distortion. If there is any distortion,adjust the angles of purity magnets tabs or the forward-back position of the deflection yoke, or change the attachment positions of the correction magnets.
Purity and Convergence AdjustmentCAUTION: 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:
GREEN band
Magnet attachment position
Deflection Yoke outer edge
Color distortion
Figure 1
Figure 2
Figure 3
Figure 4
Change the angle to adjustthe green band so that it iscentered in the screen.
-16-
Purity and Convergence Adjustment
CONVERGENCE ADJUSTMENTPreparation: After carrying out purity adjustment and
before proceeding to convergence adjustment, provisionally insert the rubber wedge so that there is no vertical or sideways play in the deflection yoke.
Signals: Display a crosshatch pattern.
1. Red/blue center adjustmentAdjust the angle between the tabs (1) and (2) in Figure5 and rotate them together until the lines of the red andblue crosshatch patterns (vertical and horizontal lines)are superimposed in the center of the screen.
2. Green and red/blue center adjustmentAdjust the angle between the tabs (3) and (4) in Figure5 and rotate them together until the lines of the greencrosshatch pattern are superimposed with the red/bluecrosshatch pattern (vertical and horizontal lines) whichwere superimposed in step 1).
3. Vertical lines at screen center (Red and Blue)Use the YH control (see Figure 8) at the top of thedeflection yoke to correct the vertical line convergenceat the center of the screen.(See Figure 9.)
4. Vertical lines at screen top and bottomUse the YHC control (see Figure 8) at the top of thedeflection yoke to correct the vertical line convergenceat the top and bottom of the screen. (See Figure 10.)
5. Horizontal lines at screen top and bottomRotate the Deflection yoke to the left or right to correctthe horizontal line convergence at the top and bottom ofthe screen. (See Figure 11.)If vertical lines are intersecting at the top and bottom,use a screwdriver to adjust the balance coil at the top ofthe deflection yoke. (See Figure 12.)
Red
Blue
Figure 6
Red/Blue
Green
Figure 7
Red Blue
Figure 9
YH YHC
Balance Coil
YHcYHFigure 8
Figure 5
Adjust the angle rotation of tabs(1) and (2) to align the verticaland horizontal lines.
Adjust the angle and rotation oftabs (3) and (4) to align the verticaland horizontal lines.
Use the YH control to correct.
RedBlu
e
Figure 10
Use the YHc control to correct.
BlueRed
Figure 11
Rotate the DY to correct.
BlueRed
Figure 12
Use the Balance coil to correct
-17-
Mechanical DisassembliesCABINET BACK REMOVAL1. Refer to Figure 1, remove 12 screws.2. Pull off cabinet back and remove.
CHASSIS REMOVAL1. Remove cabinet back.2. Discharge the picture tube anode (2nd anode lead) to the dag
Deflection yoke connector (KDY), Speaker connectors (KL and KR), and 2nd anode lead.
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.
Figure 2. Picture Tube Removal
Figure 1. Cabinet Back Removal
ANT. 75Ω
INPUT
L
R
AUDIO
S-VIDEO
AV1 AV3
VIDEO
MONITOROUT
L-MONO
ANT. 75Ω
INPUT
L
R
AUDIO
S-VIDEO
AV1 AV3
VIDEO
MONITOROUT
L-MONO
Cabinet Parts List
-18-
C2SY
Note: Parts order must contain Service Ref. No., Part No., and descriptions.
1 610 284 7628 ASSY,BUTTON POWER 610 229 8406 SPRING
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