SERVICE MANUAL Colour Television Specifications Power Source . . . . . . . . AC220-240V, 50/60Hz. Colour System . . . . . . . PAL, SECAM, NTSC4.43, NTSC Television System . . . . . B/G Channel Coverage . . . .VHF: 0-11, 5A (Australia), 1-11 (New Zealand) UHF: 28-69 (Australia), 21-69 (New Zealand) CATV: S1-S41, X, Y, Z, Z+1, Z+2 Aerial Input Impedance 75Ω Ext. Terminals AV1 (Rear): CENELEC Standard Input (Composite video, RGB and audio-L/R) Output (TV-output with composite video and audio-L/R) AV2 (Rear): Phone jac k ( Video input and Audio-L/R input) S-Video Input (Din 4 pin, Separated Y/C signals input) AV3 (Front): Phone jac k ( Video input and Audio-L/R input) Monitor Output: Phone jac k (Video monitor output and Audio-L/R monitor output) Headphone Jack: Mini Stereo Jack Speaker . . . . . . . . . . 5 cm ✕ 12 cm ✕ 2 pcs. Sound Output . . . . . 5W + 5W Dimensions . . . . . . . . . . 774 (W) ✕ 491 (H) ✕ 508 (D)mm Weight . . . . . . . . . . . . . . . approx. 36.9 Kg Specifications subject to change without notice Original Version Chassis Series: FAW-1 F8WA FILE NO. Model No. CP28WF2 Service Ref. No. CP28WF2-00 (Australia/New Zealand) 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. Product Code:111371200 REFERENCE NO. SM5110615 TV/AV MENU CH
34
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TV/AV MENU CH - cncms.com.aucncms.com.au/SANYO-SMs/Consumer-Electronics/CRT-Television/cp2… · it is completely safe to operate without danger of electrical shock. ... VIF IN VIF
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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 .
Q61
1
IC34
51N
ICA
M/S
TE
RE
O D
EC
OD
ER
78 55565758616875767980
71
53
39
4733232221202726
141312
IC80
1C
PU
1
4
33,3
4
53
54
112120198
17 16 1518
45
IC20
1IF
/VID
EO
/C
HR
OM
A/
DE
F.
BLK
R IN
G IN
B IN
33,3
447
,48
36,3
7
31,3
24
51,5
212
5
60,6
1
IC00
1A
UD
IO A
MP.
8,10
1,5
3
AU
DIO
L &
R
HE
AP
HO
NE
JA
CK
& S
WIT
CH
SP
EA
KE
RS
P90
1S
P90
2
A10
1F
/S T
UN
ER
AE
RIA
L
SC
LS
DA
RF
AG
C
19 151,32,6
20 11 7
K1001 AV1 SCART
VID
EO
OU
T
VID
EO
OU
T (
TV
)
CR
T
FO
CU
S/S
CR
EE
N
R BG
Y IN
C IN
K10
04 A
V2
S-V
IDE
O
V L R
K1101AV3 IN (FRONT)
V L R
K1003 MONITOR OUT
V L R
K1002 AV2 IN
VIF
IN
VIF
INS
AW
FIL
TE
R(V
IF)
X13
2
SIF
IN
SIF
INS
AW
FIL
TE
R(S
IF)
X13
1
IC12
01V
IDE
O S
W
8
9
64
1
AV
1 V
IDE
O IN
AV
1
VID
EO
/Y S
WIC
1050
AV
1 A
UD
IO IN
AV
2 A
UD
IO IN
AV
1 A
UD
IO IN
AV
2 A
UD
IO IN
AV
1 A
UD
IO O
UT
AV
2 V
IDE
O IN
1A
V2
(VID
EO
or Y
IN)
7
3
AV
3 (V
IDE
O IN
)
AV
3 A
UD
IO IN
R IN
G IN
B IN
R IN
G IN
B IN
C IN
VID
EO
/Y O
UT
VID
EO
/Y IN
VID
EO
MO
NIT
OR
O
UT
AU
DIO
MO
NIT
OR
OU
T
AU
DIO
MO
NIT
OR
OU
T(L
& R
)
(Fro
m p
in-4
7 &
48
of IC
3451
)
VID
EO
MO
NIT
OR
OU
T
R O
UT
G O
UT
B O
UT
SC
L
SD
ASIF
OU
T
SC
LS
DA
16M
UT
E
RC
R
EC
EIV
ER
A19
01
KE
Y S
W
ME
MO
RY
IC80
3S
CL
SD
A
IIC B
US
C
ON
TR
OL
SW
691
T61
1C
ON
VE
RT
ER
TR
AN
S.
L902
DY
15
85 32
AC
PLU
G
D60
3-D
606
C60
7
Q61
3
5VQ
666
Q66
1
PR
OT
EC
T
IC64
35V
-1
IC64
29V
IC64
15V
D64
6
D64
1
D64
7
27V
18 11 14 101213
D63
7
27V
Q65
1
150V
Q64
2Q
641 Reg
.
-27V
Q64
3
Q68
6
Q68
2
D61
5
PH
OTO
CO
UP
LER
Q64
5
Q68
5
PO
WE
R
EW
-OU
T
V-O
UT
H-OUT
T45
1F
BT
HV
200V
Q43
2H
-OU
T
Q43
1IC
501
VE
RT.
DE
F.
36
H-B
LAN
K
Q46
2D
441
Q46
1
L461
L462
SCREEN WIDTH CONTROL
CR
TH
EAT
ER
-3-
Chassis Block Diagrams
IC201 < IF/Video/Chroma/Def.> TB1262F
-4-
IC Block Diagrams
Cync. out
H.AFC H,V
Syn
c.A
FC
1/H
AF
C g
ain
V fr
eqw
ide
blan
king
DC Resistor
BLACK DET
YS(YCbCr)
Cb2/B IN
Cbr2/R IN
Y2/CVBS2/G IN
Cb3 IN
Cb3 IN
Y3/CVBS3 IN
Cr OUT
Cb OUT
Y/MON OUT
Y/CVBS1 IN
C IN
IF DET OUT
DAC 1
DAC 3
DAC 2
Loop
Filt
er
VIF
VC
O F
SIF
OU
T
HV
cc (
9V)
SIF
IN
IF GND
DC
NF
SIF IN
N.C.
VIF IN
VIF IN
S-Filter
APC Filter
X' tal
CW OUT
R OUT
G OUT
B OUT
VM OUT
EXT. R IN
EXT. G IN
EXT. B IN
Y sm
ABCL IN
SDA
SCL
Bed pin
45 35 50 41 40 39 37 33 28 47 46 11 25 17
42
23
20
31
27
26
32
4746778169371737065
68
58
61
53
52
51
55
57
56
59
54
62
43
66
36
19
44
49
48
12
13
14
18
21
22
79
80
9
7
6
34
72
75
76
77
Dig
. VD
D
Dig
. GN
D
RG
B V
cc (
9V)
YC
Vcc
(5V
)
V R
AM
P
V O
UT
EH
T IN
EW
OU
T
FB
T IN
H O
UT
VD
HD
SC
P O
UT
YC
GN
D
H D
RIV
EA
FC
2P
alaG
Baw
IIC B
us
IF
-EW
-C
oner
(T/B
)S
ize
Trap
eze
Par
abol
aV/E
W-E
W-
Siz
eV
Cen
tre
V L
inea
rV
-S
SIF IN
FM
Filt
er
IF V
cc(9
V)
RF
AG
C
IF A
GC
IF V
cc(5
V)
SA
WS
AW
-1 s
t S
IF-
QS
S d
emp
AM
dem
oVIF
/SIF
-VIF
-V
CO
S-T
rap
AF
T (
to B
us)
neg/
pos
SIF
BP
FF
M(A
M)
RG
B--
>Y
UV
Y1
Pro
c.C
-Tra
pY
Del
ay
Ch
rom
aPA
L/N
TS
C/
SE
CA
M
YU
V S
wit
ch
UV
Pro
c.B
BT
INT
Col
our
Con
tras
t
Y2
Pro
c.B
lack
str
etch
DC
res
isto
rW
PL/
A.C
./W
PS
RG
B P
roc.
YU
V->
RG
B/S
WC
ut o
ff/D
rive
Y/C
YCbCr2
YCbCr3
IC Block Diagrams
-5-
IC001 < Audio AMP.> TA8200AH
1
2
3MUTE
REFERENCES
NON INVERTING INPUT (1)
INVERTING INPUT (1)
SUR/MUTING
TURN ON AND OFF
9
5
10
84
6
Vcc
NON INVERTING INPUT (2)
INVERTING INPUT (2)
L
R
-
+
-
+
GND
RF I 27K
RF I 27K
SCPROTECTION
Tj
THPROTECTION
OUTPUT-L
OUTPUT-R
TDA7263M
IC501 < Vertical Output > LA7846N
THERMALPROTECTION
PUMPUP
AMP
-
+
N.C
.
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
LA7846N
1 3 4 5 6 7 8 9 10
GN
D
2
N.C
.
N.C
.
-6-
IC Block DiagramsIC3451 < Digital TV Sound Processor > TDA9875A
I2C-BUSINTERFACE
ADDR1ADDR2
P1P2
920
SCLSDA
31345
IDENTIFICATION
CLOCKXTALI
XTALOSYSCLK
181721
PEAKDETECTION
SDI1SDI2
SDO1SDO2
SCKWS
272625242223
I2C-BUSAUDIO
INTERFACE
VDDD1VDDD2VSSD1VSSD2
CRESET
1564144916
DIGITALSUPPLY
TEST1TEST2
2830 TEST
TDA9875
MOL MOR AUXOL AUXOR
61 60 58 57
SUPPLYOPERATIONALAMPLIFIERS
DAC(2) DAC(2)
AUDIO PROCESSING
DAC(2)
ADC(2)
DIGITALSELECT
LEVELADJUST
LEVELADJUST
DEMATRIX NICAMDECODER
FM (AM)DEMODULATION
NICAMDEMODULATION
INPUT SWITCHAGC, ADC
SIF2 SIF1
10 12
SUPPLYSOUND IF
(SIF)
VDDA1VSSA1Vref1Iref
TIMINGDETECTION DAC
19
21
Vtune
NICAMPCLK
SCIR1SCIL1SCIR2SCIL2EXTIREXTILMONOIN
33343637313229
SCOR1SCOL1SCOR2SCOL2LORLOL
474851526362
ANALOGCROSSBAR
SWITCH
CAPL2CAPL1
CAPR1CAPR2
4241
4544
PCAPRPCAPL
VDDA2VSSA2VSSGVref2
Vref(P)
Vref(n)
5455
384335463940
SUPPLYDAC
VDDA3VSSA3
Vref3
VSSA4
SUPPLY DAC
REFERENCE
5956
53
50
76
118
(first general purpose I/O pin)
(second general purpose I/O pin)(first I2C-bus slave address modifier)
(ground guards)(reference voltage)(positive reference voltage)(reference voltage ground)
(analog supply voltage)
(supply ground 3)
(reference voltage)
(supply ground 4)
(Lou
dspe
aker
(M
ain)
ou
tput
rig
ht c
hann
el)
(Lou
dspe
aker
(M
ain)
ou
tput
left
chan
nel)
(Hea
dpho
ne (
Aux
iliar
y)
outp
ut r
ight
cha
nnel
)
(Hea
dpho
ne (
Aux
iliar
y)
outp
ut le
ft ch
anne
l)
(sou
nd IF
in
put 2
)
(sou
nd IF
in
put 1
)
-7-
CPU Port Functions
Pin No. Function Name Function IN/OUT
1 RC IN RC signal input IN
2 RESET Reset input IN
3 50/60 50/60Hz output (50Hz=H) OUT
4 H-BLK H-Blank OUT
5 V-BLK V-Blank OUT
6 AV SW2 Option SW2 OUT
7 AV SW1 Option SW1 OUT
8 KEY IN Key switch signal input IN
9 H-P Headphone mute (not used) OUT
10 RELAY To operate degauss circuit OUT
11 PROTECT Power failure detect IN
12 HP-mode Headphone mute OUT
13 BBE BBE ON/OFF OUT
14 W-P White enable OUT
15 B-OUT Blue output OUT
16 G-OUT Green output OUT
17 R-OUT Red output OUT
18 FB-OUT Fast blanking output OUT
19 SDA SDA IN/OUT
20 SCL SCL OUT
21 VDD VDD --
22 JDTO Not used --
23 N.C. Not used --
24 Vpp Not used --
25 AVDD3 Analog VDD of PLL --
26 TEST0 Test pin --
27 MCFM Test pin --
28 JTCK Test pin --
29 TXCF Analog pin for the --Teletext slicerline PLL
30 CVBSO Not used --
31 AVDD2 Analog power supplies --
32 JTMS Not used --
33 CVBS2 Video input (H.F) IN
34 CVBS1 Video input (L.F) IN
35 AGND Analog circuit ground --
36 GND Digital circuit ground --
37 JTRSTO Test pin --
38 PXFM Analog pin for the Display --Pixel Frequency Multiplier
39 AVDD Analog power supplies --
40 H-SYNC Horizontal Sync input IN
41 V-SYNC Vertical Sync input IN
42 ACK Answer for status OUT
43 STATUS Request for Bus open IN
44 IGNOA RGB on/off switch OUT
45 AMP-MUTE Sound mute on/off switch OUT
46 L/L’ L/L’ switch OUT
Pin No. Function Name Function IN/OUT
47 LED2 Brightness control of LED OUT
48 S-VIDEO SW S-video switch OUT
49 H-Phase H-Phase (not used) OUT
50 OSC OUT Oscillator (output) OUT
51 OSC IN Oscillator (input) IN
52 RF AGC RF Auto gain control IN
53 PITTARI PITTARI switch OUT
54 POWER TV power on/off switch OUT
55 8PIN (SC2) AV input detect IN
56 8PIN (SC1) AV input detect IN
Option Setting
-8-
After replacing the Memory IC (IC803)The memory IC (IC803), stores the option data of TV set and service adjustments data for each circuit, therefore, whenthe memory IC is replaced, it should be programmed to the following settings and “ SERVICE ADJUSTMENT” onpages 9 to 12.
1) To enter to the Option ModePress and hold the F/OK button on the remote control and Programme down button (CH) on the front panel of the TV. The option window will appear on the screen.
2) To set the Option ModeSelect the desired option item by pressing the Programme down or up button.To switch the option mode, use the Level up or down button.The data which is set in the option mode is stored into the memory IC automatically.
The following table shows the available option items and default setting mode.
Option Mode Mode Description & NoteON-TIMER ON or OFF On-timer available, default “ON”SORT MODE Sorting or Tuning Tuning mode, default “TUNING”P & P ON or OFF Plug & Play mode, default “ON”WEL. TEXT ON or OFF Display message when first set up, default “ON”Comb Filter OFF or ON For factory use, default “OFF”WSS-Aust ON or OFF Default “ON”Auto Volume ON or OFF Auto volume, default “OFF”3D Surround ON or OFF Default “ON”Country UK or IRE or B/G, D/K, I, L/L’ TV system, default “ B/G, D/K, I, L/L ”Wide ON or OFF Wide mode, default “ON”AV3 ON or OFF Front AV disable, default “ON”CS/A,B CS or A/B Default “CS”
3) Exit from the Service ModePress the Programme information call button or turn off the TV set by using the mains switch.
Service Adjustments
-9-
After replacing the Memory IC (IC803)The memory IC (IC803), stores the service adjustment data for each circuit, therefore, when the memory IC isreplaced, it should be programmed by using “OPTION SETTING” on previous page and the following adjustment.
Note: Some items of the service adjustments for this chassis are controlled by the CPU (IC801), and the adjustments are carried out by using the RC handset.
Image
Item No. OSD Description01 P V-C P Vertical Position Adjustment02 P H-P P Horizontal Position Adjustment03 P V-L P Vertical Linearity Adjustment04 P VSC P Vertical S-Correction Adjustment05 P V-A P Vertical Size Adjustment06 P H-S P Horizontal Size Adjustment07 P E-P P Pin Cushion Adjustment08 P E-T P Trapezoid Distortion Adjustment11 P ECT P Top Corner Correction Adjustment12 P ECB P Bottom Corner Correction Adjustment13 P HPA P Parallelogram Distortion Adjustment
Important Notice:Do not attempt to adjust service adjustments not listed on above otherwise it may cause loss of performance andproduct safety.
Service Adjustments
-10-
1) To enter to the Service ModePress and hold the GREEN button on the remote control and then press the Programme down button (CH) on the front panel of the TV.Press the Programme down button to select the mode required (Regular, Image, others and TB12**). Then press the F/OK button to select the mode.
The available adjustment items are as follows;Image :This can be adjusted for picture image/Shapes.Regular :This can be adjusted for the service adjustment.Other :This is for the factory setting. DO NOT ADJUST.TB1251 :This is for the factory setting. DO NOT ADJUST.
2) To select the mode and service item and change data valueSelect the desired adjustment mode by pressing the Programme down or up button and press the F/OK button.To select the adjustment item, use the Programme down or up button.To change the service data, use the Level up or down button.The data which is set in the service mode is stored into the memory IC automatically.
Regular01 AGC 38
Image01 P V-P 24
REGULAR mode IMAGE mode
3) Exit from the Service ModePress the Programme information call button or turn off the TV set by using the mains switch.
Initialisation of Memory IC (IC803)To initialise the memory IC (IC803), press and hold the Picture mode selection (→•←) button on the remote control, then press the Programme down button on the front panel of the TV set and then turn the Mains switch off and on. The initialisation is now completed.When initialised the memory IC and all of the setting data (option data and service adjustment data) stored in the ICare reset to the default value. It is necessary to set the option settings and readjust the service adjustments listed on page 9 and to re-tune all the channels.
Adjustment DataAdjustment No.and Item name
Adjustment DataAdjustment No.and Item name
Adjustments
-11-
IMPORTANT NOTICEDo not attempt to adjust the following service adjustments except when adjustments are required in servicing other-wise it may cause loss of performance and product safety.
+B VOLTAGE ADJUSTMENT
(1) Connect a DC voltmetre to TP-B and the ground.(2) Tune the receiver to an active channel and synchronized pic-
ture. Select NATURAL picture mode by pressing the Picturemode selection button on the remote control .
(3) Adjust voltage to 150± 0.5V DC by using VR641.
AGC ADJUSTMENT
NOTE: Do not attempt this adjustment with weak signal.(1) connect digital voltmetre to TP-A and GND.(2) Tune the receiver to most clearest (or strongest) VHF station
in your area. Set the brightness and contrast controls to max-imum. Set the colour control to minimum.
(3) Enter to the service mode and select mode “Regular”, andselect item No. 01 “Regular 01 AGC”
(4) Press the Level up (+) or Level down (-) button to adjustvoltage to be 3.2± 0.2V DC.
FOCUS ADJUSTMENT
(1) Receive a monochrome circular pattern.(2) Set the brightness to normal and contrast to maximum.(3) By using FOCUS VR on the F.B.T., adjust focus control for
well defined canning lines.
SCREEN ADJUSTMENT(1) Receive black & white pattern.(2) Set the brightness and colour to normal, contrast to maxi-
mum.(3) Enter to the service mode and select mode “Regular”, then
select item No. 02 “Regular 02 CUT”. The horizontal line willappear on the screen.
(4) Using the numeric buttons shown set each colour to minimumby decreasing to the point where any further decrease resetsthe adjustment to maximum value.
BIAS ADJUSTMENT(5) By using the buttons 1, 2, 3, 4, 5, 7, 8 on the remote control,
adjust the line to be white.
The key allocation is as follows;Button No. Operation
“Regular 04 GRY” (B-Drive) and adjust both initially to 40.(7) Change data value of each item by using Level up(+) or Level
down(-) button to obtain the proper white balance.
PCC ADJUSTMENT
PCC ADJUSTMENT(1) Receive cross hatch pattern and set screen mode to “FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No. 07 “Image 07 P E-P”.(3) Press the Level up (+) or Level down (-) button to adjust the
vertical line to be straight.
TRAPEZOID ADJUSTMENT(1) Receive cross hatch pattern and set screen mode to
“FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No. 08 “Image 08 P E-T”.(3) Press the Level up (+) or Level down (-) button to correct
the trapezium distortion of the vertical line.
CORNER ADJUSTMENT(1) Receive cross hatch pattern and set screen mode to
“FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No.11 “Image 11 P ECT” for top corner adjustmentor item No. 12 . “Image 12 P ECB” for bottom corner adjust-ment.
(3) Press the Level up (+) or Level down (-) button to correctthe distortion of the vertical line around the corners..
Adjustments
-12-
HORIZONTAL ADJUSTMENT
HIGH-VOLTAGE CONFIRMATION
VERTICAL ADJUSTMENT
HORIZONTAL CENTRING ADJUSTMENT(1) Receive circular pattern and set screen mode to “FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No. 02 “Image 02 P H-P”.(3) Press the Level up (+) or Level down (-) button to adjust the
horizontal centre.
VERTICAL CENTRING ADJUSTMENT(1) Receive circular pattern and set screen mode to “FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No. 01 “Image 01 P V-C”.(3) Press the Level up (+) or Level down (-) button to adjust the
vertical centre.
Horizontal centre
HORIZONTAL WIDTH ADJUSTMENT(1) Receive circular pattern and set screen mode to “FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No. 06 “Image 06 P H-S”.(3) Press the Level up (+) or Level down (-) button to adjust the
horizontal width.
Note: +B (+150V) Voltage Check and Grayscale Adjustment mustbe completed before attempting High Voltage Check.
(1) Connect high-voltage meter to the anode of CRT and theground.
(2) Receive circular pattern and set screen mode to “FULL”.(3) Set controls for brightness and contrast to maximum.(4) Confirm high voltage is within 28.5 KV and 30.5 KV at maxi
mum beam current.
VERTICAL HEIGHT ADJUSTMENT(1) Receive circular pattern and set screen mode to “FULL”.(2) Enter to the service mode and select mode “Image”, and
select item No. 05 “Image 05 P V-A”.(3) Press the Level up (+) or Level down (-) button to adjust the
vertical height.
OSA POSITIONING ADJUSTMENT
(1) Receive circular pattern and set screen mode to “FULL”.(2) Enter to the service mode and select mode “Regular”, and
select item No. 08 “Regular 08 OSD”. The OSD test bar willappear on the top of screen.
(3) Press the Level up (+) or Level down (-) button to adjustproper OSD positioning.
-13-
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 centre 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 colour 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 centre of the picture tube intersects the deflectionyoke.The colours 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 raster and check thatthere is no colour 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:
Deflection yokemounting scrrew
Rubber wedge
Correction magnet
Move the deflection yoke back and forth to adjust the purity
GREEN band
Magnet attachment position
Deflection Yoke outer edge
Color distortion
Figure 1
Figure 2
Figure 3
Figure 4
N
S
12 3 4
SIX-POLEMAGNET TABS
FOUR-POLEMAGNET TABS
ANGLEOF TABS
PURITYMAGNETTABS
Change the angle to adjust the green band so that it iscentred in the screen.
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Purity and Convergence AdjustmentCONVERGENCE 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 centre 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 centre of the screen.
2. Green and red/blue centre 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 centre (Red and Blue)Use the VR2 control (see Figure 8) at the top of thedeflection yoke to correct the vertical line convergenceat the centre of the screen.(See Figure 9.)
4. Vertical lines at screen top and bottomUse the VR1 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
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 VR2 control to correct.
RedBlu
e
Figure 10
Use the VR1 control to correct.
BlueRed
Figure 11
Rotate the DY to correct.
BlueRed
Figure 12
Use the Balance coil to correct
12 3 4
SIX-POLEMAGNET TABS
FOUR-POLEMAGNET TABS
ANGLEOF TABS
PURITYMAGNETTABS
Balancecoil
VR1
VR2
Figure 8
-15-
AV1 IN
ANT. 75Ω
L
R
AUDIO
VIDEO
(MONO)
S-VIDEO
MONITOROUT
AV2 IN
Mechanical Disassembly
CABINET BACK REMOVAL1. Refer to Figure 1, remove 14 screws.2. Pull off cabinet back and remove.
Figure 1. Cabinet Back Removal
When an abnormality occurs during TV reception, it causes pin 11 of the CPU to go continually Low (less than2.0V) for about 2 second. The CPU detects that this has occurred and outputs the signal from pin 54 to switch offthe 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.
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.
Protection Circuit
TV/AV MENUCH
-16-
Note: Parts order must contain Service Ref. No., Part No., and descriptions.
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
IMPORTANT:SCHEMATIC PART LOCATION NUMBERS MAY NOT ALWAYS MATCH THE SCHEMATIC SYMBOLS.THE SCHEMATIC SYMBOLS AND PART DESCRIPTIONS ARE CORRECT AND SHOULD BE USED.THE PART DESCRIPTIONS WILL BE LISTED UNDER THE LOCATION NUMBER IN THE PARTS LIST.
PRODUCT SAFETY NOTICE:Product safety should be considered when a component replacement is made in anyarea of a receiver.Components indicated by a mark in this circuit diagram show components whose values have special significance to product safety. It is particularly recommended thatonly parts specified on the part service manual be used for components replacementpointed out by the mark.
CIRCUIT DIAGRAM NOTICE:1. All resistance value are in ohms, K=1,000, M=1,000,000.2. All resistance rated wattages are 1/6W unless otherwise noted.3. Excepting electrolytic capacitors, all capacitance values of less than 1 are expressed in µ F and more than 1 are pF.4. All capacitance rated voltages are 50V unless otherwise noted.5. All inductance values are in µ H.6. Voltage readings take with a "VTVM" are from point indicated chassis ground. Voltage readings taken by using PAL
colour bar signal are with all controls at normal position. Some voltage may vary with signal strength.7. Waveform were taken with PAL colour bar and controls adjusted for normal picture. Waveforms were taken by using a
wide band oscillo-scope and a low capacity probe.8. This circuit diagram covers a basic or representative chassis only. There may be some components or partial circuit
differences between the actual chassis and the circuit diagram.9. Parts specified with "X" are not installed in this model.10. Parts specified with "J" are just jumper wires.
THE SERVICE PRECAUTION:The area enclosed by this line( ) is directly connected with AC mains voltage.When servicing the area, connect an isolating transformer between TV receiver and ACline to eliminate hazard of electric shock.
F8WA
TRANSISTOR, DIODE AND INTEGRATED CIRCUIT TERMINAL GUIDEC: COLLECTORB: BASEE: EMITTER
A: ANODEK: KATHODE
B
B
C
C
E
E
C EB C E
B
B
C
E
AK
K
A
A
K
FUSIBLERESISTOR
PARTICULARPARTS SYMBOL
1
1
1
N/2
N/2 + 1
N NON POLEELECTRICCAPACITOR
POSISTER
C
EB
CHIP COMPONENTS
K
A
TRANSISTOR
DIODE
123
RESISTOR
12 X 103=12K
Capacitance (Example)1000 C M 2000 D
CharacteristicCapacitance value (220pF)Allowable error (±20%)Kind (Ceramic)Rated voltage (1,000V)
J= ± 5%K= ±10% M= ±20%
Resistance (Example)1/2 N J 1.2
Resistance value (1.2Ω)Allowable error (±5%)Kind (M.carbon)Rated wattage (1/2W)