Video inputs: Phone jack x 2 (1Vp - p, 75Ω)
Audio inputs: Phone jack (L/R) x 2 (436mVrms, more than 40KΩ)
Video monitor outputs: Phone jack x 1 (1Vp - p, 75Ω)
Audio monitor outputs: Phone jack (L/R) x 1 (436mVrms, less than 600Ω)
Speaker . . . . . . . . . 8 cm x 13 cm x 2 pcs.
Sound Output (RMS) . . . . 5W + 5W
Dimensions . . . . . . . . . . . 652 (W) x 460 (H) x 490 (D)mm
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 differ from the design specifications. Refer to
the specification table.
1: An isolation transformer should be connected in the
power line between the receiver and the AC line
when a service is performed on the primary of the
converter transformer of the set.
2: Comply with all caution and safety-related notes pro-
vided on the cabinet back, inside the cabinet, on the
chassis or the picture tube.
3: When replacing a chassis in the cabinet, always be
certain that all the protective devices are installed
properly, such as, control knobs, adjustment covers
or shields, barriers, isolation resistor-capacitor networks etc.. Before returning any television to the
customer, the service technician must be sure that
it is completely safe to operate without danger of
electrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially constructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must be
the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X
- RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this
service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits,
take necessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high
voltage check to maintain the high voltage within the specified limits.
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 which
safety can be of special significance. It is particularly recommended that only parts designated on the parts list
in this manual be used for component replacement designated by mark . No deviations from resistance
wattage or voltage ratings may be made for replacement items designated by mark .
Page 3
-3-
Chassis Block Diagrams
MAIN SIGNAL PROCESSING CIRCUIT
5VRC
8
IC802
MEMORY
9V
CRT UNIT
R
180V
CRT
Q901
G
HV
180V
Heater
Heater
FBT
B
T471
130V
Q432
H-OUT
24V
Low B
ABL
AFC
24V
Protect
H
L902
DY
POWER SUPPLY CIRCUIT
V
Protect
T611
T431
TRANS.
H-DRIVE
Q431
H-DRAIVE
15
14
IC281
6
R-Y IN
35
40
CHROMA
11/12
IIC Bus
A101
TUNER
13
SECAM
7
B-Y IN
34
4
RF AGC
VIF
RF AGC
1
4/5
SECAM KILLER
B-OUT
R-OUT
G-OUT
21
20
19
51
42
Ext.VIDEO-IN
Ext.AUDIO-IN
9V-1
B
G
R
BLK
INT. VIDEO IN
SELECTED VIDEO-OUT
VIDEO-OUT
15
14
16
17
46
10
AFT
X161
SAW Filter
5
IF in
9
7
6
44
IC201
IF/VIDEO/
6
IF in
IF OUT
11
HOR.
VCC
9V
H-VCC
RGB
VCC
5V-2
Vol.
Mute
CC
VIDEO
VERT
V
CC
IF
V
SIF
Protect
Mono/St.
Stand by
18 25
43
8
52
54
SIF
out
in
36V
5V-2
9V-1
B
R
G
BLK
IIC Bus
20
21
22
19
AFT
10
27
8
30
23
CPU
IC801
5
3
SDA
6
SCL
4
12
Key in
28
R/C in
29
31
H-OUT
1
27
V-OUT
23
13
28
2
40
5
2
IC501
VERT./DEF.
1
ABL
FLYBACK PULSE IN
IC1201
SP901
15V
AUDIO SW
Protect
9V-1
5V-2
Reg.
9V
5VRC
15V
Reg.
TRANS.
CONVERTER
(L)
Lout
12
10
1
MUTE
SELECTED VIDEO OUT
AUDIO OUT ( TV AUDIO OUT)
1
R-IN
3
VOL.
2
MONO/ST.
(L/R or L/L)
IC001
AUDIO AMP.
7
3
SP902
36V
H-VCC
Reg.
Reg.
24V
130V
VR631
SWITCH
(R)
Rout
7
5
2
L-IN
R-IN
SELECTED AUDIO OUT (EXT. L )
R-OUT
Front
key
RC
A1901A
PRE-AMP.
D1910
LED
ANT
IIC Bus
VIDEO IN
L-IN(AUDIO)
R-IN(AUDIO)
FRONT
AV IN
L-IN(AUDIO)
VIDEO IN
REAR
AV IN
AUDIO MONITOR OUT (LEFT)
AUDIO MONITOR OUT (RIGHT)
R-IN(AUDIO)
REAR
MONITOR
VIDEO MONITOR OUT
OUT
Page 4
-4-
Chassis Block Diagrams
SYSTEM CONTROL
*Not equipped
QXXAVC320
A101
F/S TUNER
BASS EXPANDER CIRCUIT
KEY
SWITCH
BASS EXPANDER ON/OFF (ON=HIGH)
COLOUR SYSTEM OPTION INPUT
34
KEY SWITCH IN
11
12
IC2001
SCL
2
TELETEXT
SDA
1
IC201
IF/VIDEO / CHROMA/DEF.
PHOTO COUPLE
POWER ON/OFF
(ON=HIGH, OFF=LOW)
31
AFT SIGNAL INPUT
OSD BLK OUT(Active=High)
22
10
OSD BLUE OUT(Active=High)
OSD GREEN OUT(Active=High)
OSD RED OUT(Active=High)
19
20
211817
CIRCUIT
DEFLECTION
etc.
POWER CIRCUIT
HORIZ. SYNC IN (ACTIVE=LOW)
VERT. SYNC IN (ACTIVE=LOW)
(POWER ERROR=LOW)
POWER PROTECT IN
27
IC801
29
30
MUTE OUTPUT
SOUND VOLUME OUT
(ACTIVE=LOW)
(MUTE ON=HIGH)
IC001
AUDIO AMP.
CPU
QXXABV864
13
RESET INPUT (ACTIVE=LOW)
23
MONO/STEREO
24
TV/AV SWITCH
(TV=HIGH, AV=LOW)
SECAM KILLER INPUT (HIGH=SECAM)
IC1201
AUDIO SWITCH
26
SDA
34
56
SCL
28
33
RC SIGNAL IN
(ACTIVE=HIGH)
VIF-M OUTPUT (HIGH=NTSC3.58, LOW=OTHER)
32
(ON TIMER ON=Low)
CPU OSC IN
ON-TIMER LED OUT
LED
RC PRE-AMP.
7
6
CPU OSC OUT
OSC
X801
32.768KHz
IC802
MEMORY
Page 5
-5-
IC Block Diagrams
IC201 < IF/Video/Chroma/Def. > LA76818J-A-E
Audio 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 C
Sync output
Vertical Output
Ramp ALC Filter
Horizontal/BUS Vcc
Horizontal AFC Filter
Horizontal Output
VOL
DC
1
2
3
AGC
RF
4
56
7
VCC 5V
IF
8
9
10
11
BUS
12
ABL
13
14
CLAMP
15
16
17
18
VCC
1920
DRIVE/OUT-OFF
21
SYNC SW
FSC/
22
23
RAMP
VER
24
HOR
VCC
25
VCC
H
2627
HOR
OUT
SW
AGC
IF
VIF
CONTRAST
BRIGHT
OSD
OSD
SW
VER
C/D
SHIFTER
PHASE
CORING
VER
SEP
AFC2
STRETCH
REST
BRIGHT
MATRIX
DET
FM
PEAKING
LINE
SYNC
BLACK
SEP
DC
CONTRAST
RGB
AFC1
DET
AFT
DELAY
ACC
DEMO
AMP
LIM
VIDEO
COLOR
CLAMP
HOR
C/D
TRAP
SW
ON/OFF
BPF
PAL
SW
CLAMP
SW
ALC
1/256
BPF
TRAP
+
LPF
IDENT
IF
VIDEO
SW
APC1
TINT
VCO
HOR
VCO
SPLL
VIDEO
AMP
VXO
DDS
APC2
DC ADS.
1H DELAY
BPF
A2C
PLL
CLMP
CLMP
CLAMP
FBP
SIF Input
SIF APC Filter
525354
SIF Output
51
Ext. Audio Input
APC Filter
4950
VCO Coil 1
48
VCO Coil 2
47
VCO Filter
46
Video Output
Black Level Detector
4445
Internal Video Input (S-C IN)
V/C VCC
43
5V
Video/Vertical Vcc
42
External Video Input(Y-IN)
41
Video/Vertical/BUS Ground
40
Selected Video Output
39
Chroma APC1 Filter
38
4.43 MHz Crystal
Clamp Filter
Chroma APC2 Filter
353637
SECAM R-Y Input
(Cr Input)
34
SECAM B-Y Input
(Cb Input)
33
CCD/Horizontal Ground
32
CCD Filter
31
VCC
CCD Vcc
1H
30
Clock (4MHz) Outupt
VCO IREF
2829
Flyback Pulse Input
Page 6
IC Block Diagrams
-6-
IC201 <IF System Block Diagram> LA76818J-A-E
11
12
BUS
Interface
SAW
5
6
4
8
7
PIF
In1
PIF
In2
IF In
9V
30K
RF AGC
Out
120K
IF VCC
IF
GND
VIF AMP
VIF 1
VIF 2
VIF 3
IF AGC
Drive
RF
AGC
2ndIF
AGC
RF AGC
Delay
6bit
IF AGC
Def
1bit
+
-
(6 Vcc)/7
To
BUS
3
0.022u
PIF
AGC
IF
AGC
Data
Clock
APC
Det
+π/4
-π/4
Snd
Det
Amp
52
SIF.Out
Sound
Trap
Video
Det
Buzz
Canceller
50
APC
Filter
330
0.47u
+
PLL Pull-in SW
To
BUS
Lock
Det
Video.Level
3bit
Amp
54
10p
SIF.In
Sound
BPF
VCO.Coil
VCO
COIL1
VCO
COIL2
48
49
VIF
VCO
Chroma
Counter
B/N
INV
IF
Ident
OSC
C/D
Amp
SIF. Sys
2bit
pre-
scaller
SIF
VCO
500K
BPF
SIF
APC
Filter
1K
0.01u
1000p
53
LIM
AMP
FM
Det
FM.Level
5bit
Chroma
C/D
APC
Det
500K
Det
To
BUS
Chroma
VCO
VIF
Counter
Reset
Pulse
VCO
Ident
VIF.Sys
2bit
Phase
Detector
A.MUTE
1bit
VOLUME
D/A
VOLUME
Filter
A.SW
1bit
Input
Select
VOLUME
(ATT)
-
+
-
+
2.5V
Amp
FM Gain
1bit
Deem-TC
1bit
De-
emph
FM Mute
1 bit
2
9
46
51
1
A.Fil.Def
1bit
VOLUME
7bit
47
VCO
Alignment
AFT
10
AFT
Vcc
100K
100K
0.1u
VCO
Filter
+
0.47u
Audio.out
+
Audio in
10u
Video
Out
FM
Filter
+
1u
FM
Out
0.01u
+
to BUS Line
+
Page 7
-7-
IC Block Diagrams
Service Information
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
occurs during 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 than
0.75V) for about one second. The CPU detects that this has occurred and outputs the signal from pin 31 to
switch 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 again
via either the main power switch or the ON-OFF button on the remote control. This will work only if the power
supply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot be
restored and the circuit will have to be repaired.
Protection Circuit
IC501 < Vertical Output > LA78040/TDA9302H
IC001 < Audio AMP.> AN5274
IC281 <SECAM Decoder> LA7642N
IC1201<Audio SW.> NJM2533M
Thermal
Protection
-
AMP
+
Pump
Up
1
INVERTING
INPUT
2
Vcc
3
PUMP UP
OUT
4
GND
5
6
OUTPUT
Ver. OUTPUT
7
NON INV.
INPUT
STAGE Vcc
Volume
Ripple
Filter
+
Over
Current
Thermal
Protection
Circuit
VccEQU-Adj
16
Bell/EQU
Adj
1
F0-FilKil-Fil
2
Video In
1415
ACC
SW3
Bell/EQU
Filter
KILLER
ID-KIL
3
4.43DCID-Fil4M-DC
AV/SECAMKil-Out
13
System
SW1
ID
4
LIM
12
F0 Adj
5
4.43MHz In
11
PLL
DET
R-Y Out
SW2
Filter
6
GND
8
+
-
BUFFER
V out
7
10
VCO
7
B-Y OutGND
V+
6
4MHz InSC-In
Pulse
DET
Pulse
Clamp
SW/ALC
9
I/F
8
5
2
1
Ch.1 Input
Mute Control
3
45
Volume Control
Ripple Rejection
6
Ch.2 Input
Ripple Filter
7
Ch.2 Output
910
8
GND
Negative
Feedback Ch.2
111 2
Vcc
Negative
Ch.1 Output
Feedback Ch.1
1
Vin1
2
SW1
30kΩ
30kΩ
B
I
A
S
3
Vin2
4
Page 8
[1] Initializing Procedure
1. 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 following
picture 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
-8-
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].
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
CPU Debug Date.
Page 11
-11-
Service Adjustments with Replacing Memory IC(IC802)
[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 control
handset.
3. Adjust data value by pressing the VOLUME + or VOLUME
-
button on the remote control handset.
Example
MENU
0102030405......90...
...9089888786......01
MENU
TV/AV
MENU
+
-
P
SI. 00100101S2.11111000
ADDRESS
RF AGC
01
DATA
30
TIMER
SI. 00100101S2.11111000
ADDRESS
05
V-SCO
DATA
9
P▲
P▼
SI. 00100101S2.11111000
ADDRESS
21
DRV
DATA
R 64
B 64
Page 12
-12-
Service Mode Adjustments
Vertical size
Following adjustments should be carried out when the memory IC is replaced. How to enter the service mode and
adjust values, please refer to “ Entering to Service mode” on page 11.
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 contrast
controls 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 pressing
the 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
(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
c
d
e
Upper
Center
Bottom
Upper
a
Center
b
Bottom
Page 13
J
-13-
(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 mode to 0, 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
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)
Red Bias
-
Red Bias +
Green Bias
-
Blue Bias +
Red Drive +
Blue Drive
-
Blue Drive +
Green Bias +
Blue Bias
-
Red Drive
-
Press the MENU
button to exit
from service
mode.
TIMER
14
23
TV/AV
7
6
-/--
0
9
85
BASS
A B
SURROUND
P▲
P▼
MENU
PP
CH SCAN
SWAP
PIC MODE
JXMYA
D501
T471-H1
T471-H2
T471
T471-H5
FBT.
T471-H7
T471-H12
C471
FC3B
T471-H8
T471-H10
10
JP402
T471-H11
JP401
D485
KQ
T471
C491
R488
R481
C521
VERT.
OUT
R525
C524
R355
R516
C486
R485
R423
R492
R486
R484
R424
R426
R422
R475
Page 14
-14-
Service Adjustments
J895
C286
JW5
D682
R644
H
H
H
4
P
627
VR631
MAIN BOARD
+B VOLTAGE ADJUSTMENT
1. Connect DC meter to TP-B and the ground.
2. Tune the receiver to an active channel and synchronized
picture. Select NATURAL picture mode by pressing the
PICTURE MODE button on the remote control.
3. Adjust B-voltage to be 130 ± 0.5V DC by using VR631.
TP-B
FOCUS ADJUSTMENT
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 center.
E
4
R515
7
R
Focus VR (Upper side)
E
H
C3416
7
R
2
Vertical centre
SW501
VERTICAL CENTER ADJUSTMENT
1. Receive a monochrome circular pattern.
2. Set the brightness and contrast to maximum.
3. Adjust the vertical centre of the picture with SW501.
5
J3401
S
R
L
41A
3
Q
T
HIGH VOLTAGE CHECK
Note: +B (+130V) Voltage Check and Grayscale Adjustment must
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 voltage is within 24.0 KV and 26.5 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 28.0 KV at zero beam current.
If reading is not within range, check horizontal circuit.
No high-voltage adjustment is provided on this chassis.
C436
HORIZ. WIDTH ADJUSTMENT
1. Receive a monochrome circular pattern.
2. Set the brightness and contrast to maximum.
3. If the picture is too wide, remove “C436” on the main unit.
VR631
D610
21
34
J005
J001
T611-H2T611-H5
CONVERTER
T611-H8
T611
R445
C685
D686
R639
C628
T611
TRANS.
J641
R682
D685
R636
R635
R637
D632
J640
JW17
C635
C631
L441
L441-
2
Q641
D683
J680
R646
C645
L635
R638
JW16
D635
J635
J634
T611H17
T611H16
D634
C633
R642
T611H13
D633
R643
T611H11
J631
JW20
J630
D631
J351
J636
J350
D004
R644-H1
R662
R006
D003
R648
JW2
JW3
D684
R689
R681
R688
C681
Q684
C651
Q661
E
C662
J660
R663
R687
E
JW21
J651
IC651
J638
Q683
R686
E
R662-H1
J510
J897
C644
J225
J224
J223
D243
J352
J509
JW18
J233
J232
J234
J235
J231
J230
E
R647
C661
Q681
R661-H2
E
R661
D661
R661-H1
R662-H2
L634
C634
J681
J637
R243
C643
J639
D606
R602-H1
C605
C603
R602-H2
D603
R602-H3
C604
D604
R602A
C615
R622
R626
R619
C614
L621
J205
C629
C607
C613
Q612
R615
D619
D618
D614
Q613-H1
D617
E
B
POWER
Q613-H3
OUT
Q613-1
L610
J601
C617
R628
TP-B
C434
R434
S601-H2
3
JP601
D605
PS601-H1
+B ADJ.
PS601
C607-H1
C607-H2
R621
R617
R623
R611
J249
R624-H1
R624Z
R624
D616
J250
C
Q613-H2
R625-H1
Q613
R627-H1
C616
C641
L631
R620
Q611
J003
J002
R624-H2
J251
R625-H2
R625
R627-H2
R627
R629
C441
C441A
1-H7
T471-H8
10
T471-H12
C471
FC3B
T471-H10
JP402
T471-H11
KQ
86
T471
JP401
D485
R485
R492
R484
C491
R424
R488
R481
R422
R475
IC501-H2
R514
J505
R423
R486
R426
J501
C514
D421
D467
D486
D476
R479
C469
C449
C515
R502
D468
D448
J423
E
Q449
JP1407
02
J1506
JP1403
J026
C1502
IC1501
J1503
JP1503
L431
R435
T471
FBT.
432
H-OUT
J436
C435-H2
C435-H1
C435
C435A
C437
T471-H1
T471-H2
D441
Q432-H2
C436
C436A
C435-H3
KDY-H1
Q432-H5
KDY-H3
KDY
D501
C521
IC501
VERT.
OUT
R519
24
C433
T431
H-DRIVE TRANS.
T471-H
J431
T431
J683
J682
D681
J832
J896
2
442-H2L442-H1
L442
JP442
R442
KDY-H6
J502
IC501-H1
C517
J503
J504
D512
J028
R512
C518
R503
J508
J507
JP503
J506
R511
R510
C510
R501
JW10
C527
VER
J280
R285
C284
JW19
J353
R352
R228
JP183
J204
J218
J439
J1401
C1401
IC1401
D1006
C3432
D1005
C3439
JP104
IC3401
C3427
C3424
C1013
J171
C3436
R3401
R3402
JP3401
C3404
C3408
C3411
C3416
C3418
C3417
R512
IC501-H2
C520
J028
C527
R522
C449
JW10
VERT. CENTER
J501
D468
D448
E
Q449
SW501
501
C3424
J1501
J421
J422
C515
R502
C1502
J1503
J423
JP1407
FC3B
T471-H5
T471-H12
C471
1
T471
FBT.
T471-H7
T471-H10
T471-H8
10
T471-H11
JP402
R355
T471
JP401
D485
C491
R424
R488
R481
KQ
IC501
VERT.
OUT
C518
R519
R525
C524
R518
R516
C486
R484
R515
R514
R485
J505
R423
R492
R486
C514
R426
D421
D467
D486
D476
R422
R479
C469
R475
C3418
C3417
C1013
C1012
J1506
IC1501
C3414
R1026
J3406
R1028
J3407
J1402
JP1403
J026
J1401
C1401
IC1401
JP1503
Page 15
-15-
Special Function
Once TUNING LOCK is switched on, further channel tuning
(Pre-set) is not possible. The Channel Swapping function also
is not possible.
(2) Tuning Lock setting
The following special functions can be set up on this TV
set.
With this function, a maximum sound volume limit can be set at
any 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 any
picture 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
MUSIC
Turns black
screen
SOUND BASS ON
18
(1) Volume Lock setting
1
To enter into the special function setting mode, press and
hold the MENU button of the remote control, then press the
PROGRAMME 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.
MENU
VOLUME LOCK
TUNING LOCK
MUSIC MODE
AV START
+
-
P
SELECT ADJUST
OFF
OFF
OFF
OFF
M
EXIT
P▲
P▼
VOLUME LOCK
TUNING LOCK
MUSIC MODE
AV START
SELECT ADJUST
OFF
OFF
OFF
OFF
M
P▲
P▼
VOLUME LOCK
TUNING LOCK
MUSIC MODE
AV START
SELECT ADJUST
OFF
ON
OFF
OFF
M
MENU
EXIT
EXIT
Page 16
-16-
Purity and Convergence Adjustment
RED
BLUE
Adjust tabs together to
superimpose red and
blue horizontal line.
Figure- 2 BLUE AND RED LINE MOVEMENT
Figure- 3 BLUE/RED AND GREEN MOVEMENT
Adjust tabs together to
superimpose red/blue
and green horizontal
line.
Adjust tabs angle to superimpose
blue and red vertical line.
Adjust tabs angle to superimpose
red/blue and green vertical line.
GREEN
BLUE / RED
CAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustment
should be made only after picture tube or deflection yoke replacement, following the steps below:
PURITY ADJUSTMENT
1. Demagnetize the picture tube and receiver using an external
degaussing coil. When replacing picture tube or deflection
yoke, mount deflection yoke and purity-convergence magnets
assembly properly, see figures 1 and 4.
2. Turn Red and Blue guns off and provide only Green raster.
Rotate Screen control to fully counterclockwise. Rotate Red
and Blue Bias controls fully counterclockwise. Slowly rotate
Green Bias control clockwise to produce Green raster.
3. Loosen the screw holding the Deflection Yoke and remove the
3 Rubber Wedges, and slide the Deflection Yoke fully forward.
4. Rotate and spread the Tabs of the two Purity Magnets to centre the vertical green belt in the picture screen. The Purity
Magnets are also adjusted to obtain vertical centring of the
raster.
5. Slowly slide the Deflection Yoke backward until a uniform
green 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 are
pure.
7. Adjust each Bias control and screen control to obtain white
raster. Refer to Gray Scale Adjustment. If part of the picture
screen is coloured, adjust the Deflection Yoke position forward
or backward slightly.
8. Tighten the mounting screw of the Deflection Yoke. Adjust
Convergence next.
CENTRE CONVERGENCE ADJUSTMENT
1. 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, and
superimpose the Red and Blue vertical lines in the centre area
of the picture screen. Refer to figure 2.
3. Keeping the mutual angle of the Tabs of the Four Pole Magnet
turn them together to superimpose the Blue and Red horizontal lines in the centre area of the picture screen. Refer to figure 2.
4. Turn Green gun on and adjust Six Pole Magnet 3 and 4 that
the 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 ADJUSTMENT
Slightly loosen the screw holding the Deflection Yoke. Adjust the
Deflection Yoke to converge the detail in the outer area (left side
and right side) of the picture screen by orbital movement of the
front of the Yoke, then secure the Deflection Yoke in appropriate
position by putting the wedges as illustrated. Tighten screw holding the Deflection Yoke.
Figure 4. Deflection Yoke Movement
Figure 1. Purity and Convergence Magnets
Figure 5. Adjusting Magnet
Note: The form of deflection yoke changes with models.
PURITY
MAGNET
TABS
SIX-POLE
MAGNET TABS
4
3
1
2
FOUR-POLE
MAGNET TABS
ANGLE
OF TABS
FOCUS GAP
(G3-G4)
DEFLECTION YOKE
DEFLECTION YOKE
MOUNTING SCREW
RUBBER
WEDGE
ANGLE OF MAGNET TABS
MAGNET TABS
Page 17
-17-
Mechanical Disassemblies
Figure 2. Picture Tube Removal
CABINET BACK REMOVAL
1. Refer to Figure 1, remove 8 screws.
2. Pull off cabinet back and remove.
CHASSIS REMOVAL
1. Remove cabinet back.
2. Discharge the picture tube anode (2nd anode lead) to the dag
coating (picture tube grounding lead).
4. Remove chassis completely by sliding it straight back.
PICTURE TUBE REMOVAL
CAUTION: Do not disturb the deflection yoke or magnet
assembly on the picture tube neck. Care must be taken
to keep these assemblies intact, unless picture tube is
being replaced . Discharge the picture tube to the coating 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 ground
ing lead on the picture tube. See Figure 2.
Note: If the Picture Tube is being replaced, mount the
Degaussing Coil on the picture tube. See Figure 2.
Figure 1. Cabinet Back Removal
R
AUDIO
L
VIDEO
MONITOR
AV1 INPUT
OUT
(MONO)
ANT. 75‰
DEGAUSSING
COIL
DEGAUSSING
COIL SOCKET
PICTURE TUBE
To CRT
GROUND LEAD
unit ground
DEGAUSSING
COIL HOLDER
Page 18
-18-
Cabinet Parts List
Note: Parts order must contain Service Ref. No., Part No., and descriptions.
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 have
special significance to product safety. It is particularly recommended that only parts specified on the following parts
list 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 and
flyback transformer. They should be ordered separately.
NOTES:
Read description in the Capacitor and Resistor as follows:
CAPACITOR
CERAMIC 100P K 50V
Rated Voltage
Tolerance Symbols:
Less than 10pF
A : Not specified B : ±0.1pFC : ±0.25pF
D : ±0.5pFF : ±1PFG : ±2pF
R : ±0.25-0pF S : ±0-0.25pF E : +0-1pF
More than 10pF
A : 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%
Rated value: P=pico farad, U=micro farad
Material:
CERAMIC...........Ceramic
MT-PAPER.........Metallized Paper
POLYESTER......Polyester
MT-POLYEST.....Metallized Polyester
POLYPRO..........Polypropylene
MT-POLYPRO....Metallized Polypropylene
COMPO FILM.....Composite film
MT-COMPO........Metallized Composite
STYRENE...........Styrene
TA-SOLID...........Tantalum Solid
AL-SOLID...........Aluminium Solid
ELECT................Electrolytic
NP-ELECT..........Non-polarised Electrolytic
OS-SOLID..........Aluminium Solid with Organic Semiconductive Electrolytic
DL-ELECT..........Double Layered Electrolytic
RESISTOR
CARBON 4.7K J A 1/4W
Rated Wattage
Performance Symbols:
A: General B: Non flammable Z: Low noise
Other: Temperature coefficient
Product safety should be considered when a
component replacement is made in any area
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 that only
parts specified on the part service manual be
used for components replacement pointed 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 oscilloscope 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 AC
line to eliminate hazard of electric shock.
11. Expression of capacitance and resistance in circuit diagrme.
C5GSR
CE21KF8R-00
R IN
L IN
V IN
L
SP901
A10B26200
R
SP902
A10B26200
K001
X
K1003
J12B1522N
JP002
SW1906
S10B0450J
:S10B2790J
:S10B3670J
SW1905
S10B0450J
:S10B2790J
:S10B3670J
SW1904
S10B0450J
:S10B2790J
:S10B3670J
SW1903
S10B0450J
:S10B2790J
:S10B3670J
SW1902
S10B0450J
:S10B2790J
:S10B3670J
SW1901
S10B0450J
:S10B2790J
:S10B3670J
J
R1032
R1033
JP003
J
K002
J10EA030N
:J10KR030N
K003
J10EA040N
:J10KR040N
D1910A
1AA2HLM0
(212:412)--
D1910
SPR-39MVWF
GREEN
RED
K1003A
X
X
X
AV/TV
FUN
CTION
VOL.-
VOL.+
POS.-
POS.+
A1901A
U20B32400
:U20B35900
L81B30800
:L81B30900
W10B03901
C1001
EM10
R1001
1/16GJ
75C
< L OUT >
< R OUT >
R1913
220
L901
F35B0570N:
F35B1130N:
B4F35B0040N
W901
R1020
1/16GJ
2.2KC
R1018
1/16GJ
10KC
L601
R1010
1/16GJ
2.2KC
1/16GJ
10KC
5VRC
R1008
R888
560
R012
2.7K
R1911
220
1/16GJ
5.6KC
R1903
1/16GJ
12KC
R1902
1/16GJ
27KC
R1901
C1017
1/16GZ0C
D1002TM
MTZJ9.1A
:RD9.1EB1
:UZ-9.1BCB
R013
2.7K
R1906
1/16GJ
2.2KC
R1905
1/16GJ
3.9KC
R1904
X
R1907
100
D1901
X
JP1002
EM1
JP1001
C1007
EM1
JP001
Q1902
R1912
220
C1902
EM22
1
KE-1
J30B0250N
:J30B1380N
KE
X
JP602
KE-2
J30B0250N
:J30B1380N
2
PS601-H1
PS601-H3
KE-1/KE-2
J30B0250N
ERZV14D471
S10B6110N
KG-1
J30B0250N
:J30B1380N
1
J30B0250N
KG-2
:J30B1380N
2
KG-3
J30B0250N
:J30B1380N
3
KG-1/KG-2/KG-3
J30B0250N
MTZJ9.1A
:RD9.1EB1
:UZ-9.1BCB
C012
25EM
470
X
C013
25EM
470
AC
JP601
J
SW601
X
R1012
1/16GJ
1.8KC
R1006
R1005
D1001TM
R887
1/16GJ
22KC
X
2400030
2400030
PS601
DHXAA
EV0070
L601-H5
L601-H6
VA601
SW601-H1
2400010
2400010
SW601-H3
K1002
X
D1081
X
Y/VIDEO(L/H)
2SA564A2SA10152SA933S
R
Q,R
Y,GR
O,Y,GR
R OUT
G OUT
B OUT
J10EA050N
:J10KR050N
K7P
(C)
(Y)
D1082
X
C1083
X
R1406
X
D1402
X
S-TERMINAL=L
1
R
G
B
GND
5
KP
REAR
V IN
L IN
R IN
K1001
J12B2430N
V OUT
L OUT
R OUT
K1004
X
S-TERMINAL
JP3405
R FRONT IN
VCC
R871
1/16GJ
10KC
Q871
AH
1.2K
R801
1/16GJ
270KC
C894
KK
0.033GQ
L621
R624Z
Q612
2SC3807
RYA
C615
FJ0.015BE
:FJ0.015D
GND
R004
1/16GJ
22KC
C008
25EM
10
R009
R870
1/16GJ
22KC
R624-H2
X
R838
1/16GJ
15KC
CJ
56CGQ
R624
5WJ22
(K:V:VC)
Q613-H
1AA2HE
A0008--
NFR
C837
IC801
IIC
18
5DA
IIC
2
SCL
EPROM
3
EPROM
4
5
VSS
6
XIN
7
XOUT
8
VDD
9
SIF OPT
AFT
10
S-CURVE
11
C-SYS
12
KEY-IN
13
RES
14
FILT
15
C-CAPTION
16
BILINGUAL
17
VS
HS
R877
KK3300GQ
R624-H1
24000102400010
R REAR IN
V REAR IN
Rout
C003
16EM
100
C023
FK0.047
BE
R019
DJ10
SDA
SCL
OPT
V-SYNC
C616
2000KK1500
(CRD:CTB)
L610
ZZ0122
Q613
2SC4429LYB
:2SC4429MYB
RF
C002
X
C020
16EM22
R031
1/16GJ
100KC
R839
1/16GJ330C
C836
CJ56CGQ
QXXAVC320P
STATUS
ACK
(BASS)
X-SW
VIF-M
ON-TIMER
(H=ON)
POWER
(L=OFF)
VOL
MUTE
(H=MUTE)
REMOCON
POWER
FAIL
SECAM
KILLER
/AV1/AV2
TUNER OPT
S-TERM
TV/AV
MONO
/ST
BLK
C628
R625
2SJ39
R625-H1
2400010
Q613-H3
C617
FK0.033A
:FK0.033BE
:FK0.033D
R628
1/2CK
5.6MXG
R625-H2
Rin
R023
1/16GJ
1.8KC
Q011
IN
B
G
R
X
24000302400030
2400030
2400010
2400010
C006
EM1
AH
R840
1/16GJ
330C
Q613-H2
Q613-H1
36
35
34
25KZ0.1GQF
33
32
31
30
29
28
27
26
25
24
23
22
21
20
1918
R627-H2
R627-H1
C629
250KK3300XH:
250KM3300XN
L FRONT IN
V FRONT IN
9V
R1015
1/16GJ
R1014
12KC
1/16GJ
27KC
Q1002
AH
R1013
1/16GJ
4.7KC
9V
R1016
X
R1002
1/16
GZ0C
X
Q1001
X
X
R1011
1/16GJ
5.6KC
5VRC
ON TIMER
R861
1/16GJ
1.5KC
R862
1/16GJ
8.2KC
D861
RD3.6EL
:DZXLBB017
KEY SW
ON TIMER
POWER ON/OFF
R886
1/16GJ
22KC
Q886
AH
POWER ON/OFF
POWER ON/OFF
C627
X
D603
C603
R602
10WK3.9
R602A
(I:VC)
X
XX
XX
24000102400010
R602-H4
R602-H1
R602-H2
R602-H5
R602-H6
R602-H3
C604
D604
C603/.../C606
1000KK1000CR4C 1000KK1000CR4C 1000KK1000CR4C
1000KK1000CR4C
2400030
PS601-H2
C602
250GM0.1XBJ:
275GM0.1VB
R611
5.6K
L601-H4
2400030
2400030
X
X
L601-H1
L601-H8
L601-H3
L601-H7
L601-H2
24000302400030
X
X
C601
250GM0.1XBJ:
275GM0.1VB
F601A
J20B0170J
F601B
J20B0170J
4A250VT
R601
SW601-H2
2400010
2400010
SW601-H4
1/2DJ
220K
:4A250VTW
:4A250VTS
L801
L2B95R6KN
C862
25KZ
0.1GQF
5.5M
4.5M
C605
C606
D603/.../D606
ERC05-10BERC05-10BERC05-10BERC05-10B
Q611
AC
F601
D003
AA
R006
2.2K
C811
KK0.01
GQ
1
2
3
VSSSDA
C805
16EM10
Q861
AJ
1/16GJ
47KC
C861
EM0.1
KEY SW
C607
400EM270XB:
400EM270XM:
400EM220XF
D605
C607-H2
C607-H1
D606
D619
MTZJ11A
:RD11EB1
TP-EE
J30B0250N
:J30B1380N
P.F
15V
D004
MTZJ7.5A
:RD7.5EB1
C010
25EM1000
IC802
24LC08B/P:
S524A60X81:
QXXAVC359
EEPROM
C806
25KZ
0.1GQF
R863
:UZ-7.5BCA
SCL
Lout
NFL
121110987654321
R003
1/16GJ22KC
C009
JP801
DJ10
R007
R891
X
1/16GJ
10KC
X
C801
CJ15CGQ
R819
R841
1/16GJ
4.7KC
C802
CJ27CGQ
R875
1/16GJ
10KC
R812
1/16GJ
10KC
R893
1/16GJ
1MC
C891
C896
C892
25KZ
0.1GQF
C-CAPTION
C022
25EM
10
R015
1.2K
R837
1/16GJ
15KC
R842
1/16GJ
4.7KC
X801
V10B0
(560N:570N)
C803
KK0.01
GQ
C804
KK0.047
GQ
C816
KK0.01
GQ
R894
100
X
X
R892
1/16GJ
470KC
5VRC
C807
X
VDD
1/16GJ2.7KC
1/16GJ4.7KC
R817
1/16GJ
2.7KC
R895
X
FK0.047BE
7
6
54
R876
R811
C893
EM2.2
PB101
PWB MAIN: 1AA4B10S0120A_A
UNIT MAIN: 1AA0B10S103GA