Sanyo C29LF34 User manual

SERVICE MANUAL Colour Television
-
+
P
MENU
TV/AV
Specifications
Power Source . . . . . . . .AC110 - 240V, 50/60Hz.
Colour System . . . . . . .PAL(M/M, N/N) NTSC(M/M)
Channel Coverage
Antenna mode . .VHF: CH02-CH13, UHF: CH14-CH69
CATV mode . . . .VHF band: CH01-CH13, Mid band: CH14-CH22
Super band: CH23-CH36, Hyper band: CH37-CH64
Ultra band: CH65-CH94 and CH100-CH125
Low mid band: CH95-CH99
Video IF . . . . . . . . . . . . . 45.75MHz
Aerial Input Impedance 75Ω
Ext.Terminals
Video inputs: Phono jack ✕2 (1.0Vp
- p, impedance 75Ω)
S-Video Input ✕1 (Din 4 pin, SeparateY/C Signals Input)
DVD Input: Component Video Jack-Y ✕ 1 (1.0Vp-p, impedance 75Ω)
Component Video Jack CB/CR ✕ 1 (0.7Vp-p, impedance 75Ω)
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 ......... 5cm ✕12cm ✕ 4
Sound Output . . . . . . . . 7.5W + 7.5W
Dimensions . . . . . . . . . . 750(W) ✕582.5(H) ✕503(D)mm
Weight . . . . . . . . . . . . . .approx. 46.8 Kg
Specifications subject to change without notice
Product Code: 1 113 516 11
Chassis Series: FA1-A
C2SM
FILE NO.
Model No. C29LF34
Service Ref. No. C29LF34-00
(Argentina)
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.
VIDEO
MODE AUDIO
MODE
POWER
0
7
1
4
8
5
23
6
9
P▲
P▼
RECALL
MENU IMAGE
SLEEP
CH ▲
VOL
DISPLAY MUTE
SOUND SURROUND
JXMGY
CH ▼
VOL
-
+
123
4
7
5
8
0
6
9
REFERENCE NO. SM5110146
Original Version

Contents
-2-
Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Service Mode Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-20
Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Purity and Convergence Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 21-22
Mechanical Disassembles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chassis Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-42
Safety Notice
SAFETY PRECAUTIONS
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 net-
works 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 con-
structed 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 ser-
vice 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 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 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 .

Chassis Block Diagrams (MAIN SIGNAL PROCESSING CIRCUIT)
COMP. VIDEO
A101
TUNER
IIC Bus
SOUND
CARRIER TRAP
(4.5MHz)
IC302
VIDEO SW
Y
IC1001
AV SELECTOR
V
L
R
MONITER OUT
AV1 INPUT
V
L
R
S-IN
CR
CB
Y
L
R
AV3 INPUT
DVD IN
IC7901
VIDEO CONTROL
TINT
IIC Bus IC301
COMB FILTER
CY
CLK
IIC Bus
IIC Bus
IF OUT
Y/COMP.
C-IN
R-Y
B-Y
IC801
CPU
IC802
MEMORY
IIC Bus
IIC Bus
OSD
(R/G/B) IIC Bus
X' TAL-PAL
X' TAL-NTSC
R/G/B
V-OUT
H-OUT
MTS UNIT
IC3401
MTS TV-L OUT
TV-R OUT
L-OUT
R-OUT
IIC Bus
IC211
H.V.
Q431
H-DRIVE
IC501
VERT. DEF.
CRT UNIT
IC001
AUDIO AMP.
IC3501
Q-SOUND IC3401
BBE
SP901
CRT
V
L
R
AV2 INPUT
(FRONT)
SUB UNIT
MAIN UNIT
BACKTERMINAL UNIT
26
7
25
38
39
2
5
7
10
23
1
13
11
L-OUT
R-OUT 17
87
18
L-OUT
R-OUT
X161A
SAW-FILTER
6/7
HEADPHONE
JACK
52
SUB UNIT
TV COMP.
41
3
5
Y
C
7
2
4
D.L.
D.L.
TO IC201 PIN-44
TO IC201 PIN-43
13
14
16
8
10
34
3
COMP. VIDEO
23 25 29 31
37
39
1
C-OUT
34
736
COMP. VIDEO
34
35
40
42 TV-L IN
TV-R IN
32
33 L-OUT
R-OUT
R
L
25 22
10
8
R-Y
B-Y
FROM IC7901
1
44 43
23/28/30
OSD
(R/G/B)
40/41/42
32
40 5
3
7
19
CLK
18/19/
20
VIDEO
DET.
IC201
IF/VIDEO/CHROMA
3
23
COMP. VIDEO
Y-OUT 21
12
R
B
G
YVELOCITY
CIRCUIT
SVM Coil
From
IC302 pin-7
140V
TO Velocity Circuit
42
Q432
H-OUT
DY
VERT. DY
T471
FBT FOCUS
SCREEN
HORIZ. DY
PINCUSHION
CIRCUIT
(Q461,Q462)
8/9
32/34
31/33 5/6
911
COLOR
IC7905
DAC From
IC801(CPU)
43
14/15
19/
20
From IC801(CPU)
pin-32/34
22/23
10/14
SIF
FILTER
(4.5MHz) 3
48
SIF IN
AUDIO OUT
AFC UNIT 17
4
NTSC/PAL CTL
2
M/N CTL 1
(NTSC)
(PAL-M)
(PAL-N)
SP904
SP903
SP902
L-OUT
R-OUT
AV2 VIDEO IN
AV1 VIDEO IN
DVDY-IN
Y IN
C IN
AV1 AUDIO L-IN
AV2 AUDIO L-IN
AV3 AUDIO L-IN
AV1 AUDIO R-IN
AV2 AUDIO R-IN
AV3 AUDIO R-IN
TV COMP.
FM
DET.
-3-

-4-
28
7
KEY SWITCH IN KEY
SWITCH
TV/AV SWITCH OUT
(TV=LOW, AV1/AV2/AV3=HIGH)
SCL (To BUS IC)
34
32
15
29
SDA (To BUS IC)
POWER ON/OFF PHOTO
COUPLE
(ON=HIGH, OFF=LOW)
IC801
CPU
QXXAVB686
39
42 41
40
1
2
24
3133
20
19
6
23
ADJUSTMENT DATA IN
OSD BLK OUT
OSD RED OUT
OSD GREEN OUT
OSD BLUE OUT
DEFLECTION
CIRCUIT
HORIZ. SYNC IN (ACTIVE=LOW)
VERT. SYNC IN (ACTIVE=LOW)
POWER PROTECT IN
(POWER ERROR=LOW) POWER CIRCUIT
etc.
SCL
SDA
IC802
MEMORY
OSC
8MHz CPU OSC OUT
CPU OSC IN
LED ON-TIMER LED OUT (ON=LOW)
RC SIGNAL IN
(ACTIVE=LOW)
RC PRE-AMP.
8 38
IC001
AUDIO AMP.
VIF-M OUT NTSC3.58=HIGH, OTHER=LOW
PAL-N OUT (PAL-N=HIGH)
PAL-M OUT (PAL-M=HIGH)
17
SOUND MUTE OUT (MUTE ON=HIGH)
IC301
QTC9090ANM
COMB FILTER
VIDEO SW
AFT IN
30
IC201
QXXAVB488M
VIDEO / CHROMA
IC1001
QMM1313BD
AV SELECTOR
A101
TUNER
IC3401
UPC1851BCU
MTS DECODER
IC7905
CX1315P
IN/OUT EXPANDER
IC3401
BBE 5
BBE CONTROL (OFF=HIGH, ON=LOW)
IC302
VIDEO SW 12
Y/C, COMP. SW (Y/C=LOW, COMP.=HIGH)
IC3501
Q-SOUND 13
3D SURROUND ON/OFF (ON=HIGH)
14
3D STEREO ON/OFF (ON=HIGH)
3
4 2
10
6
56
15
14
23
22
19
20
SCL
SDA
8
9
14
10
SCL
SDA
DVD TINT CONTROL
DVD COLOUR CONTROL 3
4
9
Chassis Block Diagrams (SYSTEM CONTROL)

IC Block Diagrams
-5-
IC201 < IF/Video/Chroma> QXXAVB629
VIF IN
IFAGC OUT AFT
TV IN
EXT IN
AUDIO
OUT
33
29
35
26
37
40
32
13
44
43
11
15
16
12
2725242122412819201830239101445
QXXAVB241
SYNC IN
KILLER FILTER
IDENT FILTER
COLOURAPC
AFAMP
AFAMP
4.5/6.0
SIF IOADJ BUS
I/F
FM DET
LIMITTER
B EXIT INPUT R EXIT INPUT G EXIT INPUT V SYNC TRIG
SYNC SEP.
SYSTEM ID
EQ ELIMINATE
BGP GENE.
PHASE CONT
KILLER DET
LOCK DET
ID DET
CHROMA APC DET
PAL SW
SECAM FF
SELF ADJ
V.RAMP
AFC
AFC
1H DL
VCXO
ACC DET
F/F
2NDAMP
CHROMA BPF
1STAMP (ACC)
HPF
AFT
AFT OUT
VIDEO
MUTE
H STOP
H.PHASE
AUDIO MUTE SW SDA
SCL FAST BLK B IN
R IN
B-OUT
R- OUT G-OUT
G-IN
H-VCC SECAM REF
V.SIZESERVICE
SW
H-OSC
SELFADJ.
CLAMP
50/60 OUT
R
TINT
B
R
DRIVE
BG
ABCL
ABCL
ID CUT BLUEBACK
WHITE BACK
COLOR
CONTRAST
SERVICE BRIGHT
STATION DET STATION
SYSTEM SET SYSTEM
IFAGC
DELAYADJ
DEFEAT
DLTIME DLFINE
VIDEO
VCC
VIDEO
GND
DEFLECTION
GND
TRAP SW
D.TRAP
F.TRAP
BLACK STRECH OFF
FAGC
VIDEO DET
VIF AMP
APC DET ADJ DET
BLACK STRECH
VIDEO TONE
CHROMA TRAP
VIDEO MUTE
CLAMP
SHARPNESS
CONTRAST
DELAY
FEF FILTER
AGC
R-Y IN
B-Y IN
H OUTPUT
SYSTEM DECODE
BRIGHT
CHROMA DEMODULATOR
DR/VE AMP
AFC GAIN
RGB MATRIX CONTRAST
32 FH VCO
MUTE DET
HV BLK
VERTICAL COUNTDOWN HORIZONTAL COUNTDOWN
EXITAUDIO
IN
GND
VCC
VIF
SIF
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-OUT
V-FB
V RAMP
BLK
AUDIO
DIRECT
OUT
AF DC
FB
HI VCC
IF OUT
IFAPC
IF VCO
IF VCO
BLACK
PEAK ACL/CLK Y-SW
OUT
X TAL 4.43
X TAL 3.58
BLACK PEAK
QXXAVB629

-6-
IC501 < Vertical Output > LA7841
THERMAL
PROTECTION PUMP UP
AMP
-
+
GND
Ver. Output
Output Stage Vcc
Non Inv. Input
Inverting Input
Vcc
Pump Up Output
LA7841
123 4 567
IC001 < Sound Output > LA4270
IC Block Diagrams
VIDEO ADC LINE
MEMORY
CLAMP
BPF
BPF
BPF
VERTICAL
ENHANCER
SECAM
4.43 NTSC
DYNAMIC
COMB FILTER
PLL
BPF
BPF
PEDESTAL
CLIP
CORING
CHROMAKILLER
++Y DAC
C DAC
Y-OUT
C-OUT
25
23
1 LINE DOT
IMPROVEMENET
I2C BUS
19
3
8/9
BUS
CLOCK
+
-
4fsc
fsc 4fsc TC9090ANM
CH1
CH2
Thermal
Shutdown
Over
Voltage
Ripple
Filter
30K
300
30K
300
Vcc
-
+
+
-
Feedback 1
Input 1
Ripple filter
Input side earth
Input 2
Feedback 2
Output 2
Output side earth
Power supply
Output 1
LA4270
IC301 <COMB Filter> TC9090ANM

-7-
IC Block Diagrams
1
GND
2
3
4
DETR
CTL
DEFR
5
6
CTL
VCAR
R-MIX
7
R-OUT
VCA
8
R-IN
9
APFR
10
HPFR HPF
LPF
11
LPFR
12
BIASC
LD
–
++
HI MID
+
+
++
CTL
24 DETL
23
22 DEFL
VCA 21 VCC
20 VCAL
19 L-MIX
18
17
16
L-OUT
L-IN
15
14
13
APFL
HPFL
LPFL
HPF
LPF
+
++
+
MID
LO
+
+–
HI
IC3401 <BBE> QBA3880AFS
23
Delay
T1 T2
Gate
Common
4
5
1
STR81145A
r1
r2 r3
Z1
Q1
Z2
Q3
Q2
Triac
IC1601 < Double Rectifier > STR81145A
8765
4
3
2
1
BIAS
BUFFER
GND Vout V+Vin3
CTL2
Vin2
CTL1
Vin1
CONTROL INPUT - OUTPUT SIGNAL
CTL1 CTL2
OUTPUT SIGNAL
LLVin1
HLVin2
L/H HVin3
NJM2234M
IC211 NJM2234M

-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
VOUT2
23
YIN1
34 VOUT1
6dB
38 Vcc
6dB
-6dB
COMB
IC3501 < 3D Surround Processor > MM1369
SIMULATED
STEREO
SIMULATED
STEREO
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-
87
BUFFER
65
4
3
2
1
Vin1 CTL Vin2 NC
Bias
NC
V
Vout
GND +
IC302 QNJM2233BD
IC Block Diagrams
IC7905 <DAC> QCXA1315P
1 2 9 10
13 12 11
14
15
34 5 67
LEVEL
CONVERT
Power
On
Reset
I2C BUS
SDA
SCL
VCC
REG
LEVEL
CONVERT LATCH
SAD2 SAD1 SAD0
SLAVE ADDRESS SELECT
SW0~3
SW IN/OUTPUT
LEVEL
CONVERT
I2C DECODER
LATCH LATCH LATCH
DAC DAC DAC DAC
AMP AMP AMP AMP
DAC4 DAC3 DAC2 DAC1 DAC0
LATCH LATCH
DAC
AMP
VCC
GND
DAC OUTPUT

-10-
IC Block Diagrams
7
12
8
910 11 15 18 14 13 17 16 20
Noise BPF
Noise
Detector I2C Bus
Interface
SAP Demodulation Block
Composite Signal Input
2.2µF
0.1µF
0.047µF
SAP Signal Detector
SAP Offset Absorption
0.47µF0.1 µF
68KΩ
5.1 KΩ
16.6 KΩ
Noise Detector
+
+
+
23 22
24 46 3
5
4.7µF
1µF
0.1µF
+
1KΩ
2
22µF
+
1/2Vcc
42
1µF
+
34 35 38 36 39 37 41 40
Filter Control
Stereo
Demodulation
Block fH
LPF fH
Trap
Switch
75µS
De-emphasis Offset
Absorption
dbx Noise
Reduction
Block
Matrix Selector
Block
Surround
Block
Tone Control Block
Volume Control Block
33 32 31
26
25
21
28
29
302719
1
2.2µF
+
0.1µF 2200pF
+Vcc
+
+
10 µF
10 µF
D/A
2.2µF
+
0.1µF
+
2200pF
0.022µF
4.7µF
+
1 µF
+
10 µF
+
3.3 µF
+
1 µF
+
1 µF
+
3 KΩ
1 µF
+
D/A
Input
Attenuator
I2C Bus
Interface D/A
Filter
Power Supply
Reference Voltage
Pilot Detector 1
Pilot Detector 2
Phase
Detector 1
Phase
Detector 2
SAP Signal Output
SAP Signal Input
Spectral Timing Setting
VCA Offset Absorption
Wide-band Timing Setting
Wide-band RMS Setting
Spectral RMS Setting
Variable Emphasis Input
Offset Absorption
Variable Emphasis
Offset Absorption
Analog Ground
Timing Current Setting
SDA
SCL
GND(I2Cbus)
R-channel Output L-channel Output
Surround Timing Setting
R-channel Offset
Absorption
R-channel Capacity of
High Frequency Band Width
R-channel Capacity of
Low Frequency
Band Width
L-channel Offset
Absorption
L-channel Capacity of
High Frequency
Band Width
L-channel Capacity of
Low Frequency
Band Width
External R-channel Input 3
External L-channel Input 3
External R-channel Input 1
External R-channel Input 2
External L-channel Input 1
External L-channel Input 2
L-channel Fixed Output
Monaural Offset Absorption
R-channel Fixed Output
IC3401 < MTS Decoder, Audio Control & Switch> UPC1851BCU

-11-
IC802
MEMORY
IC291
SOLDER
SIDE
VIDEO SW
T611
CONVERTER
TRANS.
Q613
POWER. OUT
Q612
POWER.
DRIVE
TELETEXT BOARD
SECAM BOARD
Service Adjustments
(1)Receive PAL cross hatch pattern.
(2)Select ”FUERTE” picture mode with the remote control
IMAGE 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
MAIN BOARD
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 FUERTE picture mode by
pressing the IMAGE button on the 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
minimum 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
Pincushion Adjustment B-Voltage Supply Adjustment

-12-
Service Mode Adjustments
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.
[1] Bus Data Adjustments
Following table shows the initial values which have been stored in the CPU ROM, and items for the service
adjustments.
NO. ITEM INITIAL
VALUE RANGE
OF DATA FUNCTION NO. ITEM INITIAL
VALUE RANGE
OF DATA FUNCTION
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
H-Phase (H-Centering) AdjustmentH-P 08 00-15 V-Position (V-Centering) AdjustmentV-P 02 00-07 V-Size AdjustmentV-S 70 00-127 OSD H-Position AdjustmentOSD 01 00-15 RF AGC Adjustment
AGC 64 00-127 VCO (AFT) Adjustment
VCO 128 00-255 SIF VCO AdjustmentSIF 00 00-03 Self Adjustment Mode Setting
SELF 00 00-15 DL Time Adjustment
DLT 01 00-03 DL Fine AdjustmentDL F 01 00, 01 Black Stretch On/Off SettingB-ST 00 00, 01 ABCLABCL 01 00, 01 ABCL GainAB-G 00 00, 01 Trap Frequency AdjustmentTRAP 03 00-03 White Back SettingWBK 00 00, 01 Blue Back SettingBBK 00 00, 01 AFC Gain AdjustmentAFCG 02 00-02 Red Bias AdjustmentRBI 00 00-255 Green Bias AdjustmentGBI 00 00-255 Blue Bias AdjustmentBBI 00 00-255
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
43
44
VBRI 20 00-63 DVD Colour Adjustment
DCOL 115 00-255 DVD Tint Offset
DTIN 05 -32 - +32 DVD PAL Colour differential value
DPLC 18 -127 - +127 DVD PAL Tint differential value
DPLT 15 -63 - +63 Manufacturing process flag for DVD
DVD-F 00 00-01 1-HDL through flag
HDL-F 00 00-01 MAT switching flag
MAT-F 00 00-01 DVD 1 chip colour adjustment
COFF 00 00-03 BBE MID output adjustment
BBE-M 255 00-255 BBE HIGH level adjustment
BBE-H 00 00-255 Y/C IC emphasis setting
ENH 00 00-01 H-Position of the CAPTION
CAP-H 32 00-63 Contrast adjustment of the CAPTION
V-size deduction under the wide screen mode
V-Size value under the zoom mode
Option setting-1
CAP-C
WVSI
ZVSI
OP1
21
50
13
61
00-63
00-127
00-127
00-63
AV mode brightness under the no signal condition
42 WCON 10 00-127 Contrast deduction under the wide screen mode
45
46 OP2 07 00-255 Option setting-2
R-OSD 15 00-15 OSD H-Position for RECALL
100 R00 FF ROM Correction
101 R01 FF ROM Correction
171 R71 FF ROM Correction
172 R72 FF ROM Correction
21
22
23
24
25
26
Red Drive Adjustment
RD 64 00-127 Blue Drive Adjustment
BD 64 00-127 Drive Adjustment
DRV --Screen Adjustment
1 LINE --Y/C Separation
Y/C 01 00,01
AV mode contrast under the no signal condition
VCON 10 00-63
Service mode adjustments table in CPU ROM
Readjust the following service adjustments.
Adjustments Service Mode No. & Item
Horizontal centre adjustment Item 01, H-P
Vertical centre adjustment Item 02, V-P
Vertical size adjustment Item 03, V-S
OSD position adjustment Item 04, OSD
RF AGC adjustment Item 05, AGC
AFT adjustment Item 06, VCO
Grey scale adjustment Item 18-24
Option setting-1 Item 44
Further adjustment please refer to page 14 and 15.
Notes:
The initial value that the CPU writes down the CPU ROM data to the memory when replaced the memory IC.TV set
may not operate correctly with this initial value. It is required to set up the fine adjustment for service adjustments
described below.

■00010100 ■
ADDRESS DATA
23 DRV R 64 B 64
-13-
Service Mode Adjustments
P▲
P▼
MENU IMAGE
CH
▲
VOLVOL
-
+
[Entering to Bus Data Adjustment Mode]
1. Press and hold the MENU button on the TV set and press the 2 button on the remote control handset. Following
setting items appears on the screen.
To return to normal TV mode, press the MENU button on the TV set or remote control handset.
2. Select item by pressing the CHANNEL DOWN (Item No. UP) or CHANNEL UP (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
1
45
23
6
123
4 5 6
P▲
P▼
CH ▼
-
+
P▼
DISPLAY MUTE
SOUND SURROUND
CH ▼
01➔02➔03➔04➔05......
46➔26➔25➔24➔23......01
Display for [H-P] Horizontal centre adjustment
■00010100 ■
ADDRESS DATA
01 H-P 8
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
-
+
P
MENU
TV/AV

-14-
Service Mode Adjustments
[Bus Data Adjustment]
The microprocessor used in this model is a multi-purpose
type and is used in several different models. To ensure
proper operation and the correct features for your particu-
lar model, Option setting-1 data must be correct.
(1)Select [OP1] in the service mode.
(2)Set Option setting-1 data to 61.
(3)Exit from the service mode.
(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.
(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.
(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.
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 mini-
mum.
(2)Select [AGC] in the service mode.
(3)Change value until the snow noise just disappears.
(4)Exit from the service mode.
(1) Connect DC meter to pin-2 of IC201 and the ground.
(2) Tune the receiver to the clearest station.
(3) Disconnect RF input. (Disconnect antenna plug from
the antenna socket.)
(4)Select same channel. (If you have selected channel 03
in step 2, press “0” button next “3” button on the
remote control to select channel 03.)
(5)Connect antenna plug to the antenna socket.
(6)Select [VCO] in the service mode.
(7) Change value until the voltage (on pin-2 of IC201) to
be 4.5±0.2V at OK point.
(8) Exit from the service mode.
NG OK
4.5V ±0.2V
0255
VCO DATA
Pin-2 of IC201 VOLTAGE
Item 06 [VCO] AFT
Item 05 [AGC] AGC
Item 04 [OSD] OSD POSITION
Item 03 [V-S] VERTICAL SIZE
Item 02 [V-P] VERTICAL CENTRE
Item 01 [H-P] HORIZONTAL CENTRE
Item 44 [OP1] Option setting-1
Horizontal centre
Vertical centre
Vertical size
IC201
IF/VIDEO/CHROMA
IC3801
IF SIGNAL
PROCESSOR
pin-2
(IC201)
MAIN BOARD

-15-
Service Mode Adjustments
VIDEO
MODE AUDIO
MODE POWER
0
7
1
4
8
5
23
6
9
P▲
P▼
RECALL
MENU IMAGE
SLEEP
CH ▲
VOL
DISPLAY MUTE
SOUND SURROUND
CH ▼
VOL
-
+
123
4
7
5
8
0
6
9
(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-18 RBI, 19 GBI, 20 BBI mode to 00. Set each value of Item-21 RD, 22 BD mode to 64.
(5)Select Item-24 mode to be one horizontal scanning line and turn the screen volume on the FBT to obtain just visible
one coloured line.
(6)Press the 1 (Red Bias +), 4 (Red Bias - ), 2 (Green Bias +), 5 (Green Bias - ), 3 (Blue Bias +) or 6 (Blue Bias - )
button to adjust the brightness of each colour until a dim white line produced. Please see the control button alloca-
tions in this mode.
(7)Select Item-23 DRV mode to enter the white balance adjusting mode.
(8)Press the 7 (Red Drive +), RECALL (Red Drive - ), 8 (Blue Drive +) or 0 (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 18-24 GREY SCALE
Red Bias -
Red Bias +
Green Bias -
Blue Bias +
Red Drive +
Blue Drive -
Blue Drive +
Green Bias +
Blue Bias -
Press the MENU
button to exit from
service mode
Red Drive -

Service Mode Adjustments
-16-
P▲
P▼
VOL
CH ▼
VOL
-
+
No. Item Initial value Range
01 INPUT LEVEL 25 00~63
02 STEREO VCO 23 00~63
03 FILTER 32 00~63
04 LOW SEPARATION 29 00~63
05 HIGH SEPARATION 26 00~63
06 SAP VCO 27 00~63
[2] MTS Adjustments
Following table shows the initial values of MTS Adjustment which have been stored in the CPU ROM.
[Entering to MTS Adjustment Service Mode]
1. Press and hold the MENU button on the TV set and press the 3 button on the remote control handset. Following
setting items appears on the screen.
MTS Adjustment Mode
To return to normal TV mode, press the MENU button on the TV set or remote control handset.
2. Select item by pressing the CHANNEL DOWN (Item No. UP) or CHANNEL UP (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.
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
123
123
4 5 6
0
P▲
P▼
MENU IMAGE
CH
▲
VOL
CH ▼
VOL
-
+
-
+
P
MENU
TV/AV

IC3401
MTS DECODER
K34EE
K34DD
Service Mode Adjustments
-17-
1. Input monaural sound signal (400Hz, 25KHz Div.)from the
antenna terminal.
2. Connect a DC Volt-Meter to TPLOW (on the MTS unit)
and the ground.
3. Switch the TV set on.
Press and hold the MENU button on the TV set, and press
“3” button on the remote control transmitter to enter to the
service mode.
SOUND LEVEL ADJUSTMENT
(Service Mode)
4. Adjust voltage to become DC 500mVrms±10mVrms by
pressing the VOLUME(+/-) button on the remote control or
TV set.
5. To exit from the service mode, press the MENU button.
1. Connect a frequency counter to TPLOW(on the MTS unit)
and the ground.
2. Connect JIG-A to K34TP on the MTS unit.
3. Switch the TV set on.
Press and hold the MENU button on the TV set, and press
“3” button on the remote control transmitter to enter the
service mode.
4. Select “STEREO VCO” by pressing the CHANNEL
UP/DOWN button on the remote control or TV set.
STEREO VCO ADJUSTMENT
5. Adjust the frequency to become 15.625KHz ± 0.1KHz by
pressing the VOLUME (+/-) button on the remote control or
TV set.
6.To exit from the service mode, press the MENU button.
(Service Mode)
IC3401
MTS DECODER
K34EE
K34DD
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
TPLOW
TPHIGH
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
K34TP
MTS BOARD
MTS BOARD
[MTS Adjustments]
1M ohm Resistor
(Plug 3P)
Jig-A

Service Mode Adjustments
-18-
6. Adjust voltage to become minimum reading by pressing
the VOLUME(+ -) button on the remote control or TV set.
7.To exit from the service mode, press the MENU button.
1. Connect a signal generator to + side of C3407 and the
ground.
Signal output=15.734KHz, 100mVrms.
2. Connect a DC Volt-Meter to TPHIGH(on the MTS unit) and
the ground.
3. Connect JIG-A to K34TP on the MTS unit.
4. Switch the TV set on.
Press and hold the MENU button on the TV set, and press
“3” button on the remote control transmitter to enter the
service mode.
5. Select “FILTER” by pressing the CHANNEL UP/DOWN
button on the remote control or TV set.
MTS FILTER ADJUSTMENT
IC3401
MTS DECODER
K34EE
K34DD
C3407 K34TP
(Service Mode)
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
MTS BOARD
1. Connect an oscilloscope:
Probe-A to TPLOW (on the MTS unit) and the ground.
Probe-B to TPHIGH (on the MTS unit) and the ground.
2. Switch the TV set on, and receive the multi sound program.
3. Press and hold the MENU button on the TV set, and press
“3” button on the remote control transmitter to enter to the
service mode.
4. Select “LOW SEPARATION” by pressing the CHANNEL
UP/DOWN button on the remote control or TV set.
STEREO SEPARATION ADJUSTMENT
(Service Mode)
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
IC3401
MTS DECODER
K34EE
K34DD
TPLOW
MTS BOARD TPHIGH
1M ohm Resistor
(Plug 3P)
Jig-A

Service Mode Adjustments
-19-
5. Adjust level of 300Hz at TPLOW to become minimum
level by pressing the VOLUME(+/ -) button on the remote
control or TV set.
Minimum leakage
TPLOW
300Hz
6. Select “HI SEPARATION” by pressing the CHANNEL
UP/DOWN button on the remote control or TV set.
7. Adjust level of 4KHz at TPHIGH to become minimum
level by pressing the VOLUME (+/-) button on the
remote control or TV set.
8.To exit from the service mode, press the MENU button.
6. Adjust frequency of the counter to become 78.125KHz
±0.5KHz by pressing the VOLUME (+/-) button on the
remote control or TV set.
7.To exit from the service mode, press the MENU button.
TPHIGH Minimum leakage
4KHz
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
1. Connect a frequency counter to TPLOW and the ground.
2. Connect JIG-A to K34TP on the MTS unit.
3. Switch the TV set on.
4. Press and hold the MENU button on the TV set, and
press “3” button on the remote control transmitter to enter
to the service mode.
5. Select “SAP VCO” by pressing the CHANNEL UP/DOWN
button on the remote control or TV set.
SAP VCO ADJUSTMENT
(Service Mode)
INPUT LEVEL 25
STEREO VCO 23
FILTER 32
LOW SEPARATION 29
HI SEPARATION 26
SAP VCO 27
ADJUST: - /+
CHOOSE: ▲▼
EXIT : MENU
IC3401
MTS DECODER
K34EE
K34DD
MTS BOARD K34TP
1M ohm Resistor
(Plug 3P)
Jig-A
TPLOW

Service Mode Adjustment
-20-
[3] Fine Tuning Service Menu
1. Press and hold the MENU button on the TV set and press the 4 button on the remote control handset to enter to the
service mode.
FINE TUNING - +
To return to normal TV mode, press the MENU button on the TV set or remote control handset. (Or will automatically
return to normal TV mode after 5 seconds.)
This adjustment is used to do a fine tuning of the channels with poor reception after they have been stored by the
automatic tuning.
This function is available for one channel only and the fine-tuned channel is memorized into IC802 (EEPROM).
Fine tuning service mode
Fine tuning data value will be automatically stored in memory.
0
7
4
8
56
9
RECALL SLEEP
4
7
5
8
0
6
9
-
+
P
MENU
TV/AV
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 24 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 15 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 theTV 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
P▲
P▼
MENU IMAGE
CH
▲
VOL
CH ▼
VOL
-
+
2. Press and hold the VOLUME + or VOLUME - button on the remote control handset or TV set to make fine tuning
adjustment. Press and hold the VOLUME + button for higher frequency tuning, and press and hold the VOLUME -
or lower frequency tuning.