Sanyo FA1-A, C29LF34 Service 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 . . 75W Ext.Terminals

Video inputs: Phono jack 5 2 (1.0Vp-p, impedance 75W)

S-Video Input 5 1 (Din 4 pin, Separate Y/C Signals Input)

DVD Input:Component Video Jack-Y 5 1 (1.0Vp-p, impedance 75W)

Component Video Jack CB/CR 5 1 (0.7Vp-p, impedance 75W) Audio inputs:Phono jack (R/L) 5 3 (436mVrms, impedance more than 40KW) Video monitor outputs: Phono jack 5 1 (1.0Vp-p, 75W) Audio monitor outputs: Phono jack(R/L) 5 1(436mVrms, Impedance less than

600W)

Headphone jack: Mini Stereo jack 5 1

Speakers ......... 5cm 5 12cm 5 4

Sound Output . . . . . . . . . 7.5W + 7.5W

Dimensions . . . . . . . . . . 750(W) 5 582.5(H) 5 503(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 sho wn 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.

VIDEO MODE

AUDIO MODE

POWER

0

7

1 4

8

5

2

3 6 9

P▲

P▼

RECALL

MENU

IMAGE

SLEEP

CH

▲

VOL

DISPLAY

MUTE

SOUND

SURROUND

JXMGY

CH

▼

VOL

-

+

123 475

8 0

6 9

REFERENCE NO.SM5110146

Original Ver sion

Contents

-2-

Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Service Mode Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-21

Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Purity and Convergence Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 22-23

Mechanical Disassembles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Chassis Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-42

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 primar y 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 v oltage 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 f ollow 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 par ts 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

C

Y

CLK

IIC Bus

IF

OUT

Y/COMP.

C-IN

R-Y

B-Y

IC801

CPU

IC802

MEMORY

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

BACK TERMINAL

UNIT

26

7

25

38

39

2

5

7

10

23

1

13

11

L-OUT

R-OUT

17

8

7

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.

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

7

36

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

Y

VELOCITY

CIRCUIT

SVM Coil

From

IC302 pin-7

140V

TO V elocity Circuit

4

2

Q432

H-OUT

DY

VERT. DY

T471

FBT

FOCUS

SCREEN

HORIZ. DY

PINCUSHION

CIRCUIT

(Q461,Q462)

8/9

32/34

31/33 5/6

9

11

COLOR

IC7905

DAC

From

IC801(CPU)

4

3

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

DVD Y -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

4012

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

IF AGC 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

COLOUR APC

AF AMP

4.5/6.0

SIF IO ADJ

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

1H DL

VCXO

ACC

DET

F/F

2ND AMP

CHROMA

BPF

1ST AMP

(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

SELF ADJ.

CLAMP

50/60 OUT

R

TINT

B

R

DRIVE

B

G

ABCL

ID CUT

BLUEBACK

WHITE

BACK

COLOR

CONTRAST

SERVICE

BRIGHT

STATION DET

STATION

SYSTEM SET

SYSTEM

IF AGC

DELAY ADJ

DEFEAT

DL TIME

DL FINE

VIDEO VCC

VIDEO GND

DEFLECTION GND

TRAP

SW

D.TRAP

F.TRAP

BLACK STRECH OFF

F AGC

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

EXIT AUDIO IN

GND

VCC

VIF SIF

SIF IN

47

48

46

1

8

3

42

52

51

50

49

5

4672 931

38

36

34

39

V-OUT

V-FB

V RAMP

BLK

AUDIO DIRECT OUT

AF DC FB

HI VCC

IF OUT

IF APC

IF VCO

BLACK PEAK

ACL/CLK

Y-SW OUT

X TAL 4.43

X TAL 3.58

BLACK PEAK

QXXAVB629

-6-

IC501 < Ver tical Output > LA7841

THERMAL PROTECTION

PUMP UP

AMP

-

+

GND

Ver. Output

Output

Stage Vcc

Non Inv. Input

Inverting

Input

Vcc

Pump Up

Output

LA7841

1

2

34

5

6

7

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

PEDESTAL CLIP

CORING

CHROMA KILLER

+

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

2

3

Delay

T1

T2

Gate

Common

4

5

1

STR81145A

r1

r2 r3

Z1

Q1

Z2

Q3

Q2

Triac

IC1601 < Double Rectifier > STR81145A

8

7

6

5

4

3

2

1

BIAS

BUFFER

GND Vout V

+

Vin3

CTL2

Vin2

CTL1

Vin1

CONTROL INPUT - OUTPUT SIGNAL

CTL1

CTL2

OUTPUT SIGNAL

L

Vin1

H

L

Vin2

L/H

H

Vin3

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

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

30

GND

I2C LOGIC

28

21

12

6

24

R

OUT2ROUT2

S1 S2

ADDRESS Mute

-6dB

6dB

32

R

OUT1

3322L

OUT1

L

OUT2

-6dB

31

37 29 39

C

OUT1

CIN1

Y

OUT1

V

OUT2

23

Y

IN1

34

V

OUT1

6dB

38

V

cc

6dB

-6dB

COMB

IC3501 < 3D Surround Processor > MM1369

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-

8

7

BUFFER

6

5

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

3

4 5

6

7

LEVEL

CONVERT

Power

On

Reset

I2C

BUS SDA

SCL

V

CC

REG

LEVEL

CONVERT

LATCH

SAD2

SAD1 SAD0

SLAVE ADDRESS SELECT

SW0~3

SW IN/OUTPUT

LEVEL

CONVERT

I2C DECODER

LATCH

DAC

AMP

DAC4 DAC3

DAC2

DAC1 DAC0

LATCH

DAC

AMP

VCC

GND

DAC OUTPUT

-10-

IC Block Diagrams

7

12

8

9

10

11

15

18 14

13 17 16 20

Noise BPF

Noise

Detector

I

2

C Bus

Interface

SAP Demodulation Block

Composite

Signal Input

2.2µF

0.1µF

0.047µF

SAP Signal

Detector

SAP Offset

Absorption

0.47µF

0.1 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

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

I

2

C 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(

I

2

C bus)

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 patter n. (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 VOLT A GE 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 necessar y ser vice adjustments are carr ied 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 ROM Correction Item 100-172

Further adjustment please refer to page 14 to 16.

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 retur n to nor mal 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 4

5

2

3

6

1

2

3

456

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 particular 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

0

255

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