Chassis Block Diagrams

-3-

V1 L1 R1

V2 L2 R2

FV

3F

L3F

R3

Vo Lo Ro

AV

1

AV

2

Fron

tA

V2

AV

Out

IC20

1IF

/Vid

eo/C

hro

ma

<QX

XA

VB

241M

>

TE

LE

TE

XT

BO

AR

D

IC80

1C

PU

Tun

er

IC50

1V-

OU

T<L

A78

41>

Q43

2H

-OU

T

Q43

1H

-DR

IVE

Pcc

Circ

uit

Q46

1-Q

462

PIC

TU

RE

TU

BE

Q72

1

Q70

1Q71

1

Vid

eo O

utp

ut

H.V

T47

1 F

BT DY

C51

5R

518

X16

1S

AW

Filt

er

IC12

00A

V S

W.

<LA

7016

>

IC12

01A

V S

W.

<TC

4052

BP

>

IC35

013D

SU

RR

OU

ND

<MM

1369

AD

>

IC19

20A

UD

IO C

ON

TR

OL

<TD

A84

24>

IC00

1A

UD

IO O

UT

<LA

4270

>

6 7 3 52 36 48 34242112383920191827232830

R G B

BLK

RG

BB

LK

42

4 7 2

3 13

109

23 1 610

11131 3

9132 5

710

3

L R

L R

L R

L R

3 S

tere

oA

V1/

AV

2T

V/A

V3D

Sur

roun

dI2 C

Bus

I2 C B

us

I2 C B

us

Mut

e

Spe

aker

s

Hea

dpho

nes

Vid

eoou

t

5.5M

Hz

Aer

ial

IF

Band SW

Tu

SIF

-in

Vid

eoin

t

Ext

.V

-fee

dbac

k

V-d

rive

H-d

rive

Vid

eo-o

ut

Syn

c-in

R-o

ut

G-o

ut

B-o

ut

From

: CP

U

AV

SC

ircui

t

Q65

3

Q65

2

IC65

1

Q68

4

Q68

3

5V 12V

9V 25V

140V

24V

PO

WE

R S

UP

PLY

CIR

CU

IT

1/5

2/15

4/11

L/R

L/R

L/R

V-o

ut

5.5/

6.5M

Hz

X38

01 S

AW

Filt

er

65 1

17 248 7 1314

X38

02

IF

IF

IC38

01S

EC

ON

D S

IF D

EC

OD

ER

<LA

7577

N>

5.742MHz

Audi

o ou

t

2nd

Sou

nd

1st S

ound

IC3401STEREO/DUAL SOUND PROCESSOR

<TDA9840/V2>

12/1

4

L-O

UT

L R

R-O

UT

10 3

21

6

Mut

eQ

002IC

1401

PR

E-A

MP.

<NJM

4558

L>

IC14

02P

-AM

P.<L

A42

70>

SU

PE

R W

OO

FE

R

16 7

15 8

IC34

51 N

ICA

M D

EC

OD

ER

MAIN SIGNAL PROCESSING CIRCUIT

Following diagrams show the fundamental block diagrams for AC2 chassis and there-fore differ slightly from actual diagram of each TV set.

<Q

XX

AV

B48

8>

-4-

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21222324252627282930313233343536373839404142

H-S

YN

C

V-S

YN

C

BA

ND

A

BA

ND

B

SO

UN

D M

UT

E

ON

-TIM

ER

LE

D

TV

(L)/

AV

(H

)

AV

1(L)

/AV

2(H

)

SIF

4.5

M S

W

SIF

5.5

M S

W

SIF

6.5

M S

W

WO

OF

ER

ON

/OF

F

3D S

UR

RO

UN

D O

N/O

FF

3D S

TE

RE

O O

N/O

FF

PO

WE

R O

N(H

)/O

FF

(L)

OP

TIO

N S

W (

PO

SIT

ION

)

GN

D

OS

C8M

GN

D

R G B

BLK

3.58

M S

W

50/6

0Hz

SW

AC

K

STA

TU

S

SC

L

EE

PR

OM

CLO

CK

SD

A

EE

PR

OM

DAT

A

AF

T-S

AD

J IN

OP

TIO

N S

WC

OLO

UR

SW

RE

SE

T

PR

OT

EC

T

RC

IN

Vcc

5V

IC201If/Video/chroma

2 41IC

801

CP

U

Tuni

ng

Tune

rQ

836

Q83

7

key

switc

hes

&op

tion

sw.

H V

RC

Pre

-Am

p

SYSTEM CONTROL

IC Block Diagrams

-5-

IC201 < IF/Video/Chroma/Def. > QXXAVB488

VIF INIF AGC OUT AFT

TV IN

EXT IN

AUDIOPOWER

33

29

35

26

37

40

32

13

44

43

11

15

16

12

2725242122412819201830239101445

QX

XA

VB

241

AF A

MP

AF A

MP

4.5/

6.0

SIF

IO A

DJ

BUS

I/F

FM DET

LIM

ITTE

R

B EX

ITIN

PUT

R E

XIT

INPU

T

G E

XIT

INPU

T

V SY

NC

TRIG

SYN

CSE

P.

SYST

EMID

EQ ELIM

INAT

E

BGP

GEN

E.PH

ASE

CO

NT

KILL

ERD

ET

LOC

KD

ET

ID DET

CH

RO

MA

APC

DET

PAL

SW

SEC

AMFF SE

LFAD

J

V.R

AMP

AFC

AFC

1H D

LVC

XO

ACC

DET

F/F

2ND

AM

P

CH

RO

MA

BPF

1ST

AMP

(AC

C)

HPF

AFT

AFT

OU

TVI

DEO M

UTE

H S

TOP

H.P

HAS

E

AUD

IO M

UTE

SW

SDA

SCL

FAST

BLK

B IN

R IN BR G G

SEC

AM R

EF

SEC

AM R

EF

V.SI

ZESE

RVI

CE

SW

MUTEOUT

SELF

AD

J.

CLA

MP

50/6

0 O

UT

R

TIN

T

BRDR

IVE B

G

ABC

LAB

CL

ID C

UT

BLU

EBAC

KW

HIT

E BA

CK C

OLO

RC

ON

TRAS

T

SER

VIC

EBR

IGH

T

STAT

ION

DET

STAT

ION

SYST

EM S

ET

SYST

EM

IF A

GC

DEL

AY A

DJ

DEF

EAT

DL

TIM

E

DL

FIN

E

VIDEOVCC

CHROMAGND

DEFLECTIONGND

TRAP

SWD

.TR

AP

F.TR

AP

BLAC

K ST

REC

H O

FF

F AG

C

VID

EOD

ETVI

FAM

P

APC

DET

ADJ

DET

BLAC

KST

REC

H

VID

EOTO

NE

CH

RO

MA

TRAP

VID

EOM

UTE

CLA

MP

SHAR

PNES

S

CO

NTR

AST

DEL

AY

FEF

FILT

ER

AGC

R-Y IN

B-Y IN

H OUTPUT

SYST

EMD

ECO

DE

BRIG

HT

CH

RO

MA

DEM

OD

ULA

TOR

DR

/VE

AMP

AFC

GAI

N

RG

B M

ATR

IXC

ON

TRAS

T

32 F

HVC

O

MU

TED

ET

HV

BLK

VER

TIC

ALC

OU

NTD

OW

N

HO

RIZ

ON

TAL

CO

UN

TDO

WN

EXIT AUDIOIN

GND

VCC

VIFSIF

VCC

47

48

46

1

8

3

42

52

51

50

49

5

4 6 7 2 9 31 38

36

34

39

QX

XA

VB

488

-6-

IC501 < Vertical Output > LA7841

THERMALPROTECTION

PUMPUP

AMP

-

+G

ND

Ver

. Out

put

Out

put

Sta

ge V

cc

Non

Inv.

Inpu

t

Inve

rtin

gIn

put V

cc

Pum

p U

pO

utpu

t

LA7841

1 2 3 4 5 6 7

IC001 < Sound Output > LA4270

CH1

CH2

ThermalShutdownOverVoltage

RippleFilter

30K

300

30K

300

Vcc

-

+

+

-

Fee

dbac

k 1

Inpu

t 1

Rip

ple

filte

r

Inpu

t sid

eea

rth In

put 2

Fee

dbac

k 2

Out

put 2

Out

put s

ide

eart

h

Pow

er s

uppl

y

Out

put 1

LA4270

IC3801 <SIF Demodulator> LA7577N

LIMAMP

AGC EQ AMPB/W

N.S.C. VIDEOAMP

APCTIME CONSTSW

VCO

FMDET.

MIX VIDEO DET.

IFAMP

PREAMP

RF AGC AMP AFT

LOCKDET.

IF AGC

APCDET.

LA7577N

24 23 22 21 20 19 18 17 16 15 14 13

1 2 3 4 5 6 7 8 9 10 11 12

-7-

IC3501 < 3D Surround Processor > MM1369BD

SIMULATEDSTEREO

SIMULATEDSTEREO

VIRTUAL AUDIO

QXPANDER PROCESSOR

gm

24 23 22 21 20 19 18 17 16 15 14 13

1 2 3 4 5 6 7 8 9 10 11 12

Vcc Lin Gl1 Gl2 Gl3 Gl4 Fc Qf1 Qf2 Qf3 Qf4 Lout

Rin Gr1 Gr2 Gr3 Gr4 M/g Ref SPC Qi S/Q Rout Gnd

MM1369AD

IC1920 < Sound Controller > TDA8424

MO

DE

SE

LEC

TO

R

stereo/spatial

mono

spatial

stereo/mono

spatial

stereo/mono

stereo/spatial

POWERSUPPLY

treble L treble Rbass Rbass L

treblebassvolu

me

bala

nce

IIC BUS

D.GNDSCLSDAVcc GND

Vcap

L-IN

R-IN mono

L-OUT

R-OUT

8146 716 15

13

9

101211254

1

3

TDA8424

-8-

SC

LVO

1

VO

2

VO

3

VO

4

500

mV

RM

S14

500

mV

RM

S13

500

mV

RM

S12

500

mV

RM

S11

MA

IN

SC

AR

T

6 dB

6 dB

6 dB

6 dB

Vi4

Vi4

Vi3

+

2.2µ

F

+

2.2µ

F

109

25 kΩ

25 kΩ

25 kΩ

25 kΩ

mut

e

CD

2C

D1

10nF

±5%

10nF

±5%

5 kΩ

L/A

/MO

NO

250

mV

RM

S

500

mV

RM

S

0 to

-0.

4 dB

A/M

ON

O

+ - -

L

10 kΩ

5 kΩ

R/B

250

mV

RM

S

1715

10 kΩ

+ +-

0 to

4.5

dB

-2 d

B

40 kΩ

40 kΩ

-2 d

B

10 kΩ

10 kΩ

0 to

4.5

dB

7 8

250

mV

RM

S(f

rom

1st

SC

)

2.2µ

F

+

Vi1

2L+R

, A

250

mV

RM

S(f

rom

2nd

SC

)V

i2

R, B

+

2.2µ

F

30 kΩ

47 p

F

Vip

il5 4 2 3

2.5

mH

Q0=

70

ster

eole

vel

3.3

nF

CD

CL

CA

GC

CLP

10 µ

F

10 µ

F

100

nF

LEV

EL

AN

DS

TE

RE

O

AD

JUS

TM

EN

T

TD

A98

40

25 kΩ

25 kΩ

DIG

ITA

LP

LL

OS

CIL

LATO

R

DIG

ITA

L P

LLA

ND

D

EM

OD

ULA

TOR

DIG

ITA

L P

LLA

ND

D

EM

OD

ULA

TOR

GE

NE

RAT

ION

OF

R

EF

ER

EN

CE

VO

LTA

GE

S

DIG

ITA

LIN

TE

GR

ATO

R

DIG

ITA

LIN

TE

GR

ATO

R

PO

WE

R-O

N

RE

SE

T

I2 C-B

AS

CO

NT

RO

L

CO

NT

RO

L LO

GIC

DU

AL

bit

20 1

SC

L

SD

A

ST

ER

EO

bit

Vre

f

1618

6

Vp

GN

D1/

2 V

p

+

Cre

f

100µ

F/

15V

19

XTA

L

10 M

Hz

Inpu

t and

out

put l

evel

s ar

e no

min

al v

alue

s.T

hey

are

rela

ted

to th

e S

CA

RT

nor

m.

(AM

: m=

0.54

, FM

: ∆f=

±27

kHz)

.

Blo

ck d

iagr

am o

f the

bip

olar

TV

/VT

R-s

tere

o de

code

r.

tanδ

≤ 0.

002

+

IC3401 <Stereo/Dual Sound Processor> TDA9840/V2

-9-

IC3451 < NICAM Decoder > SAA7283ZPM2

QU

ADR

ATU

RE

MIX

ERS,

BAS

EBAN

D F

ILTE

RS

AN

D A

GC

GAI

N S

TAG

E

CO

SIN

ESI

NE

CAR

RIE

R L

OO

PPH

ASE

DET

ECTO

RAN

D D

ATA

SLIC

ERS

CAR

RIE

R L

OO

PQ

UAD

RAT

UR

E VC

OBI

T R

ATE

CLO

CK

REC

OVE

RY

AGC

CO

NTR

OLL

ER

NIC

AM 7

28 D

ECO

DER

AN

DD

EVIC

E C

ON

TRO

LLER

XTAL

OSC IIC DAI

DIG

ITAL

FIL

TER

, GAI

N,

DE-

EMPH

ASIS

NO

ISE

SHAP

ER(L

EFT

CH

ANN

EL)

BITS

TREA

M D

AC(L

EFT

CH

ANN

EL)

OU

TPU

T SW

ITC

HES

AND

BU

FFER

(LEF

T C

HAN

NEL

)

NO

ISE

SHAP

ER(R

IGH

T C

HAN

NEL

)

BITS

TREA

M D

AC9R

IGH

T C

HAN

NEL

)

OU

TPU

T SW

ITC

HES

AND

BU

FFER

(RIG

HT

CH

ANN

EL)

26 24 30 31 36 37 21 20 34 33 35 39 48 43 40 41 42 50 49 51 2 46 44 12 16 17 3 4 11 5

15

8

6719181524738452527322223

28

29

MIXREF

DQPSK

VDD

F1

VSSF

1

CO

FF

CEY

EVD

DF2

VSSF

2R

EMO

REM

VEIR

EFVR

OF

VRC

FC

LKLP

FD

ATAO

UT

DAT

AIN

XTAL

OSC

VSSX SD

ASC

LAD

SEL

DO

BIA

VDD

D

VSSD

VSSD

AC

EXTL

EXTL

VDD

AVS

SAVR

OA

VRC

A

SOFF

SEYE

PKD

ET

VCO

NT

VCLK

PCLK

TEST

RES

ETPO

RT2

M

UTE

POR

MPO

RA

EXT-

LEX

T-R

OP-R

OP-L

REPRESENTS CONTROLLER BUS

SAA7283ZP

-10-

Service Adjustments Location

SW601POWERSWITCH

KGL602

PS601

KE

KA

A1901RC PRE-AMP.

D1901 SW1901

SW

1902

Q1902

SW1903 SW1904

C651

Q682

IC651

PROG.+ PROG.- VOL.+ VOL-

Q685Q684

Q686

IC631Q652

Q1901

C804

C656

C652 C654

C653

C685

C644 Q653

C655

F601

TP-EE

R602

L603

Q611

R621

Q612

Q613POWER

SWITCHING

KHC607

Y13 Y12

Q461

Q462

VR

462

C463

C462

C468

R435

C467

T471F.B.T

C471C469

KSC

KQ

C486

L462

C423

C465

C424

C425

C420

C441

C442

L441

L442

Y07

L461

KDY

Q432HORIZ.

OUTPUT

Q527

C527

TP-B

C464

T611CONVERTER

TRANS.

D615

Y14JW17

R645 C645

Q683

C643

C641

C540

JW14

C515

C482

C521

C517

Q431 C514

C434

T431

TP

-AC

K

TP

-ST

S

TP

-SC

L

TP

-SD

T

TP

-GN

D

JW1JW3

JW2KY

JW16

IC501VERT.DEF.

Q540

KCC297

TP-G

TP-V

VR830

Q830

Q831 C830

C835

AU

DIO

IN

PU

T JA

CK

(L)@

SW

1905 SW1906

C829

IC801 CPU

Q813

X801 JW28

IC802MEMORY

C828

Q837Q836

Q824

Q360

C351C354

C355

C361C201

C225

KP

JW13

JW12

Q251

X213

X211

C243

C241

L171C206

X361

KCD

KZ

IC202

C122

IC201IF/COLOR DEF.

KSAKSB

Q171

C251

Q190

Q183

Q261

X182

X183KCA

X131Q131 Q135

Q133X133

JW23

KNB KNA

JW21

KZZ

JW24REAR TERMINAL UNIT

KWJW22

A101TUNER TP-A

C102

JW4

JW6

L102

TP-E

C106

KKQ101

Q102Q140

Q137

JW9

C138C172

C177

Q138

X161

JW11

KJ

KLA

KL

C1198

KR

KB

KFC1197

HEADPHONEJACK

K1111

SW

1907

FU

NC

TIO

N

PR

ES

ET

TV

/AV

Selector

VID

EO

IN

PU

T JA

CK

AU

DIO

INP

UT

JA

CK

(R)

JW18

JW27

C809

MAIN BOARD

(F2EA)

NTSC UNIT

SECAM UNIT

TE

LE

TE

XT

UN

IT

SO

UN

D U

NIT

+B POWER SUPPLY CHECKFOCUS ADJ.

SCREEN VR

HORIZONTAL WIDTH ADJ.

NIC

AM

/ A2 U

NIT

This TV set has a built-in power supply protection circuit.It is provided to protect the TV set in case of a power supply circuit malfunctions. When something abnormalityoccurs during TV reception, the TV set goes to the stand-by mode.

When an abnormality occurs during TV reception, it causes pin 24 of the CPU to go continually Low(less than0.75V) for about one second. The CPU detects that this has occurred and outputs the signal from pin 15 toswitch off the power supply lines.

Releasing the protective circuit and restoring power supply

To release the protective circuit and restore power supply, turn the power to the TV set OFF and then ON againvia either the main power switch or the ON-OFF button on the remote control. This will work only if the powersupply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot berestored and the circuit will have to be repaired.

Protection Circuit

Service Adjustments with Replacing Memory IC(IC802)

-11-

Note: The CPU (IC801) and memory IC (IC802) store the service adjustments data and controls data for each circuit.When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain thebest performance. The necessary service adjustments are carried out by using the RC handset. Please setup the TV set with following steps [1] to [3].

[1] Initializing Procedure1. Put a new memory IC.2. Turn on the TV set.3. Press and hold the [TV/AV] button on the TV set more than 2 seconds. The following picture appears on the screen.

4. Press the [FUNCTION] button on the TV set while the above On-Screen Display is still on the screen. The followingpicture appears on the screen.

This completes the initialization of memory IC.

Following shows the initialized contents of memory data by this procedure.- Plug & play : No executed- Inhibit data : Cancelled- Ch skip data : Cancelled- Set volume control value to 10/63 steps.- Set all of control values in PERSONAL mode to initial value shown in below table.

1AUTO

CLR

AV

Controls PERSONAL DYNAMIC NATURAL SOFT GAME

COLOUR 31/63 35/63 31/63 31/63 23/63BRIGHTNESS 31/63 33/63 31/63 34/63 26/63CONTRAST 55/63 63/63 55/63 26/63 55/63TINT 31/63 31/63 31/63 31/63 31/63SHARPNESS 31/63 48/63 31/63 24/63 10/63

Note: When the memory IC replaced, the CPU writes the controls initial value to the replacedmemory IC as shown in below table.

-12-

[2] Required Service AdjustmentsReadjust the following service adjustments.

Adjustments Service Mode No. & ItemHorizontal centre adjustment Item 01, H-PVertical centre adjustment Item 02, V-PVertical size adjustment Item 03, V-SOSD position adjustment Item 04, OSDRF AGC adjustment Item 05, AGCAFT adjustment Item 06, VCOSIF adjustment Item 07, SIFGrey scale adjustment Item 18-24

Further adjustment please refer to “Service adjustment-1” on page 14-15.

Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjust-ments.

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 adjustmentsdescribed in the above.

No. Item Initial value Range Description

01 H-P 8 0~15 Horizontal centre adjustment02 V-P 4 0~7 Vertical centre adjustment03 V-S 80 0~127 Vertical size adjustment04 OSD 1 0~15 OSD position adjustment05 AGC 64 0~127 RF AGC adjustment06 VCO 128 0~255 VCO (AFT) adjustment07 SIF 0 0~3 SIF VCO adjustment08 SELF 0 0~15 SELF-adjusting 09 DLT 2 0~3 DL-time adjustment10 DLF 0 0, 1 DL-fine adjustment11 B-ST 0 0, 1 Black stretch on/off setting12 ABCL 1 0, 1 ABCL adjustment13 AB-G 0 0, 1 ABCL gain adjustment14 TRAP 3 0~3 Trap frequency adjustment15 WBK 0 0, 1 White back setting16 BBK 0 0, 1 Blue back setting17 AFCG 2 0~2 AFC gain adjustment18 RBI 0 0~255 Red bias adjustment19 GBI 0 0~255 Green bias adjustment20 BBI 0 0~255 Blue bias adjustment21 RD 64 0~127 Red drive adjustment22 BD 64 0~127 Blue drive adjustment23 DRV -- -- White balance adjustment24 -- -- -- Y-cut setting

Service mode adjustments table in CPU ROM

Grey scale adjustment

-13-

[Entering to Service Mode]1. Press and hold the [FUNCTION] button on the TV set and press the [1] button on the remote control handset.

Following setting setting items appears on the screen.

2. Select item by pressing the [OFF TIMER] or [MUTE] button on the remote control handset.3. Adjust value by pressing the [VOLUME +] or [VOLUME - ] button on the remote control handset.

To return to normal TV mode, press the [FUNCTION] button on the TV set or on the remote control handset.

[3] Special Function Setting1. Following items should be set up in the special function mode, please refer to “Special Functions” on page 15 for

actual setting up.

- Volume Lock : OFF- Tuning Lock : OFF- AV Start : OFF- Blue Back : OFF- Music Mode : OFF

2. Confirm following system setting by pressing [RECALL] button on the remote control handset.

- Colour system : AUTO- SIF system : S-1

*Note: There may be not available the above function depending on the specification of TV set.

0010010

05 AGC 63

Item No. Item

Read Status

Data value

0010010

23 DRV R 64 B 64

Item No. Item

Read Status

Data value for Red

Data value for Blue

Display for [DRV] White balance adjustment

Display for [AGC] AGC adjustment

-14-

Service Mode Adjustments

(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 normal.(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 normal.(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 contrastcontrols to maximum. Set the colour control to mini-mum.

(2) Select [AGC] in the service mode.(3) Change value until the snow noise just disappears.(4) Exit from the service mode.

(1) Input the SG signal to collector of Q101.SG signal frequency : 38.9MHzSG signal level : 70 dB

(2) connect a short clip between the base of Q101 andground.

(3) Connect oscilloscope to pin 2 of IC201.(4) Select [VCO] in the service mode.(5) Change value until the voltage to be 4.5 ± 1.0V.(6) Exit from the service mode.

(1) Tune the receiver to the clearest station with SystemB/G(5.5MHz) in your area.

(2) Connect DC voltmeter to pin 46 of IC201 and ground.(2) Select [SIF] in the service mode.(3) Change value until the voltage to be about 3.0 V.(4) Exit from the service mode.

Item 07 [SIF] SIF

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

Horizontal centre

Vertical centre

Vertical size

ADJUSTMENT-1Following adjustments should be carried out when the memory IC is replaced. How to enter the service mode andadjust values, please refer to “ Entering to Service mode” on page 13.

-15-

(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 [RBI], [GBI], [BBI] mode to 0. Set each

value of [RD], [BD] mode to 64.(5) Select next of [DRV] mode to be one horizontal scan-

ning line and turn the screen volume on the FBT toobtain just visible one coloured line.

(6) Press the [1], [2], [5], [6], [9] or [0] button to adjust thebrightness of each colour until a dim white line pro-duced. Please see the control button allocations in thismode.

(7) Select [DRV] mode to enter the white balance adjustingmode.

(8) Press the [3], [4], [-/--] or [RECALL] button alternate-ly 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

i

Y ?

X

TXT/TV

0

7

1

4

8

5

2 3

6

9

BASS

JXMKM

PIC MODE

SWAP

F

-/--

P P

TV/

A•B

CH SCAN

TIMER

SURROUND

P

SYSTEM

(1) Connect DC meter to TP-B and the ground.(2) Set the brightness and contrast to normal.

Tune the receiver to an active channel and synchro-nized picture.

(3) The B-voltage must be 140 ± 1 volt DC.

(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 pic-

ture tube.(4) The high voltage must be 29KV ± 1KV and less than

32KV at 0 beam current.

NOTE:If the picture tube is replaced, check the high voltage.The horiz. width adjustment affects the high voltage.Therefore, re-check the high voltage.

(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Adjust VR462 for optimum horizontal width.

HORIZONTAL WIDTH

HIGH VOLTAGE CHECK

B-VOLTAGE SUPPLY CHECK

ADJUSTMENT-2Following adjustments are not required to readjust when replacing the memory IC.

Red Bias -

Red Bias +

Green Bias -

Green Bias +

Blue Bias -

Blue Bias +

Press [F] button to exitfrom service mode

Red Drive -

Red Drive +

Blue Drive -

Blue Drive +

Stereo Adjustments

-16-

X3401JWW1

C3421

C3401

T3401

C3408

C3405

C3409

JWW2

C3452

X3451

C3459

JWW3

K34ZZ

C3488

Q3484Q3482

IC3451NICAM

JWW4

Q3803

Q3804

T3802

C3805

X3802

IC3801SECOND

SIF DECODER

C3498X3801

T3801

Q3802

Q3801

K34Z

IC3453

JWW6

JWW9C3478

X3461

C3494

C3462

C3813

JWW5

JWW11

(F2DV)

A2/NICAM STEREO BOARD (Adjustment Location)

IC3401STEREO/DUALSOUND PROCESSOR

TPJ3804

Pin13

Pin17

Pin 6

Pin 8

TPJ3405PILOT ALIGNMENT

SIF ALIGNMENT

FM DETECTOR ADJ.

Setting

DC 12VAGC voltage (DC5V-6V)Output probe

Input probe Sweep ATTMarker Frequency

K34Z-pin 6IC3801-pin 13K34Z-pin8(side a)IC3801-pin 1712dB38.9 MHz

1. Adjust AGC voltage to be “A”=0.05 - 0.07Vp-p.

2. By using T3802, adjust “P”to be on the top of waveform.

Adjustment Waveform

P

A

0V

(38.9 MHz)

Tools

10KΩ

0.002µ a

b1KΩ75Ω

GNDGND

Input probe Output probe

(1) Receive a stereo broadcast.(2) Connect oscilloscope to TPJ3804.(3) By using T3801 DC voltage to be 4.0V.

4.0Vp-p

0V

SIF Alignment

FM Detector Adjustment

-17-

Pilot Alignment

Setting

Oscilloscope

Input sound signal sourceTV systemDeviationMode

TPJ3405(IC3401-Pin5)

System B/G27kHzStereo

By using T3401, adjust amplitude to be maximum.

Adjustment Waveform

A

Stereo Separation Adjustment

Separation-1

Setting

Oscilloscope

Input sound signal sourceTV systemDeviationModeModulation

Audio Monitor Out-Right Jack(K12RC3) on theBack unit.

System B/G27kHzStereoRight 1kHzLeft None

(1) Press and hold the FUNCTIONkey on the TV set, and pressthe “4” key on the Remote Control Transmitter to enter toK1 service mode.

Adjustment Waveform

A

(2)Adjust “A” to be 1.4Vp-p±0.25Vusing the LEVEL UP or DOWNkey on the Remote ControlTransmitter.

ADJUST DATA

K1 -002

Separation-2

Setting

Oscilloscope

Input sound signal sourceTV systemDeviationModeModulation

Audio MonitorOut-Left Jack(K12RC3) on theBack unit.

System B/G27kHzStereoRight 400HzLeft None

(1) Press and hold the FUNCTIONkey on the TV set, and pressthe “4” key on the Remote Control Transmitter to enter toK1 service mode.

(2) Select K2 mode, by pressingthe FUNCTION key. (RC or TV)

Adjustment Waveform

B

K1 Service Mode

To exit from the service mode, press the RECALL button.

ADJUST DATA

K2 -011

K2 Service Mode

(3) Adjust “B” to be minimum using LEVEL UP or DOWN key on the Remoto Control Transmitter.

-18-

Purity and Convergence Adjustment

RED

BLUE

Adjust tabs together tosuperimpose red andblue horizontal line.

Figure- 2 BLUE AND RED LINE MOVEMENT Figure- 3 BLUE/RED AND GREEN MOVEMENT

Adjust tabs together tosuperimpose red/blueand green horizontalline.

Adjust tabs angle to superimposeblue and red vertical line.

Adjust tabs angle to superimposered/blue and green vertical line.

GREEN

BLUE / RED

CAUTION: 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:

PURITY ADJUSTMENT1. Demagnetize the picture tube and receiver using an external

degaussing coil. When replacing picture tube or deflectionyoke, mount deflection yoke and purity-convergence magnetsassembly 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 Redand Blue Bias controls fully counterclockwise. Slowly rotateGreen Bias control clockwise to produce Green raster.

3. Loosen the screw holding the Deflection Yoke and remove the3 Rubber Wedges, and slide the Deflection Yoke fully forward.

4. Rotate and spread the Tabs of the two Purity Magnets to cen-tre the vertical green belt in the picture screen. The PurityMagnets are also adjusted to obtain vertical centring of theraster.

5. Slowly slide the Deflection Yoke backward until a uniformgreen 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 arepure.

7. Adjust each Bias control and screen control to obtain whiteraster. Refer to Gray Scale Adjustment. If part of the picturescreen is coloured, adjust the Deflection Yoke position forwardor backward slightly.

8. Tighten the mounting screw of the Deflection Yoke. AdjustConvergence next.

CENTRE CONVERGENCE ADJUSTMENT1. 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, andsuperimpose the Red and Blue vertical lines in the centre areaof the picture screen. Refer to figure 2.

3. Keeping the mutual angle of the Tabs of the Four Pole Magnetturn them together to superimpose the Blue and Red horizon-tal lines in the centre area of the picture screen. Refer to fig-ure 2.

4. Turn Green gun on and adjust Six Pole Magnet 3 and 4 thatthe 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 ADJUSTMENTSlightly loosen the screw holding the Deflection Yoke. Adjust theDeflection Yoke to converge the detail in the outer area (left sideand right side) of the picture screen by orbital movement of thefront of the Yoke, then secure the Deflection Yoke in appropriateposition by putting the wedges as illustrated. Tighten screw hold-ing the Deflection Yoke.

RUBBERWEDGE

DEFLECTION YOKE

DEFLECTION YOKEMOUNTING SCREW

Figure 4. Deflection Yoke Movement

SIX-POLEMAGNET TABS FOUR-POLE

MAGNET TABS

ANGLEOF TABS

PURITYMAGNETTABS

432

1

FOCUS GAP(G3-G4)

Figure 1. Purity and Convergence Magnets

MAGNET TABS

ANGLE OF MAGNET TABS

Figure 5. Adjusting Magnet

-19-

C4LVFCabinet Parts List

1 610 299 4315 ASSY,BUTTON POWER2 610 295 2483 DEC IND3 610 299 4322 ASSY,BUTTON UNITED4 645 043 3801 BADGE,SANYO or 645 043 5058 BADGE,SANYO

5 610 299 4353 COMPL,CABINET FRONT5-a 610 299 4360 CABINET FRONT 5-b 645 019 2210 HANDLE

6 610 299 4377 DEC.SPEAKER

7 610 297 6403 CABINET BACK8 610 299 4766 LABEL RATING

9 645 050 2521 ASSY,REMOCON JXMKM 10 610 288 7631 RC-BATTERY LID

610 296 9290 INSTRUCTIONS MANUAL

Key No. Part No. Description Key No. Part No. Description

Note: Parts order must contain Service Ref. No., Part No., and descriptions.

i

Y ?

X

TXT/TV

0

7

1

4

8

5

2 3

6

9

BASS

JXMKM

PIC MODE

SWAP

F

-/--

P P

TV/

A•B

CH SCAN

TIMER

SURROUND

P

SYSTEM

10

VIDEO L-AUDIO-R

TV/AV F

P

PT

4

3 2 1

ANT 75Ω

7

8

6

5-a

5-b

9