JVC TV-20F242 Schematic

TV-20F242

TV-20F242 STANDARD CIRCUIT DIAGRAM

n

NOTE ON USING CIRCUIT DIAGRAMS

1.SAFETY

The Components identified by the symbol!are critical for safety. For continued safety, replace safety critical components only with
manufacturers recommended parts.

2.INDICATION OF PARTS SYMBOL [EXAMPLE]

In the PC board :R1209 R209

3.NOTE FOR REPAIRING SERVICE

This models power circuit is partly different in the GND.
Please, care must be taken for the following points.
(1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is
not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for
example, the chassis is pulled out.
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus
( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a
fuse or any parts will be broken.

Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice.

CONTENTS

SEMICONDUCTOR BASE CONNECTIONS

2

BLOCK DIAGRAMS

3

TV BLOCK DIAGRAM
Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM
MICON/POWER/OPERATION BLOCK DIAGRAM
HIFI BLOCK DIAGRAM

CONNECTION DIAGRAM

11

CIRCUIT DIAGRAMS

13

SYSCON PCB CHROMA/IF SCHEMATIC DIAGRAM
SYSCON PCB Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM
SYSCON PCB MICON SCHEMATIC DIAGRAM
SYSCON PCB IN/OUT SCHEMATIC DIAGRAM
SYSCON PCB SOUND AMP SCHEMATIC DIAGRAM
SYSCON PCB HIFI SCHEMATIC DIAGRAM
SYSCON PCB POWER SCHEMATIC DIAGRAM
MAIN PCB TV POWER SCHEMATIC DIAGRAM
MAIN PCB DEFLECTION SCHEMATIC DIAGRAM
DIGITAL COMB FILTER PCB SCHEMATIC DIAGR
CRT PCB SCHEMATIC DIAGRAM
OPERATION PCB SCHEMATIC DIAGRAM
AV PCB SCHEMATIC DIAGRAM
DECK PCB SCHEMATIC DIAGRAM

PATTERN DIAGRAMS

39

MAIN/CRT PCB PATTERN

SYSCON PCB PATTERN
AV PCB PATTERN
OPERATION PCB PATTERN
DECK PCB PATTERN

WAVEFORMS

47

TV-20F242

2-52

No.51768

VP0011
HK

Nov. 2000 No.51768

TV-20F242

C

E

C

C

K

E

C

K

C

SEMICONDUCTOR BASE CONNECTIONS

DIODE

CATHODE

ANODE

ANODE

1SS133T-77 11E1-EIC 10ELS2N-TA1B2 SID1050CM FMV-3FULF027-102 GBL06L-6177
HZ11B3L TD 11EQS04N-TA1B2 21DQ09N-FC4 SLR-342MCT32
HZ27-1L TD 11ES1N-TA1B2 21DQ09N-TA2B1 SLR-342VCT32
MTZJ13B T-77 RD12FB-T7 RMPG06J-G3
MTZJ30B T-77 RU2AM V1
MTZJ33B T-77
MTZJ5.1B T-77
MTZJ5.6B T-77
MTZJ6.8B T-77
MTZJ8.2C T-77
SB10-03A3

IC

CATHODE

TV-20F242

1

2

1

M62420SP AN3662FBP S-24C04BDP-LA PST600H KIA7805API BA6955N

1

5

STR-G6624 TLP621(GR) LA71067SM-MPB AN7522 TC90A45F LA78040

1

M61203CFP KIA7809API
OEC7043C KIA7809PI

1

1

1

3

1

1

2

3

1

1

1

7

TRANSISTOR

E

E

B

2SA1015Y(TPE2) 2SC1740SP(R,S) TP 2SD1667(R,S) 2SC2621(D,E)-RAC 2SA1037AKT146R,S SG-276
2SA1318(S,T)-AA DTC114TSTP 2SA1037KT147(R,S)
2SA1371(D,E)-AE 2SC2412KT146 R,S
2SA1624-AA
2SB892(S,T)-AE
2SC13840W
2SC1815Y(TPE2)
2SC2120Y(TPE2)
2SC2909(S,T)-AA
2SC3000-AA
2SC3331(S,T,U)-A
2SC945(C)-T(P,Q)
2SD400E
2SD734(E,F)-AA

B

B

C

E

E

C

B

C

B

E

A

G

B

C

2SD2499(LB0EC1) DTC114EKAT146 DTA124ESTP PNA2604M010R

O

DTC124EKAT146 DTC114ESTP RPI-301
DTC144EKAT146

I

I

G

E

E

A

No.51768No.51768

2-512-2

TV-20F242 TV-20F242

BLOCK DIAGRAMS

MICON/

OPERATION/

DECK

HIFI

Y/C/AUDIO/

HEAD AMP/

IN/OUT

Y/C/AUDIO/
HEAD AMP/

IN/OUT

TU1_AUDIO_A

SCL
SDA

TU1_VIDEO

TU601

1
4

5

11

MONITOR_V

SAW FILTER
CF601

1

TV BLOCK DIAGRAM

V. OUTPUT IC401 LA78040

AMP

VCC

2

THERMAL

PROTECTION

PUMP
UP

3

5

7

Q405

H-DRIVE

Q406

H. OUTPUT

FB401

8

+12

COL

9

+B

4

ABL

2

AFC

1

HEA

10

HV

EF
G2

F

7

11

8

DY

J801

V801

CRT

6

Q803, Q812

BLUE AMP

Q801, Q810

RED AMP

Q802, Q811

GREEN AMP

P. CON + 8V

Q610, Q611

UNGER+8V

AT+13V

CHROMA
IC601 M61203CFP

DELAY ADJ

62

RF AGC

1

64

54

60

BLACK STRETCH

31

VIF AMP

DEFEAT

GAMMA

CLAMP

VIDEO

TONE

DELAY

CHROMA

TRAP

AFT

63 48

IF AGC

AFT OUT

VIDEO

MUTE

VCO

VIDEO

DET

APC
DET

CHROMA

BPF

ACC

HPF

57

56

LOCK

DET

KILLER

DET

ACC

DET

CHROMA

APC
DET

55

DEMODULATOR

REG

41

5.7Vreg

RGB

MATRIX

CONTRAST

VCXO

VCO

ADJ

NC

42

RESET

P-ON-ON

BRIGHT

Q606

33

AFC 1

REG

Q602, Q603

REG

39 46 13

POWER ON

CONTROL

DRIVE
AMP

VERTICAL

COUNT DOWN

HORIZONTAL

COUNT DOWN

H VCO AFC 2

53

CLAMP

26

RGB

CUT OFF

AT+5V

P.CON+8V

P.CON+5V

BUS

I/F

HV

BLK

V.RAMP

1

10

5
27
14
15
16

17
29

HIFI

MICON/

OPERATION/

DECK

L503

DEGAUSS COIL

AC IN

AUDIO_OUT_L

AUDIO_OUT_R

DEGAUSS_H

TH501
DEGAUSS ELEMENT

3

2

F501

Q507

FEED BACK

SW.

Q502

SW.

VR502

Q512

+B ADJ

SW.

RY501

D501

RECTIFIER

FEED BACK

IC506 TLP621(GR)

RELAY

Q504

RELAY DRIVE

5

POWER REG.
IC502
STR-G6624

34

NC

1

T501

8

4

3536

15

10

12

14

9

P. CON + 9V

32

12

X602

3.579545MHz

F502

Q501

P.CON SW.

6

7

X_RAY_TEST

VD

AT + 13V

UNREG + 8V

5V REG.

1

3

IC501 KIA7805PI

DIGITAL SOUND CONTROL
IC301 M62420SP

9

10

7 14

2 19

P. CON + 5V

Q508, Q509

SW.

SOUND AMP
IC352 AN7522

6

1

8

5

9

2

4

12

10

AT+12V

POWER FAIL(DC)

SP352
SPEAKER

SP351
SPEAKER

VCR_POWER-H
TV_POWER-H

TV_A_MUTE

HD
OSD_BLK
OSD_B
OSD_R

OSD_G
AFT_M

2
6
7

5
4
3

1

HEADPHONE
JACK

J351

MICON/
OPERATION/
DECK

MICON/
OPERATION/
DECK

No.51768

2-3 2-4

No.51768

HIFI

TV-20F242 TV-20F242

Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM

FSC

CYL

FE HEAD

CP4001

EP/LP-CH2 (L)

1

EP/LP COM

2
3

EP/LP-CH1 (R)

SP-CH2 (L)

4

SP COM

5
6

SP-CH1 (R)

7

HF2(L)

HF COM

8

HF1(R)

9

HIFI

CP4003

FE HEAD (HOT)

1

FE HEAD (GND)

2

HF1

HF COM

HF2

Y/C/A/CCD/H.AMP
IC4001
LA71067M-MPB

85

84

83

82

88

89
90

91

X4001

3.579545MHz

61

7

62

VX01

L

H

H

L

REC AMP

5

6

AUTO BIAS

4

H.SW

H

H.AMP
SW

L

H.SW

Q604

PB.EE

99

BUFFER

TIMMING

P

R

FM
AGC

DELAY
PB

FM-EQ

PB
PHASE-EQ

EQ
AMP

PULL

AGC
AMP

3

51

R

P

DOUBLE
LIM

2

REC
FM-EQ

KIL

C-LPF

GCA

1

NC

53

DRIVER

B-UP
AMP

ACC
AMP

LINE
AMP

MUTE

100

96

FM
MOD

98

R

OUT

CCD

Main
CONV

P

KIL
B.D.

FM
DEM

ALC

97

49

80

WC
DC

47

CLAMP

3.58M
BPF2

3.58M
BPF1

PB
AMP

78

76

NL
EMPHA

V/I
CONV

SUB
LPF

Q4009

V-AGC

38

BUFFER

DATAIL
ENH

Y-LPF

40

42

P

R

P

SYNC
SEP

P

R

YNR/
COMB

N.L.
DEEM

NC1

Y/C MIX

P

R

R

1/2

FBC

Chara

INS.

6dB

CLAMP

VCA

CLAMP

Y/C R/P

AUDIO R/P

C ROT

RF SW IN

AUDIO

MUTE

H.A R/P

ENV DET

59
55
30
19

25

28

46

16
17

14

13
12
11
93

31

35

34

44

NC

Q4007

BUFFER

SP/LP/EP-H
INPUT_SEL
TRICK_PB-H/EE-H
DOC_XO_CTL

MONITOR_V

TU1_VIDEO

REC/EE/PB

C.ROTARY
H.SW
VCR_A_MUTE
V.REC_ST-H
ENV.DET

DUMMY_V.SYNC

SD_VIDEO

MICON/
OPERATION/
DECK

TV

MICON/
OPERATION/
DECK

A/C HEAD

CP4002

AUDIO PB

6

AUDIO REC

5
4

CTL+
CTL-

3
21AE HEAD(-)

AE HEAD(+)

T4001

5

6

4

2

3

1

Q4005

BIAS CTL

Q4006

BIAS OSC

P.CON+5V

2 3

Q4001, Q4002

AUDIO PB SW

No.51768 No.51768

Q4003

L4004

SW

2-5 2-6

FRONT_VIDEO_IN

NORMAL_A

REAR_VIDEO_IN

Y/C_AUDIO

CTL+
CTL-

HIFI

MICON/
OPERATION/
DECK

/

TV

CAPSTAN
DD UNIT

MICRO
MOTOR

Y/C/AUDIO/

HEAD AMP/

IN/OUT

LOADING
MOTOR

BOT SENSOR

DEGAUSS_H

VCR_POWER_H

CP1004

4

CTL

6

FG

CAP.M F/R

7

CP1005

CYL PG

1
3

CYL FG

5

CYL DRIVE

C_ROTARY

DUMMY_V.SYNC

INPUT_SEL

M101

LM

Q101

AT + 5V

P. CON + 5V

P. CON + 5V

EOT

Q1013

CP101

LDM+
LDM­BOT
VCC 4

TV-20F242 TV-20F242

MICON/OPERATION/DECK BLOCK DIAGRAM

TIMER SYSCON MICON

SW1001

23
1

4

14
2

14
2

3

3

MS_SEN A

Q1009

MS_SEN B

Q1003

Q1002

SENSOR SW

13

REEL SENS.

4

2

13

Q1005

REEL SENS.

42

D1003

SYSTEM RESET
IC1002
PST600H

LOADING MOTOR DRIVER
IC1003 BA6955N

POWER

SAVE

2

CP1006

LDM+

4

1

LDM-

3

2

BOT

2

3

CONTROL LOGIC

5

VCC1

Q1024

LED DRIVER

OUT

P. CON + 5V

STD

7

P. CON + 5V

3

Q1001

4

X1001
12MHz

IC1001 OEC7043B

TAB SW

50

1

MSSEN-A

2

MSSEN-B

23

SENS LED

REEL-T

80

79

REEL-S

22

DEGAUSS_H

27

VCR-POWER
CAP-PWM

76

CAP-FG

87
11

CAP-FWD

90

DRUM-PG

89

DRUM-FG

77

DRUM-PWM

68

CENTER LED

34

RESET-L

3

EOT

15

COLOR ROTARY

13

DUMMY-V.SYNC

33 INPUT_SELC

20

LDM-RVS

21

LDM-FWD

4

BOT

39

X-OUT(12MHz)

38 X-IN(12MHz)

HI-FI-H.SW

STEREO

X_RAY_TEST

POWER_FAIL_L

XC-OUT(32KHz)

XC-IN(32KHz)

V-REC-ST-H

CVIN

REC-H/EE-M/PB-L

SP/LP/EP-H

TRICK_PB-H/PB/EE-H

VIDEO-ENV

VCR_A_MUTE

IIC-DATA1

IIC-CLK1

CTL AMP-OUT

FF/REW-L

AFT(MONI)

OSD OUT1

V-SYNC

H/C-SYNC

KEY A

TV-POWER

REMOCON-IN

REC LED

T-REC LED

5HI-FI-ENV HIFI_ENV

19

100

41

85

36

35

95CTL+
94CTL­66
56
18VIDEO-H.SW
61
67YC DOC/XO-CTL
83
69

6

X1002

32.768KHz

81

72

97

71

Q1004

SDA

5

SCL

6

EEP ROM
IC1099
S-24C04BDP-LA

FF/REW_SW

73

R

64

G

63

62

B

7
60
59
58

82TV_A_MUTE

9

28

10KEY B

14

30

29

Q4205

REC LED SW

Q4206

T-REC

LED SW

Q4204

TV POWER

LED SW

POWER
ON/OFF

OS753

T-REC

D791

REC/OTR STOP/EJECT PLAY

321

REC/OTR

D793

CH DOWN

POWER

D792

CH UP VOL. UP VOL. DOWN

FF/CUE

AT + 5V

V. REC_ST_H

VCR_A_MUTE

HIFI_H.SW
ST_SELECT

X_RAY_TEST

POWER FAIL(DC)

SCL

SDA

CTL+
CTL­V. REC_ST_H
SD_VIDEO

H. SW

REC/EE/PB
DOC_XO_CTL
SP/LP/EP-H
TRICK_PB-H/EE-H
ENV_DET

SDA
SCL

OSD_R
OSD_G
OSD_B
AFT_M
OSD_BLK
VD
HD
TV_A_MUTE

TV_POWER_H

REW

HIFI

TV

HIFI

Y/C/AUDIO/
HEAD AMP
IN/OUT

TV

No.51768

2-7 2-8

No.51768

HF2

HF1

TV-20F242 TV-20F242

HIFI BLOCK DIAGRAM

HIFI AUDIO/H.AMP/DEM
IC5501
AN3662FBP

22

AMP

24

AMP

AGC

INPUT SW

10

15

J701

1
3
5

2

4

2
4
6
7

FRONT_VIDEO_IN

J4201

2
3

6

REAR_VIDEO_IN

Y/C/AUDIO/
H.AMP/IN/OUT

4

Y/C/AUDIO/

H.AMP/IN/OUT

HF_COM

FSC

Y/C_AUDIO

NORMAL_A

P.CON+5V

P.CON+9V

21

45
62
61

25

40

51
58

VCO-FO

ADJ

LOGIC

OUTPUT

SW

PNR

BPF

FM LIM

DEM

BLOCK

LOGIC

AMP

AMP

53

57

48

30
29

28

27

36

42

43
56

2

3

J4202

AUDIO_OUT_R
AUDIO_OUT_L

TU1_AUDIO_A

V. REC_ST_H

HIFI_ENV.

HIFI_H.SW

VCR_A_MUTE
SCL
SDA
ST_SELECT

TV

MICON/
OPERATION/
DECK

No.51768 No.51768

2-9 2-10

WIRING CONNECTION DIAGRAM

ABC DEF GH

8

7

J351

1

5

4

3

2

6

7

6

5

4

3

2

1

J701

H

2

H

4

H.OUT

SOUND+B

SOUND GND

1

2345678

CP820

DEGAUSS

COIL
L503

AC100V 50/60Hz

1

3

AV PCB
PCB250
TEXA18

GND

V.FEEDBACK

CD501

CD353

X-RAY TEST

POWER FAIL

TV POWER H

9

101112

CP502

2

1

CP501

1 2

1

2

3

4

5

6

7

DEGAUSS H

VCR POWER H

13

E

E

ACL

V.OUT

H.PULSE

21

21

FRONT VIDEO IN

GND

FRONT AUDIO IN

SOUND GND

SOUND OUT

SP OUT

GND

GND

1234567

CP810

FBT

FB401

MAIN PCB

PCB070
TMX460

GND

CP4202

1

2

3

4

5

6

7

AT+12V

MOTOR GND

1

2

3

4

5

UNREG+8V

UNREG+8V

HEATER

GND A

GND A

180V

OPERATION PCB

PCB030
TEXA17

CD751

CP4201

AT+30V

AT+13V

8

CP401

1

2

3

4

CP803A

NC

GND

AT+5V

REMOCON OUT

CD803

FOCUS SCREEN

KEY A

OTPB LED

POWER ON L

ANODE

CP803B

TV-20F242 TV-20F242

INTERCONNECTION DIAGRAM

COMB FILTER PCB

PCB300

VEX911

CP601

SOUND+B

SOUND GND

H.OUT

GND

V.FEEDBACK

V.OUT

ACL

H.PULSE

TV POWER H

POWER FAIL

X-RAY TEST

VCR POWER H

DEGAUSS H

CD810

GND

AT+12V

MOTOR GND

UNREG+8V

UNREG+8V

AT+13V

AT+30V

CD850

B.OUT

R.OUT

G.OUT

CUT OFF

GND

CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY

T-REC LED

4

3

FOCUS

SCREEN

REC LED

5

HEATER

GND A

GND A

NC

180V

CRT

DY

CRT SOCKET

1

REMOCON SENSOR

OS753

GND

3

2

B+

1

Vout

987654321

121110

KEY B

PLAY LED

ON TIMER LED

CS REC LED

987654321

121110

H.V

6

7

J801

F

1

2

3

4

5

CP807

1

V801

8

CP801

1

2

9

CUT OFF

B.OUT

R.OUT
G.OUT

GND

GND A

GND A

CRT PCB

PCB110
TCX320

TM101

SYSCON PCB

PCB010
VMX188

CP850

1

2

3

4

5

CD801

GND

J4201

8

2

2

SOUND L-

16 OHM

SPEAKER

CP1004

SP352

1

2

3

4

5

6

7

8

GND

MOTOR GND

I LIMIT

CTL

VCO

FG

CAP.M F/R

VCC(5V)

7

ROTOR

MAGNETCOIL

MR

FG SENSOR

G

O

VCC

CAPSTAN DD UNIT
DECK MECHA ASS’Y

M2001

6

HALL

IN

MAIN

OUT

SWITCH

LOGIC

HALL

SENSOR

HALL
VCC

1

2

3

4

5

6

7

8

CY901CP604

FSC

P.CON+5V

54321

GND

Y IN

C IN

MONITOR V.OUT

66

54321

SP351

16 OHM

SPEAKER

CD351

CP351

1

1

SP OUT L+

5

HEAD AUDIO CONTROL ASS’Y

CP4002

6

AUDIO PB

AUDIO REC

5

CTL+

4

CTL-

3

AE HEAD(-)

2

AE HEAD(+)

1

2

3

4

5

6

7

8

9

10

11

12

13

1

2

3

4

5

6

7

8

1

2

3

4

5

J4202

E

E

1

23

H1H2

NC

NC NC

NC

1

23

H1H2

TU6002

14 15

IF IF

11

10

+30V

9

8

+5V

7

6

SDA

5

SCL

4

3

2

AGC

1

12 13

NCNC

NC

NC

TU601

14 15

11

10

9

8

7

6

5

4

3

2

1

12 13

ARESINCE THESE PARTS MARKED BYCAUTION:

1

CP4003

FE HEAD (GND)

FE HEAD (HOT)

1

2

3

4

CP1005

5

+30V

4

3

2

+5V

1

SDA

CP4001

SCL

1

2

3

4

AGC

DANGEREUSES AN POINT DE VUE SECURITE
N’UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES

2

1

CP1006

VCC

BOT

LDM-

LDM+

CYL DRIVE

CYL GND

CYL FG

CYL +B

CYL PG

SP-CH2 (L)

SP COM

SP-CH1 (R) 4

FFC

2

FE HEAD (GND)

1 FE HEAD (HOT)

FFC

ETANTLES PIECES REPAREES PAR UNATTENTION:

6

AUDIO PB

5

AUDIO REC

4

CTL+

CTL-

3

AE HEAD(-)

2

AE HEAD(+)

1

FULL ERASE HEAD ASS’Y

H5002

FFC

CD2001

CYL DRIVE

CYL GND

CYL FG

CYL +B

CYL PG

1

2

3

OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE

H5001

AUDIO

CONTROL

AE

DECK PCB

PCB550
VE8851

RED

CP101

5

4

3

2

1

VCC

BOT

LDM-

LDM+

4

3

2

1

MICRO MOTOR

M2003

VCC

DRIVE CONTROL

GND

FG

PG

FG.PG GND

CH2

CH1

SP
HEAD

WHITE

Q101

BOT SENSOR

CYLINDER UNIT ASS’Y

UN4001

LM

LOADING MOTOR

M101

THE TIMETHIS INTERCONNECTION DIAGRAM IS THE LATEST ATNOTE:

4

3

2

1

ABC DEF GH

No.51768

2-11 2-12

No.51768

CIRCUIT DIAGRAM

[SYSCON PCB CHROMA/IF SCHEMATIC DIAGRAM]

ABC DEF GH

FROM/TO MICON

IIC_OFF

8

7

6

5

4

CD4205 CH01812A

3

2

1

DEGAUSS_H

POWER_FAIL[DC]

VD
OSD_R
OSD_G
OSD_B

OSD_BLK

SDA
SCL

AFT_M

VCR_POWER_H

HD

TV_POWER_H TU1_AUDIO_A
X_RAY_TEST

TEST POINT

CP602_1

8283_0712_00_000

INTELLGENT MONI

7

B.OUT

6

AGC M

5

4

IIC OFF

3

SDA

2

SCL

1

GND

1

AGC

2

3

4

SCL

5

SDA

6

7

+5V

8

9

+30V

10

TU601 NJH3022U268

11

IF

FROM/TO CHASSIS

1

GND

FROM/TO POWER

P.CON+5V[CHROMA]

1213

1.8
NC

0

2.5

2.5

2.5
NC

0

4.9
NC

0

29.3
NC

S811X

2.0

0

1415

AT+30V

P.CON+5V[TU1]

P.CON+8V

8.7VREF

5.7VREF[PCON]

5.7VREF[AT]

AT+13V

P.CON+5V

2.250V KA

C609

0.1 B

R603

R602

220 1/4W

220 1/4W

C607

0.1 B

C602_1

0.1 F

CF602

C601

150V KA

GND

THE RESISTOR MARKED F IS FUSE RESISTOR.NOTE:
THE ALUMI ELECTROLYTIC CAPACITOR MARKED NP
IS NON POLAR ONE.

THE DC VOLTAGE AT EACH PART WAS MEASURED

NOTE:

WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST

WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

R605

C610

W955

W937

(R6015)

R628

MKT47.3MC110P

R629

22K

VR6001_1

6.8K

S811Y

1.6

2.2K

SEP.

4.7K

R6001

(C6008)

S817X_1

(R6036)

W938

S824X_1

C613

0.1 B

C612

2206.3V YK

L603

1K

L602

R665

2.7uH

PRI.AMP

7.2
Q612

2SC3000

0.8

33

R632

1K

100uH

R671

L616

B.OUT

AGC_M

S817Y

S824Y

1K

100uH

TU1_VIDEO

TU1_AUDIO_A

29

R674

12.4

2.5

AFT_M

AGC_M

C675

0.1 B

0607

NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME

ABC DEF GH

220

2.0

BUFFER

Q601

2SA1037AK

CF603

R608

10K

C625

1F

C621

OUTOUTGININ

L605

2.7uH

C629

R621

C632

C627

1B

L620

47uH

R620

12K

22 CH

C687

2.250V KA

C626

0.1 B

C622

0.22 B

C634

0.01 B

1K

150P B

L613

47 1/2W

R601

2.2K

26

C668_1

2250V KA

L615

100uH

0607

3.1

BUFFER

Q607

2SC2412K

L608

100uH

C614

0.01 B

C620

C623_1

68P CH

D601 1SS133

R609 330

C618 5P CH

100 1/4W

R616

2.7

0

476.3V KA

EFCT4R5YS5A

R611

10K

R618 10M

D602 MTZJ8.2C

R607

220 1/2W

R610

R614 180K

SAW FILTER

CF601

SAF45MFY220ZR

12345

C616

0.01 B

C624

4716V KA

0.01 B

OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE

TV-20F242 TV-20F242

CHROMA/IF SCHEMATIC DIAGRAM

5.7VREF[AT]

5.7VREF[PCON]

L618

C676

33uH

82P CH

L607

R622

2.2uH

R673

1K

R681

CF604

EFCT4R5MW5

10uH

390

R672

2.3

2.4

2.3

3.0
NC

2.0

3.2

9.0

150K

3.0

2.2

0

0

2.4

2.9

2.3

2.7

1.5

CHROMA

IC601

M61203CFP

C635

C674_1

0.1 B

4716V KA

C640

0.1 B

470

C636

0.01 B

2.0 2.0 8.2 8.2 8.2 4.0 5.5 5.6 0 0 3.2 3.2 2.0 8.8

49

50515253545556575859

AUDIO BYPASS

EXT AUDIO IN

FM DIRECT OUT

VIF VCO F/B

VREG Vcc

VIF APC FILTER

VIF VIDEO OUT

VIF GND

AFT OUT

6061626364

QIF IN

RF AGC OUT

RF AGC FILTER

VIF Vcc

2

3

1 10111213141516

1.5 5.0 5.0 2.6 3.6 0.8 2.5 0 0 3.6 3.4 3.9 4.8 2.5 2.5 2.4

C639

W813

C637

R6242KR627

0.01 B

L610

100uH

0607

22025V YK

C641

W949

10K

R625

Hi Vcc

46 SW REG CONT 34 EXT C in
47 LIMITER IN
48 IF AGC
49 QIF OUT
50 AUDIO OUT

64 VIF IN

1 VIF IN

SCL

H VCO F/B

5

6

R626

0.01 B

100

R655

H_PLUSE

SCL

CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY

NC

MCU RESET

INTELLIGENT MONI

5.7V REG OUT(FOR CPU)

H OUT

DEF

FBP IN

789

2.2K

R656

10K

R657

10K 1/4W

H_OUT

D607

1SS133

NC

1K

2.84.8

Y SW OUT

R630

SDA

5v REG

33 8.7V REG OUT
32 X’TAL
31 ACL/ABCL

17 V OUT
16 B OUT

SDA

AFC FILTER

C645

R631

100

R677

3.3M

27

TV/Y IN

VIDEO/CHROMA GND

H.PLUSE OUT

POWER ON CONT

D608

MTZJ6.8B

150V KA

R658 2.2K

C647

0.01 B

6.8K

VCR_POWER_H

ARESINCE THESE PARTS MARKED BYCAUTION:

R633

C649

VIDEO CHROMA Vcc

V RAMP FEEDBACK

R.OUT

(SYSCON PCB)

8.7VREF

C648

0.1 M

8.2K

150V KA

C650

0.015 B

333435363738394404142434445464748

R IN

CHROMA APC FILTER

V PULSE OUT

G IN

FAST BLK

SPOT KILLER

fsc OUT

V RAMP CAP

B IN

STRAT UP Vcc

G OUT

R OUT

D609

MTZJ6.8B

D612

R659 2.2K

R660 2.2K

1SS133

100

R634 100

R636 100

R635

G.OUT

B.OUT

28

5.6K

R680

C656

1B

C654

18P CH

X602

3.3

100CT3R505

3.0

3.579545MHz

0

30 31 32

4.7

0

0.1

7.3

5.0

D617

4.9

4.9

4.8

2.0

20 21 22 23 24 25 26 27 28 29

0

8.5

8.5

17 18 19

3.8

MTZJ6.8B

KA

4716V

C660

0.1 B

C659

W876

R683

C653

0.01 B

C655

D613

MTZJ6.8B

D616

1SS133

D618

1SS133

DANGEREUSES AN POINT DE VUE SECURITE
N’UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES

R685

2.2K 1/4W

4716V KA

R684

2.2K 1/4W

W804

R670

FROM/TO DIGITAL COMB FILTER

P.CON+5V

C663

390P CH

W956

L614

100

6.8uH

MONITOR_V

(CY901)

CP604

IMSA-9130B-06

P.CON+5V

FSC

GND

C IN

Y IN

MONITOR V.OUT

FROM/TO HIFI

1

2

3

4

5

6

8

7

FROM/TO Y/C/A/H.AMP

TU1_VIDEO

MONITOR_V

FROM/TO SOUND AMP

SOUND+B

SOUND_GND

TO CRT

CD850 CH25086A

(CP805)

GND

CUT OFF

G.OUT

R.OUT

B.OUT

FROM/TO DEFLECTION

(CP820)
CD601_1 CH2D068A

SOUND+B

SOUND GND

H.OUT

GND

V.FEEDBACK

V.OUT

ACL

H.PLUSE

TV POWER H

POWER FAIL

X-RAY TEST

VCR POWER H

DEGAUSS H

L617

HF57T18.5*10*10

5

4

3

2

1

PCB010
VMX188

6

5

1

4

2

3

4

5

6

7

8

9

10

11

12

13

3

2

1

R646

15K

R642

6.8K

R643

47K

C658

0.22 B
C644

0.022 B
D614

MTZJ6.8B

C664

1 MMTS

W809

C661

0.01 B

C665_1

1016V KANP

R647

2.2K

R648

2.2K

C630 0.022 B

D615

MTZJ6.8B

R652

4.7K

C615

0.001 CH

D605

11ES1N

C671

220P CH

C669

0.1 B

ACL

OSD_BLK

V_OUT

OSD_B

OSD_G

OSD_R

VD

SOUND+B

SOUND_GND

H_OUT

V_OUT

ACL

H_PLUSE

TV_POWER_H

POWER_FAIL[DC]

X_RAY_TEST

VCR_POWER_H

DEGAUSS_H

HD

G.OUT

R.OUT

B.OUT

R638

6.8K

R641 27K

R649 2.2K

2.2K

W825

R.SIGNAL
G.SIGNAL
B.SIGNAL

ETANTLES PIECES REPAREES PAR UNATTENTION:

DEFLECTION SIGNAL

AUDIO SIGNAL(REC)

TUNER VIDEO SIGNAL

No.51768 No.51768

2-13 2-14