Sony SLVGA-40-K Service manual

SLV-GA30/GA40K/GA60/GA77K/GF90K

RMT-V254/V254A

SERVICE MANUAL

G j

Photo: SLV-GA77K

S MECHANISM

Refer to the SERVICE MANUAL of VHS MECHANICAL ADJUSTMENT MECHANICAL ADJUSTMENTS. (9-921-647-11)

for

RMT-V254

SPECIFICATIONS

E Model

Tourist Model

SLV-GA60/GA77K/GF90K

Philippine Model

SLV-GA30/GA40K

MICROFILM

VIDEO CASSETTE PLAYER

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer.

1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are "pinched" or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair . Point them out to the customer and recommend their replacement.

4. Look for parts which, through functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

5. Check the B+ voltage to see it is at the values specified.

6. Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

— 2 —

Abbreviation

MJ: E, Tourist Model PL: Philippine Model

MODEL (SLV-) GA30 GA40K GA60 GA77K GF90K FEATURES PL PL MJ MJ MJ NTSC 3.58 REC/PB X/O X/O O/O O/O NTSC 4.43 REC/PB X/X X/X O/O O/O O/O PAL REC/PB X/X X/X O/O O/O O/O MESECAM REC/PB X/X X/X O/O O/O O/O NTSC PB ON PAL TV X X O O O REC MODE NTSC X X SP/EP SP/EP SP

PAL X X SP/LP SP/LP SP

PLAY MODE NTSC SP/LP/EP SP/LP/EP SP/LP/EP SP/LP/EP SP

PAL X X SP/LP SP/LP SP AUDIO SYSTEM MONO MONO MONO MONO Hi-Fi KARAOKE X O X O O KARAOKE PON X X X O O SOUNDS IN STEREO XXXXX SURROUND X X X O X TAPE SPEED O X O O X LINE IN (RCA PINS) FRONT X X X 3 3

REAR X X 2 3 3 LINE OUT(RCA PINS) FRONT X X X 3 X

REAR 22233 RF IN/OUT USA USA GK GK GK REMOTE COMMANDER RMT-V254A RMT-V254A RMT-V254 RMT-V254 RMT-V254

— 3 —

Step 1 Unpacking ······································································ 1-1 Step 2 Setting up the remote commander··································1-1 Step 3 Connecting the unit ························································ 1-1 Step 4 Tuning your TV to the unit ·············································1-2 Playing a tape ············································································ 1-2 Playing/searching at various speeds ·········································· 1-3 Karaoke sing-along····································································1-4 Adjusting the picture (Resolution Control) ·······························1-5 Editing with another VCR ·························································1-5 Synchronised recording ·····························································1-6 Troubleshooting·········································································1-6 Index to parts and controls ························································ 1-7

2. DISASSEMBLY

2-1. Upper Case, Panel Block Assembly ································2-1 2-2. FR-140, 141, 142, JK-166, MJ-91 Boards ······················2-1 2-3. Rear Panel········································································2-2 2-4. MA-336 Board ································································ 2-2 2-5. Mechanism Deck ·····························································2-3 2-6. Internal Vie ws·································································· 2-4 2-7. Circuit Boards Location ··················································2-5

3. BLOCK DIAGRAMS

3-1. Overall Block Diagram ··················································· 3-1 3-2. Video Block Diagram ······················································ 3-3 3-3. Servo/System Control Block Diagram ····························3-5 3-4. Audio Block Diagram ····················································· 3-7 3-5. Karaoke Block Diagram ··················································3-9 3-6. Power Supply Block Diagram ·······································3-11

4. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

4-1. Frame Schematic Diagram ·············································· 4-3 4-2. Printed Wiring Boards and Schematic Diagrams ············4-5

•MA-336 (Video, Audio)(1/4) Schematic Diagram ·······4-5

•MA-336 (Servo/System Control)(2/4) Schematic Diagram ·········································4-7

•MA-336 (HiFi, Tuner)(3/4) Schematic Diagram ··········4-9

•MA-336 (Karaoke, Power Supply)(4/4) Schematic Diagram ·······································4-11

•MA-336 (Video, Audio, Servo/System Control, Tuner,

Karaoke, Power Supply) Printed Wiring Board ··········4-13

•SR-35 (Surround) Printed Wiring Board ····················4-16

•SR-35 (Surround) Schematic Diagram ·······················4-17

•FR-142 (Mode Control) Printed Wiring Board···········4-19

•FR-142 (Mode Control) Schematic Diagram ·············4-21

•FR-140 (Power, Eject Switches) Printed Wiring Board and Schematic Diagram ·······································4-23

•FR-141 (Tape Operation) Printed Wiring Board and Schematic Diagram ·······································4-24

•MJ-91 (MIC Jack, Amp) Printed Wiring Board and Schematic Diagram ·······································4-25

•JK-166 (Line In/Out) Printed Wiring Board and Schematic Diagram ·······································4-26

5. INTERFACE, IC PIN FUNCTION DESCRIPTION

5-1. System Control — Video Block Interface

(MA-336 Board IC201) ···················································5-1

5-2. System Control — Servo Peripheral Circuit Interface

(MA-336 Board IC201) ···················································5-1

5-3. System Control — Mechanism Interface

(MA-336 Board IC201) ···················································5-2

5-4. System Control — Audio Block Interface

(MA-336 Board IC201) ···················································5-2

5-6. Servo/System Control Microprocessor Pin Functions

(MA-336 Board IC201) ···················································5-3

6. ADJUSTMENTS

6-1 Mechanical Adjustments ·················································6-1 6-2. Electrical Adjustments····················································· 6-1 2-1. Preparation before Adjustment········································ 6-1 2-1-1.Equipment Required ························································6-1 2-1-2.Equipment Connection ···················································· 6-1 2-1-3.Set-up of Adjustment·······················································6-1 2-1-4.Alignment Tape ·······························································6-1 2-1-5.Input/Output Levels and Impedance ······························· 6-2 2-1-6.Adjustment Sequence ······················································ 6-2 2-2. POwer Supply Check ······················································6-2 2-2-1.Output Voltage Check (MA-336 Board) ·························6-2 2-3. Servo System Check························································ 6-3 2-3-1.RF Switching Position Adjustment (MA-336 Board) ·····6-3 2-4. Audio System Adjustment···············································6-3 2-4-1.Hi-Fi Audio System Adjustment (Hi-Fi model only) ······6-3

1. AF Switching Position Adjustment (MA-336 Board)····· 6-4

2-4-2.Normal Audio System Adjustment··································6-4

1. ACE Head Adjustment ····················································6-4

2. E-E Output Level Check ·················································6-4

3. Recording Bias Check ·····················································6-4

2-5. Adjusting Parts Location Diagram ··································6-6

7. REPAIR PARTS LIST

7-1. Exploded Vie ws ·······························································7-1 7-1-1.Front Panel and Upper Case Section ·······························7-1 7-1-2.Chassis Section ································································7-3 7-1-3.Mechanism Deck Section-1·············································7-4 7-1-4.Mechanism Deck Section-2·············································7-5 7-1-5.Mechanism Deck Section-3·············································7-6 7-2. Electrical Parts List ·························································7-7

— 4 —

SLV-GA30/GA40K/GA60/GA77K/GF90K

SECTION 1

GENERAL

This section is extracted from instruction manual.(SLV-GF90K model)

1-1

1-2

1-3

1-4

1-5

1-6

1-7E

SECTION 2

w

DISASSEMBLY

NOTE: Follow the disassembly procedure in the numerical order given.

2-1. UPPER CASE, PANEL BLOCK ASSEMBLY

1

T apping screw

7

Flat cable (From CN206 on MA-335 board)

8

Flat cable (From CN201 on MA-335 board)

9

Connector (From CN207 on MA-336 board)

Hooks

SLV-GA30/GA40K/GA60/GA77K/GF90K

3

Upper case

2

T apping scre

4

Flat cable (From CN206 on MA-336 board)

5

Connector (From CN209 on MA-336 board)

!º

Panel block assembly

(Engaged by the hook.)

Hooks

2-2. FR-140, 141, 142, JK-166, MJ-91 BOARDS

!™

BV sumitite (B3)

!£

MJ-91 board

!¡

MIC jack holder

2

FR-140 board

!º

B2.6 × 8

1

B2.6 × 8

9

Hooks

6

Connector (From CN208 on MA-336 board)

5

B2.6 × 8

Front panel assembly

2-1

7

B2.6 × 8

8

JK-166 board

4

FR-141 board

6

FR-142 board

3

B2.6 × 8

2-3. REAR PANEL

3

Rear panel

(Engaged by the hook.)

2-4. MA-336 BOARD

Hooks

1

BVTP 3 × 12

Hooks

2

POWER code stopper

1

Sumitite (B3) +BV

2

MA-336 board with

mechanism deck

2-2

2-5. MECHANISM DECK

3

BVTP 3 × 12

9

Mechanism deck

Three connectors

2

5

BVTP 3 × 12

1

4

MD base (R)

6

MD base (R)

7

MD base (M)

8

MA-336 board

2-3

2-6. INTERNAL VIEWS

y

— T op View —

M901 Drum Assembly

DZH-91A-R 1-759-449-11 (GF90K) DZH-89A-R 1-759-453-11 (GA60/GA77K) DZH-71D-R 1-759-455-11 (GA30/GA40K)

FE head 1-500-144-11

Reel (S) table 3-977-507-01

ACE head block assembly A-6759-620-A

Pinch press block assembl A-6759-615-A

Reel (T) table 3-977-508-01

— Bottom View —

FL complete assembly A-6759-619-B

M902 DC motor (capstan) 1-698-971-11

Rubber belt 3-977-510-01

M903 Cam motor assembly X-3947-577-1

2-4

2-7. CIRCUIT BOARDS LOCATION

MJ-91 (MIC JACK, AMP) [GA40K/GA77K/GF90K]

FR-140 (POWER, EJECT SWITCHES)

JK-166 (LINE IN/OUT) [GA77K/GF90K]

FR-142 (MODE CONTROL)

FR-141 (TAPE OPERATION)

MA-336 VIDEO, AUDIO, SERVO/SYSTEM CONTROL, TUNER, POWER SUPPLY

SR-35 (SURROUND) [GA77K]

2-5E

3-1. OVERALL BLOCK DIAGRAM

SECTION 3

SLV-GA30/GA40K/GA60/GA77K/GF90K

BLOCK DIAGRAMS

VIDEO HEAD

SP

CH1

SP

CH1

CNJ801

VIDEO

LINE IN 1

GA77K/GF90K MODEL

CNJ651

VIDEO

LINE IN 2

AFM

REC/PB

HEAD

CH1

CH2

AUDIO

HEAD

ERASE

HEAD

FULL

ERASE

HEAD

CNJ801

L

AUDIO

LINE IN 1

GA77K/GF90K MODEL

R

CNJ651

L

AUDIO

LINE IN 1

R

MCJ501

1

MIC IN

MCJ502

2

GA40K/GA77K/GF90K MODEL

MA-336 BOARD

REC/PB (RF)

V1

(SEE PAGE 4-26)

JK-166 BOARD

V2

IC302

AFM

REC/PB

AMP

T401

Q401-404

BIAS OSC

EXCEPT GA30/GA40K MODEL

(SEE PAGE 4-26)

JK-166 BOARD

L2

R2

MJ-91 BOARD

IC501

(SEE PAGE 4-5, 7, 9, 11)

PB RF REC RF AF SWP

REC P

Q405,406

BIAS OSC

(SEE PAGE 4-25)

MIC 1

MIC 2

(SEE PAGE 4-21)

FR-142 BOARD

16

PROCESSOR

L1R1L2

ECHO

IC101

VIDEO

REC/PB AMP

Y/C PROC.

IC301

AUDIO

(HIFI)

R2

IC501

S501

KARAOKE

(1/2)

GF90K MODEL

AF ENV

SDA/SCL

GA77K MODEL

MESECAM

V DATA / V CLK

QVD V ENV

CSYNC

JS921

JS922

MIC

KARAOKE PON

KR SW/ECHO VR

IC201

OSD

Q224,225

L1

R1 NA IN

NA OUT

GA60 MODEL

JS901

IC751

INPUT

SELECTOR

GA77K/GF90K MODEL

GF90K MODEL

JS925

JS926

(1/2)

EXCEPT GA30/GA40K MODEL

GF90K MODEL

JS931

JS932

GA77K MODEL

JS929

JS930

IC752

GA77K MODEL

IC101

AUDIO

PROCESSOR

(NORMAL)

(2/2)

GA30/ GA60 MODEL

JS902

GA30/ GA40K/ GA60 MODEL

JS910

IC581

AMS

GA40K/ GA77K/ GF90K MODEL

GF90K MODEL

JS904

JS905

GA77K MODEL

JS907

IC701

VOCAL

CANCEL

GA30/

GA30/ GA60 MODEL

JS906

GA40K/ GA77K MODEL

JS908

EXCEPT GA77K MODEL

SURR(A)

JS927

JS928

GA77K MODEL

SR-35 BOARD

(SEE PAGE 4-17)

IC702 IC503

IC703

SS/

SURR(B)

Q801 BUFF

JK-166 BOARD

EXCEPT GA30/GA40K MODEL

VIDEO TV/VTR AUDIO

GA77K/GF90K MODEL

IC502

KARAOKE

PROC.

/SRAM

CNJ801

VIDEO

LINE OUT1

(SEE PAGE 4-26)

CNJ651

VIDEO

LINE OUT2

L

AUDIO

LINE OUT2

R

GA77K MODEL

CNJ801

L

AUDIO

LINE OUT1

R

RFU801

IN

OUT

PH202 T REEL

FG PH201 S REEL

FG

Q201

T

SENS Q202

S

SENS

IC203

RESET

V DATA / V CLK

SIGNAL

CONTROL

MESECAM

QVD

V ENV

CSYNC

SDA / SCL

AF ENV AF SWP REC P

T REEL

S REEL

T SENS

S SENS

TE/LED

AMS

IC201

DRUM

SERVO

CAPSTAN

SERVO

SYSTEM

CONTROL

(2/2)

DRUM DA

DRUM FG/PG

CAP RVS

CAP FG

CTL

MODE1-4

LED POWER

KEY1

KEY2

SYNC REC

KEY4

S203

REC

KEY3

S204

PAUSE

ADJ-A ADJ-BADJ-B

Q207-209 Q211-213

Q233

DRIVE

RMC

LED

IC202

CAM

MOTOR

DRIVE

GF90K MODEL

GA30/GA40K MODEL

KEY(1)

KEY(2) KEY(4)

MD BLOCK

DRUM

M

MOTOR

DRUM FG/PG

CAPSTAN

M

MOTOR

CAPSTAN

FG

M

MOTOR

CAM

S201

ENCODER

Q601 Q602

LED

DRIVE S601,602 FUNCTION

KEY

S606-609

S620

FUNCTION

KEY

S615

LINE

SELECT

S603

VIRTUAL

SOUND

GA77K MODEL

S611-614 FUNCTION

KEY

IC601

REMOTE CONTROL RECEIVER

CTL

HEAD

CAM

EXCEPT GA30/GA40K MODEL

D601

FR-140 BOARD

(SEE PAGE 4-23)

EXCEPT GA30/GA40K MODEL

D602

FR-141 BOARD

(SEE PAGE 4-24)

GA77K/GF90K MODEL

D603-607 D608 D609 D610-612

D613 D614

D615,616

S610 NTSC

PB

EXCEPT GA30/GA40K MODEL

S605

COLOR

SYSTEM

EXCEPT GA30/GA40K MODEL

GF90K MODEL GA30/GA40K MODEL GA77K MODEL

FR-142 BOARD

(SEE PAGE 3-21)

3-1 3-2

SLV-GA30/GA40K/GA60/GA77K/GF90K

3-2. VIDEO BLOCK DIAGRAM

CN101 3 REC/PB

1

(SEE PAGE 4-5)

CN202

1

16

Q102 BUFF

DRUM FF

SP1

SP2

31

30

28

IC101 &¡ REC/PB

IC101 &∞ REC/PB

4.433619MHz

CN101 2 PB

0.1V/div 0.2µsec/div

25Hz

IC101 *§, *ª REC

0.5V/div 0.1µsec/div

5Vp-p

FOR

CHECK

DRUM VIDEO

HEAD

SP

CH1

SP

CH2

(SEE PAGE 4-26)

CNJ651

VIDEO

IN 2

MA-336 BOARD

CN101

V SW P

3

PB RF

2

CN102

6

5

2

1

V IN2

JK-166 BOARD

GA77K/GF90K MODEL

CN651

89

88

86

87

CNJ801

VIDEO

IN 1

SW30

SW29

SP SP

VCA

REC

MUTE

ATT

(-10dB)

ATT

(-10dB)

ATT

(-10dB)

3.579545MHz

IC101 &£ REC/PB

4.433619MHz

79 7881

0.54Vp-p

0.1Vp-p

SW7

0.66Vp-p

SW28

SW27

TRAP

P EQ

MMS

VIDEO

AGC

629

FM

DL

IC101

VIDEO

REC/PB AMP

Y/C PROCESSOR

HPF

SEP

COMP

PR

SW8

X-TAL

VCO/OSC

X101

4.43MHz

X102

3.58MHz

MUTE

SW19

DET

ENV

REC

HPF

LPF

76717375

Q101Q101

84

1/2

1M

HPF7MLPF

97

SW20

P

R

ACC

CTL TRAP

2FL

4 PHASE

VCO

GEN

G EQ DLIM DEMO

LPF

CR DET

2fSC

REC APC

PB

APC

REC AFC

EXCEPT GA30/GA40K MODEL

fH HPF

P

R

SW18

MODE

FM

PULSE

GEN.

SUB LPF

TRAP

MAIN

CONV.1

MAIN

CONV.2

SW24

P

R

MAIN EMPH

CARRIER

OFFSET W.C/DC

SW5

SW21 R

P

C

LPF

MIX

LEVEL

C

LPF

R

SW23

P

R

SW22

P

MAIN

DE-EMPH

Q104 Q103

24

TO/FROM

13

SYSCON

80

BLOCK

27

(SEE PAGE 3-5)

EXCEPT GA30/GA40K MODEL

Q224,225

IC201

Q215,216

BUFF

Q205,214

2fSC

AMP

IC101 #∞ REC/PB

IC101 $§ REC/PB

IC101 ^º REC/PB

IC101 $™ REC/PB

IC101 %º REC/PB

43

52 53

IC201 %£ REC/PB

8.86716MHz

REC:0.41Vp-p

H

PB:0.6Vp-p

REC:0.28Vp-p

H

PB:0.35Vp-p

REC:0.28Vp-p

H

PB:0.35Vp-p

IC101 $¢ REC/PB

8.8671MHz

REC:0.35Vp-p

H

PB:0.38Vp-p

H

C SYNC IC201

4.6Vp-p

OSD

(1/3)

54

FROM AUDIO

BLOCK

(SEE PAGE 3-8)

45

2.6Vp-p

0.45Vp-p

RFU AUDIO

IC201 $£$∞ REC/PB

3

CN202

Q801 BUFF

2Vp-p

H

(SEE PAGE 4-26)

CN651

V OUT2

3

JK-166

BOARD

RFU801

2

AUDIO

4

TV/VTR

1

VIDEO

IN

OUT

CNJ801

VIDEO OUT 1

CNJ652

VIDEO OUT 2

GA77K MODEL

IC101 %∞ PB

B.D CK

C.K B.E

SW25 R

DL

SW10

P R

R

SW17

RP

FBC/ ALC

H

NP

Y

LPF

SW13

D.E. N.C.

0.58Vp-p

IC101 %• REC/PB

H

SW26 PRP

N.L.

DE EMPH

N.L.

EMPH

REC:0.4Vp-p

PB:0.5Vp-p

CCD LPF

VCA

SW11

R P

IC101 %™ REC/PB

H

6dB

5455

AMPCSQUELCH

CLP

DO

DO REC

REC:2.2Vp-p

PB:2.3Vp-p

58

60

23

Y NR

SW14

VIDEO

ALC

6dB AMP

CLEAR

SYNC

SQUELCH

35

46

CCD

24

IC101 #ª REC/PB

IC101 @¡ REC/PB

SYNC

SEP

RF SW P IC201 V ENV IC201 MESECAM IC201 QVD IC201

52

51

C

LPF

26 39

Y

CCD

4221

CLOCK

44

REC:0.5Vp-p

H

PB:0.6Vp-p

0.4Vp-p

H

50

CLP

IC101 ^ª REC/PB

69

IC101 !• REC/PB

KILL

63 62

64

SERIAL

REC:0.4Vp-p

H

PB:0.48Vp-p

16

Q204

PAL

191718

Q217-219

SHARPNESS

CONT

0.46Vp-p

8.667MHz

V DATA IC201 V CLOCK IC201

KILL IC201

SHARP 1 IC201 SHARP 2 IC201 SHAPNESS IC201

NTSC IC201

100

99

19

20 29 94

18

TO/FROM

SYSCON

BLOCK

(SEE PAGE 3-5)

3-3 3-4

3-3. SERVO/SYSTEM CONTROL BLOCK DIAGRAM

D5V

M12V

D5V

FROM KARAOKE BLOCK

(SEE PAGE 4-7)

IC201 @§ REC/PB

0.88MHz

IC201 #ª REC/PB

25Hz

IC201 #• REC/PB

600Hz

D5V

IC201 @£@¢ REC/PB

25Hz

KR SW/

CN201

7

ECHO VR

3-5 3-6

DRUM MOTOR

M901

M

HALL

DEVICE

CAPSTAN MOTOR

M902

OUTPUT

D5V

HALL

DEVICE

MATRIX

VCC

U+

VCC

UV+ VW+ W-

U

V

W

CAPSTAN

FG

MA-336 BOARD

CN204

7

1

CTL

HEAD

5

3

7 1 6

4 4

5

2

3

CAM

MOTOR

PG

FG

VM

TL

M

CAM

ENCODER

MECHA

(

POSITION

D VS

1

D PG

5

D FG

3

CN205 7 1

LIMITER

6

CTL REF

CAP VS

5

CAP RVS

2

CAP FG

3

CN401 6

5

CN203

3

1

MODE1 MODE2 MODE3 MODE4

GF90K MODEL

(SEE PAGE 3-10)

16

5Vp-p

4.1Vp-p

4Vp-p

IC201

SERVO CONTROL

26

DRUM DA

DRUM PG

39

DRUM FG

38

CAP PWM

66

96

CAP QR

25

CAP VS

55

CAP RVS

40

CAP FG

IC201 %¢ REC/PB

Q250, 251

SW

(2/3)

4Vp-p

H

(SEE PAGE 3-4)

GA77K/GF90K MODEL

(SEE PAGE 3-8)

D203

T/S LED

IC201 @∞ REC/PB

1.18MHz

IC201 $º REC/PB

758Hz

RFU801

TO/FROM

VIDEO

BLOCK

TO/FROM

AUDIO

BLOCK

IC101

12V

M12V

5Vp-p

4.6Vp-p

MOTOR DRIVE

10

CAM+

2

CAM-

4

18

,IC301

1

IC101 IC101 ,Q220 IC101

IC101 IC101 IC101 IC101

Q217

Q218 IC101 ,Q204

Q581

IC101

Q751 Q752

IC301 IC301 IC301

IC302

IC202

CAM

81 84

51

50 63 62 64

17

C

99

B B

41 42 39 40IC302

5

IC204

M12V

IN2

C

B B

B

REG

5V

GF90K MODEL

IC201 #¡ REC

IC201 #™ REC

4

RF SWP

V ENV

MESECAM DET

C SYNC V DATA

V CLOCK

SHARP 1 SHARP 2

SHARPNESS

NTSC

AMS

A MUTE

LINE 1

SDA

AF ENV

AF SWP

REC P

TAKE END

SENSOR

SUPPLY END

SENSOR

RV201 A SWP

ADJ

RV202 V SWP

ADJ

S202

REC

PROOF

25Hz

QVD

KILL

PB

SCL

IC203

RESET

PH202 T REEL

FG

PH201 S REEL

FG

Q201

Q202

3.1Vp-p

25Hz

Q203

LED

DRIVE

5V

SLV-GA30/GA40K/GA60/GA77K/GF90K

FR-140 BOARD

(3/3)

IC201

SYSTEM CONTROL

EXCEPT

10MHz

Q207-209 Q211-213

Q233

LED

DRIVE

Q221,222,226

LED

DRIVE

GA77K MODEL

POWER ON IC502

GA30

Q210

LED

DRIVE

S203

REC

3.2Vp-p

S204 PAUSE

GF90K MODEL GA30/GA40K MODEL

8

X201

10MHz

3.1Vp-p

MODE1 MODE2 MODE3 MODE4

16713

RESET

88

T REEL FG

89

S REEL FG

12

T SENS

11

S SENS

74

T/E LED

9

A SWP ADJ

8

V SWP ADJ

1

REC PRF

73

10M OUT

72

10M IN

31

CTL IN+

32

CTL IN-

95

CAM

MODE1

62

MODE2

63

MODE3

64

MODE4

65

RF SWP

24

V ENV

13

TV/VTR

80

QVD

27

C SYNC

54

V DATA

100

V CLK

99

KILL IN

19

SHARP 1

20

SHARP 2

29

SHARPNESS VR

94

NTSC

18

AMS

58 21

AU MUTE

90

PB

91

LINE 1

AF DATA

98

AF CLK

97

A ENV

14

AF SWP

23

REC P

17

POWER LED

KEY 2

KEY 4

KEY 3

ADJ-A ADJ-B

SHARP LED TRACK LED

L LED

HF LED

R LED

REC LED C IN LED

DNS 5 LED

SUR CONT 1 SUR CONT 2 SUR CONT 3

67

3KEY 1

4

86SYNC REC

6

5

92 93

82REMOCON

87 56 84 83 85

81 57

79 78DNS 4 LED 77DNS 3 LED 76DNS 2 LED 75DNS 1 LED

7DEST 2

59 60 61

IC201 &™ REC/PB

TO

KARAOKE

4

BLOCK

(SEE PAGE 3-10)

OTHER

EXCEPT GA30/GA40K MODEL

TV

LED POWERLED POWER

REMOCON

SHARPNESS LED

TRACKING LED

DNS 5 LED DNS 4 LED

CASSETTE LED

TV/VTR LED

DNS 3 LED DNS 2 LED

DNS 1 LED

SURROUND LED

S801

TV

SYSTEM

KEY 1

KEY (1)

KEY 2

KEY (2) KEY (4)

SYNC REC

KEY (4)

KEY 4

KEY (1)

KEY (2)

KEY 3

ADJ-A ADJ-B

L LED

HIFI LED

R LED

REC LED

SR-C1 SR-C2 SR-C3

CN207

4

1

33

CN210

1 2

1

3 4

5

CN208

CN201

CN208

5 4

2

3

CN206

7

6 5

13

2

3 10 11 12

9

8

CN201

14 13 15

12 11

9

8

6

5

4

CN702

CN605

4

1

TEST

CN604

1

3 4

5

CN601 11 12

14

13

CN602

7

6 5

13

2

3 10 11 12

9

8

CN601 2 3 1

4 5 7 8

SURROUND

SR-35 BOARD

(SEE PAGE 3-9)

FR-141 BOARD

GA77K MODEL

TO

BLOCK CN701

(SEE PAGE 4-23)

Q601

POWER

ON

Q602

POWER

ON

S601

ON

STANDBY

(SEE PAGE 4-24)

S606 STOP

S609

REW

S603

VIRTUAL

SOUND

S611 AUTO/

MANUAL

S607 PLAY

IC601

REMOTE

CONTROL

RECEIVER

S602 EJECT

D601

21

S612

ON SCREEN

DISPLAY

+5V

EXCEPT GA30/GA40K MODEL

S608

FF

D603-607

D608 D609

D610-612

D613 D614

D615,616

S620 SYNC

REC

+5V

D602

GA77K/GF90K MODEL

LINE 1

LINE 2

AUTO

PAL/MESECAM

NTSC

NTSC 3.58

NTSC 4.43

ON PAL TV

EXCEPT GA30/GA40K MODEL

GF90K MODEL GA30/GA40K MODEL GA77K MODEL

FR-142 BOARD

S615

LINE

SELECT

S605

COLOR

SYSTEM

S610 NTSC

PB

EP

SP

S613

PICTURE

CONTROL

(SEE PAGE 4-21)

S614

SP/EP

Sony SLVGA-40-K Service manual

TABLE OF CONTENTS

3-1. OVERALL BLOCK DIAGRAM

3-2. VIDEO BLOCK DIAGRAM

3-3. SERVO/SYSTEM CONTROL BLOCK DIAGRAM