Sony SLV-GA30, SLV-GA50, SLV-GA66 Service Manual

SLV-GA30/GA50/GA66/GA70K/GA77K/

GF80/GF90K/GF99K/P66/PH99

RMT-V254/V254A

SERVICE MANUAL

Ver 1.0 1998.10

Photo: SLV-GF99K

RMT-V254

S MECHANISM

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

for

SPECIFICATIONS

East European Model

SLV-P66/PH99

ME Model

SLV-GA30/GA50/GA66/GF99K

Philippine Model

SLV-GA77K/GF99K

E Model

SLV-GA30/GA50/GA70K/

GA77K/GF80/GF90K/GF99K

Thai Model

SLV-GA30/GA50/GA70K/

GA77K/GF80/GF90K/GF99K

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 —

MODEL (SLV-) GA30 GA50 P66 GA66 GA70K

FEATURES ME SG PS TK ME SG PS TK EE ME PS TK

NTSC 3.58 REC/PB X/X O/O O/O O/O O/O

NTSC 4.43 REC/PB X/O O/O O/O O/O O/O

PAL REC/PB X/O O/O O/O O/O O/O

MESECAM REC/PB X/O O/O O/O O/O O/O

NTSC PB ON PAL TV OOOOO

REC MODE NTSC X SP/EP SP SP SP/EP SP

PAL X SP/LP SP SP SP/LP SP

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

PAL SP/LP SP SP/LP SP SP SP/LP SP

AUDIO SYSTEM MONO MONO MONO MONO MONO

KARAOKE X X X X O

KARAOKE PON X X X X X

SOUNDS IN STEREO XXXXX

SURROUND X X X O X

TAPE SPEED O X O X X O X

LINE IN (RCA PINS) FRONT X X X 3 X

REAR X 2 2 3 2

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

REAR 2 2 2 3 2

RF IN/OUT GK GK GK GK GK

REMOTE COMMANDER RMT-V254A RMT-V254 RMT-V254 RMT-V254 RMT-V254

MODEL (SLV-) GA77K GF80 PH99 GF90K GF99K

FEATURES PS TK PL PS TK EE PS TK ME PS TK PL

NTSC 3.58 REC/PB O/O O/O O/O O/O O/O

NTSC 4.43 REC/PB O/O X/X O/O O/O O/O O/O X/X

PAL REC/PB O/O X/X O/O O/O O/O O/O X/X

MESECAM REC/PB O/O X/X O/O O/O O/O O/O X/X

NTSC PB ON PAL TV OXOOO O X

REC MODE NTSC SP SP SP SP SP SP/EP

PAL SP X SP SP SP SP X

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

PAL SP X SP SP SP SP X

AUDIO SYSTEM MONO Hi-Fi Hi-Fi Hi-Fi Hi-Fi

KARAOKE O X X O O

KARAOKE PON O X X O O

SOUNDS IN STEREO XXXX O

SURROUND O X X X O

TAPE SPEED X O X X X X O

LINE IN (RCA PINS) FRONT 3 3 3 3 3

REAR 3 3 3 3 3

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

REAR 3 3 3 3 3

RF IN/OUT GK USA GK GK GK GK USA

REMOTE COMMANDER RMT-V254 RMT-V254 RMT-V254 RMT-V254 RMT-V254

Abbreviation

SG: Gulf Model EE: East European Model PS: Pan Asia Model PL: Philippine Model TK: Thai Model

— 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 Enjoying the surround sound (Virtual Surround)

(SLV-GF-99KME/PS only) ·············································1-5 Adjusting the picture (Resolution Control) ······························· 1-5 Editing with another VCR ·························································1-6 Synchronised recording ·····························································1-6 Troubleshooting·········································································1-7 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

5-2. 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

5. INTERFACE, IC PIN FUNCTION DESCRIPTION

5-1. System Control — Video Block Interface

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

— 4 —

SLV-GA30/GA50/GA66/GA70K/GA77K/GF80/GF90K/GF99K/P66/PH99

SECTION 1

GENERAL

This section is extracted from instruction manual.(SLV-GF90K/GF99K model)

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8E

SLV-GA30/GA50/GA66/GA70K/GA77K/GF80/GF90K/GF99K/P66/PH99

w

SECTION 2

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

3

Upper case

4

(From CN206 on MA-336 board)

2

T apping scre

Flat cable

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

— T op View —

FE head 1-500-144-11

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

M901 Drum Assembly

DZH-78A-R 1-759-183-11 (GA30:PS,TK/GA50:PS,TK/GA70K:PS,TK/GA77K:PS,TK/P66) DZH-91A-R 1-759-449-11 (GF80:PS,TK/GF90K:PS,TK/GF99K:ME,PS,TK/PH99) DZH-90A-R 1-759-451-11 (GF99K:PL) DZH-89A-R 1-759-453-11 (GA30:SG,ME/GA50:SG,ME/GA66:ME) DZH-71D-R 1-759-455-11 (GA77K:PL)

Abbreviation

SG: Gulf Model EE: East European Model PS: Pan Asia Model PL: Philippine Model TK: Thai Model

ACE head block assembly A-6759-620-A

Pinch press block assembly 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) [GA70K/GA77K/GF90K/GF99K]

FR-140 (POWER, EJECT SWITCHES)

JK-166 (LINE IN/OUT) [GA66/GA77K/GF80/ GF90K/GF99K/PH99]

FR-142 (MODE CONTROL)

FR-141 (TAPE OPERATION)

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

SR-35 (SURROUND) [GA66/GA77K/GF99K]

2-5E

3-1. OVERALL BLOCK DIAGRAM

SECTION 3

SLV-GA30/GA50/GA66/GA70K/GA77K/GF80/GF90K/GF99K/P66/PH99

BLOCK DIAGRAMS

VIDEO HEAD

SP

CH1

SP

CH1

CNJ801

VIDEO

LINE IN 1

GA66/GA77K

GF80/GF90K/GF99K/PH99 MODEL

CNJ651

VIDEO

LINE IN 2

AUDIO HEAD

CH1

CH2

AFM

REC/PB

HEAD

ERASE

HEAD

FULL

ERASE

HEAD

CNJ801

L

AUDIO

LINE IN 1

GF80/GF90K/GF99K/PH99

R

CNJ651

L

AUDIO

LINE IN 1

R

GA66/GA70K/GA77K

MCJ501

1

MIC IN

MCJ502

2

GA70K/GA77K/GF90K/GF99K

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

(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

AF SWP REC P

EXCEPT

GA30

Q405,406

BIAS OSC

JS921

JS922

GA66/GA77K

(SEE PAGE 4-25)

MIC 1

MIC 2

(SEE PAGE 4-21)

FR-142 BOARD

16

(1/2)

IC101

VIDEO

REC/PB AMP

Y/C PROC.

MESECAM

V DATA / V CLK QVD V ENV CSYNC

GF80/GF90K/GF99K/PH99 MODEL

IC301

AUDIO

PROCESSOR

(HIFI)

L1R1L2

R2

AF ENV

SDA/SCL

IC501

S501

KARAOKE

ECHO

L1

R1

RF

NA IN NA OUT

GF90K /GF99K

JS901

GA50/GA70K/P66

MODEL

IC751

INPUT

SELECTOR

GA66/GA77K

GF90K/GF99K MODEL

MIC

KARAOKE PON

KR SW/ECHO VR

IC201

OSD

Q224,225

GA77K:PL/GF99K:PL

JS929

(1/2)

EXCEPT

GA66/ GA77K

JS930

IC752

GA66/GA77K MODEL

GF90K/GF99K

JS931

JS932

GF80/PH99

GA30/GA50/GA66/P66

(2/2)

IC101

AUDIO

PROCESSOR

(NORMAL)

GA40K/GA70K/GA77K

GF90K/GF99K MODEL

JS903 JS902 JS910

GA30/GA50/ GA70K/P66

IC752

AMS

GF80/GF90K/PH99

JS904

JS905

GA30/GA66/ GF90K/P66

GA66/GA77K/GF99K MODEL

GA30/GA50/ GA66/GF80/ P66/PH99

JS908

JS909

GA66/GF80/PH99

JS906

JS907

GA66/GF90K

GA66 MODEL

JS701 JS702

IC701

VOCAL

CANCEL

GA77K/GF99K MODEL

Q801 BUFF

(SEE PAGE 4-26)

EXCEPT GF80/GF90K/ GF99K/PH99

JS927

JS928

GA66/GA77K

SR-35 BOARD

(SEE PAGE 4-17)

JK-166 BOARD

EXCEPT

GA30 MODEL

CNJ651

L

R

GA66/GA77K/GF99K MODEL

L

R

RFU801

VIDEO TV/VTR AUDIO

GA70K/GA77K

GF90K/GF99K MODEL

IC502

IC702 IC503

SURR(A)

IC703

SS/

SURR(B)

GF90K/GF99K

JS925

JS926

KARAOKE

PROC.

/SRAM

CNJ801

VIDEO

LINE OUT1

VIDEO

LINE OUT2

AUDIO

LINE OUT2

LINE OUT1

IN

OUT

CNJ801

AUDIO

PH202 T REEL

FG PH201 S REEL

FG

Q201

T

SENS Q202

S

SENS

IC203

RESET

SIGNAL

CONTROL

MESECAM

V DATA / V CLK

QVD V ENV CSYNC

AMS

SDA / SCL

AF ENV AF SWP REC P

T REEL

S REEL

T SENS

S SENS

TE/LED

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

GF80/GF90K /GF99K/PH99

GA77K:PL/GF99K:PL

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

GA66

GA77K/GF99K

S611-614 FUNCTION

KEY

IC601

REMOTE CONTROL RECEIVER

CTL

HEAD

CAM

EXCEPT GA77K:PL/GF99K:PL

D601

FR-140 BOARD

(SEE PAGE 4-23)

EXCEPT

GA30 MODEL

D602

(SEE PAGE 4-24)

GA66/GA77K/GF80/

GF90K/GF99K/PH99

D603-607

D608 D609

D610-612

D613 D614

D615,616

FR-141 BOARD

S610 NTSC

PB

EXCEPT

GA77K:PL/GF99K:PL

S605

COLOR

SYSTEM

EXCEPT

GA77K:PL/GF99K:PL

EXCEPT GA30

GF80/GF90K/GF99K/PH99 GA30:PL/GA40K/GA77K:PL/GF99K:PL GA66/GA77K/GF99K MODEL

FR-142 BOARD

(SEE PAGE 3-21)

3-1 3-2

SLV-GA30/GA50/GA66/GA70K/GA77K/GF80/GF90K/GF99K/P66/PH99

3-2. VIDEO BLOCK DIAGRAM

CN101 3 REC/PB

1

(SEE PAGE 4-5)

CN202

1

16

Q102 BUFF

SP1

SP2

31

30

28

DRUM FF

SW30

VCA

ATT

(-10dB)

ATT

(-10dB)

ATT

(-10dB)

IC101 &¡ REC/PB

3.579545MHz

IC101 &∞ REC/PB

4.433619MHz

IC101 &£ REC/PB

SW29

SP SP

REC

MUTE

4.433619MHz

0.54Vp-p

IC101

VIDEO

REC/PB AMP

79 7881

Y/C PROCESSOR

HPF

DET

ENV

97

84

SW28

REC

MUTE

SW20

P R

ACC

SW27

SW19

SEP COMP

HPF

LPF

PR

SW7

629

TRAP

FM

AGC

2FL

VCO

4 PHASE

GEN

1/2

P EQ

SW8

MMS

DL

G EQ DLIM DEMO

1M

HPF7MLPF

CR DET

2fSC

REC APC

APC

REC AFC

PB

0.1Vp-p

VIDEO

AGC

X-TAL

VCO/OSC

76717375

X101

X102

4.43MHz

3.58MHz

GA77K:PL/GF99K:PL MODEL

EXCEPT

Q101Q101

0.66Vp-p

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

CNJ651

VIDEO

IN 2

(SEE PAGE 4-26)

MA-336 BOARD

CN101

V SW P

3

PB RF

2

CN102

6

5

2

1

V IN2

89

88

86

87

CN651

JK-166

BOARD

GA66/GA77K

GF80/GF90K/GF99K/PH99

MODEL

CNJ801

VIDEO

IN 1

CTL TRAP

LPF

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 13 80 27

EXCEPT GA77K:PL/ GF99K:PL

Q215,216

BUFF

Q205,214

2fSC

AMP

IC101 #∞ REC/PB

H

IC101 $§ REC/PB

H

IC101 ^º REC/PB

H

IC101 $™ REC/PB

H

IC101 %º REC/PB

C SYNC IC201

TO/FROM

SYSCON

BLOCK

(SEE PAGE 3-5)

Q224,225

IC201

OSD

43

52 53

IC201 %£ REC/PB

8.86716MHz

REC:0.41Vp-p

PB:0.6Vp-p

REC:0.28Vp-p

PB:0.35Vp-p

REC:0.28Vp-p

PB:0.35Vp-p

IC101 $¢ REC/PB

8.8671MHz

REC:0.35Vp-p

PB:0.38Vp-p

4.6Vp-p

H

(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

GA66/GA77K/GF99K

MODEL

RFU801

2

AUDIO

4

TV/VTR

1

VIDEO

CNJ801

VIDEO OUT 1

CNJ652

VIDEO OUT 2

IN

OUT

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

16

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/GF99K

(SEE PAGE 3-10)

1

CTL

HEAD

5

3

7 1 6

4 4

5

2

3

CAM

MOTOR

PG

FG

VM

TL

M

CAM

ENCODER

MECHA

(

POSITION

5Vp-p

4.1Vp-p

4Vp-p

IC201

SERVO CONTROL

26

DRUM DA

39

DRUM PG

38

DRUM FG

66

CAP PWM

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)

GA70K/GA77K GF90K/GF99K 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

12V

IC101

M12V

GF80/GF90K/GF99K

5Vp-p

4.6Vp-p

IC202

CAM

MOTOR DRIVE

10

CAM+

2

CAM-

IC101 IC101 ,Q220

4

IC101

IC101 IC101 IC101 IC101

Q217

Q218 IC101 ,Q204

18

Q581 IC101

Q751 Q752

IC301 IC301 IC301

,IC301

1

IC302

/PH99

99

41 42 39 40IC302

IN2

81 84

C

51

50 63 62 64

B B

17

B

C

B B

5

IC204

5V

REG

M12V

IC201 #¡ REC

4

MESECAM DET

SHARPNESS

S202

REC

PROOF

25Hz

IC201 #™ REC

RF SWP

V ENV

QVD

C SYNC V DATA

V CLOCK

KILL

SHARP 1 SHARP 2

NTSC

AMS

A MUTE

PB

LINE 1

SDA SCL

AF ENV

AF SWP

REC P

IC203

RESET

PH202 T REEL

FG

PH201 S REEL

FG

Q201

TAKE END

SENSOR

Q202

SUPPLY END

SENSOR

RV201 A SWP

ADJ

RV202 V SWP

ADJ

25Hz

DRIVE

3.1Vp-p

Q203

LED

SLV-GA30/GA50/GA66/GA70K/GA77K/GF80/GF90K/GF99K/P66/PH99

Q601

POWER

ON

Q602

POWER

ON

S601

ON

STANDBY

(SEE PAGE 4-24)

S606 STOP

S609

REW

S603

VIRTUAL

SOUND

GA66

/GA77K/GF99K

S611 AUTO/

MANUAL

IC601

REMOTE

CONTROL

RECEIVER

(SEE PAGE 4-23)

D601

GA77K:PL/GF99K:PL

S602 EJECT

S607 PLAY

S608

FF

GA66/GA77K/GF80/GF90K/GF99K/PH99

S612

ON SCREEN

DISPLAY

+5V

21

D603-607

D608 D609

D610-612

D613 D614

D615,616

EXCEPT MODEL

GA30

EXCEPT

S620 SYNC

REC

+5V

D602

LINE 1

LINE 2

AUTO

PAL/MESECAM

NTSC

NTSC 3.58

NTSC 4.43

ON PAL TV

EXCEPT GA77K:PL/GF99K:PL

S615

LINE

SELECT

S605

COLOR

SYSTEM

S610 NTSC

PB

S613

PICTURE

CONTROL

EXCEPT GA30

GF80/GF90K/GF99K/PH99 GA77K:PL/GF99K:PL GA66/GA77K/GF99K

FR-142 BOARD

(SEE PAGE 4-21)

EP

S614

SP/EP

SP

FR-140 BOARD

(3/3)

IC201

SYSTEM CONTROL

8

5V

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

POWER ON IC502

EXCEPT

Q210

LED

DRIVE

10MHz

Q207-209 Q211-213

Q233

LED

DRIVE

Q221,222,226

LED

DRIVE

GA66/GA77K/GF99K

GA30

S203

REC

3.2Vp-p

S204

PAUSE

GF80/GF90K/GF99K/PH99 MODEL

GA77K:PL/GF99K:PL MODEL

TO

KARAOKE

4

BLOCK

(SEE PAGE 3-10)

SHARPNESS LED

SURROUND LED

S801

OTHER

TV

SYSTEM

TV

GA30

EXCEPT

LED POWERLED POWER

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

REMOCON

TRACKING LED

L LED

HIFI LED

R LED DNS 5 LED DNS 4 LED

REC LED

CASSETTE LED

TV/VTR LED

DNS 3 LED DNS 2 LED

DNS 1 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

TO

BLOCK CN701

Sony SLV-GA30, SLV-GA50, SLV-GA66 Service Manual

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

3-1. OVERALL BLOCK DIAGRAM

BLOCK DIAGRAMS

3-2. VIDEO BLOCK DIAGRAM

3-3. SERVO/SYSTEM CONTROL BLOCK DIAGRAM