Sony SLV-GA30, Service Manual

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TABLE OF CONTENTS
1. GENERAL
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 Views ·································································· 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 Views ······························································· 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