SLV-KS1 - Sony VCR Service Manual (repair manual). Page 3

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Section

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SERVICE NOTE ...................................................................... 4

1.

GENERAL

Play Timer ...................................................................... 1-1
Cassette Door Lock (Safety Lock) ................................ 1-1
Recording and Tape Speed Buttons ............................. 1-1
Connections .................................................................. 1-2

2.

DISASSEMBLY

2-1.

Upper Case Removal .................................................... 2-1

2-2.

Front Panel Section Removal ....................................... 2-1

2-3.

Rear Panel (M) Removal .............................................. 2-1

2-4.

Mechanism Deck Removal ........................................... 2-1

2-5.

MA-370 Board Removal ................................................ 2-2

2-6.

Internal Views ................................................................ 2-3

2-7.

Circuit Boards Location ................................................. 2-4

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.

Power Block Diagram .................................................... 3-9

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-370 Printed Wiring Board ....................................... 4-5
MA-370 (Head Amp) Schematic Diagram .................... 4-7
MA-370 (Video, Audio) Schematic Diagram ................. 4-9
MA-370 (Servo/System Control)
Schematic Diagram ....................................................... 4-13
MA-370/QP-1 (Kids Sound) Printed Wiring Board
and Schematic Diagram ................................................ 4-17
MA-370 (Mode Control) Schematic Diagram ............... 4-19
MA-370 (Power Supply) Schematic Diagram ............... 4-21

5.

INTERFACE,  IC  PIN  FUNCTION  DESCRIPTION

5-1.

System Control-Video/RP Block Interface
(MA-370 BOARD IC160) ............................................... 5-1

5-2.

System Control-Servo Peripheral Circuit Interface
(MA-370 BOARD IC160) ............................................... 5-1

5-3.

System Control-Mechanism Block Interface
(MA-370 BOARD IC160) ............................................... 5-2

5-4.

System Control-System Control Peripheral
Circuit Interface (MA-370 BOARD IC160) .................... 5-3

5-5.

System Control-Audio Block Interface
(MA-370 BOARD IC160) ............................................... 5-3

5-6.

Servo/System Control Microprocessor Pin Function
(MA-370 BOARD IC160) ............................................... 5-4

6.

ADJUSTMENTS

6-1.

Mechanical Adjustments ............................................... 6-1

6-2.

Electrical Adjustments ................................................... 6-1

2-1.

Pre-Adjustment Preparations ........................................ 6-1

2-1-1. Instruments to be Used ............................................ 6-1
2-1-2. Connection ............................................................... 6-1
2-1-3. Set-up of Adjustment ................................................ 6-1
2-1-4. Alignment Tapes ....................................................... 6-1
2-1-5. Specified I/O Level and Impedance

input/output terminal ................................................ 6-1

2-1-6. Adjusting Sequence ................................................. 6-2

2-2.

Power Supply Adjustment ............................................. 6-2

2-2-1. Power Supply Check ................................................ 6-2

2-3.

Servo System Adjustment ............................................. 6-2

2-3-1. RF Switching Position Adjustment ........................... 6-2

2-4.

Audio System Adjustments ........................................... 6-3

2-4-1. Normal Audio System Adjustment ........................... 6-3
1.

ACE Head Adjustment .................................................. 6-3

2.

E-E Output Level Check ............................................... 6-3

3.

Frequency Response Check ......................................... 6-3

2-5.

Parts Arrangement Diagram for Adjustments ............... 6-4

7.

REPAIR  PARTS  LIST

7-1.

Exploded Views ............................................................. 7-1

7-1-1. Front Panel and Chassis Assembly ......................... 7-1
7-1-2. Mechanism Chassis Assembly (1) ........................... 7-2
7-1-3. Mechanism Chassis Assembly (2) ........................... 7-3
7-1-4. Mechanism Chassis Assembly (3) ........................... 7-4

7-2.

Electrical Parts List ........................................................ 7-5