SLV-ED22KR, SLV-ED22PL, SLV-ED22TW, SLV-ED55KR, SLV-ED55PL, SLV-ED88TW, SLV-ED99KR, SLV-ED99PL, SLV-ED99TW - Sony VCR Service Manual (repair manual). Page 3

Section

Title

Page

Section

Title

Page

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

1.

GENERAL

Getting Started .............................................................. 1-1
Basic Operations ........................................................... 1-5
Additional Operations .................................................... 1-8
Editing ............................................................................ 1-12
Additional Information ................................................... 1-13

2.

DISASSEMBLY

2-1.

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

2-2.

Rear Panel Removal ..................................................... 2-1

2-3.

PSM17-501 Board Removal ......................................... 2-1

2-4.

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

2-5.

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

2-6.

MA-377 Board Removal ................................................ 2-2

2-7.

RF-048 Board Removal (ED22TW/ED88/ED99TW) .... 2-2

2-8.

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

2-9.

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.

Tuner Block Diagram ..................................................... 3-9

3-6.

Mode Control Block Diagram ........................................ 3-11

3-7.

Power Block Diagram .................................................... 3-13

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-377 Printed Wiring Board ....................................... 4-5
MA-377 (Video, Audio) Schematic Diagram ................. 4-9
MA-377 (System Control) Schematic Diagram ............ 4-13
MA-377 (Servo Control) Schematic Diagram ............... 4-15
MA-377 (Hi-Fi Audio) Schematic Diagram .................... 4-17
MA-377 (Tuner) Schematic Diagram ............................ 4-19
MA-377 (I/O) Schematic Diagram ................................. 4-21
MA-377 (Mode Control) Schematic Diagram ................ 4-23
GK-12 Printed Wiring Board and
Schematic Diagram ....................................................... 4-25
RF-048 Printed Wiring Board and
Schematic Diagram ....................................................... 4-27
FJ-26, MF-321 Printed Wiring Boards and
Schematic Diagrams ..................................................... 4-29
DS-92, KK-24 Printed Wiring Boards and
Schematic Diagrams ..................................................... 4-31
PSM17-501 Printed Wiring Board ................................. 4-33
PSM17-501 Schematic Diagram ................................... 4-35

5.

INTERFACE,  IC  PIN  FUNCTION  DESCRIPTION

5-1.

System Control-Video Block Interface
(MA-377 BOARD IC101) ............................................... 5-1

5-2.

System Control-Servo Peripheral Circuit Interface
(MA-377 BOARD IC101) ............................................... 5-1

5-3.

System Control-Mechanism Block Interface
(MA-377 BOARD IC101) ............................................... 5-2

5-4.

System Control-Audio Block Interface
(MA-377 BOARD IC101) ............................................... 5-3

5-5.

Servo/System Control,
OSD Microprocessor Pin Function
(MA-377 BOARD IC101) ............................................... 5-4

5-6.

ZWEITON Processor Pin Function
(GK-12 BOARD IC001) ................................................. 5-5

6.

ERROR  CODES

....................................................... 6-1

7.

ADJUSTMENTS

7-1.

Mechanical Adjustments ............................................... 7-1

7-2.

Electrical Adjustments ................................................... 7-1

2-1.

Pre-Adjustment Preparations ........................................ 7-1

2-1-1. Instruments to be Used ............................................ 7-1
2-1-2. Connection ............................................................... 7-1
2-1-3. Set-up of Adjustment ............................................... 7-1
2-1-4. Alignment Tapes ....................................................... 7-1
2-1-5. Specified I/O Level and Impedance

Input/Output terminal ............................................... 7-1

2-1-6. Adjusting Sequence ................................................. 7-2

2-2.

Power Supply Adjustment ............................................. 7-2

2-2-1. Power Supply Check ................................................ 7-2

2-3.

Servo System Adjustment ............................................. 7-2

2-3-1. RF Switching Position Adjustment ........................... 7-2

2-4.

Audio System Adjustments ........................................... 7-3

2-4-1. Hi-Fi Audio System Adjustment ............................... 7-3
1.

AF Switching Position Adjustment ........................... 7-3

2.

Frequency Response Check .................................... 7-3

3.

Overall Level Characteristic and
Distortion Factor Check ........................................... 7-4

4.

Overall S/N Check .................................................... 7-4

2-4-2. Normal Audio System Adjustment ........................... 7-4
1.

ACE Head Adjustment ............................................. 7-4

2.

E-E Output Level Check ........................................... 7-4

3.

Frequency Response Check .................................... 7-4

4.

Overall Level Characteristic and Distortion
Factor Check ............................................................ 7-5

5.

Overall S/N Check .................................................... 7-5

2-5.

Tuner System Adjustment ............................................. 7-5

2-5-1. Separation Adjustment ............................................. 7-5

2-6.

Par ts Arrangement Diagram for Adjustments ............... 7-6

8.

REPAIR  PARTS  LIST

8-1.

Exploded Views ............................................................. 8-1

8-1-1. Front Panel and Cabinet Assemblies ....................... 8-1
8-1-2. Chassis Assembly .................................................... 8-2
8-1-3. Mechanism Chassis Assembly (1) ........................... 8-3
8-1-4. Mechanism Chassis Assembly (2) ........................... 8-4
8-1-5. Mechanism Chassis Assembly (3) ........................... 8-5

8-2.

Electrical Parts List ....................................................... 8-6