SLV-ED1ME, SLV-ED1PS, SLV-ED1SG, SLV-ED2SA, SLV-ED3AF, SLV-ED4ME, SLV-ED4PS, SLV-ED4SG, SLV-ED5ME, SLV-ED6ME, SLV-ED6PS, SLV-ED6SG, SLV-ED7FS, SLV-ED7MI, SLV-ED7MN, SLV-EZ1AZ, SLV-EZ4AZ, SLV-EZ7AS, SLV-EZ7NZ - Sony VCR Service Manual (repair manual). Page 4

Section

Title

Page

Section

Title

Page

Feature Difference ................................................................... 3
SERVICE NOTE ...................................................................... 5

1.

GENERAL

Getting Started .............................................................. 1-1
Basic Operations ........................................................... 1-4
Additional Operations .................................................... 1-8
Editing ............................................................................ 1-9
Additional Information ................................................... 1-10

2.

DISASSEMBLY

2-1.

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

2-2.

NK-11, RJ-80, SE-73 Board Removal .......................... 2-1

2-3.

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

2-4.

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

2-5.

Power Block Removal ................................................... 2-2

2-6.

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

2-7.

MA-323 Board Removal ................................................ 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.

Servo/System Control Block Diagram .......................... 3-3

3-3.

Video Block Diagram ..................................................... 3-5

3-4.

Audio Block Diagram ..................................................... 3-9

3-5.

Tuner Block Diagram ..................................................... 3-11

3-6.

Mode Control Block Diagram ........................................ 3-13

3-7.

Power Block Diagram .................................................... 3-15

4.

PRINTED  WIRING  BOARDS  AND
SCHEMATIC  DIAGRAMS

4-1.

Frame Schematic Diagram ........................................... 4-1

4-2.

Printed Wiring Boards and Schematic Diagrams ......... 4-4
MA-323 Printed Wiring Board ....................................... 4-5
MA-323 (Head Amp) Schematic Diagram .................... 4-7
MA-323 (Video, Audio) Schematic Diagram ................. 4-11
MA-323 (System Control) Schematic Diagram ............ 4-15
MA-323 (Servo Control) Schematic Diagram ............... 4-18
MA-323 (Hi-Fi Audio) Schematic Diagram .................... 4-21
MA-323 (IO) Schematic Diagram .................................. 4-23
MA-323 (Tuner) Schematic Diagram ............................ 4-25
MA-323 (Mode Control) Schematic Diagram ............... 4-27
MA-323 (FL Driver) Schematic Diagram ....................... 4-29
MA-323 (Power Supply) Schematic Diagram ............... 4-31
SE-73 Printed Wiring Board and
Schematic Diagram ....................................................... 4-33
DS-80, NK-11 Printed wiring Board and
Schematic Diagram ....................................................... 4-36
DM-76, MF-312, RJ-80
Printed Wiring Board and Schematic Diagram ............. 4-39
HS-921SF/921SF1 Schematic Diagram ....................... 4-43
HS-921SF/921SF1, SR-708/718
Printed Wiring Board ..................................................... 4-45
SR-708/718 Schematic Diagram .................................. 4-47

5.

INTERFACE,  IC  PIN  FUNCTION  DESCRIPTION

5-1.

System Control-Video Block Interface
(MA-323 board IC161) .................................................. 5-1

5-2.

System Control-Servo Peripheral Circuit Interface

(MA-323 board IC161) .................................................. 5-1

5-3.

System Control-Mechanism Interface
(MA-323 board IC161) .................................................. 5-2

5-4.

System Control-Audio Block Interface
(MA-323 board IC161) .................................................. 5-3

5-5.

Servo/System/Tuner/Timer Control Microprocessor
Pin Function (MA-323 board IC161) ............................. 5-4

5-6.

NICAM Processor Pin Function (NK-11 board IC1) ..... 5-5

6.

ERROR  CODE

.......................................................... 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 Tape ......................................................... 7-1
2-1-5. Specified I/O Level and Impedance ......................... 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. 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 Responce Check .................................... 7-4

4.

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

5.

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

2-5.

Parts Arrangement Diagram for Adjustments ............... 7-6

8.

REPAIR  PARTS  LIST

8-1.

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

8-1-1. Front Panel and Cabinet Assemblies

(ED1/ED2/EZ1) ........................................................ 8-1

8-1-2. Chassis Assembly (ED1/ED2/EZ1) .......................... 8-2
8-1-3. Front panel and Cabinet Assemblies

(Except ED1/ED2/EZ1) ............................................ 8-3

8-1-4. Chassis Assembly (Except ED1/ED2/EZ1) ............. 8-5
8-1-5. Mechanism Chassis Assembly (1) ........................... 8-6
8-1-6. Mechanism Chassis Assembly (2) ........................... 8-7
8-1-7. Mechanism Chassis Assembly (3) ........................... 8-8

8-2.

Electrical Parts List ........................................................ 8-9