SLV-E820B, SLV-E820BZ, SLV-E820NP, SLV-E820UX, SLV-E820VC, SLV-E870EG, SLV-E920B, SLV-E920EG, SLV-E920NP, SLV-E920UX, SLV-E920VC, SLV-E930B, SLV-E930NP, SLV-E930UX, SLV-E930VC - Sony VCR Service Manual (repair manual). Page 4

Section

Title

Page

Feature Difference .................................................................... 2

1.

GENERAL

Getting Started ............................................................... 1-1
Basic Operations ............................................................ 1-9
Additional Operations ..................................................... 1-12
Editing ............................................................................. 1-15
Additional Information ..................................................... 1-18

2.

DISASSEMBLY

2-1.

Front Panel Assembly and Case Removal
(E820) ............................................................................. 2-1

2-2.

Front Panel Assembly and Case Removal (E870/E920) 2-1

2-3.

Control switch Block Removal (E870/E920) ................... 2-1

2-4.

DM-62/FR-119 Boards Removal .................................... 2-1

2-5.

RP-217 Board Removal ................................................. 2-2

2-6.

PP-15 Board Removal (E920) ........................................ 2-2

2-7.

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

2-8.

PS-385/MA-287/AL-11 Boards Removal ....................... 2-2

2-9.

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

2-10. Circuit Boards Location .................................................. 2-4

3.

BLOCK  DIAGRAMS

3-1.

Overall Block Diagram .................................................... 3-1

3-2.

Video Block Diagram ...................................................... 3-4

3-3.

Servo/System Control Block Diagram ............................ 3-9

3-4.

I/O, C+, PAL PLUS Block Diagram ................................. 3-11

3-5.

Audio Block Diagram ...................................................... 3-13

3-6.

Tuner Block Diagram ...................................................... 3-15

3-7.

Mode Control Block Diagram ......................................... 3-19

3-8.

Power Block Diagram ..................................................... 3-21

4.

PRINTED  WIRING  BOARDS  AND
SCHEMATIC  DIAGRAMS

4-1.

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

4-2.

Printed Wiring Boards and Schematic Diagrams ........... 4-4
RP-217 Printed Wiring Board ......................................... 4-5
RP-217 Schematic Diagram ........................................... 4-7
MA-287 Printed Wiring Board ........................................ 4-10
MA-287 (Video, Audio) Schematic Diagram ................... 4-13
MA-287 (Servo/System Control) Schematic Diagram .... 4-18
MA-287 (IN/OUT) Schematic Diagram ........................... 4-23
MA-287 (Tuner) Schematic Diagram .............................. 4-26
PP-15 Printed Wiring Board and Schematic Diagram .... 4-29
AL-11 Printed Wiring Board and Schematic Diagram .... 4-31
DM-62, FR-119, JK-152 Schematic Diagram ................ 4-33
DM-62, FR-119, JK-152 Printed Wiring Board ............... 4-37
PS-385 Printed Wiring Board ......................................... 4-39
PS-385 Schematic Diagram ........................................... 4-41

Section

Title

Page

5.

INTERFACE,  IC  PIN  FUNCTION  DESCRIPTION

5-1.

System Control-Video Block Interface
(MA-287 board IC160) .................................................... 5-1

5-2.

System Control-Servo Peripheral Circuit Interface
(MA-287 board IC160) .................................................... 5-2

5-3.

System Control-Mechanism Interface
(MA-287 board IC160) .................................................... 5-3

5-4.

System Control-System control Peripheral circuit
Interface (MA-287 board IC160) ..................................... 5-4

5-5.

System Control-Audio Block Interface
(MA-287 board IC160) .................................................... 5-4

5-6.

Servo System Control Microprocessor Pin Function
(MA-287 board IC160) .................................................... 5-5

5-7.

Tuner/Timer Mode Control Pin Function
(FR-119 board IC470) .................................................... 5-6

5-8.

CME Pin Function (AL-11 board IC800) ........................ 5-7

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

2-1-5.

Specified I/O Level and Impedance .......................... 6-2

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 .............................................. 6-3

2-3-1.

Switching Position Adjustment .................................. 6-3

2-4.

Video System Adjustment .............................................. 6-3

2-4-1.

Recording Y Signal Level Check ............................... 6-3

2-4-2.

White Clip, Dark Clip Check ...................................... 6-4

2-4-3.

Playback Y signal Level Check .................................. 6-4

2-4-4.

Recording Chroma Level Check ............................... 6-4

2-4-5.

Sync. AGC Check ..................................................... 6-4

2-4-6.

X’tal Oscillation Frequency Check ............................ 6-5

2-5.

Audio System Adjustment .............................................. 6-5

2-5-1.

Hi-Fi Audio System Adjustment ................................ 6-5

1.

AF Switching Position Adjustment ............................ 6-5

2-5-2.

Normal Audio System Adjustment ............................ 6-6

1.

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

2.

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

3.

Recording Bias Adjustment ....................................... 6-6

4.

Overall Level Characteristic and Distortion
Factor Check ............................................................. 6-6

5.

Overall S/N Check ..................................................... 6-6

2-6.

Parts Arrangement Diagram for Adjustments ................ 6-8

7.

REPAIR  PARTS  LIST

7-1.

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

7-1-1.

Front Panel and Cabinet Assemblies
(E820) ........................................................................ 7-1

7-1-2.

Front Panel and Cabinet Assemblies
(E870EG/E920) ......................................................... 7-2

7-1-3.

Chassis Assembly ..................................................... 7-3

7-1-4.

Mechanism Chassis Assembly (1) ............................ 7-4

7-1-5.

Mechanism Chassis Assembly (2) ............................ 7-5

7-1-6.

Mechanism Chassis Assembly (3) ............................ 7-6

7-1-7.

Mechanism Chassis Assembly (4) ............................ 7-7

7-2.

Electrical Parts List ......................................................... 7-8