SLV-KA177PK, SLV-KA177PL, SLV-KA200PL, SLV-KF300PL, SLV-XA127PK, SLV-XA127PL, SLV-XF247PL - Sony VCR Service Manual (repair manual). Page 3

Section

Title

Page

Feature Difference .................................................................... 2
Service Note ............................................................................. 4

1.

GENERAL

Getting Started ............................................................... 1-1
Basic Operations ............................................................ 1-2
Additional Operations ..................................................... 1-3
Additional Information ..................................................... 1-6

2.

DISASSEMBLY

2-1.

Front Panel Assembly and Case Removal ...................... 2-1

2-2.

AV-39/FR-123/FR-124/MJ-85 Boards Removal .............. 2-1

2-3.

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

2-4.

Rear Panel, MA-308/SR-28 Boards Removal ................. 2-2

2-5.

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

2-6.

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/Mode Control Block Diagram ................... 3-7

3-4.

Audio Block Diagram ...................................................... 3-10

3-5.

Karaoke Block Diagram .................................................. 3-13

3-6.

Surround Block Diagram ................................................. 3-15

3-7.

Power Supply Block Diagram .......................................... 3-17

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-308 Printed Wiring Board ......................................... 4-5
MA-308 (Servo/System Control, Video, Audio, Karaoke)
Schematic Diagram ......................................................... 4-7
MA-308 (Power Supply) Schematic Diagram .................. 4-13
AV-39, FR-123, FR-124, MJ-85 Printed Wiring Boards .. 4-15
AV-39, FR-123, FR-124, MJ-85 Schematic Diagrams .... 4-17
SR-28 Printed Wiring Board and Schematic Diagram .... 4-20

Section

Title

Page

5.

INTERFACE,  IC  PIN  FUNCTION  DESCRIPTION

5-1.

System Control-Video Block Interface
(MA-308 board IC401) .................................................... 5-1

5-2.

System Control-Servo Peripheral Circuit Interface
(MA-308 board IC401) .................................................... 5-1

5-3.

System Control-Mechanism Block Interface
(MA-308 board IC401) .................................................... 5-2

5-4.

System Control-System control Peripheral circuit
Interface (MA-308 board IC401) ..................................... 5-3

5-5.

System Control-Audio Block Interface
(MA-308 board IC401) .................................................... 5-3

5-6.

System Control and RF Modulator
–Input Selection Block Interface
(MA-308 board IC401) .................................................... 5-3

5-7.

Servo System Control Microprocessor Pin Function
(MA-308 board IC401) .................................................... 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 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 Check ....................................................... 6-2

2-3.

Servo/Video System Adjustments .................................. 6-2

2-3-1.

Switching Position Adjustment ................................... 6-2

2-4.

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

2-4-1.

Hi-Fi Audio System Adjustment ................................. 6-3

1.

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

2-4-2.

Normal Audio System Adjustment ............................. 6-3

1.

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

2.

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

3.

Recording Bias 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 Cabinet Assemblies ......................... 7-1

7-1-2.

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

7-1-3.

Mechanism Deck-1 .................................................... 7-4

7-1-4.

Mechanism Deck-2 .................................................... 7-5

7-1-5.

Mechanism Deck-3 .................................................... 7-6

7-2.

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