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Section

Title

Page

Section

Title

Page

Feature Difference ................................................................... 4
SERVICE NOTE ...................................................................... 6

1.

GENERAL

Getting Started .............................................................. 1-1
Basic Operations ........................................................... 1-10
Additional Operations .................................................... 1-15
Editing ............................................................................ 1-20
Additional Information ................................................... 1-21

2.

DISASSEMBLY

2-1.

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

2-2.

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

2-3.

Power Block (SRV938EK) Removal .............................. 2-1

2-4.

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

2-5.

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

2-6.

MA-373 Board Removal ................................................ 2-2

2-7.

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

2-8.

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-373 Printed Wiring Board ....................................... 4-5
MA-373 (Head Amp) Schematic Diagram .................... 4-9
MA-373 (Video, Audio) Schematic Diagram ................. 4-11
MA-373 (SECAM) Schematic Diagram ......................... 4-15
MA-373 (Servo/System Control)
Schematic Diagram ....................................................... 4-17
MA-373 (Hi-Fi Audio) Schematic Diagram .................... 4-21
MA-373 (Tuner) Schematic Diagram ............................ 4-23
MA-373 (I/O) Schematic Diagram ................................. 4-25
MA-373 (Mode Control) Schematic Diagram ................ 4-27
MA-373 (Power Supply) Schematic Diagram ............... 4-29
JK-180, KK-23 Schematic Diagrams ............................ 4-31
JK-180, KK-23 Printed Wiring Boards .......................... 4-33
DS-91 Printed Wiring Board .......................................... 4-34
DS-91 Schematic Diagram ............................................ 4-35
SRV938EK Printed Wiring Board .................................. 4-37
SRV938EK Schematic Diagram .................................... 4-39

5.

INTERFACE, IC  PIN  FUNCTION  DESCRIPTION

5-1.

System Control-Video Block Interface
(MA-373 BOARD IC162) ............................................... 5-1

5-2.

System Control-Servo Peripheral Circuit Interface
(MA-373 BOARD IC162) ............................................... 5-1

5-3.

System Control-Mechanism Block Interface
(MA-373 BOARD IC162) ............................................... 5-2

5-4.

System Control-System Control Peripheral Circuit
Interface (MA-373 BOARD IC162) ................................ 5-3

5-5.

System Control-Audio Block Interface
(MA-373 BOARD IC162) ............................................... 5-3

5-6.

Servo/System Control Microprocessor Pin Function
(MA-373 BOARD IC162) ............................................... 5-4

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

2-2.

Power Supply Adjustments ........................................... 7-2

2-2-1. Power Supply Check ................................................ 7-2
2-2-2. +6 V Adjustment ....................................................... 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.

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 ....................... 8-1
8-1-2. Chassis Assembly .................................................... 8-3
8-1-3. Mechanism Chassis Assembly (1) ........................... 8-4
8-1-4. Mechanism Chassis Assembly (2) ........................... 8-5
8-1-5. Mechanism Chassis Assembly (3) ........................... 8-6

8-2.

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

• This set can be disassembled in the order shown below.

Pages in          indicated pages in the SERVICE MANUAL.
Pages in          indicated pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI.

Set

Upper Case
(Page 2-1)

Front Panel

Section

(Page 2-1)

Power Block

(SRV938EK)

(Page 2-1)

Pinch Press

Block Ass’y

(Page 14)

Ground Shaft

Ass’y

(Page 13)

Mechanism

Deck

(Page 2-2)

FL Complete

 Ass’y

(Page 13)

Drum
Ass’y

(Page 13)

Rear

Panel

(Page 2-1)

Rubber

Belt

(Page 15)

Rubber

Belt

(Page 15)

Slider

(Page 26)

Loading

Gear (T, S)

(Page 28)

Retainer

 Plate

(Page 22)

Rubber

Belt

(Page 15)

Capstan

Motor

(Page 15)

FL Slider

 Block Ass’y

(Page 22)

Pully Gear

Ass’y

(Page 29)

Cam Motor

Retainer

(Page 31)

Cam Gear

(Page 23)

Cam Motor

(Page 31)

Reel Direct

Ass’y

(Page 30)

MA-373

Board

(Page 2-2)

Rotary
Switch

(Page 2-2)

Tuner

Unit

This section is extracted from SLV-SE800N/K
instruction manual. (3-868-277-11)