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TABLE OF CONTENTS
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
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