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TABLE OF CONTENTS
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
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