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KV-20S90 / 21SE43C
TABLE OF CONTENTS
Specifi cations.......................................................................................................................................3
Warnings and Cautions........................................................................................................................4
Safety Check-out .................................................................................................................................5
Self-Diagnostic Function......................................................................................................................6
1. Disassembly
1-1. Rear Cover Removal.....................................................................................................................8
1-2. Chassis Assembly Removal..........................................................................................................8
1-3. Service Position ............................................................................................................................8
1-4. Picture Tube Removal...................................................................................................................9
Anode Cap Removal Procedure...................................................................................................9
2. Set-up Adjustments
2-1. Beam Landing...............................................................................................................................10
2-2. Convergence.................................................................................................................................11
2-3. Focus ............................................................................................................................................12
2-4. Screen (G2) ..................................................................................................................................12
2-5. Method of Setting the Service Adjustment Mode..........................................................................13
2-6. White Balance Adjustments ..........................................................................................................13
3. Safety Related Adjustments
3-1.
X
R582 Confi rmation Method (Hold Down Confi rmation) and Readjustments...........................14
3-2. B+ Voltage Confi rmation and Adjustment .....................................................................................14
4. Circuit Adjustments
4-1. Setting the Service Adjustment Mode...........................................................................................16
4-2. Memory Write Confi rmation Method.............................................................................................16
4-3. Remote Adjustment Buttons and Indicators .................................................................................16
Adjustment Items..........................................................................................................................17
4-4. A Board Adjustments ....................................................................................................................18
5. Diagrams
5-1. Circuit Boards Location.................................................................................................................21
5-2. Printed Wiring Board and Schematic Diagram Information ..........................................................21
5-3. Block Diagram and Schematics....................................................................................................22
Block Diagram..............................................................................................................................22
A Board Schematic Diagram........................................................................................................23
C Board Schematic Diagram........................................................................................................28
5-4. Semiconductors ............................................................................................................................30
6. Exploded Views
6-1. Chassis .........................................................................................................................................31
7. Electrical Parts List ......................................................................................................................................32
SECTION TITLE PAGE
