Read Sony KV-25FS12 Service Manual online
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KV-25FS12 / 25FS12C
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 R564 Confi rmation Method (HV 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. MB Board Adjustments .................................................................................................................19
5. Diagrams
5-1. Circuit Boards Location.................................................................................................................21
5-2. Printed Wiring Boards and Schematic Diagrams..........................................................................21
5-3. Block Diagram...............................................................................................................................22
A Board ........................................................................................................................................24
CB Board......................................................................................................................................28
K Board ........................................................................................................................................30
MB Board .....................................................................................................................................31
VB Board ......................................................................................................................................35
5-4. Semiconductors ............................................................................................................................36
6. Exploded Views
6-1. Chassis .........................................................................................................................................37
7. Electrical Parts List ......................................................................................................................................38
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