Sony TRINITRON KV-20FS12 - Section 2 Disassembly; 2-1. Rear Cover Removal; 2-2. Chassis Assembly Removal; 2-3. Service Position

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KV-20FS12/20FV12/21FE12/A/C/21FM12/21FV12/C
Section Title Page
Warnings and Cautions...............................................................................................................................................................4
Self-Diagnostic Function.............................................................................................................................................................4
Safety Check-Out Instructions....................................................................................................................................................7
1. GENERAL...........................................................................................................................................................8
2. DISASSEMBLY
2-1. Rear Cover Removal.....................................................................................................................................................13
2-2. Chassis Assembly Removal.........................................................................................................................................13
2-3. Service Position............................................................................................................................................................13
2-4. Picture Tube Removal...................................................................................................................................................14
3. SET-UP ADJUSTMENTS
3-1. Beam Landing...............................................................................................................................................................15
3-2. Convergence.................................................................................................................................................................16
3-3. Focus.............................................................................................................................................................................17
3-4. Screen (G2)...................................................................................................................................................................17
3-5. Method of Setting the Service Adjustment Mode.........................................................................................................18
3-6. White Balance Adjustments..........................................................................................................................................18
4. SAFETY RELATED ADJUSTMENTS
4-1. R562 Confirmation Method (HV Hold-Down Confirmation and Readjustments)....................................................19
4-2. B+ Voltage Confirmation and Adjustment.....................................................................................................................19
5. CIRCUIT ADJUSTMENTS
5-1. Setting the Service Adjustment Mode..........................................................................................................................21
5-2. Memory Write Confirmation Method.............................................................................................................................21
5-3. Adjustment Buttons and Indicators...............................................................................................................................21
5-4. MB Board Adjustments.................................................................................................................................................23
6. DIAGRAMS
6-1. Block Diagram...............................................................................................................................................................27
6-2. Circuit Board Location..................................................................................................................................................30
6-3. Printed Wiring Boards and Schematic Diagrams.........................................................................................................30
• A Board....................................................................................................................................................................31
• K Board....................................................................................................................................................................38
• MB Board.................................................................................................................................................................39
• CB Board..................................................................................................................................................................47
• VB Board..................................................................................................................................................................49
• HZ Board..................................................................................................................................................................50
6-4. Semiconductors............................................................................................................................................................51
7. EXPLODED VIEW
7-1. Chassis (KV-21FE12/C ONLY)....................................................................................................................................52
7-2. Chassis (KV-21FE12A MODEL ONLY).........................................................................................................................53
7-3. Chassis (KV-20FV12/21FV12/C ONLY).......................................................................................................................54
7-4. Chassis (KV-20FS12/21FM12 ONLY)..........................................................................................................................55
8. ELECTRICAL PARTS LIST.................................................................................................................................................56
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