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KV-T25SN81
RM-870
TABLE OF CONTENTS
SELF DIAGNOSIS FUNCTION ............................... 4
1. GENERAL.................................................................... 5
2. DISASSEMBLY
2-1. Rear Cover Removal............................................ 11
2-2. A Board Removal ................................................ 11
2-3. F1 Board Removal ............................................... 11
2-4. Service Position ................................................... 11
2-5. Replacement of Parts ........................................... 12
2-6. Demagnetization Coil Removal .......................... 12
2-7. Picture Tube Removal.......................................... 13
3. SET-UP ADJUSTMENTS
3-1. Beam Landing ...................................................... 14
3-2. Convergence......................................................... 15
3-3. Focus Adjustment ................................................ 17
3-4. G2 (Screen) and White Balance Adjustments..... 17
4. CIRCUIT ADJUSTMENTS
4-1. Adjustments with Commander ............................ 18
4-2. Adjustment Method ............................................. 19
4-3. A Board Adjustment after IC003 (Memory)
Replacement......................................................... 22
4-4. Picture Distortion Adjustment............................. 22
5. DIAGRAMS
5-1. Block Diagram ...................................................... 25
5-2. Circuit Boards Location ....................................... 29
5-3. Schematic Diagrams and Printed Wiring Boards. 29
(1) Sc hematic Dia gram of A Board ........................... 33
(2) Schematic Diagrams of A3, F1 and V1 Boards ... 37
(3) Sc hematic Diagrams of C and VM Boards .......... 45
5-4. Semiconductors ..................................................... 48
6. EXPLODED VIEW
6-1. Chassis .................................................................. 51
7. ELECTRICAL PARTS LIST ................................... 53
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