– 4 –
KV-XG25M8J/XG25P50
RM-952
TABLE OF CONTENTS
Section Title Page
SELF DIAGNOSIS FUNCTION ................................ 5
1. GENERAL ........................................................................ 9
2. DISASSEMBLY
2-1. Rear Cover Removal ................................................ 24
2-2. Speaker Removal ..................................................... 24
2-3. Chassis Assy Removal ............................................. 24
2-4. Service Position ....................................................... 24
2-5. Replacement of Parts ............................................... 24
2-5-1. Replacement of Control Button ..................................... 24
2-5-2. Replacement of Light Guide .......................................... 24
2-6. Terminal Bracket Removal ...................................... 25
2-7. H2 Board Removal .................................................. 25
2-8. A and B6 Boards Removal ...................................... 25
2-9. Picture Tube Removal .............................................. 26
2-10. Removal of Anode Cap ............................................ 26
3. SET-UP ADJUSTMENTS
3-1. Beam Landing .......................................................... 27
3-2. Convergence ............................................................. 28
3-3. Focus Adjustment .................................................... 30
3-4. G2 (Screen) and White Balance Adjustments ......... 31
4. CIRCUIT ADJUSTMENT
4-1. Adjustments with Commander ................................ 32
4-2. Adjustment Method ................................................. 32
4-3. Picture Quality Adjustments .................................... 37
4-4. Deflection Adjustment ............................................. 37
4-5. H-Trapezoid Adjustment ......................................... 37
4-6. A Board Adjustment After IC003 (Memory)
Replacement ............................................................. 37
4-7. Picture Distortion Adjustment ................................. 38
Section Title Page
5. DIAGRAMS
5-1. Block Diagram ......................................................... 39
5-2. Circuit Boards Location .......................................... 41
5-3. Schematic Diagrams ................................................ 42
(1) Schematic Diagram of B6 Boards ........................... 43
(2) Schematic Diagrams of A Board ............................. 45
(3) Schematic Diagram of H2 Board ............................... 61
(4) Schematic Diagrams of C6 Board ........................... 63
(5) Schematic Diagram of VM1 Board ......................... 65
5-4. Voltage Measurements ............................................ 67
5-5. Waveforms ............................................................... 71
5-6. Printed Wiring Boards and Parts Location .............. 73
5-7. Semiconductors ........................................................ 77
6. EXPLODED VIEWS
6-1. Picture Tube ............................................................. 79
6-2. Chassis ..................................................................... 80
7. ELECTRICAL PARTS LIST....................................... 81