
– 3 –
KV-XF25M50
RM-954
TABLE OF CONTENTS
Section Title Page
SELF DIAGNOSIS FUNCTION................................ 4
1. GENERAL........................................................................ 8
2. DISASSEMBLY
2-1. Rear Cover Removal................................................ 25
2-2. Chassis Assy Removal ............................................. 25
2-3. F Bracket Removal .................................................. 25
2-4. Service Position ....................................................... 25
2-5. Replacement of Parts ............................................... 26
2-5-1. Replacement of Control Button ....................... 26
2-5-2. Replacement of Light Guide ............................ 26
2-6. Terminal Bracket Removal ...................................... 26
2-7. H3 Board Removal .................................................. 26
2-8. A and B3 Boards Removal ...................................... 27
2-9. Picture Tube Removal.............................................. 27
3. SET-UP ADJUSTMENTS
3-1. Beam Landing.......................................................... 29
3-2. Convergence............................................................. 30
3-3. Focus Adjustment .................................................... 32
3-4. G2 (Screen) and White Balance Adjustments......... 33
4. CIRCUIT ADJUSTMENT
4-1. Adjustments with Commander ................................ 34
4-2. Adjustment Method ................................................. 35
4-3. Picture Quality Adjustments.................................... 40
4-4. A Board Adjustment After IC003 (Memory)
Replacement............................................................. 40
4-5. Picture Distortion Adjustment ................................. 41
Section Title Page
5. DIAGRAMS
5-1. Block Diagram ......................................................... 43
5-2. Frame Schematic Diagram ...................................... 46
5-3 Circuit Boards Location .......................................... 49
5-4. Schematic Diagrams and Printed Wiring Boards ... 50
(1) Schematic Diagram of A (1/2) Board...................... 53
(2) Schematic Diagrams of A (2/2) and F Boards ........ 57
(3) Schematic Diagram of B2 and VM1 Boards........... 61
(4) Schematic Diagrams of B3 Board ........................... 64
(5) Schematic Diagram of C and H3 Boards ................ 73
5-5. Semiconductors........................................................ 76
6. EXPLODED VIEWS
6-1. Speaker Bracket ....................................................... 79
6-2. Chassis ..................................................................... 80
6-3. Picture Tube ............................................................. 81
7. ELECTRICAL PARTS LIST....................................... 82