– 3 –
KV-XF25M81
RM-954
TABLE OF CONTENTS
Section Title Page
SELF DIAGNOSIS FUNCTION................................ 4
1. GENERAL ........................................................................ 8
2. DISASSEMBLY
2-1. Rear Cover Removal................................................ 23
2-2. Chassis Assy Removal............................................. 23
2-3. F Bracket Removal .................................................. 23
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 ...................................... 24
2-7. V1 Board Removal .................................................. 24
2-8. H3 Board Removal .................................................. 25
2-9. A and B3 Boards Removal ...................................... 25
2-10. Picture Tube Removal.............................................. 25
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 ................................................. 33
4-3. Picture Quality Adjustments.................................... 38
4-4. A Board Adjustment After IC003 (Memory)
Replacement............................................................. 38
4-5. Picture Distortion Adjustment................................. 39
Section Title Page
5. DIAGRAMS
5-1. Block Diagram ......................................................... 41
5-2. Frame Schematic Diagram ...................................... 44
5-3 Circuit Boards Location .......................................... 47
5-4. Schematic Diagrams and Printed Wiring Boards ... 48
(1) Sc hematic Diagram of A (1/2) Board...................... 51
(2) Schematic Diagrams of A (2/2), B2 and F Boards . 55
(3) Schematic Diagram of C Board .............................. 61
(4) Schematic Diagrams of H3, V1 and VM1 Boards .. 67
(5) Schematic Diagram of B3 Board ............................ 70
5-5. Semiconductors ........................................................ 75
6. EXPLODED VIEWS
6-1. Speaker Bracket ....................................................... 78
6-2. Chassis ..................................................................... 79
6-3. Pictur e Tube ............................................................. 80
7. ELECTRICAL PARTS LIST ...................................... 81