
– 3 –
KV-XA25M93/XA29M80
RM-954
TABLE OF CONTENTS
Section Title Page
SELF DIAGNOSIS FUNCTION ................................ 4
1. GENERAL ........................................................................ 7
2. DISASSEMBLY
2.1 Tweeter Removal ..................................................... 24
2-2. Rear Cover Removal ................................................ 24
2-3. Speaker Removal ..................................................... 24
2-4. Chassis Assy Removal ............................................. 24
2-5. F Bracket Removal .................................................. 25
2-6. Service Position ....................................................... 25
2-7. Replacement of Parts ............................................... 25
2-7-1 Replacement of Light Guide .............................................. 25
2-7-2 Replacement of Power Button ........................................... 25
2-8.
J and J1 Board Removal ..............................................
26
2-9. Terminal Bracket Removal ...................................... 26
2-10. D3 Board Removal .................................................. 26
2-11. B1 Board Removal ................................................... 26
2-12. H Board Removal .................................................... 26
2-13. A and B Boards Removal ........................................ 26
2-14. Picture Tube Removal .............................................. 27
2-15. Removal of Anode Cap ............................................ 27
3. ADVANCE OPERATION
3-1. "RESET" Function ................................................... 28
4. SET-UP ADJUSTMENTS
4-1. Beam Landing .......................................................... 29
4-2. Convergence Adjustment ......................................... 30
4-3. Focus Adjustment .................................................... 32
4-4. G2 (Screen) and White Balance Adjustments ......... 33
5. CIRCUIT ADJUSTMENTS
5-1. Adjustments with Commander ................................ 34
5-2. Adjustment Method ................................................. 34
5-3. Picture Quality Adjustments .................................... 39
5-4. Display position Adjustment ................................... 39
5-5. Deflection Adjustment ............................................. 39
5-6. H-Trapezoid Adjustment ......................................... 40
5-7. A Board Adjustment after IC003 Replacement ...... 40
5-8. Picture Distortion Adjustment ................................. 41
Section Title Page
6. DIAGRAMS
6-1. Block Diagram .......................................................... 43
6-2. Circuit Board Location ............................................. 47
6-3. Schematic Diagrams ................................................. 48
(1) Schematic Diagram of A Board .......................... 49
(2) Schematic Diagram of B Board .......................... 65
(3) Schematic Diagram of B1 and D3 Boards ........ 73
(4) Schematic Diagram of C6 and J1 Boards .......... 75
(5) Schematic Diagram of H Board ......................... 77
(6) Schematic Diagram of F and J Boards ............... 79
(7) Schematic Diagram of VM1 Board .................... 80
6-4. Voltage Measurements .............................................. 83
6-5. Waveforms ................................................................ 93
6-6. Printed Wiring Boards and Parts Location ............... 95
6-7. Semiconductors ....................................................... 103
7. EXPLODED VIEWS
7-1. Picture Tube ............................................................ 105
7-2. Chassis .................................................................... 106
8. ELECTRICAL PARTS LIST .................................... 107