– 3 –
KV-XF25N90
RM-914
TABLE OF CONTENTS
Section
Title
Page
SELF DIAGNOSIS FUNCTION
................................
4
1. GENERAL
........................................................................
8
2. DISASSEMBLY
2-1.
Rear Cover Removal ................................................ 22
2-2.
Chassis Assy Removal ............................................. 22
2-3.
F Bracket Removal .................................................. 22
2-4.
Service Position ....................................................... 23
2-5.
Replacement of Parts ............................................... 23
2-5-1.
Replacement of Control Button .......................
23
2-5-2.
Replacement of Light Guide ............................
23
2-6.
Terminal Bracket Removal ...................................... 23
2-7.
H3 Board Removal .................................................. 23
2-8.
A and B3 Boards Removal ...................................... 24
2-9.
Picture Tube Removal .............................................. 24
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing .......................................................... 26
3-2.
Convergence ............................................................. 27
3-3.
Focus Adjustment .................................................... 29
3-4.
G2 (Screen) and White Balance Adjustments ......... 30
4. CIRCUIT ADJUSTMENT
4-1.
Adjustments with Commander ................................ 31
4-2.
Adjustment Method ................................................. 32
4-3.
Picture Quality Adjustments .................................... 37
4-4.
A Board Adjustment After IC003 (Memory)
Replacement ............................................................. 37
4-5.
Picture Distortion Adjustment ................................. 38
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)
Schematic Diagram of A (1/2) Board ...................... 51
(2)
Schematic Diagrams of A (2/2) and F Boards ........ 55
(3)
Schematic Diagrams of B2 and VM1 Boards ......... 59
(4)
Schematic Diagram of B3 Board ............................ 62
(5)
Schematic Diagrams of C and H3 Boards .............. 69
5-5.
Semiconductors ........................................................ 72
6. EXPLODED VIEWS
6-1.
Speaker Bracket ....................................................... 75
6-2.
Chassis ..................................................................... 76
6-3.
Picture Tube ............................................................. 77
7. ELECTRICAL PARTS LIST
........................................ 78
Summary of Contents for TRINITRON KV-XF25N90
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