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KV-T25SN81
RM-870
TABLE OF CONTENTS
SELF DIAGNOSIS FUNCTION ...............................
4
1. GENERAL
....................................................................
5
2. DISASSEMBLY
2-1.
Rear Cover Removal ............................................
11
2-2.
A Board Removal ................................................
11
2-3.
F1 Board Removal ...............................................
11
2-4.
Service Position ...................................................
11
2-5.
Replacement of Parts ...........................................
12
2-6.
Demagnetization Coil Removal ..........................
12
2-7.
Picture Tube Removal ..........................................
13
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing ......................................................
14
3-2.
Convergence .........................................................
15
3-3.
Focus Adjustment ................................................
17
3-4.
G2 (Screen) and White Balance Adjustments .....
17
4. CIRCUIT ADJUSTMENTS
4-1.
Adjustments with Commander ............................
18
4-2.
Adjustment Method .............................................
19
4-3.
A Board Adjustment after IC003 (Memory)
Replacement.........................................................
Replacement.........................................................
22
4-4.
Picture Distortion Adjustment .............................
22
5. DIAGRAMS
5-1.
Block Diagram ......................................................
25
5-2.
Circuit Boards Location .......................................
29
5-3.
Schematic Diagrams and Printed Wiring Boards.
29
(1)
Schematic Diagram of A Board ...........................
33
(2)
Schematic Diagrams of A3, F1 and V1 Boards ...
37
(3)
Schematic Diagrams of C and VM Boards ..........
45
5-4.
Semiconductors .....................................................
48
6. EXPLODED VIEW
6-1.
Chassis ..................................................................
51
7. ELECTRICAL PARTS LIST
...................................
53
Section
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Section
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