— 3 —
KV-24FV12/25FV12/25FV12A/25FV12C
Section
Title
Page
Warnings and Cautions ............................................................................................................................................................... 4
Self-Diagnostic Function ............................................................................................................................................................. 4
Safety Check-Out Instructions .................................................................................................................................................... 7
1.
GENERAL ........................................................................................................................................................... 8
2.
DISASSEMBLY
2-1.
Rear Cover Removal ..................................................................................................................................................... 13
2-2.
Chassis Assembly Removal ......................................................................................................................................... 13
2-3.
Service Position ............................................................................................................................................................ 13
2-4.
Picture Tube Removal ................................................................................................................................................... 14
3.
SET-UP ADJUSTMENTS
3-1.
Beam Landing ............................................................................................................................................................... 15
3-2.
Convergence ................................................................................................................................................................. 16
3-3.
Focus ............................................................................................................................................................................. 17
3-4.
Screen (G2) ................................................................................................................................................................... 17
3-5.
Method of Setting the Service Adjustment Mode ......................................................................................................... 18
3-6.
White Balance Adjustments .......................................................................................................................................... 18
4.
SAFETY RELATED ADJUSTMENTS
4-1.
R564 Confirmation Method (HV Hold-Down Confirmation and Readjustments) .................................................... 19
4-2.
B+ Voltage Confirmation and Adjustment ..................................................................................................................... 19
5.
CIRCUIT ADJUSTMENTS
5-1.
Setting the Service Adjustment Mode .......................................................................................................................... 21
5-2.
Memory Write Confirmation Method ............................................................................................................................. 21
5-3.
Adjustment Buttons and Indicators ............................................................................................................................... 21
5-4.
A Board Adjustments .................................................................................................................................................... 23
6.
DIAGRAMS
6-1.
Block Diagram ............................................................................................................................................................... 27
6-2.
Circuit Board Location .................................................................................................................................................. 31
6-3.
Printed Wiring Boards and Schematic Diagrams ......................................................................................................... 31
•
A Board .................................................................................................................................................................... 33
•
MB Board ................................................................................................................................................................. 39
•
CB Board .................................................................................................................................................................. 45
•
HZ Board .................................................................................................................................................................. 46
•
K Board .................................................................................................................................................................... 47
•
VB Board .................................................................................................................................................................. 48
6-4.
Semiconductors ............................................................................................................................................................ 49
7.
EXPLODED VIEW
7-1.
Chassis (KV-24FV12 ONLY) ........................................................................................................................................ 50
7-2.
Chassis (KV-25FV12A ONLY) ....................................................................................................................................... 51
7-3.
Chassis (KV-25FV12/25FV12C ONLY) ........................................................................................................................ 52
8.
ELECTRICAL PARTS LIST
................................................................................................................................................. 53
TABLE OF CONTENTS
