Service manual

MCM 21T1
– 5 –
Note: Hand degauss must be used on stand-by or power-off condition.
This model has an automatic earth magnetism correction function by using an earth
magnetism sensor and a LCC coil. When using a hand degauss while monitor (LCC
coil) is being operated, it sometimes gets magnetized, and the system may not work
properly as a result.
TABLE OF CONTENTS
Section Title Page
1. GENERAL ................................................................. 1-1
2. DISASSEMBLY
2-1. Cabinet Removal ............................................... 2-1
2-2. D Board Removal .............................................. 2-1
2-3. G Board Removal .............................................. 2-2
2-4. A Board Removal .............................................. 2-2
2-5. L Board Removal .............................................. 2-3
2-6. I/O TERMINAL Board Assy Removal ............. 2-3
2-7. Service Position .................................................. 2-4
2-8. H and J Boards Removal ................................... 2-4
2-9. Picture Tube Removal ....................................... 2-5
3. SAFETY RELATED ADJUSTMENT ............. 3-1
4. ADJUSTMENTS ..................................................... 4-1
5. DIAGRAMS
5-1. Block Diagrams .................................................. 5-1
5-2. Frame Shcematic Diagram ................................. 5-7
5-3. Circuit Boards Location ..................................... 5-9
5-4. Schematic Diagrams and Printed Wiring
Boards ................................................................. 5-9
(1) Schematic Diagram of D Board ........................ 5-13
(2) Schematic Diagrams of G, GA, H, J and
L Boards ............................................................ 5-17
(3) Schematic Diagram of A Board ........................ 5-24
5-5. Semiconductors ................................................. 5-29
6. EXPLODED VIEWS
6-1. Chassis ............................................................... 6-1
6-2. Picture Tube ...................................................... 6-2
6-3. Packing Materials ............................................... 6-3
7. ELECTRICAL PARTS LIST ............................ 7-1