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CPD-G420
SECTION TITLE
PAGE
Power
Management.................................................................................................................................. 4
Self Diagnosis Function ............................................................................................................................ 4
Timing
SpeciÞ cation.................................................................................................................................. 4
Warnings and Cautions............................................................................................................................. 5
Safety
Check-Out
.................................................................................................................................... 6
1. Disassembly
1-1.
Cabinet
Removal............................................................................................................................... 7
1-2.
Service
Position ................................................................................................................................ 8
1-3. A1 Board (C Block) Removal ............................................................................................................ 9
1-4. A1 Board and US Board Removal .................................................................................................... 9
1-5. Bezel Assembly and H1 Board Removal ........................................................................................ 10
1-6. D Board Removal............................................................................................................................ 10
1-7.
Picture
Tube
Removal......................................................................................................................11
Anode Cap Removal ........................................................................................................................11
1-8.
Harness
Location ............................................................................................................................ 12
2. Safety Related Adjustments
2-1. HV Regulator Circuit Check ............................................................................................................ 13
2-2. HV Protector Circuit Check ............................................................................................................. 13
2-3. Beam Current Protector Circuit Check............................................................................................ 13
3. Adjustments
3-1.
3-1.
Landing
Rough
Adjustment ............................................................................................................. 14
3-2.
Landing
Fine
Adjustment................................................................................................................. 14
3-3.
Convergence
Rough
Adjustment .................................................................................................... 15
3-4. White Balance Adjustment SpeciÞ cation......................................................................................... 15
3-5. Vertical and Horizontal Position and Size SpeciÞ cation .................................................................. 15
3-6.
Focus
Adjustment............................................................................................................................ 15
4. Diagrams
4-1.
4-1.
Circuit
Boards
Location ................................................................................................................... 16
4-2. Printed Wiring Board and Schematic Diagram Information............................................................. 16
4-3.
Block
Diagrams ............................................................................................................................... 17
4-4. Schematics and Supporting Information ......................................................................................... 20
A1 Board - Schematic Diagram....................................................................................................... 20
D Board - Schematic Diagram ........................................................................................................ 22
DA Board - Schematic Diagram ...................................................................................................... 24
N Board - Schematic Diagram ........................................................................................................ 25
H1 Board - Schematic Diagram ...................................................................................................... 26
US Board - Schematic Diagram ...................................................................................................... 27
4-5.
Semiconductors .............................................................................................................................. 29
5. Exploded Views
5-1.
5-1.
Picture
Tube
................................................................................................................................... 31
5-2.
Chassis ........................................................................................................................................... 32
5-3.
Packing
Materials............................................................................................................................ 33
6. Electrical Parts List ....................................................................................................................................... 34
TABLE OF CONTENTS
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