Read Sony HMD-A240R Service Manual online
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HMD-A240R
TABLE OF CONTENTS
POWER MANAGEMENT ....................................................................................................................... 4
SELF DIAGNOSIS FUNCTION.............................................................................................................. 4
TIMING SPECIFICATION....................................................................................................................... 4
WARNINGS AND CAUTIONS................................................................................................................ 5
SAFETY CHECK-OUT ........................................................................................................................... 6
SECTION 1: DISASSEMBLY
1-1. Cabinet Removal............................................................................................................................ 7
1-2. Service Position.............................................................................................................................. 7
1-3. A & D Board Removal.................................................................................................................... 8
1-4. Picture Tube Removal .................................................................................................................... 9
ANODE CAP REMOVAL ................................................................................................................ 9
SECTION 2: SAFETY RELATED ADJUSTMENTS
2-1. HV Regulator Check..................................................................................................................... 10
2-2. HV Protector Circuit Check........................................................................................................... 10
2-3. Beam Protector Check (Software Logic) ..................................................................................... 10
2-4. B+ Voltage Check......................................................................................................................... 10
SECTION 3: ADJUSTMENTS
3-1. Landing Rough Adjustment ...........................................................................................................11
3-2. Landing Fine Adjustment...............................................................................................................11
3-3. Convergence Rough Adjustment...................................................................................................11
3-4. Convergence and V. Key (H. Trp) Fine Adjustment.......................................................................11
3-5. Vertical and Horizontal Position and Size Specification ............................................................... 12
3-6. Focus Adjustment......................................................................................................................... 13
3-7. Digital Convergence Adjustment .................................................................................................. 13
3-8. Convergence Specification........................................................................................................... 13
SECTION 4: DIAGRAMS
4-1. Circuit Boards Location ................................................................................................................ 14
4-2. Printed Wiring Board and Schematic Diagram Information.......................................................... 14
4-3. Block Diagrams and Schematics.................................................................................................. 15
A Board Schematic Diagram......................................................................................................... 17
D Board Schematic Diagram........................................................................................................ 18
H Board Schematic Diagram........................................................................................................ 23
J Board Schematic Diagram......................................................................................................... 24
4-4. Semiconductors............................................................................................................................ 25
SECTION 5: EXPLODED VIEWS
5-1. Picture Tube ................................................................................................................................. 26
5-2. Chassis......................................................................................................................................... 27
5-3. Packing Materials ......................................................................................................................... 28
SECTION 6: ELECTRICAL PARTS LIST............................................................................................................ 29
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