Sanyo 1 122 121 00, Service Manual

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Contents
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Safety instructions ________________________________________________3
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Specifications __________________________________________________ 4
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Note on Servicing ______________________________________________ 5
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Adjustments after parts replacement ________________________________ 5
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Circuit protections ______________________________________________ 6-7
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Fuse ____________________________________________________ 6
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Thermal switch ____________________________________________ 6
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Interlock switch ____________________________________________ 6
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Warning temperature and power failure protection ________________ 7
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Mechanical disassemblies ______________________________________ 8-13
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Optical parts disassemblies ____________________________________ 14-17
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LCD panel/prism ass’y replacement ________________________________ 19
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Lamp replacement ______________________________________________ 20
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Optical adjustments __________________________________________ 21-24
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Contrast adjustment ________________________________________ 21
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Condenser lens adjustment __________________________________ 22
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Condenser lens-Out adjustment ______________________________ 23
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Relay lens-Out adjustment __________________________________ 24
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Electric adjustments __________________________________________ 25-30
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Service adjustment menu operation ____________________________ 23
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Circuit adjustments ______________________________________ 24-29
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Service adjustment data table ______________________________ 30-33
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Test points and locations ____________________________________ 34
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Troubleshooting ______________________________________________ 35-39
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No power ______________________________________________ 35-36
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No picture ____________________________________________ 37-38
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No sound ________________________________________________ 39
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Lens motor problems ______________________________________ 39
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Control port functions ________________________________________ 40-43
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Waveforms __________________________________________________ 44-45
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Cleaning ______________________________________________________ 46
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IC block diagrams ____________________________________________ 47-53
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Service parts lists ____________________________________________ 54-83
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Electrical parts list ______________________________________ 54-76
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Mechanical parts list ____________________________________ 77-78
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Optical parts list ________________________________________ 79-83
Drawings & Diagrams
______________________________________ A1-A15
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Parts description and reading in schematic diagram ____________________ A2
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Circuit block diagram ____________________________________________ A3
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Power supply lines ______________________________________________ A4
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Schematic diagrams ________________________________________ A5-A11
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Printed wiring board diagrams ________________________________ A12-A14
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Pins description of ICs, transistors, diodes __________________________ A15