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Contents
SERVICE MANUAL ....................................................... 1
Contents ........................................................................ 2
Safety Instructions ......................................................... 3
Safety Precautions ..................................................... 3
Product Safety Notice ................................................. 3
Service Personnel Warning ........................................ 3
Specifications ................................................................ 4
Circuit Protections ......................................................... 5
Fuse ............................................................................ 5
Thermostat (SW901) .................................................. 6
Lamp cover switch (SW902) .......................................
6
Temperature sensors (TH901, TH902, IC8841) .........
7
Power failure and fan lock detection ........................... 8
Maintenance .................................................................. 9
Cleaning the Air Filter ................................................. 9
Resetting the Filter Counter ........................................ 9
Lamp Replacement .................................................. 10
Resetting the Lamp Counter ..................................... 11
How to check Lamp Used Time ................................ 11
Quick maintenance ................................................... 12
Prohibition of motor control ....................................... 13
Cleaning ................................................................... 14
Security Function Notice .............................................. 15
Mechanical Disassembly ............................................. 16
Optical Parts Disassembly ........................................... 34
Adjustments ................................................................. 49
Adjustments after Parts Replacement ...................... 49
Note on the main board replacement ....................... 49
Optical Adjustments ..................................................... 50
Before Adjustment .................................................... 50
1. Optical axis adjustment ........................................ 51
2. Contrast adjustment .............................................
55
Electrical Adjustments ................................................. 56
Service Adjustment Menu Operation ........................ 56
Memory IC (IC1391) Replacement ........................... 56
Circuit Adjustments ................................................... 57
Test Points and Locations ........................................ 60
Service Adjustment Data Table ................................ 61
Troubleshooting ........................................................... 77
Chassis over view ..................................................... 77
No Picture ................................................................. 78
No Sound .................................................................. 80
Motor Control Problems ............................................ 84
Bus control ................................................................ 85
LED drive & RC control ............................................ 86
Indicators and Projector Condition ........................... 87
Power failure detection system ................................ 89
Error information table .............................................. 89
Power failure detection tree ...................................... 90
Error History Log ...................................................... 91
Diagnosis of Power Failure with RS-232C port ........
92
Diagnosis procedure ................................................. 92
Control Port Functions ................................................. 93
System Control I/O Port Functions (PW392, IC301)
93
Parallel I/O Expander Port Functions (TE7783,
IC1801) ..................................................................... 94
Parallel Bus Input Expander Port Functions
(TC74LCX541, IC1881) ............................................ 95
IC Block Diagrams ....................................................... 96
Parts Location Diagrams ........................................... 103
Mechanical Parts Location ..................................... 103
Electrical Parts Location ......................................... 110
Mechanical Parts List ................................................ 111
Electrical Parts List .................................................... 112
Diagrams & Drawings ..................................................A1
Parts description and reading in schematic diagram ...A2
Schematic Diagrams ...................................................A3
Printed Wiring Board Diagrams .................................A11
Pin description of diode, transistor and IC .................A15
Note on Soldering ......................................................A16
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