SERVICE MANUAL LC-XB41 - TechEdu.com

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
Thermal switch............................................................ 5
Lamp cover switch...................................................... 5
Fuse............................................................................ 5
Warning temperature and power failure protection..... 6
Maintenance................................................................... 7
Cleaning the Filter....................................................... 7
Resetting the Filter Counter........................................ 7
Lamp Replacement..................................................... 8
Resetting the Lamp Counter....................................... 9
How to check Lamp Used Time.................................. 9
Cleaning.................................................................... 10
Security Function Notice.............................................. 11
Security Function Disable......................................... 11
Mechanical Disassembly.............................................. 12
Optical Parts Disassembly........................................... 16
Adjustments................................................................. 22
Adjustments after Parts Replacement....................... 22
Optical Adjustments..................................................... 23
Contrast adjustment.................................................. 23
Integrator lens adjustment......................................... 24
Relay lens-Out adjustment........................................ 25
Electrical Adjustments.................................................. 26
Service Adjustment Menu Operation........................ 26
Memory IC (IC1391) Replacement........................... 26
Circuit Adjustments................................................... 27
Test Points and Locations......................................... 31
Service Adjustment Data Table................................. 32
Chassis Block Diagrams.............................................. 45
Chassis over view..................................................... 45
System control.......................................................... 46
Lamp control............................................................. 47
Audio circuit............................................................... 48
Power supply & protection circuit.............................. 49
Fan control circuit...................................................... 50
IIC bus control circuit................................................. 51
Troubleshooting........................................................... 52
Indicators and Projector Condition............................ 52
No Power.................................................................. 53
No Picture................................................................. 54
No Sound.................................................................. 55
Control Port Functions................................................. 56
Scaler I/O Port Functions (PW190)........................... 56
IIC Bus D/A Converter Port Functions (M62334)...... 57
Waveform..................................................................... 58
IC Block Diagrams....................................................... 59
Electrical Parts List....................................................... 66
Electrical Parts Location............................................ 67
Electrical Parts List.................................................... 68
Mechanical Parts List................................................... 88
Cabinet Parts Location.............................................. 88
Optical Parts Location............................................... 89
Mechanical Parts List................................................ 93
Diagrams & Drawings..................................................A1
Parts description and reading in schematic diagram...A2
Schematic Diagrams....................................................A3
Printed Wiring Board Diagrams....................................A9
Pin description of diode, transistor and IC.................A13
Note on Soldering......................................................A14
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