-2-ContentsSERVICE MANUAL ....................................................... 1Contents ........................................................................ 2Safety Instructions ......................................................... 3Safety Precautions ..................................................... 3Product Safety Notice ................................................. 3Service Personnel Warning ........................................ 3Specifications ................................................................ 4Circuit Protections ......................................................... 5Fuse ............................................................................ 5Thermal protectors (SW902) ...................................... 5Mechanical sensor switches (SW901, SW1891) ......... 6Temperature sensors, wind sensors........................... 7Power failure and fan lock detection........................... 8Maintenance .................................................................. 9Replacing the Filter Cartridge..................................... 9Lamp Replacement ...................................................11How to check Lamp Used Time ............................... 12Quick maintenance ................................................... 13Lens Installation........................................................ 14Using the Lens Antitheft screw ................................. 15Cleaning ................................................................... 16Cleaning the Projection Lens ................................... 16Cleaning the Projector Cabinet................................. 16Security Function Notice ............................................. 17Mechanical Disassembly............................................. 18Optical Parts Disassembly .......................................... 27Adjustments ................................................................. 33Adjustments after Parts Replacement ...................... 33Note on Main Board Replacement ........................... 33Service Adjustment Menu Operation ....................... 34Optical Adjustment ...................................................... 351. Optical axis adjustment ........................................ 362. Contrast adjustment ............................................. 40Electrical Adjustments ................................................. 41Circuit Adjustments................................................... 41Test Points and Locations ........................................ 45Service Adjustment Data Table ................................ 46Troubleshooting ........................................................... 65Chassis over view ..................................................... 65No Power .................................................................. 66No Power (Power supply) ......................................... 67No Power (Power supply) ......................................... 68No Power (Fan control)............................................. 69No Power (Lamp control) .......................................... 70Temperature Abnormality ......................................... 71No Picture ................................................................. 72No Sound.................................................................. 73Motor control problems ............................................. 74Bus control................................................................ 75LED drive & RC control ........................................... 76Indicators and Projector Condition ........................... 77Power failure detection system ................................ 80Diagnosis of Power Failure with RS-232C port ........ 84Serial Control Interface ............................................. 85Control Port Functions................................................. 87IC Block Diagrams....................................................... 90Parts Location Diagrams ........................................... 100Mechanical Parts List ................................................ 109Electrical Parts List .....................................................111Diagrams & Drawings .................................................. A1Parts description and reading in schematic diagram ..A2Schematic Diagrams ...................................................A3Printed Wiring Board Diagrams ................................. A13Pin description of diode, transistor and IC................. A17Note on Soldering...................................................... A18