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SM0523
CPX995W (P4XM2)
SERVICE MANUAL
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Multimedia LCD Projector
June 2002 Digital Media Division
Be sure to read this manual before servicing. To assure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this HITACHI Multimedia LCD Projector. Be sure to
read cautionary items described in the manual to maintain safety before servicing.
Caution
1.The lamp becomes hot, avoid burns to your fingers when replacing the lamp.
2. Never touch the lamp bulb with a finger or anything else. Never drop it or give it a shock. They may cause
bursting of the bulb.
3. This projector is provided with a high voltage circuit for the lamp. Do not touch the electric parts of power
unit (main), when turning on the projector.
4. Do not touch the exhaust fan during operation.
5. The LCD module assembly is likely to be damaged. If replacing the LCD module assembly, do not hold
the FPC of the LCD module assembly.
6. Use the cables which are included with the projector or specified.
Service Warning
1. Features --------------------------------------------------- 2
2. Specifications--------------------------------------------- 2
3. Names of each part ------------------------------------- 3
4. Adjustment ------------------------------------------------ 7
5. Troubleshooting---------------------------------------- 14
6. Service points ------------------------------------------ 20
7. Block diagram ------------------------------------------ 24
8. Wiring diagram ----------------------------------------- 25
9. Basic circuit diagram---------------------------------- 29
10.Connector connection diagram -------------------- 54
11.Disassembly diagram--------------------------------- 55
12.Replacement parts list-------------------------------- 57
13.RS-232C communication ---------------------------- 58
Contents


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1. Features
High brightness, High resolution
RGB output terminal
RS-232C Communication
Mouse emulation
Power zoom and power focus functions
Complies with VESA DDC1/2B specifications
Auto-adjustment function
2. Specifications


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3. Names of each part
Parts names


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OSD Message
The messages as described below may appear on the screen at power ON. Take the appropriate measures when
such messages appears.