ViewSonic PJ550 Service Manual

SERVICE MANUAL

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 Multimedia LCD Projector. Be sure to read
cautionary items described in the manual to maintain safety before servicing.
1. When replace the lamp, to avoid burns to your fingers. The lamp becomes too hot.
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 turn on the projector.
4. Do not touch the exhaust fan, during operation.
5. The LCD module assembly is likely to be damaged. If replacing to 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.
1. Features --------------------------------------------------- 2
2. Specifications--------------------------------------------- 2
3. Names of each part ------------------------------------- 3
4. Adjustment ------------------------------------------------ 5
5. Troubleshooting ---------------------------------------- 12
6. Service points ------------------------------------------ 17
7. Block diagram ------------------------------------------ 23
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Multimedia LCD Projector
Caution
ServiceWarning
Contents
8. Connector connection diagram -------------------- 24
9. Wiring diagram ----------------------------------------- 25
10.Basic circuit diagram---------------------------------- 32
11.Disassembly diagram--------------------------------- 59
12.Replacement parts list ------------------------------- 61
13.RS-232C communication ---------------------------- 62
December 2001
PJ550
(C3XM2)