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ViewSonic PJ750-2 Service Manual

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Download this manual See also: Service Manual, User 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 ------------------------------------------ 22
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Multimedia LCD Projector
Caution
Service Warning
Contents
8. Connector connection diagram -------------------- 23
9. Wiring diagram ----------------------------------------- 24
10.Basic circuit diagram---------------------------------- 30
11.Disassembly diagram--------------------------------- 65
12.Replacement parts list ------------------------------- 67
13.RS-232C communication ---------------------------- 68
March 2002
PJ750-2

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Summary of Contents for ViewSonic PJ750-2

  • Page 1: Service Manual

    PJ750-2 SERVICE MANUAL Caution 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.
  • Page 2 13. RS-232C communication (1) Turn off the projector and computer power supplies and connect with the RS-232C cable. (2) Turn on the computer power supply and, after the computer has started up, turn on the projector power supply. RS-232C jack Projector Computer D-sub 9-pin...
  • Page 3 Requesting projector status (Get command) (1) Send the request code Header + Command data (‘02H’+‘00H’+ type (2 bytes) +‘00H’+‘00H’) from the computer to the projector. (2) The projector returns the response code ‘1DH’+ data (2 bytes) to the computer. Changing the projector settings (Set command) (1) Send the setting code Header + Command data (‘01H’+‘00H’+ type (2 bytes) + setting code (2 bytes)) from the computer to the projector.

  • Page 4: Command Data Chart

    Command data chart Command data Names Operation type Header Action Type Setting code BE EF 06 00 3B D3 01 00 00 30 00 00 Orange BE EF 06 00 AB D2 01 00 00 30 01 00 Green BE EF 06 00 5B D2 01 00...
  • Page 5 Command data chart Command data Names Operation type Header Action Type Setting code BE EF 06 00 7C D2 02 00 07 30 00 00 Magnify Increment BE EF 06 00 1A D2 04 00 07 30 00 00 Decrement BE EF 06 00 CB D3...
  • Page 6 Command data chart Command data Names Operation type Header Action Type Setting code Normal BE EF 06 00 46 D3 01 00 02 20 00 00 Mute Mute BE EF 06 00 D6 D2 01 00 02 20 01 00 BE EF 06 00 75 D3...
  • Page 7 Command data chart Command data Names Operation type Header Action Type Setting code BE EF 06 00 F1 72 02 00 01 22 00 00 Sharpness Increment BE EF 06 00 97 72 04 00 01 22 00 00 Decrement BE EF 06 00 46 73...

  • Page 8: Color Temp

    Command data chart Command data Names Operation type Header Action Type Setting code BE EF 06 00 CB D0 01 00 08 30 01 00 Sync on G BE EF 06 00 5B D1 01 00 08 30 00 00 BE EF 06 00 68 D1...
  • Page 9 MEMO...
  • Page 10 PJ750-2 Printed in Japan (J)