ViewSonic PJ750-2 Manuel utilisateur

PJ750-2

SERVICE MANUAL

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Multimedia LCD Projector

March 2002

Be sure to read this manual before servicing. To assure safety from re, 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.

Caution

1. When replace the lamp, to avoid burns to your ngers. The lamp becomes too hot.

2. Never touch the lamp bulb with a nger 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 specied.

Service Warning

1. Features --------------------------------------------------- 2

2. Specications--------------------------------------------- 2

3. Names of each part ------------------------------------- 3

4. Adjustment ------------------------------------------------ 5

5. Troubleshooting ---------------------------------------- 12

6. Service points ------------------------------------------ 17

7. Block diagram ------------------------------------------ 22

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

Contents

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.

1213

1415

Control jack

D-sub 15-pin shrink jack

Projector Computer

Communications setting

19200bps, 8N1

1 Protocol

Consist of header (7 bytes) + command data (6 bytes).

2 Header

BE + EF + 03 + 06 + 00 + CRC_low + CRC_high.

CRC_low : Lower byte of CRC ag for command data.

CRC_high : Upper byte of CRC ag for command data.

3 Command data

Command data chart

byte_0 byte_1

Action

low high

byte_2 byte_3

Type

low high

byte_4 byte_5

Setting code

low high

Action Classification Content

Action (byte_0 - 1)

1 SET Change setting to desired value.

2 GET Read projector internal setup value.

4 INCREMENT Increment setup value by 1.

5 DECREMENT Decrement setup value by 1.

6 EXECUTE Run a command.

GND

SELO

RTS

DTR

GND

DSR

RTS

DTS

12 3 4 5

6 7 89

RS-232C jack

D-sub 9-pin

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.

(2) The projector changes the setting based on the above setting code.

(3) The projector returns the response code ‘06H’ to the computer.

Using the projector default settings (Reset Command)

(1) The computer sends the default setting code Header + Command data (‘06H’+‘00H’+ type (2 bytes)

+‘00H’+‘00H’) to the projector.

(2) The projector changes the specified setting to the default value.

(3) The projector returns the response code ‘06H’ to the computer.

Increasing the projector setting value (Increment command)

(1) The computer sends the increment code Header + Command data (‘04H’+‘00H’+ type (2 bytes) +‘00H’+‘00H’) to

the projector.

(2) The projector increases the setting value on the above setting code.

(3) The projector returns the response code ‘06H’ to the computer.

Decreasing the projector setting value (Decrement command)

(1) The computer sends the decrement code Header + Command data (‘05H’+‘00H’+ type (2 bytes) +‘00H’+‘00H’)

to the projector.

(2) The projector decreases the setting value on the above setting code.

(3) The projector returns the response code ‘06H’ to the computer.

When a command sent by the projector cannot be understood by the computer

When the command sent by the projector cannot be understood, the error command ‘15H’ is returned by the

computer. Some times, the projector ignores RS-232C commands during other works. If the error command ‘15H’ is

returned, please send the same command again.

When data sent by the projector cannot be practice

When the command sent by the projector cannot be practiced, the error code ‘1cH’ +‘xxxxH’ is returned.

When the data length is greater than indicated by the data length code, the projector will ignore the excess data code.

Conversely, when the data length is shorter than indicated by the data length code, an error code will be returned to

the projector.

NOTE:

Operation cannot be guaranteed when the projector receives an undefined command or data.

Provide an interval of at least 40ms between the response code and any other code.

The projector outputs test data when the power supply is switched ON, and when the lamp is lit. Ignore this data.

Commands are not accepted during warm-up.

Names Operation type Header Command data

CRC Action Type Setting code

Blank Color Set

Red BE EF 03 06 00 3B D3 01 00 00 30 00 00

Orange BE EF 03 06 00 AB D2 01 00 00 30 01 00

Green BE EF 03 06 00 5B D2 01 00 00 30 02 00

Blue BE EF 03 06 00 CB D3 01 00 00 30 03 00

Purple BE EF 03 06 00 FB D1 01 00 00 30 04 00

White BE EF 03 06 00 6B D0 01 00 00 30 05 00

Black BE EF 03 06 00 9B D0 01 00 00 30 06 00

Get BE EF 03 06 00 08 D3 02 00 00 30 00 00

Mirror Set

Normal BE EF 03 06 00 C7 D2 01 00 01 30 00 00

H Inverse BE EF 03 06 00 57 D3 01 00 01 30 01 00

V lnverse BE EF 03 06 00 A7 D3 01 00 01 30 02 00

H&V Inverse BE EF 03 06 00 37 D2 01 00 01 30 03 00

Get BE EF 03 06 00 F4 D2 02 00 01 30 00 00

Freeze Set Normal BE EF 03 06 00 83 D2 01 00 02 30 00 00

Freeze BE EF 03 06 00 13 D3 01 00 02 30 01 00

Get BE EF 03 06 00 B0 D2 02 00 02 30 00 00

Menu Color Set

Red BE EF 03 06 00 7F D3 01 00 03 30 00 00

Orange BE EF 03 06 00 EF D2 01 00 03 30 01 00

Green BE EF 03 06 00 1F D2 01 00 03 30 02 00

Blue BE EF 03 06 00 8F D3 01 00 03 30 03 00

Purple BE EF 03 06 00 BF D1 01 00 03 30 04 00

Transparent BE EF 03 06 00 2F D0 01 00 03 30 05 00

Gray BE EF 03 06 00 DF D0 01 00 03 30 06 00

Get BE EF 03 06 00 4C D3 02 00 03 30 00 00

Startup Set Turn ON BE EF 03 06 00 0B D2 01 00 04 30 00 00

Turn OFF BE EF 03 06 00 9B D3 01 00 04 30 01 00

Get BE EF 03 06 00 38 D2 02 00 04 30 00 00

Language Set

English BE EF 03 06 00 F7 D3 01 00 05 30 00 00

Français BE EF 03 06 00 67 D2 01 00 05 30 01 00

Deutsch BE EF 03 06 00 97 D2 01 00 05 30 02 00

Español BE EF 03 06 00 07 D3 01 00 05 30 03 00

Italiano BE EF 03 06 00 37 D1 01 00 05 30 04 00

Norsk BE EF 03 06 00 A7 D0 01 00 05 30 05 00

Nederlands BE EF 03 06 00 57 D0 01 00 05 30 06 00

PortuguêsBE EF 03 06 00 C7 D1 01 00 05 30 07 00

Japanese BE EF 03 06 00 37 D4 01 00 05 30 08 00

Get BE EF 03 06 00 C4 D3 02 00 05 30 00 00

Command data chart

Names Operation type Header Command data

CRC Action Type Setting code

Magnify

Get BE EF 03 06 00 7C D2 02 00 07 30 00 00

Increment BE EF 03 06 00 1A D2 04 00 07 30 00 00

Decrement BE EF 03 06 00 CB D3 05 00 07 30 00 00

Auto off

Get BE EF 03 06 00 08 86 02 00 10 31 00 00

Increment BE EF 03 06 00 6E 86 04 00 10 31 00 00

Decrement BE EF 03 06 00 BF 87 05 00 10 31 00 00

Brightness Reset Execute BE EF 03 06 00 58 D3 06 00 00 70 00 00

Contrast Reset Execute BE EF 03 06 00 A4 D2 06 00 01 70 00 00

V.Position Reset Execute BE EF 03 06 00 E0 D2 06 00 02 70 00 00

H.Position Reset Execute BE EF 03 06 00 IC D3 06 00 03 70 00 00

H.Size Reset Execute BE EF 03 06 00 68 D2 06 00 04 70 00 00

Color Balance R Reset Execute BE EF 03 06 00 94 D3 06 00 05 70 00 00

Color Balance B Reset Execute BE EF 03 06 00 D0 D3 06 00 06 70 00 00

Sharpness Reset Execute BE EF 03 06 00 C4 D0 06 00 09 70 00 00

Color Reset Execute BE EF 03 06 00 80 D0 06 00 0A 70 00 00

Tint Reset Execute BE EF 03 06 00 7C D1 06 00 0B 70 00 00

Keystone_V Reset Execute BE EF 03 06 00 08 D0 06 00 0C 70 00 00

Auto Execute BE EF 03 06 00 91 D0 06 00 0A 20 00 00

Blank on/off Set off BE EF 03 06 00 FB D8 01 00 20 30 00 00

on BE EF 03 06 00 6B D9 01 00 20 30 01 00

Get BE EF 03 06 00 C8 D8 02 00 20 30 00 00

Error Status Get

BE EF 03 06 00 D9 D8 02 00 20 60 00 00

(Example of Return)

00 00 01 00 02 00 03 00

(Normal) (Cover-error) (Fan-error) (Lamp-error)

04 00 05 00 06 00

(Temp-error) (Air flow-error) (Lamp-Time-over)

Power

Set OFF

BE EF 03 06 00 2A D3 01 00 00 60 00 00

BE EF 03 06 00 BA D2 01 00 00 60 01 00

Get

BE EF 03 06 00 19 D3 02 00 00 60 00 00

Input Source Set

RGB1 BE EF 03 06 00 FE D2 01 00 00 20 00 00

RGB2 BE EF 03 06 00 3E D0 01 00 00 20 04 00

Video BE EF 03 06 00 6E D3 01 00 00 20 01 00

SVideo BE EF 03 06 00 9E D3 01 00 00 20 02 00

Component

BE EF 03 06 00 AE D1 01 00 00 20 05 00

Get BE EF 03 06 00 CD D2 02 00 00 20 00 00

Volume

Get BE EF 03 06 00 31 D3 02 00 01 20 00 00

Increment BE EF 03 06 00 57 D3 04 00 01 20 00 00

Decrement BE EF 03 06 00 86 D2 05 00 01 20 00 00

Command data chart

Names Operation type Header Command data

CRC Action Type Setting code

Mute Set Normal BE EF 03 06 00 46 D3 01 00 02 20 00 00

Mute BE EF 03 06 00 D6 D2 01 00 02 20 01 00

Get BE EF 03 06 00 75 D3 02 00 02 20 00 00

Brightness

Get BE EF 03 06 00 89 D2 02 00 03 20 00 00

Increment BE EF 03 06 00 EF D2 04 00 03 20 00 00

Decrement BE EF 03 06 00 3E D3 05 00 03 20 00 00

Contrast

Get BE EF 03 06 00 FD D3 02 00 04 20 00 00

Increment BE EF 03 06 00 9B D3 04 00 04 20 00 00

Decrement BE EF 03 06 00 4A D2 05 00 04 20 00 00

Color

Balance R

Get BE EF 03 06 00 01 D2 02 00 05 20 00 00

Increment BE EF 03 06 00 67 D2 04 00 05 20 00 00

Decrement BE EF 03 06 00 B6 D3 05 00 05 20 00 00

Color

Balance B

Get BE EF 03 06 00 45 D2 02 00 06 20 00 00

Increment BE EF 03 06 00 23 D2 04 00 06 20 00 00

Decrement BE EF 03 06 00 F2 D3 05 00 06 20 00 00

Keystone_V

Get BE EF 03 06 00 B9 D3 02 00 07 20 00 00

Increment BE EF 03 06 00 DF D3 04 00 07 20 00 00

Decrement BE EF 03 06 00 0E D2 05 00 07 20 00 00

Aspect Set

4:3, Full BE EF 03 06 00 9E D0 01 00 08 20 00 00

16:9 BE EF 03 06 00 0E D1 01 00 08 20 01 00

Small BE EF 03 06 00 FE D1 01 00 08 20 02 00

Get BE EF 03 06 00 AD D0 02 00 08 20 00 00

Display

Position at

16 : 9 or Small

Set

Default BE EF 03 06 00 62 D1 01 00 09 20 00 00

Bottom BE EF 03 06 00 F2 D0 01 00 09 20 01 00

Top BE EF 03 06 00 02 D0 01 00 09 20 02 00

Get BE EF 03 06 00 51 D1 02 00 09 20 00 00

V.Position

Get BE EF 03 06 00 0D 83 02 00 00 21 00 00

Increment BE EF 03 06 00 6B 83 04 00 00 21 00 00

Decrement BE EF 03 06 00 BA 82 05 00 00 21 00 00

H.Position

Get BE EF 03 06 00 F1 82 02 00 01 21 00 00

Increment BE EF 03 06 00 97 82 04 00 01 21 00 00

Decrement BE EF 03 06 00 46 83 05 00 01 21 00 00

H.Size

Get BE EF 03 06 00 B5 82 02 00 02 21 00 00

Increment BE EF 03 06 00 D3 82 04 00 02 21 00 00

Decrement BE EF 03 06 00 02 83 05 00 02 21 00 00

H.Phase

Get BE EF 03 06 00 49 83 02 00 03 21 00 00

Increment BE EF 03 06 00 2F 83 04 00 03 21 00 00

Decrement BE EF 03 06 00 FE 82 05 00 03 21 00 00

Command data chart

Names Operation type Header Command data

CRC Action Type Setting code

Sharpness

Get BE EF 03 06 00 F1 72 02 00 01 22 00 00

Increment BE EF 03 06 00 97 72 04 00 01 22 00 00

Decrement BE EF 03 06 00 46 73 05 00 01 22 00 00

Color

Get BE EF 03 06 00 B5 72 02 00 02 22 00 00

Increment BE EF 03 06 00 D3 72 04 00 02 22 00 00

Decrement BE EF 03 06 00 02 73 05 00 02 22 00 00

Tint

Get BE EF 03 06 00 49 73 02 00 03 22 00 00

Increment BE EF 03 06 00 2F 73 04 00 03 22 00 00

Decrement BE EF 03 06 00 FE 72 05 00 03 22 00 00

Video Format Set

Auto BE EF 03 06 00 9E 75 01 00 00 22 0A 00

NTSC BE EF 03 06 00 FE 71 01 00 00 22 04 00

PAL BE EF 03 06 00 6E 70 01 00 00 22 05 00

SECAM BE EF 03 06 00 6E 75 01 00 00 22 09 00

NTSC 4.43 BE EF 03 06 00 5E 72 01 00 00 22 02 00

M-PAL BE EF 03 06 00 FE 74 01 00 00 22 08 00

N-PAL BE EF 03 06 00 0E 71 01 00 00 22 07 00

Get BE EF 03 06 00 0D 73 02 00 00 22 00 00

HDTV

Set 1080i BE EF 03 06 00 F2 73 01 00 05 22 00 00

1035i BE EF 03 06 00 62 72 01 00 05 22 01 00

Get BE EF 03 06 00 C1 73 02 00 05 22 00 00

Command data chart

Names Operation type Header Command data

CRC Action Type Setting code

Sync on G Set off BE EF 03 06 00 CB D0 01 00 08 30 01 00

on BE EF 03 06 00 5B D1 01 00 08 30 00 00

Get BE EF 03 06 00 68 D1 02 00 08 30 00 00

WHISPER Set NORMAL BE EF 03 06 00 3B 23 01 00 00 33 00 00

WHISPER BE EF 03 06 00 AB 22 01 00 00 33 01 00

Get BE EF 03 06 00 08 23 02 00 00 33 00 00

GAMMA Set

NORMAL BE EF 03 06 00 C7 F0 01 00 A1 30 00 00

CINEMA BE EF 03 06 00 57 F1 01 00 A1 30 01 00

DYNAMIC BE EF 03 06 00 A7 F1 01 00 A1 30 02 00

Get BE EF 03 06 00 F4 F0 02 00 A1 30 00 00

COLOR TEMP

Set NORMAL BE EF 03 06 00 FB F5 01 00 B0 30 00 00

LOW BE EF 03 06 00 6B F4 01 00 B0 30 01 00

Get BE EF 03 06 00 C8 F5 02 00 B0 30 00 00

Command data chart

MEMO

PJ750-2

Printed in Japan (J)

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