ViewSonic PJ501 - 3 Panel LCD Video Projector Manual de usuario

Service Manual

ViewSonic PJ501/PJ551

Model No. VPROJ25048-1W/

VPROJ25049-1W

Color Super Bright XGA LCD

Ultra-Portable Projector

(PJ501/PJ551_SM_623 - Rev. 1a – October 2002)

ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583



reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or

computer language, in any form or by any means, electronic, mechanical, magnetic, optical,

chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.

Disclaimer

ViewSonic makes no representations or warranties, either expressed or implied, with respect to the

contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular

purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from

time to time in the contents hereof without obligation of ViewSonic to notify any person of such

revision or changes.

Trademarks

ViewSonic is a registered trademark of ViewSonic Corporation. All other trademarks used within this

document are the property of their respective owners.

Revision History

Revision Date Description Of Changes Approval

1a 10/18/02 Initial Issue – DCN2765 T. Thai

ii PJ501/PJ551 Service Manual

iii PJ501/PJ551 Service Manual

TABLE OF CONTENTS

CAUTION AND SERVICE WARNING................................................................................................1

1. FEATURES..........................................................................................................................................2

2. SPECIFICATIONS .............................................................................................................................2

3. LOCATION OF FEATURES, CONTROLS, AND I/O ..................................................................3

4. ADJUSTMENT ...................................................................................................................................5

5. TROUBLESHOOTING......................................................................................................................12

6. ASSEMBLY REMOVAL, REPLACEMENT, AND MAINTENANCE ........................................17

7. BLOCK DIAGRAM............................................................................................................................23

8. INTERCONNECTION DIAGRAM..................................................................................................24

9. WIRING DIAGRAM ..........................................................................................................................25

10. CIRCUIT DIAGRAMS ....................................................................................................................36

11. DISASSEMBLY/EXPLODED PARTS DIAGRAMS....................................................................51

12. REPLACEMENT PARTS LIST......................................................................................................53

13. RS-232C COMMUNICATION PROTOCOL .................................................................................54

SERVICE MANUAL

Be sure to read this manual before servicing. To assure safety from re, electric shock, injury, harmful radia-

tion and materials, various measures are provided in this Multimedia LCD Projector. Be sure to read caution-

ary 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

PJ501 / PJ551

ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

1. Features

1,500 ANSI lumens, 2.7kg(6lbs)

Easy and flexible keystone adjustment

My screen

Wide angle lens

Low noise

2. Specifications

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ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

Parts names

Remote Control Sensor

COMPONENT

Y Terminal

CB/PB Terminal

CR/PR Terminal

S-VIDEO Terminal

RESET Button

KEYSTONE Button

INPUT Button

STANDBY/ON Button

Foot Adjuster Button

Air Filter and Intake

(for the Cooling Fan)

Speaker

Rear Foot Adjuster

LAMP Indicator

TEMP Indicator

POWER Indicator

MENU Button

Ventilation Openings

(Exhaust)

Terminal Panel (Refer below)

RGB Terminal

CONTROL Terminal

AUDIO Terminal

AUDIO

R Terminal

L Terminal

VIDEO Terminal

Power Switch

AC Inlet

(to the Power Cord)

Ventilation Openings

(Intake)

Zoom Knob

Focus Ring

Remote Control Sensor

Lens (with Lens cap)

Foot Adjuster

Control Panel

FRONT / LEFT / VIEW

REAR / RIGHT / VIEW

TERMINAL PANEL

ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

3. Location of Features, Controls, and I/O

Remote control

SEARCH Button

RGB Button

VIDEO Button

ASPECT Button

MAGNIFY

ON Button

OFF Button

FREEZE Button

POSITION Button

[Left] Arrow Button

ENTER Button

ESC (Escape) Button

[Down] Arrow Button

STANDBY/ON Button

AUTO Button

BLANK Button

VOLUME Button

MUTE Button

KEYSTONE Button

MENU Button

[Up] Arrow Button

[Right] Arrow Button

RESET Button

ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

4-2 Ghost adjustment

Signals for internal adjustment







Adjustment procedure

1. Use DAC-P - GHOST - R: in the Adjustment menu

to adjust so that R color ghost is at a minimum.

(Set the adjustment value to default, and then raise the

value. When a ghost appears to the left of a vertical

line, reduce the value by 2 steps.)

2. In the same way, use DAC-P - GHOST-G: in the

Adjustment menu to adjust so that G color ghost is

at a minimum.

3. In the same way, use DAC-P - GHOST-B: in the

Adjustment menu to adjust so that B color ghost is

at a minimum.

4. Adjustment

4-1 Before adjusting

4-1-1 Selection of adjustment

When any parts in the table 4-1 are changed, choose

the proffer adjusting items with the chart.

Table 4-1: Relation between the replaced part and adjustment

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

















































means need for adjustment.

means not need for adjustment.

means recommended.

4-1-2 Setting of condition before adjustment

1. Before starting adjustment, warm up the projector

for about 10 minutes.(Blank white)

2. Set Zoom Wide to Max. And project an image with

more than 40 inches in diagonal size.

3. Normalizing the video adjustment.

(Press the [MENU] button of the Remote control

transmitter to display the MAIN menu, and then press

the [RESET] button. And select the [DEFAULT]. Next,

open MAIN menu and press the [ ] key to display

the PICTURE1 menu, then press the [RESET] key to

set to [DEFAULT].)

*note :The MAIN and PICTURE1 menu is not reset

with no signal.

4. Set the normal at OPT-WHISPER in the menu.

5. Reset KEYSTONE correction.

6. Perform all adjustments from the Adjustment menu.

Perform the following operations to display the

Adjustment menu.

a. Press the [MENU] button of the Remote control

transmitter (the Setup menu will appear).

b. Next, press the [RESET] button one time. And

press the [RESET] button again for 5 seconds

or more (the Adjustment menu will appear).

ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

4-4

PSIG-G adjustment (vertical stripe adjustment)

Signals for internal adjustment Adjustment procedure

1. Make this adjustment after completing the

adjustment in 4-3 Flicker adjustment.

2. Use DAC-P - PSIG - G: in the Adjustment menu to

adjust so that the vertical lines spaced every 6 or

12 dots are as inconspicuous as possible.













4-4-1

PSIG-B adjustment (vertical streaks adjustment)

Signals for internal adjustment







Adjustment procedure

1. Make this adjustment after completing the

adjustment in 4-3 Flicker adjustment.

2. Use DAC-P - PSIG - B: in the Adjustment menu to

adjust so that the vertical streaks on the upper of

window pattern.

PJ501 ONLY

4-3 Flicker adjustment

(V.COM adjustment)

Signals for internal adjustment Adjustment procedure

1. Make this adjustment after completing the

adjustment in 4-2 Ghost adjustment.

2. Use DAC-P - V.COM - R: in the Adjustment menu

to adjust so that the flicker at the center of the

screen is less than the flicker at the periphery.

(When the flicker is about the same across the

whole screen, adjust so that the flicker at the

center of the screen is somewhat less than

elsewhere.)

3. In the same way, use DAC-P - V.COM-G: in the

Adjustment menu to adjust the G color flicker.

4. In the same way, use DAC-P - V.COM-B: in the

Adjustment menu to adjust the B color flicker.

ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

4-5

White balance adjustment (visual inspection)

Preparations

1. Perform these adjustments after the PSIG

adjustment described in Section 4-4.

2. Reset gamma correction before adjustment.

Place the cursor on [GAMMA] in the Adjustment

menu, press the [RESET] key and select

[DEFAULT].

Adjustment procedure

1. First, adjust the G color.

2. Select GAMMA, SUB-CONTRAST, and G: in the

Adjust menu. If the background is white solid,

press the [MENU SELECT] key on the Remote

control transmitter to change to [G] monochrome in

the 28-tone grayscale.

3. Adjust GAMMA, SUB-CONTRAST, and G: in the

Adjust menu so that brightness of 28 steps is best.

4. Don’t adjust GAMMA, SUB-BRIGHT, and G: in the

Adjust menu. Because we want to keep the best

contrast ratio.

5. Then adjust colors R and B.

6. Select GAMMA, SUB-CONTRAST, and G: in the

Adjust menu. If the background is white solid,

press the [MENU SELECT] key on the Remote

control trasmitter to change to [W] monochrome in

the 28-tone grayscale.

7. Adjust GAMMA, SUB-BRIGHT, R: and B: in the

Adjust menu so that low-brigtness white balance is

best.

8. Adjust GAMMA, SUB-CONTRAST, R: and B: in the

Adjust menu so that middle-brightness white

balance is best.

9. Repeat steps 7 to 8 above, and adjust so that

brightness white balance of 28 steps is best.

4-4

NRSH adjustment (vertical stripe adjustment)

Signals for internal adjustment

































Adjustment procedure

1. Make this adjustment after completing the

adjustment in 4-3 Flicker adjustment.

2. Use DAC-P - NRSH - R: in the Adjustment menu to

adjust so that the vertical lines spaced every 6 dots

are as inconspicuous as possible.

(Reduce the adjustment value when black stripes

appear in the 2nd or 3rd tone from the black side.

Note that when the adjustment value is lowered,

white stripes may appear in the 2nd or 3rd tone

from the bright side. Should this happen, adjust so

that the stripes are as inconspicuous as possible.)

3. In the same way, use DAC-P - NRSH - G: in the

Adjustment menu to adjust vertical stripes of G color.

4. In the same way, use DAC-P - NRSH - B: in the

Adjustment menu to adjust vertical stripes of B color.

PJ551 ONLY

ViewSonic Corporation

Confidential - Do Not Copy

PJ501/PJ551

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