ViewSonic PJ501 - 3 Panel LCD Video Projector Manuale utente
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)
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright
2002 by ViewSonic Corporation. All rights reserved. No part of this publication may be
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 specied.
Service Warning
PJ501 / PJ551
ViewSonic Corporation
Confidential - Do Not Copy
PJ501/PJ551
1
3
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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Confidential - Do Not Copy
PJ501/PJ551
2
2
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
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Confidential - Do Not Copy
PJ501/PJ551
3. Location of Features, Controls, and I/O
3
5
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
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PJ501/PJ551
4
4
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
:
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).
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PJ501/PJ551
5
7
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.
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PJ501/PJ551
6
6
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
7
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