LG RD-JT20 XGA User manual

DLP PROJECTOR
USER’S GUIDE
Thank you for purchasing the DLP Projector.
Please read this user’s guide to ensure correct use of the device. Save this user’s
guide for future reference.
OUTLINE
This DLP Projector can display various computer signals and NTSC/PAL/SECAM video
signals.
FEATURES
1. High Brightness
2. High Resolution
3. Compact Size, Feather Weight for Portability
4. Durable Magnesium Alloy Body
5. RGB input Terminal
6. One Touch Auto-Adjustment Function
7. Easy Keystone Adjustment

Copyright
Copyright © 2002. 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 the company.
Disclaimer
The company makes no representations or warranties, either expressed or implied, with
respect to the contents hereof and specifically disclaims any warranties, merchantability or
fitness for any particular purpose. Furthermore, the company reserves the right to revise this
publication and to make changes from time to time in the contents hereof without obligation of
the company to notify any person of such revision or changes.

Table of Contents
iii
DLP Personal Projector
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FCC Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Shipping Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Projector Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Projector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
External Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Projector Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Control Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installing or Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Screen Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting to Various Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Digital Keystone Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Auto Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Menu System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1. Display Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2. Image Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3. Source Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4. Control Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5. PIP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Lamp Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Use and Replacement of Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
LED Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Lamp Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 20
Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 22
Projector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Timing Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

DLP Personal Projector 1
INTRODUCTION
Caution
TO PREVENT SHOCK, DO NOT OPEN THE CABINET. NO USER –SERVICE-
ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSON-
NEL. PLEASE READ THIS USER’S GUIDE BEFORE YOU OPERATE YOUR
PROJECTOR. SAVE THIS USER’S GUIDE FOR FUTURE REFERENCE .
Safety Instructions
1. Read this user’s guide before you operate your projector and save it for future
reference.
2. The lamp becomes extremely hot during operation. Allow the projector to cool
for approximately 45 minutes prior to removing the lamp assembly for
replacement. Do not operate lamps beyond the rated lamp life. Excessive
operation of lamps beyond the rated life could cause them to explode on rare
occasions.
3. Never replace lamp assembly or any electronic components unless the
projector is unplugged.
4. To reduce the risk of electric shock, do not disassemble this appliance. Take it
to a qualified technician when service or repair is required. Incorrect
reassembly can cause electric shock when the appliance is subsequently used.
5. Do not place this product on an unstable cart, stand, or table. The product may
fall, causing serious damage to the product. This product is capable of
displaying inverted images for ceiling mount installation. Please use suitable
equipment for mounting the unit and ensure it is securely installed.
6. To prevent lamps from bursting, change the lamp after changing the mounting
position of projectors (desktop to ceiling mount or ceiling mount to desktop
mount).
Caution
• Always open the lens shutter or remove the lens cap when the projector
lamp is on.
• Do not look straight at the projector lens during operation. The intense
light beam may damage your eyesight.
• In some countries, the line voltage is NOT stable. This projector is
designed to operate safely within a bandwidth of 100 to 240 volts, but
could fail if power cuts or surges of ±10 volts occur. In these high-risk
areas, it is recommended to install a power stabilizer unit.
• Do not place this projector on the top of cloth or carpet.
• Do not touch the ventilation grill when the projector is under operation.

2DLP Personal Projector
FCC Statement
CLASS B
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the distance between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.
Save this user’s guide: The information contained in this manual will assist you in
operating and maintaining your Personal Projector.

DLP Personal Projector 3
Shipping Contents
The Projector is shipped with the necessary cables required for standard PC,
Macintosh or laptop computer connections.Carefully unpack and verify that you
have all the items shown below. If any of these items are missing, please contact
your place of purchase.
Optional Accessories
1. Spare lamp kit
2. Mac Adapter
Projector User’s Manual Remote Control
Batteries
3-2 Converter
Audio Cable 220V 240V
Power Cord
110V
HDTV Cable VGA Cable
S-Video Cable Video Cable
Deluxe Soft Carry Case

4DLP Personal Projector
Projector Description
Projector
1. External control panel
(see next page)
2. Projection lens
3. Front adjustment feet
4. IR remote sensor
5. Ventilation grill
6. Kensington lock
7. AC power cord input
8. S-video connector
9. Video connector
10. D-sub connector
(for computer/ input)
11. Audio input
12. Rear adjustment feet
13. Lamp access door
(underneath unit)
5
12

DLP Personal Projector 5
External Control Panel
•TheInfrared Remote Receiver (Front and Rear) allows the projector to
accept signals from the remote control. For best results, be sure to aim the
control toward the sensor without any obstructions between the two, and at a
distance no greater than 6 meters.
•Menu will display the menu system on screen. Press Menu again to access the
sub-menus. Left and Right help you navigate among choices and settings in
the menus and sub-menus. However, when the onscreen menu is not
activated, the Left and Right buttons will function as Keystone +/- hot keys.
• Press the Exit button to go back to the main menu. Press Exit again to leave
the menu system.
•TheStatus Indicator will blink or light up when the lamp needs service, cooling
or replacement. See “Lamp Information” on page 19. for more detailed
information.
• When the projector is on, back-lit Power will blink during warm-up and turn to
solid green to indicate the projector is ready for use.
• Press Power for 1 second to turn the projector on or off.
•Auto key: Automatically sense the best picture quality for current received
signals.
•Source key: Select signal sources, PC, Video, S-video and YPbPr.
EXIT
MENU
KEY
STONE
KEY
STONE
AUTO SOURCE POWER
+
-
- Keystone / Left
Menu
Exit
Keystone +/ Right
Lamp status indicator

6DLP Personal Projector
Adjuster
The projector is equipped with a quick-release adjuster foot and button for adjusting
its tilt angle.
1. Lift the projector up and press the adjuster button to release the adjuster.
2. The adjuster will drop into position and be locked.
Projector Features
The Projector integrates high performance optical engine projection and user-
friendly design to deliver high reliability and ease of use experience.
The Projector offers the following features:
• Compact and portable unit
• Full-function remote control
• Manual zoom lens
• One key auto-adjustment to display the best picture quality
• Easy digital keystone correction through hot keys to correct tilted pictures
• Adjustable color balance control for data/video
• Ultra-high brightness projection lamp
• Ability to display high quality 16.7 million colors
• On screen menus in 8 languages: English, French, German, Italian, Spanish,
Japanese, Korean and Simplified Chinese.
• Powerful AV function to provide high AV picture results.
• HDTV compatibility (YPbPr)
Note: The brightness of your machine will vary depending on the ambient
room conditions and contrast/brightness settings.

DLP Personal Projector 7
Remote Control Description
Remote Control Features
The remote control sensors are located in the front/ back of the projector. The
distance between the sensor and the remote control should not exceed 6 meters.
Keystone
Power Source
Volume
PIP Video PIP S-video
Return
Exit
Auto
Menu
Mute
Zoom in
Freeze
Zoom out
Blank
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8DLP Personal Projector
FREEZE
The image can be frozen when FREEZE is pressed. A “Pause” icon will appear in
the lower right corner of the screen for three seconds. To release the freeze
function, again press the FREEZE button, RETURN button or SOURCE button
(when the input source is switched over during display). A “Play” icon will appear in
the lower right corner of the screen for three seconds when the freeze function is
released.
BLANK
The image can be blank when BLANK is pressed. To release the blank function,
press BLANK again.
ZOOM +/ -
By pressing ZOOM +, the center of the picture will be magnified. When the +button
is pressed again, the picture is further magnified, up to four times the original size.
By pressing ZOOM -, the size of the image is reduced. When the -button is pressed
again, the picture is further reduced until it is restored to its original size. To return to
the normal display mode, press the RETURN button. (This function can be used in
combination with FREEZE. )
After activating the zoom in function, you can pan the screen with the following
buttons.
A
Menu Move downward to the bottom.
Exit Move upward to the top.
Left (Keystone -) Move toward to the left side.
Right (Keystone +) Move toward to the right side.

DLP Personal Projector 9
Installing or Replacing Batteries
• Push and slide the battery compartment lid in the direction shown.
• Install battery as indicated by the diagram inside the compartment.
• Position the lid over the compartment and snap it back into place.
Caution
Avoid excessive heat and humidity. Danger of explosion may happen if bat-
tery is incorrectly replaced. Replace only with the same or equivalent type
recommended by the manufacturer. Dispose of used batteries according to
the manufacturer’s instructions.

10 DLP Personal Projector
INSTALLATION
Screen Size
Place the projector at the required distance from the screen according to the desired
picture size (see the table below).
Connecting to Various Equipment
It only takes a few seconds to connect your projector to your computer/notebook,
VCR or other systems. However, a Mac adapter (an optional accessory) is needed
for connection for Macintosh users.
Screen Size (Max.) L. Projection
distance (cm)
Screen Size (Min.)
Diagnal
(in)
A.Width
(cm)
C. Height
(cm)
Diagnal
(in)
B. Width
(cm)
D. Height
(cm)
30.4 61.8 46.3 100 24.9 50.7 38.0
60.8 123.7 92.7 200 49.9 101.3 76.0
91.2 185.3 138.9 300 74.7 151.9 113.9
121.5 247.0 185.2 400 99.7 202.5 151.9
151.9 308.7 231.6 500 124.6 253.2 189.9
182.3 370.5 277.9 600 149.5 303.8 227.9
212.8 432.2 324.2 700 174.6 354.4 266.2
243.1 494.0 370.5 800 199.4 405.1 303.8
273.5 555.7 416.7 900 224.3 455.7 341.8
303.9 617.5 463.1 1000 249.2 506.3 379.8
L Projetion Distance
Audio
Video
S-Video
Computer/
HDTV
S-Video/
Video

DLP Personal Projector 11
OPERATION
Start Up
1. Plug the power cord into a wall socket.
2. Press POWER for 1 second.
• The back-lit POWER key blinks green and stays green when the power is
turned on.
(When the power is turned off, there is a 60-second cooling period before the
projector can be re-started.)
3. Switch on all connected equipment.
AUTO
AUTO
Projector Remote Control

12 DLP Personal Projector
Digital Keystone Correction
Keystoning is when the projected image is noticeably wider on either the top or
bottom. To correct this, press KEYSTONE +/- (hot key) on the control panel of the
projector or on the remote control, then adjust the sliding bar labeled Keystone, as
needed. Press + to correct keystoning at the top of the image. Press -to correct
keystoning at the bottom of the image.
Auto Adjustment
In some cases, you may have to optimize the picture quality manually. To do this,
press the AUTO key on the control panel of the projector or on the remote control.
Within 3 seconds, the built-in Intelligent Auto Adjustment function will re-adjust to
the best picture quality.
KEY
STONE +
KEY
STONE -
Projector
Remote control
AUTO
AUTO
Projector Remote control

DLP Personal Projector 13
Source Selection
When several input sources are available, press the SOURCE key to make a
selection from the control panel of the projector or the remote control.
Menu System
Press Menu for the main menu and press 3or 4to select a sub-menu. Press
Menu again to select items in the sub-menu.
SOURCE
SOURCE
Projector Remote control
Menu Bar
Sub-menu Display Image Source Control PIP
PC
Keystone
Brightness
Contrast
Phase
H.Size
Auto resize
H-position
V-position
Color Temp
Information
Mirror
Source
Volume
Treble
Bass
Mute
Langauge
OSD
OSD Time
Auto Off
Reset
Lamp hour
Main page:
PIP Source
PIP size
PIP Pos.
H. Position
V.Position
More Options
Sub Page:
Brightness
Contrast
Color
Tint
Sharpness
System
Y/Pb/Pr
Auto resize
H-position
V-position
Color
Tint
Color Temp
Video
Keystone
Brightness
Contrast
Color
Tint
Ratio
System
Sharpness
Color temp
Information

14 DLP Personal Projector
1. Display Menu
Keystone
Corrects the keystone of the image.
Brightness
Adjusts the brightness of image.
Contrast
Adjusts the degree of difference between darkness and lightness of
image.
Phase
Adjusts to fit in the desired image size.
*This function is not available when the input mode are Video, S-video.
H.Size Adjusts to avoid the occurrence of flicker.
*This function is not available when the input modes are Video, S-video.
Color Adjusts to increase or decrease the colors (R, G, B) of image.
*This function is not available when the input mode is PC.
Tint Adjusts to make the image look more red or blue.
*This function is not available when the input mode is PC.

DLP Personal Projector 15
2. Image Menu
Auto resize
Makes the best fit of the image to the screen,
H-position
Adjusts the horizontal position of image.
V-position
Adjusts the vertical positon of image.
Color Temp. Adjusts the color templerature to fit your preference.
Information Shows the current resolution.
Ratio
Users have 2 options for the image ratio.
1. 4:3 (Normal) 2. 16:9 (Wide)
*This function is not available when the input modes are PC, YPbPr.
System
4 modes can be selected.
1. Auto 2. PAL-M 3. PAL-N 4.SECAM
*The default setting of System is Auto.
*This function is not available when the input modes are PC, YPbPr.
Sharpness Adjusts to make the image look sharper or softer.
*This function is not available when the input mode are PC, YPbPr.
Color Adjusts to increase or decrease the colors (R, G, B) of image.
*This function is not available when the input mode is PC.
Tint Adjusts to make the image look more red or blue.
*This function is not available when the input mode is PC.

16 DLP Personal Projector
3. Source Menu
Mirror
1. Default
2. Ceiling -
mounted
projection
3. Rear screen
projection
4. Ceiling -
mounted and
rear screen
projection
Source Selects sources between PC, Video, S-Video, and YPbPr.
Volume
Adjusts the volume level.
Treble
Adjusts the treble level.
Bass
Adjusts the bass level.
Mute
1. 2.
3. 4.
Off On