LG RD-JT51 User manual

DLP PROJECTOR
USER’S GUIDE
Thank you for purchasing the DLPTM Projector.
Please read this user’s guide to ensure correct use of the device. Save this user’s
guide for future reference.
OUTLINE
This DLPTM 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. RGB Input Terminal
5. One Touch Auto-Adjustment Function
6. Easy Keystone Adjustment

Copyright
Copyright © 2003. 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
EEC 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 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installing or Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Display Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting to Various Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Digital Keystone Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Auto Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Menu System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1. Display Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2. Image Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3. Source Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4. Control Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5. PIP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .23
Lamp Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Use and Replacement of the Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Lamp Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Operative Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . .25

iv DLP Personal Projector
Common Problems & Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Specifications . . . . . . . . . . . . . . . . . . . . . . . . .27
Projector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Timing Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Suppoted timing for Analog RGB input . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Supported timing for YPbPr input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Supported timing for Video and S-Video inputs . . . . . . . . . . . . . . . . . . . . 29
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .30

DLP Personal Projector 1
INTRODUCTION
Caution
TO PREVENT SHOCK, DO NOT OPEN THE CABINET. NO USER –SER-
VICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL. 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 the 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, sustaining serious damage.
6. Do not touch the top cover when the projector is under operation.
7. The projector must be packaged into a carry bag while moving to
another place for operation.
8. To avoid the lamp being damaged, never turn the Main Power Switch off
in the back of the projector during operation. The normal operation
procedures are to turn the power button off, and, after a 90-second
cooling process, turn off the Main Power Switch.

2DLP Personal Projector
Caution
• Always open the lens shutter when the projector lamp is on.
• Do not look straight at the projector lens during operation. The
intense light beam may damage your eyes.
• 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 that a power stabilizer unit be
used in conjuction with this projector.
• Do not place this projector on the top of cloth or carpet.
• Do not touch the ventilation grill when the projector is under opera-
tion.
Save this user’s guide: The information contained in this manual will assist
you in operating and maintaining your 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.
EEC STATEMENT
This machine was tested against the 89/336/EEC (European Economic
Community) for EMC (Electro Magnetic Compatibility) and fulfills these
requirements.

DLP Personal Projector 3
Shipping Contents
The projector is shipped with the cables required for connection to standard
PC or laptop computers. Carefully unpack and verify that you have all the
items shown below. If any of these items are missing, please contact
personnel at the place of purchase.
Optional Accessories
1. 200W lamp module
2. Macintosh adapter
3. Ceiling mount kit
4. Deluxe soft carry case
5. HDTV cable (YPbPr)
TOSHIBA
LITHIUM BATTERY
CR2025
3v
JAPAN
Projector User’s Guide Quick Start Guide
Remote Control Video Cable
VGA Cable
3-2 Converter
S.A. & India
Power Cord
240V 110V
S-Video Cable
Battery
220V

4DLP Personal Projector
Projector Description
Projector
Kensington lock
Rear adjuster foot
RGB (PC / Mac) /
YPbPr signal input
S-Video connector
Video
connector
Main power switch
AC power cord inlet
IR remote sensor
Projection lens adjuster External control panel
(see "External Control Panel" on
page 5 for more detailed information)
Projection lensFront adjuster foot
Ventilation grill
IR remote sensor
Lamp door
Rear adjuster foot

DLP Personal Projector 5
External Control Panel
1. Power indicator
The indicator shows green for a normal
state. When the projector is in Standby
mode, it shows orange toggle. See
"Operative Information" on page 24 for
more detailed information.
2. Temp indicator
The Temp indicator shows red or flashed
red when the system temperature is too
high or has fan problems, which may
occur if the projector is operated
improperly. See "Operative Information"
on page 24 for more detailed information.
3. Lamp Indicator
The Lamp Indicator will light up when the
lamp needs service, cooling or
replacement. See “Lamp Information” on
page 23 and "Operative Information" on
page 24 for more detailed information.
4. POWER
Press and hold the POWER key for 1
second to turn on or off the projector.
5. MENU / EXIT
Brings the OSD menu or leaves the OSD
menu.
6. SOURCE
Selects signal sources from among
Analog RGB, YPbPr, S-Video and
Composite Video.
7. AUTO
Automatically determines the suitable
frequency and clock for current received
signals. The auto adjustment function will
not affect the current brightness and
colors settings.
8. BLANK
Uses BLANK to hide the screen image.
You can press BLANK again or RETURN
to bring the image back.
9. KEYSTONE - 10. KEYSTONE +
Presses KEYSTONE - to correct a image
that is wider at the top. Presses
KEYSTONE + to correct a image that is
wider at the bottom.
9. Left < 10. Right >
11. Up ^ 12. Down v
When the On-Screen Menu system is
activated, the four buttons help you
navigate among choices and settings in
the menus and sub-menus.
AUTO BLANK
SOURCE
KEYSTONE
-
KEYSTONE +
POWER
MENU
/EXIT
2. Temp Indicator
3. Lamp Indicator
4. POWER
5. MENU / EXIT
9
. KEYSTONE - / Left 10.KEYSTONE + / Right
6. SOURCE
8. BLANK
11. Up
7. AUTO
12. DOWN
1. Power Indicator

6DLP Personal Projector
Adjuster
The projector is equipped with 1 quick-release adjuster foot. Push the button
to adjust its tilt angle.
1. Lift the projector up and press the adjuster button to release the
adjuster. The adjuster will drop into position and be locked.
2. Screw the rear adjuster to fine-tune the tilt angle.
Note: The adjuster can only bear the weight of the projector itself .
Please do not place any additional burden on it.
Projector Features
The projector integrates high-performance optical engine projection and a
user-friendly design to deliver high reliability and ease of use.
The projector offers the following features:
• Small and light for portability
• High quality manual zoom lens
• One-key auto-adjustment to display the best picture quality
• Digital keystone correction to correct distorted images
• Adjustable color balance control for data/video display
• Ultra-high brightness projection lamp
• Ability to display 16.7 million colors
• On-screen menus in 8 languages: English, French, German, Italian,
Spanish, Korean, Traditional Chinese and Simplified Chinese
• Switchable Economic mode to adjust the power consumption
• Powerful AV function to provide high quality AV picture
• HDTV compatibility (YPbPr)
Note: The brightness of the projected image will vary depending on the
ambient lighting conditions and contrast / brightness settings.
1. 2

DLP Personal Projector 7
Remote Control Description
The remote control sensors are located in the front/ back of the projector.
Remote Control Functions
1.POWER, MENU/EXIT, SOURCE, AUTO, BLANK
The functions of these buttons are the same as those on the external control
panel. Please refer to "External Control Panel" on page 5 for more
information.
2. 3LEFT / KEYSTONE - ,4RIGHT / KEYSTONE +
Whe the OSD menu is activated, the buttons function as 3Left / 4Right.
For the rest of time, the buttons function as Keystone - / Keystone +.
3. FREEZE
The image can be frozen when FREEZE is pressed. A "Pause" icon will
appear in the lower right corner of the screen. To release the freeze function,
press the FREEZE button again or press RETURN button.
POWER
MENU / EXIT
3LEFT /
KEYSTONE -
AUTO
ZOOM IN
RETURN
PIP POSITION
FREEZE
BLANK
ZOOM OUT
UP
4RIGHT /
KEYSTONE
+
PIP SOURC
E
DOWN
SOURCE

8DLP Personal Projector
4. ZOOM IN/OUT
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.)
5. PIP SOURCE
User can activate PIP and select the source between S-Video and Video
while the input source is Analog RGB. The PIP source changes in the order
of S-Video, Video, and off.
6. PIP POSITION
While PIP is activated, you can select one of the nine positions.
7. RETURN
Back to the last state from “ZOOM”, “BLANK”, “FREEZE” or “PIP”.

DLP Personal Projector 9
Installing or Replacing Batteries
Caution
Avoid excessive heat and humidity. There may be danger of an explo-
sion if batteries are incorrectly replaced. Replace only with the same or
equivalent type recommended by the manufacturer. Dispose of used
batteries according to the manufacturer’s instructions.
1. Use a pointy-sided stick to
release the barttery tray.
Pull the tray off.
2. Install or replace a battery.
3. Snap the battery tray back into place.

10 DLP Personal Projector
INSTALLATION
Display Size
Place the projector at the required distance from the screen according to the
desired picture size (see the table below).
RD-JT51 (SVGA) screen size chart (4:3 aspect ratio)
Distance from
screen
Diagonal measurement Distance from
screen
Diagonal measurement
Minimum
zoom
Maximum
zoom
Minimum
zoom
Maximum
zoom
feet inches feet inches feet inches meters cm meters cm meters cm
4 48 1.96 23.5 2.40 28.7 1 100 0.49 48.9 0.60 59.9
6 72 2.93 35.2 3.59 43.1 1.5 150 0.73 73.4 0.90 89.8
8 96 3.91 47.0 4.79 57.5 2 200 0.98 97.8 1.20 119.8
10 120 4.89 58.7 5.99 71.9 2.5 250 1.22 122.3 1.50 149.7
12 144 5.87 70.4 7.19 86.2 3 300 1.47 146.7 1.80 179.7
14 168 6.85 82.2 8.39 100.6 3.5 350 1.71 171.2 2.10 209.6
16 192 7.83 93.9 9.58 115.0 4 400 1.96 195.7 2.40 239.6
18 216 8.80 105.7 10.78 129.4 4.5 450 2.20 220.1 2.70 269.5
20 240 9.78 117.4 11.98 143.7 5 500 2.45 244.6 2.99 299.5
22 264 10.76 129.1 13.18 158.1 5.5 550 2.69 269.0 3.29 329.4
24 288 11.74 140.9 14.37 172.5 6 600 2.93 293.5 3.59 359.4
26 312 12.72 152.6 15.57 186.9 6.5 650 3.18 317.9 3.89 389.3
28 336 13.70 164.3 16.77 201.2 7 700 3.42 342.4 4.19 419.3
30 360 14.67 176.1 17.97 215.6 7.5 750 3.67 366.8 4.49 449.2
32 384 15.65 187.8 19.17 230.0 8 800 3.91 391.3 4.79 479.1

DLP Personal Projector 11
There is 3% ~ 5% tolerance among these numbers due to optical component limits.
* 1m = 3.28 feet, 1 feet = 0.305m, 1m = 100cm, 1 feet = 12 inches
RD-JT51 (SVGA) screen size chart (16:9 aspect ratio)
Distance from
screen
Diagonal measurement Distance from
screen
Diagonal measurement
Minimum
zoom
Maximum
zoom
Minimum
zoom
Maximum
zoom
feet inches feet inches feet inches meters cm meters cm meters cm
4 48 1.80 21.6 2.20 26.4 1 100 0.45 45.1 0.55 55.0
6 72 2.70 32.4 4.20 50.4 1.5 150 0.68 67.6 0.82 82.5
8 96 3.61 433 5.60 67.2 2 200 0.90 90.1 1.10 110.0
10 120 4.51 54.1 7.00 84.0 2.5 250 1.13 112.7 1.37 137.5
12 144 5.41 64.9 8.40 100.8 3 300 1.35 135.2 1.65 164.9
14 168 6.31 75.7 9.80 117.6 3.5 350 1.58 157.7 1.92 192.4
16 192 7.21 86.5 11.20 134.4 4 400 1.80 180.3 2.20 219.9
18 216 8.11 97.3 12.60 151.2 4.5 450 2.03 202.8 2.47 247.4
20 240 9.01 108.2 14.00 167.9 5 500 2.25 225.3 2.75 274.9
22 264 9.91 119.0 15.39 184.7 5.5 550 2.48 247.9 3.02 302.4
24 288 10.82 129.8 16.79 201.5 6 600 2.70 270.4 3.30 329.9
26 312 11.72 140.6 18.19 218.3 6.5 650 2.93 292.9 3.57 357.4
28 336 12.62 151.4 19.59 235.1 7 700 3.15 315.5 3.85 384.9
30 360 13.52 162.2 20.99 251.9 7.5 750 3.38 338.0 4.12 412.4
32 384 14.42 173.1 22.39 268.7 8 800 3.61 360.5 4.40 439.8

12 DLP Personal Projector
Connecting to Various Equipment
HDTV description
The projector is capable of displaying various High Definition TV display
modes. Some of these sources are:
Most of these sources will provide an analog composite video output, a
standard VGA output, or a YPbPr (default) format.
The projector is capable of accepting HDTV data through a YPbPr
connector. Use a HDTV cable (an optional accessory) that came with your
projector to display HDTV images.
The following standards are supported in the HDTV function:
Please refer to "Menu System" on page 16 for information on the HDTV
(YPbPr) OSD selections.
Connecting to Various Equipment
It only takes a few seconds to connect your projector to your desktop or
notebook computer, VCR, or other systems. However, a Mac adapter (an
optional accessory) is needed for connection to Macintosh computers.
Notebook/ Computer (Macintosh computer is only supported with D-Sub IN
connector.) / DVD player / S-video device / Video device or VCR
• Digital-VHS (D-VHS) player • DVD player
• Satellite Dish HDTV receiver • DTV tuners
• 480i • 480p
• 576i • 576p
• 720p • 1080i
S-Video/ Video
PC
Video
S-Video
D-SUB IN
YPbPr
DVD Player

DLP Personal Projector 13
OPERATION
Start Up
1. Plug the power cord into a wall socket.
2. Turn the Main Power Switch on.
3. Press and hold POWER to start the unit. The Power Indicator flashes
green and stays green when the power is turned on.
(When the power is turned off, there is a 90-second cooling period before the
projector can be re-started.)
4. Switch on all connected equipment.
(110V) (220V)
AUTO BLANK
SOURCE
KEYSTONE
-
KEYSTONE +
POWER
MENU
/EXIT
Projector Remote Control

14 DLP Personal Projector
Digital Keystone Correction
Keystoning refers to the
situation where the
projected image is
noticeably wider at either
the top or bottom. To
correct this, press
KEYSTONE 3/ 4(hot key)
on the remote control, and
then adjust the sliding bar
labeled Keystone, as
needed. Press 3to correct
keystoning at the top of the
image. Press 4to correct
keystoning at the bottom of
the image.
Auto Adjustment
In some cases, you may need to optimize the picture quality. To do this,
press the AUTO key on the control panel of the projector or on the remote
control. The built-in Intelligent Auto Adjustment function will re-adjust
settings to provide the best picture quality.
*This function is available only in Analog RGB mode.
AUTO BLANK
SOURCE
KEYSTONE
-
KEYSTONE +
POWER
MENU
/EXIT
Projector
Remote control
AUTO BLANK
SOURCE
KEYSTONE
-
KEYSTONE +
POWER
MENU
/EXIT
Projector Remote control

DLP Personal Projector 15
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.
Because Analog RGB and YPbPr inputs share the same terminal in the back of the projector,
there’s only one signal can be applied at one time.
Blank
Uses BLANK to hide the screen image and press BLANK again or RETURN
to bring the image back.
AUTO BLANK
SOURCE
KEYSTONE
-
KEYSTONE +
POWER
MENU
/EXIT
Projector Remote control
AUTO BLANK
SOURCE
KEYSTONE
-
KEYSTONE +
POWER
MENU
/EXIT
Projector Remote control

16 DLP Personal Projector
Menu System
1. Press MENU / EXIT to display the main menu.
2. Press 3or 4to select a sub-menu.
3. Press 3, 4, ▲or ▼to adjust / select items in the sub-menu.
4. Press MENU / EXIT to return to the previous menu.
Menu Bar
Sub-menu Display Image Source Control PIP
Analog RGB Keystone
Brightness
Contrast
Phase
H Size
Aspect Ratio
H Position
V Position
Color Temp
Information
Mirror
Source
Source Scan
Blank Time
Auto Off
Language
OSD Pos.
OSD Time
Economic Mode
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
(480p / 576p /
720p / 1080i)
Aspect Ratio
Color
Tint
Color Temp
Y/Pb/Pr
(480i / 576i)
Keystone
Brightness
Contrast
Aspect Ratio
System
Color Temp
Information
Video Keystone
Brightness
Contrast
Color
Tint
Aspect Ratio
System
Sharpness
Color Temp
Information
S-Video