LG Dx420 User Manual

							
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3. Remove the two screws from 
the lamp module. 
4. Lift the module handle up. 
 
5. Pull firmly on the module  
handle to remove the lamp 
module. 
 
6. Reverse steps 1 to 5 to install 
the new lamp module.  
While installing, align the 
lamp module with the  
connector and ensure it is level 
to avoid damage. 
Note: The lamp module must 
sit securely in place and the 
lamp connector must be con-
nected properly before 
tightening the screws. 
 
 
–  35  – 
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Resetting the Lamp 
After replacing the lamp, you should reset the lamp  hour counter to zero. Refer to the following: 
1.  Press the  MENU button to open the 
OSD menu. 
2.   Press the cursor  ◄► button to move 
to the  Installation II menu. Press the 
cursor  button to move down to  
Advanced2 . 
3.  Press the cursor  ▼▲ button to move 
down to  Lamp Hour Reset . 
4.  Press the cursor  ► or Enter button.  
A message screen appears. 
5.  Press  ▼▲◄►  buttons to reset the 
lamp hour. 
6.   Press the  MENU button to get back 
to Installation II.  
 
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–  37  – 
Cleaning the Projector 
Cleaning the projector to remove dust and grime will help ensure trouble-free operation.  
Warning: 
1.  Be sure to turn off and unplug the projector at  least 30 minutes before cleaning. Failure to do so 
could result in a severe burn. 
2. Use only a dampened cloth when cleaning. Do not allow water to enter the ventilation openings 
on the projector.  
3. If a little water gets into the projector interior  while cleaning, leave unplugged in a well-ventilated 
room for several hours before using. 
4. If a lot of water gets into the projector inte rior when cleaning, have the projector serviced. 
Cleaning the Lens 
You can purchase optic lens cleaner from most camera stores . Refer to the following to clean the pro-
jector lens. 
1.   Apply a little optic lens cleaner to a clean soft cloth. (Do not apply the cleaner directly to the lens.) 
2.  Lightly wipe the lens in a circular motion. 
Caution: 
1. Do not use abrasive cleaners or solvents. 
2. To prevent discoloration  or fading, avoid getting cleaner on the projector case. 
Cleaning the Case 
Refer to the following to clean the projector case. 
1.  Wipe off dust with a clean dampened cloth. 
2.  Moisten the cloth with warm water and mild deterg ent (such as used to wash dishes), and then wipe 
the case. 
3.   Rinse all detergent from the cloth and wipe the projector again. 
Caution: 
To prevent discoloration or fading of the case, do not use abrasive  alcohol-based cleaners. 
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Using the Kensington® Lock 
If you are concerned about security, attach the proj ector to a permanent object with the Kensington 
slot and a security cable.  
 
Note: 
Contact your vendor for details on purchasing a suitable Kensi ngton security cable.  
The security lock corresponds to Kensington’s Micr oSaver Security System. If you have any com-
ment, contact: Kensington, 2853 Campus Drive, San Mateo, CA 94403, U.S.A. Tel: 800-535-4242, 
http://www.Kensington.com. 
 
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 – 39  –
 
TROUBLESHOOTING 
Common problems and solutions 
These guidelines provide tips to deal with problem s you may encounter while using the projector. If 
the problem remains unsolved, cont act your dealer for assistance. 
Often after time spent troubleshooting, the problem is  traced to something as simple as a loose con-
nection. Check the following before proceedi ng to the problem-specific solutions. 
•  Use some other electrical device to confirm that the electrical outlet is working. 
•  Ensure the projector is turned on. 
•  Ensure all connections are securely attached.  
•  Ensure the attached device is turned on. 
•  Ensure a connected PC is not in suspending mode. 
•  Ensure a connected notebook computer is configured for an external display. 
(This is usually done by pressing an Fn-key combination on the notebook.) 
Tips for Troubleshooting 
In each problem-specific section, tr y the steps in the order suggested. This may help you to solve the 
problem more quickly. 
Try to pin point the problem and thus  avoid replacing non-defective parts.  
For example, if you replace batteries and the problem remains, put the original batteries back and go 
to the next step.  
Keep a record of the steps you take when troubles hooting: The information may be useful when call-
ing for technical support or for passing on to service personnel. 
 
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– 40 –  
LED Error Messages 
ERROR CODE MESSAGES POWER LED 
BLINK 
OVER TEMP  
LED 
READY LED 
BLINK 
Over temperature 0 ON 0 
Thermal break status error 4 0 0 
Lamp  error 5 0 0 
Fan1 error 6 0 1 
Fan2 error 6 0 2 
Fan3 error 6 0 3 
Lamp  door open 7 0 0 
DMD  error 8 0 0 
Color wheel error 9 0 0 
In the event of an error, please  disconnect the AC power cord and wait for one (1) minute before re-
starting the projector. If the Powe r or Ready LEDs are still blinking or the Over Temp LED is lit, 
contact your service center. 
Image Problems 
Problem: No image appears on the screen 
1.  Verify the settings on your notebook or desktop PC. 
2. Turn off all equipment and power up again in the correct order. 
Problem: The image is blurred  
1. Adjust the  Focus on the projector. 
2. Press the  Auto button on the remote control or projector. 
3. Ensure the projector-to-screen distance is within the 10-meter (33-feet) specified range. 
4. Check that the projector lens is clean. 
Problem: The image is wider at the top or bottom (trapezoid effect)  
1. Position the projector so it is as perpendicular to the screen as possible.  
2. Use the Keystone button on the remote control or projector to correct the problem. 
Problem: The image is reversed  
Check the  Projection setting on the  Installation I menu of the OSD. 
Problem: The image is streaked  
1. Set the  Frequency  and Tracking settings on the  Computer menu of the OSD to the de-
fault settings. 
2.  To ensure the problem is not caused by a connected PC’s video card, connect to another 
computer.  
Problem: The image is flat with no contrast  
Adjust the  Contrast setting on the Image  menu of the OSD. 
Problem: The color of the projected image does not match the source imag\
e. 
Adjust the Color Temperature  and Gamma settings on the  Image menu of the OSD. 
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–  41  – 
Lamp Problems 
Problem: There is no light from the projector  
1.  Check that the power cable is securely connected. 
2. Ensure the power source is good by te sting with another electrical device. 
3. Restart the projector in the correct order and check that the Power LED is green. 
4. If you have replaced the lamp recently,  try resetting the lamp connections.  
5. Replace the lamp module. 
6. Put the old lamp back in the projector and have the projector serviced. 
Problem: The lamp goes off 
1. Power surges can cause the lamp to turn  off. Re-plug power cord. When the Ready LED 
is on, press the power button. 
2.  Replace the lamp module. 
3. Put the old lamp back in the projector and have the projector serviced. 
Remote Control Problems 
Problem: The projector does not respond to the remote control  
1. Direct the remote control towards remote sensor on the projector.  
2. Ensure the path between remote and sensor is not obstructed. 
3. Turn off any fluorescent lights in the room. 
4. Check the battery polarity. 
5. Replace the batteries. 
6. Turn off other Infrared-enabled devices in the vicinity. 
7. Have the remote control serviced. 
Audio Problems 
Problem: There is no sound 
1. Adjust the volume on the remote control.  
2. Adjust the volume of the audio source. 
3. Check the audio cable connection. 
4. Test the source audio output with other speakers. 
5. Have the projector serviced. 
Problem: The sound is distorted  
1. Check the audio cable connection. 
2. Test the source audio output with other speakers. 
3. Have the projector serviced. 
Having the Projector Serviced 
If you are unable to solve the problem, you should have the projector serviced. Pack the projector in 
the original carton. Include a description of the problem and a checklist of  the steps you took when 
trying to fix the problem: The information may be usef ul to service personnel. For servicing, return the 
projector to the place you purchased it. 
 
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SPECIFICATIONS 
Specifications 
Model  DS420 DX420 
Display type TI DMD 0.55-inch SVGA  TI DMD 0.55-inch XGA 
Resolution  SVGA 800x600 Native  XGA 1024x768 Native 
Projection distance  1.5 meters ~ 10 meters  1 meter ~ 10 meters 
Projection screen size  36 to 246 inches  23 to 255 inches 
Projection lens  Manual focus  Manual Focus/Manual Zoom 
Zoom ratio  N/A 1.1 
Vertical keystone  
correction  +/- 15 degrees 
Projection methods 
Front, Rear, Desktop/Ceiling (Rear, Front) 
Data compatibility IBM PC or compatibles (VGA, SVGA, XGA, SXGA, UXGA), Mac 
SDTV/EDTV/ HDTV  480i, 576i, 480p, 576p, 720p, 1080i 
Video compatibility NTSC/NTSC 4.43, PAL (B
/G/H/I/M/N/60), SECAM 
H-Sync  15, 30 – 80 kHz 
V-Sync  43 – 87 Hz 
Safety certification FCC-B, UL, cUL, TUV, CB,
 CE, PCT, SASO and CCC 
Operation temperature  5° ~ 35°C 
Dimensions 280 mm (W) x 88 mm (H) x 205 mm (D) 
AC Input AC Universal 100 ~ 240, Typical @ 110VAC (100~240)/+-10% 
Power consumption  Typical 230W (Normal mode); Typical 200W (Eco mode) 
Stand By  
						

							
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Projection Distance vs. Projection Size 
 
DS420 Projection Distance and Size Table 
DS-420 TR 2 FIX ZOOM 
Distance (m) 1.22  3.25  4.06  10.00  
Diagonal (inches) 30 80 100 246 
Keystone (degree) 13.50  13.50  13.50  13.50  
Image Height (mm) 457.2 1219.2 1524 3749.04 
Image Width (mm) 609.6 1625.6 2032 4998.72 
A (mm) 64.01  170.69  213.36  524.87  
 
DX420 Projection Distance and Size Table 
DX-420 TELE WIDE 
Distance (m) 1.32 3.51 4. 39 8.78 1.57 3.14 3.92 10.00 
Diagonal (inches) 30 80 100 200 40 80 100 255 
Keystone (degree) 12.53 12.53 12.53 12.53 13.97 13.97 13.97 13.97 
Image Height (mm) 457.2 1219.2 1524 3048 609.6 1219.2 1524 3886.2 
Image Width (mm) 609.6 1625. 6 2032 4064 812.8 1625.6 2032 5181.6 
A (mm) 64.01 170.69 213.36426.72 85.34 170.69 213.36 544.07 
 
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– 44 –  
DS420 Timing Mode Table 
The projector can display several resolutions. The  following table outlines the resolutions that can be 
displayed by the projector. 
SIGNAL RESOLUTION H-SYNC  
(KHZ) 
V-SYNC 
(HZ) 
COMPOSITE 
/ S-VIDEOCOMPONENTRGB
NTSC — 15.734 60.0 O — — 
PAL/SECAM — 15.625 50.0 O — — 
640 x 350* 37.9 85.0 — — O 
640 x 400* 37.9 85.0 — — O 
720 x 400* 37.9 85.0 — — O 
640 x 480 31.5 60.0 — — O 
640 x 480 37.9 72.0 — — O 
640 x 480 37.5 75.0 — — O 
640 x 480 43.3 85.0 — — O 
800 x 600 35.2 56.0 — — O 
800 x 600 37.9 60.0 — — O 
800 x 600 48.1 72.0 — — O 
800 x 600 46.9 75.0 — — O 
800 x 600 53.7 85.0 — — O 
1024 x 768 48.4 60.0 — — O 
1024 x 768 56.5 70.0 — — O 
1024 x 768 60.0 75.0 — — O 
1024 x 768 68.7 85.0 — — O 
1440 x 900 55.6 60.0 — — O 
1280 x 1024 63.98 60.0 — — O 
1280 x 1024 79.98 75.0 — — O 
1400 x 1050 65.3 60.0 — — O 
640 x 480 35.0 66.68 — — O 
832 x 624 49.725 74.55 — — O 
1024 x 768 60.24 75.0 — — O 
VESA 
1152 x 870 68.68 75.06 — — O 
480i 15.734 60 — O — SDTV 576i 15.625 50 — O — 
480p 31.469 60 — O — EDTV 576p 31.25 50 — O — 
 
 
 
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