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...

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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...

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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...

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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...

 – 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. 
•...

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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...

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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...

 – 42  –
 
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...

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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...

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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...