LG RD-JT30 Service Manual page 151

Optical Engine trouble shooting guide
Debug Item Trouble Shooting Guide
1. Brightness 1. Chk EE setting / Follow up EE alignment procedure
2. Chk fold mirror position / re-align fold mirror to be closer to design
3. Chk Rod lens at datum surface / put rod lens at right datum surface
4. Chk Green color / If too green and over spec., change color drum
5. Change lamp
2. Uniformity 1. Chk fold mirror position / re-align fold mirror to be closer to design position
2. Chk lamp / Re-assembly lamp
3. On/Off Contrast 1. Chk projection lens clean / To clean projection lens
2. Chk TIR and DMD clean / To clean TIR and DMD
4. ANSI Contrast 1. Chk projection lens clean / To clean projection lens
2. Change projection lens
5. Color Chk Front glass
Chk color drum 50% point for every segment
6. Color Uniformity Chk DMD
Chk rod output surface
7. Focus 1. Chk TIR at datum surface / Change HSG and TIR
2. Chk focus by Focus formula Y=-0.00037X+0.002 (X at the front of Screen
8. Dust 1. Clean rod output surface
2. Clean DMD surface
position.
is – and at rear of Screen is +)/ assembly slim metal sheet on projection lens
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