Inspection Procedure - Optoma H31 Service Manual

4-5

Inspection Procedure

RESET :
Please press "Menu" button on the projector panel to enter Service Mode, then press " " or " " to
choose "Management" function. Press " " button to choose "Machine Reset" function, then press " "
to check if it works. This action will allow you to erase all end-user's settings and restore the original
factory setting.
Frequency and Phase :
Test Signal : 800*600 @ 85Hz
Test Pattern : Line Moire Pattern
- Check and see if image sharpness and focus is well performed.
- If not, readjust by following steps.
1.) Enter "Image" menu and select "Frequency" Function to adjust the total pixel number of pixel
clock in one line period.
2.) Then select "Phase" Function and use right or left arrow key to adjust the value to minimize
video flicker.
R, G, B and White Colors Contrast :
Test Signal : 800*600 @ 85Hz
Test Pattern : 64 or 16 R, G, B and White colors Intensities Pattern
- Please check and see if each colors is normal and distinguishable.
- If not, please return the unit to repair area.
Screen Uniformity and Flicker :
Test Signal : 800*600 @ 85Hz
Test Pattern : Full White Pattern
- Please check and see if it's in normal condition.
- If not, please return the unit to repair area.
Dead Pixel/Blemish Pixel :
Test Signal : 800*600 @ 85Hz
Test Pattern : Gray 30, Blue 60, White, Dark, Red, Green and Blue Pattern
- Please check and see if there are dead pixels on DMD chip.
- The total numbers and distance of dead pixels should be complaint with specification.
- Specification:
Coretronic Corporation
1. It can't have any dead pixel/
2.DMD chip can't blemish pixel.POS allows one blemish pixel.
4-5 H31