BenQ 9H.Y1277.000, Product Service Manual

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3. DMD Panel Alignment
Equipment:
-
Pattern Generator
Procedure:
1.
Connect power, Video signal into projector.
2. Light on projector
3. Change pattern generator to full white pattern.
4. Watch the image if any pixel lost
5. Change pattern to full black.
6. Watch the image if any pixel lost
7. Change pattern from full black to full white.
8. Watch the image if any pixel can not return
9. Change pattern from full black to full white.
10. Watch the image if any pixel can not return
11. If above 8 step has some pixel lost or can not return, it’s DMD chip has pixel defect
12. Change to the Slid Line pattern
13. Watch the image if any pixel lost
14. If above step has some pixel lost, it’s conductive socket has defect or assembly loosed.