Sharp XV-Z90E Service Manual page 13

Precautions in replacing the DMD chip
Note: Be careful not to allow dust and fingerprint
on the cover glass of DMD chip and prism
surface of optical engine.
1. When you fix 4screws of backer plate assembly,
press backer plate to formatter PWB and fix by
cross multiply step by step.
2. If something shade appears on the projection
screen like Fig1, release 2 screws on mirror
adjusting plate and move that plate to adjust
illumination area of DMD chip.
Fig.1
* Precautions in setting up the DMD (Digital Micromirror Device) unit
Before connecting the formatter PWB to the optical engine, take the following steps. Look at the voltage rank marking
that is on the DMD itself. Referring to this marking, set the DIP switches on the formatter PWB. And connect this PWB
to the optical engine. Wrong settings will adversely affect the system performance.
Voltage ranking system with the switch switches on formatter PWB
B
Mirror adjusting plate
Shade
C D E
Prism surface
DMD
(Digital Micromirror
Device) chip
+Outer Frame
+ C-Spring
Voltage rank marking
This sample is "C".
13
XV-Z90E
XV-Z91E
Formatter PWB
Backer Plate