PG-M20S (serv.man8). Removing of major parts - Sharp Projector Service Manual (repair manual). Page 4

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16
PG-M20S
PG-M20X
6. Removing the formatter PWB
6-1. Disconnect the connector.
6-2. Remove the two lock screws from the heat sink.
6-3. Remove the four lock screws from the backer plate assembly, and detach the formatter PWB.
Note: The DMD (Digital Micromirror Device) unit is easily affected by static electricity. In handling this unit, be sure
to wear a wristband or take other anti-static measure.
6-2
6-1
6-3
Formatter PWB unit
Backer plate assembly
DMD (Digital Micromirror 
Device) unit
Heat sink
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.
Formatter PWB unit
Backer plate assembly
DMD (Digital Micromirror 
Device) chip
+Outer Frame
+C-spring
Heat sink
Prism surface
Mirror adjusting plate
Fig.1
Shade
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