Sharp XV-Z3100U Service Manual page 32

XV-Z3100U/XV-Z3100/XV-Z3300/DT-510
DMD system check
Check P6001 for breakage
and solder crack and
peripheral resistance for
solder crack.
Check SC9001 for
breakage and solder crack.
Is there any vertical stripe
(block noise) on the
screen?
Is approx. 7 V applied to
TL9303?
Is approx. 26 V applied to
TL9301?
Is approx. -26 V applied to
TL9302?
YES
NO
NO
YES
NO
Check IC9301 and
peripheral circuits.
YES
NO
YES
5 – 3
The main PWB and DMD
PWB are in poor contact.
Check the contact surface
for dirt and smear.
Check the DMD connector
for breakage.
Reassemble the DMD,
optical mechanism, and
DMD PWB.