Sharp XR-1X Serviceanleitung Seite 38

XR-1X
DMD system check
Check SC2502 for
breakage and solder crack
and peripheral resistance
for solder crack.
Check SC9102 for
breakage and solder crack.
Is there any vertical stripe
(block noise) on the
NO
Is the screen all black?
Is 3.27 V applied to IC2203
pin(1) and 1.8 V to TL2201?
Is 400 MHz on IC2202 pin
(20)?
Is approx. 7 V applied to
TL9303?
Is approx. 26 V applied to
TL9301?
Is approx. -26 V applied to
TL9302?
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YES
NO
YES
Check IC2203, IC2205,
NO
and their peripheral
circuits.
YES
NO
Check IC2202 and
peripheral circuits.
YES
NO
YES
NO
Check IC9301 and
peripheral circuits.
YES
NO
YES
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38
Poor contact between
Formatter PWB and DMD
unit.
Check the contact faces for
dust and dirt.
Check the C spring for
breakage.
Reinstall DMD, optical
mechanism, and Formatter
PWB.