Sharp Notevision XR-1X, Service Manual

Page: 38 / 142

38
XR-1X
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 approx. 7 V applied to
TL9303?
YES
YES
Is 3.27 V applied to IC2203
pin(1) and 1.8 V to TL2201?
YES
YES
Is 400 MHz on IC2202 pin
(20)?
YES
Is approx. 26 V applied to
TL9301?
YES
YES
Is approx. -26 V applied to
TL9302?
NO
NO
NO
NO
NO
NO
Check IC2203, IC2205,
and their peripheral
circuits.
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.
Check IC2202 and
peripheral circuits.
Check IC9301 and
peripheral circuits.
DMD system check