Sharp PG-M20XU Service Manual page 43

» PC I/F Unit-7/12
Checking of GA4 and Its Periphery
Select R, G and B individually on
the pattern menu in process mode.
Is picture outputted appropriately
in R, G and B?
No
Check pins (72), (52) and (32) of
SC8001 by oscilloscope.
These signals are MSB of B/G/R.
Do the signals selected on the
pattern menu match with those
checked by oscilloscope?
No
Does the clock signal come to pin
(78) of SC8001?
Yes
Check TL8106, TL8107, TL8108,
TL8109, TL81010 and TL81011
by oscilloscope.
Do the signals selected on the
pattern menu match with those
checked by oscilloscope?
Yes
IC8029 is defective.
Yes
Checking of GA4 and its periphery
ends.
Yes
The DLP PWB is defective.
No
Is there the clock (32.5 MHz)
signal at TL8114?
Is there the clock (32.5 MHz)
signal at TL8110?
IC8025 is defective.
No
IC8025 is defective.
43
Yes
No
No
Yes
PG-M20S
PG-M20X
IC8029 is defective.
X8005 is defective.