Sharp XG-PH50X Serviceanleitung Seite 62

XG-PH50X
XG-PH50X-NL
Checking the
periphery of GA5
Select R, G and B separately
in the pattern menu of the
process mode.
Are R, G and B of a picture
sent properly?
NO
Measure pins 31, 21 and 11of
SC8004 with an oscilloscope.
These signals are MSB of
B/G/R.
Do the contents selected in
the pattern menu correspond
with the measured signals?
NO
Is the clock applied to the pin
58 of SC8004?
YES
Measure TL8047, 8048, and
8049 with an oscilloscope.
Do the contents selected in
the pattern menu correspond
with the measured signals?
YES
IC8032 is defective.
YES
End of checking the
periphery of GA5.
YES
The formatter PWB is
defective.
NO
Is the clock (65 MHz)
applied to FL8009?
Is the clock (65 MHz)
applied to FL8006?
IC8025 is defective.
NO
IC8025 is defective.
62
YES
NO
IC8032 is defective.
NO
YES
X8004 is defective.