Sharp XV-Z12000 Anleitung Seite 53

IC8338 peripheral check
Is a clock signal (20.25 MHz)
present at TL8002?
YES
Is a clock signal present at
TL8004?
YES
Supply a RAMP signal to INPUT4,
and observe pins (31 - 40) of
IC8338 using an oscilloscope.
Is a pulse present at pins (31 - 40)
of IC8338?
YES
Supply a color bar signal to
INPUT4, and observe pins
(41 - 50) of IC8338.
Is a pulse present at pins
(41 - 50) of IC8338?
YES
IC8025 or after is defective.
NO
Check X8006, or IC8338 is
defective.
NO
IC8338 is defective.
NO
IC8338 is defective.
NO
IC8338 is defective.
53
XV-Z12000