Sharp PG-B10S Anleitung Seite 39

Checking the
microprocessor circuits
Is there about DC3.3V
applied between pins (3)
and (5) of IC1703?
YES
Is there about DC2.5V
applied between pins (5)
and (8) of IC1704?
YES
Is there about DC2.5V
applied between pins (3)
and (4) of IC8009?
YES
Is there 133-MHz clock
output at pin (6) of IC8010?
Is there 75-MHz clock
output at pin (6) of IC8011?
YES
Is there about DC3V
applied at pin (21) of
IC2002? Check the D0 thru
D7 signals with an
oscilloscope: Are there
pulse signals?
YES
Check IC2002 and its
peripheral circuits.
Check IC8202, IC8203,
IC2601 and their
peripheral circuits.
NO
Check IC1703 and its
peripheral circuits, or IC1702
and its peripheral circuits.
NO
Check IC1704 and its
peripheral circuits.
NO
Is the lamp cover or filter
cover tightly closed? Or is
the P2006(LF) jack tight
in position?
YES
Close the lamp cover or
filter cover tightly. Or
insert the P2006(LF) jack.
NO
Check IC8010, IC8011 and
their peripheral circuits.
NO
Check the fan for unusual
run. Or check IC8003 and
its peripheral circuits.
39
NO
Check IC8009 and its
peripheral circuits.
PG-B10S