Sharp XR-1X Serviceanleitung Seite 37

Main PWB check
Is 6 V applied to TL1703
and 13 V to TL1704?
Is approx. 6 V applied to
TL1732?
Is 1.5 V applied to
TL1731?
Is 3.3 V applied to
TL1734?
Is 2.5 V applied to
TL1733?
Is 5 V applied to TL1772?
Is 3.3 V applied to
TL1773?
Is 12 V applied to
TL1771?
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NO
Go to "Checking the power
unit".
YES
NO
Check IC1732 and
peripheral circuits.
YES
NO
Check IC1731 and
peripheral circuits.
YES
NO
Check IC1734 and
peripheral circuits.
YES
NO
Check IC1733 and
peripheral circuits.
YES
NO
Check IC1772 and
peripheral circuits.
YES
NO
Check IC1773 and
peripheral circuits.
YES
NO
Check IC1771 and
peripheral circuits.
YES
manuals search engine
Is 3.3 V applied to pin(1)
of IC1702?
Is 3.18 V applied to pin(1)
of IC2001?
Is 3.3 V applied to pin(3)
of S2001?
Is rectangular wave of 50
MHz sent to X2201 pin(3)?
Check IC2002, IC2204,
IC2206 and peripheral
circuits.
37
XR-1X
NO
YES
Check IC1702 and
peripheral circuits.
NO
YES
Check IC2001 and
peripheral circuits.
NO
YES
Check that it is set to the N
side. Or remove S2001.
NO
YES
Check X2201 and
peripheral circuits.