Sharp XR-1X - Page 37

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