Read Sharp XG-C455W (serv.man5) Service Manual online
XG-C455W/PG-C355W
5 – 2
Main PWB check
Is 6 V applied to TL1711, 13 V to TL1712 and 17V to TL1727?
NO
Go to "Power supply ballast PWB check".
YES
Is approx. 5 V applied to TL1709?
NO
Check IC1710 and peripheral circuits.
YES
Is 1.8 V applied to TL1704?
NO
Check IC1702 and peripheral circuits.
YES
Is 3.3 V applied to TL1706?
NO
Check IC1704 and peripheral circuits.
YES
Is 1.2 V applied to TL1705?
NO
Check IC1706 and peripheral circuits.
YES
Is 5 V applied to TL1708?
NO
Check IC1707 and peripheral circuits.
YES
Is 3.3 V applied to TL1703?
NO
Check IC1708 and peripheral circuits.
YES
Is 15.5 V applied to TL1707?
NO
Check IC1705 and peripheral circuits.
YES
Is5 V applied to TL1701?
NO
Check IC1701 and peripheral circuits.
YES
Is 3.3V applied to TL1723, TL1734?
NO
Check IC1703, IC1713 and peripheral circuits.
YES
Is 3.3V applied to TL2002?
NO
Check IC2002, IC2003, IC2004 and IC2005 and periph-
eral circuits.
eral circuits.
YES
Is 0 V applied to pin(2) of S2701?
NO
Check that it is set to the NORMAL side. Or remove
S2701.
S2701.
YES
Is rectangular wave of 27 MHz sent to TL2004?
NO
Check X2002 and peripheral circuits.
YES
Is 0.9V applied to pin(8) of IC2106?
NO
Check IC2106, Q2103 and peripheral circuits.
YES
Check IC2001, IC2101, IC2102, IC2103, IC2104, IC2202 and periph-
eral circuits.
eral circuits.
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