Sharp XG-MB50X Service Manual page 31

Main PWB check
s 6 V applied to TL1702
and 13 V to TL1703?
ES
s approx. 6 V applied to
TL1742?
ES
s 1.5 V applied to
TL1741?
ES
s 3.3 V applied to
TL1762?
ES
s 2.5 V applied to
TL1763?
ES
s 5 V applied to TL1791?
ES
s 3.3 V applied to
TL1792?
ES
s 12 V applied to
TL1761?
ES
NO
Go to "Power supply
ballast PWB check".
NO
Check C1742 and
peripheral circuits.
NO
Check C1741 and
peripheral circuits.
NO
Check C1763 and
peripheral circuits.
NO
Check C1762 and
peripheral circuits.
NO
Check C1791 and
peripheral circuits.
NO
Check C1792 and
peripheral circuits.
NO
Check C1761 and
peripheral circuits.
s 3.3 V applied to pin(1)
of C1743?
s 3.18 V applied to pin(1)
of C2001?
s 3.3 V applied to pin(3)
of S2001?
s rectangular wave of 50
MHz sent to X2251 pin(3)?
Check C2002, C2262,
C2263 and peripheral
circuits.
31
XG-MB50X
XR-11XC
XR-10X/S
XR-20X/S
NO
ES
Check C1743 and
peripheral circuits.
NO
ES
Check C2001 and
peripheral circuits.
NO
ES
Check that it is set to the N
side. Or remove S2001.
NO
ES
Check X2251 and
peripheral circuits.