Sharp PG-C20XU Service Manual page 32

PG-C20XU
PG-C20XE
AN-Z7T
Checking the power unit
Are the connectors CN751,
P1707 and P3701 inserted
completely?
Is the lamp cover closed
completely?
Is the bimetal switch off?
Is AC voltage (100-240V)
applied between pins (1)
and (3) of CN703?
Disconnect the CN751
connector (EA). Is there
13V output at pins (7), (8)
and (9)?
Check the output PWB for
short-circuit. Check also
the UNT3701 on the
connection terminal PWB
and its peripheral circuits.
NO
Insert the connectors
YES
CN751, P1707 and
P3701 tightly?
NO
Close the lamp cover
YES
tightly.
NO
YES
Replace the bimetal
NO
YES
NO
Check Q706, Q708 and
Q710 for damage.
YES
Replace as required.
32
Replace F701.