Sharp PG-A10S Service Manual page 34

PG-A10S
PG-A10S-SL
AN-A10T
Checking the lamp
light-up
Is the lamp socket
disconnected?
NO
Are DC350-400V voltages
applied between the pins
of CN703?
YES
Are the CN751 and
CN752 harnesses tight in
position in the power unit
and ballast unit as well?
Are these harnesses free
of damage?
YES
Are there 3V (High level)
and 1V applied at pins (1)
and (13), respectively, of
CN751 in the power unit?
YES
Replace the ballast unit.
Checking the RGB
sync
Are theire signal inputted
into pins (2)
of IC5002, IC5015?
YES
Are theire signal inputted
into pins (30),
(31) of IC6004?
YES
Reconnect the lamp
socket tightly.
NO
Go to "Checking the
power unit".
NO
Reconnect the CN751
and CN752 harnesses
tight enough. Or replace
these harnesses.
NO
Go to "Checking the
microcomputer
peripherals".
NO
Check RGB terminal and
its peripheral circuits
NO
Check IC6001 and its
peripheral cuicuits.
34