Read Sharp PG-F312X (serv.man5) Service Manual online
XR-32S/XR-32X/PG-F212X/PG-F312X
5 – 5
Checking the lamp light-up
Does the lamp turn on when the
power is turned on?
YES
Go to “Check when the lamp turns off
soon after turning on”.
soon after turning on”.
NO
Is the lamp tight in the socket?
YES
Securely insert the connectors.
NO
Has the FPC cable to SC3801 come
off or is it loose?
off or is it loose?
YES
Securely insert the connectors.
NO
Is rotating sound of the color wheel
heard?
heard?
NO
Check IC3802 and peripheral
circuits.
circuits.
(Refer to the waveform chart
.)
YES
Replace the color wheel.
YES
Is approx. 0.7 V applied to TL1706?
NO
Check IC1701 and peripheral
circuits.
circuits.
(Refer to the waveform chart
.)
YES
Has the harness connected to P702
on the power supply unit come off, or
is it loose?
Otherwise, is it broken?
on the power supply unit come off, or
is it loose?
Otherwise, is it broken?
YES
Fully insert the connectors or replace
the harnesses.
the harnesses.
NO
Dose the lamp turn on after the
replacement?
replacement?
YES
Replace the lamp.
NO
Is 340 V DC applied to both ends of
C917?
C917?
NO
Go to “Power supply PWB check”.
YES
Is D907 short-circuited?
YES
Replace D907.
NO
Is D906 or D910 short-circuited?
YES
Replace D906 or D910, whichever is
short-circuited.
short-circuited.
2
1
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