Read Sharp PG-F312X (serv.man5) Service Manual online
XR-32S/XR-32X/PG-F212X/PG-F312X
5 – 6
Check when the lamp turns off soon after turning on
Have connectors P1703, P1721,
P1722 and P1723 come off or are
they loose?
YES
Securely insert the connectors.
NO
Is each cooling fan rotating?
NO
Check the cooling fan.
YES
The lamp light-up. After about 30 sec-
onds, the TEMP LED flash red and
the lamp turn off.
onds, the TEMP LED flash red and
the lamp turn off.
YES
Check the TEMP1 and TEMP0
signal line.
signal line.
NO
Is approx. 3 V applied to TL1721?
NO
Check peripheral circuits of Q1721.
YES
Is 12 V applied to TL1761?
NO
Check IC1761, IC3802 and peripheral
circuits.
circuits.
Go to “DMD system check”.
YES
Is 2.5 V applied to TL3801?
NO
Is 3.3 V applied to TL3802?
YES
Check L3802 and peripheral
circuits.
circuits.
YES
NO
Check L3801 and peripheral
circuits.
circuits.
Is 5 V applied to TL3814?
NO
Check L3806 and peripheral circuits.
YES
Is 5 V applied to TL1712?
NO
Is 5 V applied to TL1712 with P1703
removed?
removed?
NO
Check connection of FB1710 and
Q1707 and Q1708.
Q1707 and Q1708.
YES
YES
Is the signal of 180 Hz sent to
TL1716? (When vertical frequency of
the input signal is 60 Hz)
TL1716? (When vertical frequency of
the input signal is 60 Hz)
NO
Check PHOTO SENSOR PWB.
YES
Is the signal of 180 Hz sent to
TL1706? (When vertical frequency of
the input signal is 60 Hz)
TL1706? (When vertical frequency of
the input signal is 60 Hz)
NO
Check IC1701 and peripheral circuits.
YES
Check the power supply ballast PWB.
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