Sharp PG-F312X (serv.man5) Service Manual ▷ View 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
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.
XR-32S/XR-32X/PG-F212X/PG-F312X
5 – 7
RGB DVI-Analog and component signal check
Send component signal or RGB signal of 1080i (or 720P) from
COMPUTER/COMPONENT Terminal or DVI-I Terminal.
Select COMPUTER or DVI-Analog using keys on the main unit
or the remote control.
YES
Is image displayed normally?
YES
End
NO
Are picture signals sent to TL3201, TL3229, TL3230, TL3231,
TL3232, and TL3233?
TL3232, and TL3233?
NO
Check IC3001 and the peripheral circuits.
YES
Is 3.3V applied to TL1792?
NO
Check IC1792 and peripheral circuits.
YES
Is 3.3V applied to TL3802?
NO
Check IC3802 and peripheral circuits.
YES
Check IC3201 and peripheral circuits.
DVI digital input check
Send the DVI digital signal to the DVI-I Terminal.
Select “DVI-D Computer” using the keys on the main unit or the
remote controller.
Does an image appear properly?
YES
End
NO
Is the DVI signal supplied to R3231, R3232, R3233, R3234,
R3235, R3236, R3237 and R3238?
R3235, R3236, R3237 and R3238?
NO
Check DVI-I Terminal, L2801, L2802, L2803, L2804, D2803,
D2804 and peripheral circuits.
D2804 and peripheral circuits.
YES
Is 3.3V applied to TL1792?
NO
Check IC1792 and peripheral circuits.
YES
Is 3.3V applied to TL3802?
NO
Check IC3802 and peripheral circuits.
YES
Check IC3201 and peripheral circuits.
XR-32S/XR-32X/PG-F212X/PG-F312X
5 – 8
S-VIDEO check
Send S-Video signal (color signal) from S-Video Terminal. Select
S-Video using keys on the main unit or the remote control.
Is image displayed normally?
YES
End
NO
Is image displayed in black and white?
YES
Check S-VIDEO terminal and peripheral circuits of Q3311.
NO
Is S-VIDEO signal (Y) sent to R3305?
NO
Check S-VIDEO terminal and peripheral circuits of Q3301.
YES
Is 1.8 V applied to TL3358?
NO
Check IC3352 and peripheral circuits.
YES
Is 3.3 V applied to TL1792?
NO
Check IC1792 and peripheral circuits.
YES
Is 3.3 V applied to TL3802?
NO
Check IC3802 and peripheral circuits.
YES
Check IC3351 and peripheral circuits.
VIDEO check
Send VIDEO signal from VIDEO Terminal. Use buttons on the
main unit or the remote control to select VIDEO.
Is image displayed normally?
YES
End
NO
Is VIDEO signal sent to C3326?
NO
Check VIDEO terminal and peripheral circuits of Q3321.
YES
Is 1.8 V applied to TL3358?
NO
Check IC3352 and peripheral circuits.
YES
Is 3.3 V applied to TL1792?
NO
Check IC1792 and peripheral circuits.
YES
Is 3.3 V applied to TL3802?
NO
Check IC3802 and peripheral circuits.
YES
Check IC3351 and peripheral circuits.
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