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Checking the lamp light-up
Does the lamp turn on
YES
when the power is turned
on?
NO
Is the lamp tight in the
YES
socket?
NO
Has the FPC cable to
YES
SC3581 come off or is it
loose?
NO
Is rotating sound of the
NO
color wheel heard?
YES
Is approx. 0.7 V applied to
NO
TL1706?
YES
Has the harness connected
YES
to P702 on the power sup-
ply unit come off, or is it
loose? Otherwise, is it bro-
ken?
NO
Dose the lamp turn on after
YES
the replacement?
NO
Is 340 VDC applied to both
NO
ends of C914?
YES
Is D911 or D912 shortcir-
YES
cuited?
NO
Is D914or D910 shortcir-
YES
cuited?
Go to "Check when the
lamp turns off soon after
turning on".
Securely insert the con-
nectors.
Securely insert the con-
nectors.
Check IC3581 and periph-
YES
eral circuits. (Refer to the
waveform chart
.)
2
Check IC1701 and periph-
eral circuits. (Refer to the
waveform chart
.)
1
Fully insert the connec-
tors or replace the har-
nesses.
Replace the lamp.
Go to "Power supply PWB
check".
Replace both D911 and
D912.
Replace D914 or D910,
whichever is short-cir-
cuited.
8 – 7
Replace the color wheel.
XG-MB67X
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