XG-MB67X
8 – 8
Check when the lamp turns
off soon after turning on
Have connectors P1703,
P1721, P1722, P1723 and
P1724 come off or are they
loose?
YES Securely insert the connec-
tors.
NO
Is each cooling fan rotating? NO Check the cooling fan.
YES
Is approx. 3 V applied to
TL1721?
NO Check peripheral circuits of
Q1721.
YES
Is 12 V applied to TL1761? NO Check IC1761, IC3581 and
peripheral circuits.
Go to "DMD system check".
YES
Is 2.5 V applied to TL1763? NO Is 3.3 V applied to TL1762? YES Check IC1762 and peripheral cir-
cuits.
YES
NO
Check IC1763 and periph-
eral circuits.
Is 5 V applied to TL1791? NO Check IC1791 and periph-
eral circuits.
YES
Is 5 V applied to TL1712? NO Is 5 V applied to TL1712
with P1703 removed?
NO Check connection of FB1710.
YES YES
Is the signal of 180 Hz sent to
TL1716? (When vertical fre-
quency of the input signal is
60 Hz)
NO Check PHOTO SENSOR
PWB.
YES
Is the signal of 180 Hz sent to
TL1706? (When vertical fre-
quency of the input signal is
60 Hz)
NO Check IC1701 and periph-
eral circuits.
YES
Check the power PWB.
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