Sharp XR-1X Service Manual page 41

Checking the lamp
light-up
Does the lamp turn on
when the power is turned
NO
Is the lamp tight in the
socket?
NO
Is the discharging sound
(high voltage) heard?
NO
Has the FPC cable to
SC3502 come off or is it
loose?
NO
Is rotating sound of the
color wheel heard?
YES
Is approx. 0.7 V applied to
TL1706?
YES
Have harnesses connected
to CN1712 and CN702 of
the power supply unit come
off or are they loose?
Otherwise are they broken?
YES
Replace the lamp.
Go to "Check when the
YES
lamp turns off soon after
turning on".
YES
Securely insert the
connectors.
YES
Replace the lamp.
YES
Securely insert the
connectors.
Check IC3502 and
NO
peripheral circuits. (Refer
to the waveform chart 2.)
Check IC1701 and
NO
peripheral circuits. (Refer
to the waveform chart 1.)
NO
Fully insert the connectors
or replace the harnesses.
41
YES
Replace the color wheel.
XR-1X