-44-
Does a indicator flash
or light?
The primary power supply circuit
does not operate properly.
Check Varistor (VA601).
Check Power Board.
Is fuse (F601) broken?
Check Thermal switch
(SW902) ......short in normal
SW902 opens when the surround-
ing temperature of the switch
exceeds 90°C.
WARNING (red) and
POWER (red) indica-
tors are flashing?
The symptom indicates that the projector detected an
abnormal temperature risen inside the projector.
Check the air filters and remove the object near the
intake and exhaust fan openings, and wait until the
POWER indicator stops flashing, and then try to turn
on the projector.
-
The internal temperature is monitored by sensor ICs,
IC8841 on Sensor Board, IC8801 and IC8811 on Main
Board.
Yes
No
POWER (red) indicator
is flashing?
The symptom indicates that the projector detected an
abnormality in the lamp cover or the slide motion
door.
Check the lamp cover and the slide motion door.
Lamp Cover Switch (SW8803 on Lamp SW board)
Make sure that the lamp cover is mounted correctly. If
not or the lamp cover removed, the lamp does not light
on for the safety. Check the lamp cover and lamp cover
switch.
Door Switch (SW8801 on Door SW board)
Make sure that the door is open. If not, the projector
does not work.
Yes
No
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POWER
red/green
Indicators
WARNING
red
No
Yes Yes
No
● No Power
This projector provides a function which can be specified a defective area simply by indicating the LEDs on the con-
trol panel. Connect the AC cord and press the Power button once and then check the LED indication.
• • • lights green. • • • lights red.
• • • off
• • • flashes green.
• • • flashes red.
Troubleshooting
■ Troubleshooting
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