Mitsubishi Electric XD221U Service Manual page 49

DIAGNOSIS INFORMATION
This chapter provides technicians with electronic background how to maintain the product.
Moreover, you can get the appropriate operation to solve some complicated problems of
component repairing and professional problems.
Troubleshooting
Warning
• Do not directly look into the lens to avoid eyesight damages.
• The projector is equipped with ventilation holes (intake) and ventilation holes (exhaust). Do not block or place anything near
these slots, or internal heat build-up may occur, causing picture degradation or damage to the projector.
Confirm Software and hardware
(1) Confirm FW version and lamp using hours
(2) Confirm LED indicator
Projector Status
Power LED
Color
Standby Red
Green
Lamp Standby
Power On Green
-
Lamp failure
Green
Fan failure
-
Lamp life warning
Power off -
Over temperature Green
(3) Confirm cable connection well.
(4) Confirm Main board version
LED
Status LED
Status Color
Solid -
Solid Green Blinking
Solid Green
- Green Blinking
Blinking Green
- Amber
- Green
Flashing
Solid Red
Status
- The projector is powered and ready.
About  minute.
Solid The projector is powered.
To replace lamp and reset the lamp hour.
Solid To check if the fan is clogged with dust or dirt and lean it.
The lamp has reached its end of life and must be changed
Solid
soon. The lamp will continue to operate until it fails.
The projector is shutting down. The fans motor is cooling the
lamp for shutdown. Do not unplug the power cord or turn the
power switch off before the lamp LED turns off. The fan mo-
tor will turn off when the lamp has cooled.
The projector believes the temperature is too high. The lamp
Solid
will turn off.
-  -
Meaning