Maintenance; ❶ Cleaning The Filters - NEC PA622U User Manual

7. Maintenance

This section describes the simple maintenance procedures you should follow to clean the filters, the lens, the cabinet,
and to replace the lamp and the filters.
❶ Cleaning the Filters
The air-filter sponge keeps dust and dirt from getting inside the projector and should be frequently cleaned. If the filter
is dirty or clogged, your projector may overheat.
WARNING
• Please do not use a spray containing flammable gas to remove dust attached to the filters, etc. Doing so may
result in fires.
NOTE: The message for filter cleaning will be displayed for one minute after the projector is turned on or off. When the message is
displayed, clean the filters. The time to clean the filters is set to [OFF] at time of shipment. (→ page 110)
To cancel the message, press any button on the projector cabinet or the remote control.
The two-layer filter on the projector improves cooling and dust-proof capabilities compared with the conventional
models.
The outsides (the intake vent side) of the first and second layer filters remove dust.
To clean the filter, detach the filter unit and the filter cover.
CAUTION
• Before cleaning the filters, turn off the projector, disconnect the power cord and then allow the cabinet to cool.
Failure to do so can result in electric shock or burn injuries.
1. Press down on the buttons on the left and right and then
pull the filter cover towards you to open it.
The cover will open about 90 degrees before it stops.
When mounting the projector to a ceiling
The filter cover will open about 90 degrees before it comes to a
stop at the stopper position. Remove your hands as the stopper
will be detached if it is opened further. The filter cover will stop
at a position of about 90 degrees.
However, the filter cover may close if the projector vibrates.
Filter cover
174
Button