NEC M350X User Manual page 117

Clean both outside and inside.
Filter unit: Attach two hard honeycomb filters (large and small)
to the filter unit.
Filter cover: Attach two soft accordion filters (large and small)
to the filter cover.
The accordion filter has slits on it. Align these slits with the
protrusions of the filter cover.
Align the filter unit with the filter cover and push the six protru-
sions into place.
Insert two catches of the tip of the filter unit into the groove of
the cabinet, and push the button to close the filter unit.
W IR
E L
E S
S
Plug the power cord into the wall outlet, and then turn on the
projector.
From the menu, select [RESET] [CLEAR FILTER HOURS].
( page 91)
The interval time to clean the filters is set to [OFF] at time of
Groove Button
shipment. When using the projector as it is, you do not clear
the filter usage