NEC MT 1020G /820G - Manual (Page 29)

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Cleaning Or Replacing The Filter
The air-filter sponge keeps the inside of the MultiSync MT1020G/
820G LCD Projector free from dust or dirt and should be cleaned
after every 100 hours of operation (more often in dusty conditions).
If the filter is dirty or clogged, your projector may overheat.
NOTE: Clean your filter after every 100 hours of operation.
CAUTION
• Turn off the LCD projector and wait for the fan to stop. Turn
off the main power and unplug the projector before replacing
the filter.
• Only clean the outside of the filter cover with a vacuum
cleaner.
• Do not attempt to operate the projector without a filter.
• Your LCD projector will not operate unless the filter is in-
stalled correctly.
• Do not put the LCD projector on end except to replace the
filter.
To clean the air-filter:
1. Turn over the projector. Put the LCD projector on end so that the
bottom is visible.
2. Vacuum the filter through the filter cover.
3. Place the projector back in a horizontal position.
To replace the air-filter:
1. Remove the filter panel by pushing up on the catch of the cover
with a flat-head phillips until you feel it detach.
2. Remove the filter and replace it.
3. Reinstall the filter panel.
NOTE: Do not detach the sponge from the filter cover. Do not wash the
filter with soap and water. Soap and water will damage the filter
membrane.
Before replacing the air-filter, remove dust and dirt from the
projector cabinet. Keep them out during filter replacement.
Remote Control Battery Installation
1. Press firmly and slide the battery cover off.
2. Remove all two old batteries and install new ones (AA). Ensure
that you have the batteries' polarity (+/–) aligned correctly.
3. Slip the cover back over the batteries until it snaps into place.