InFocus TD61, User Manual

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5.2 Changing the Air Filter
Clean cool air is essential to proper operation of the
TD61
When should I change the air filter?
When it gets dirty, change it.
Unfortunately, there is no absolute rule about
when to change an air filter. For some installations
the environment has clean, dust-free air, such as a
corporate lobby. The air filter may be good for a year
or more.
In other environments—airports, subway termi-
nals—the air is full of dust and dirt all the time. The
air filter might have to be changed every month.
Of course, it also depends on how many hours per
day or per week the lamp is on and the fans are run-
ning.
How to determine a changing schedule.
Remove and inspect the air filter after three
months of operation. Make a note of the air filter’s
condition. Then check it again after six months of
operation.
These two inspections will give you some idea of
how often the filter needs changing. If it doesn’t need
changing after six months, inspect again in a year. As
long as the environment doesn’t change, you can
build an appropriate schedule in this way.
If new construction occurs in the vicinity of the
InFocus displays, watch out. New construction usu-
ally means
DUST.
Changing the Filter
1. Turn off the lamp and wait 15 minutes till the
lamp cools down.The display status readout on
the front of the TD61 will tell you when the cool
down period is over, usually about 45 seconds.
Turn off the AC and unplug the AC cord.
2. Remove the left access panel by removing the two
6x32 screws at the bottom of the panel and slid-
ing the panel to the left.
Filter housing showing captive fastener on filter.
3. Remove filter from filter housing.
4. This is the TD61 filter in its holder. Remove the
foam filter from the filter holder.
5. Install new filter in the filter holder and insert the
new filter in the filter housing.
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