Hughes JVC 220, Service Manual

Page: 98 / 140

Chapter 4---Maintenance (Removal/Replacement)
The power interlock switches for both covers are attached
to each cover hinge.
5. When the Latch Levers are inserted into the holding
slots, lift the cover off. Be careful not to brush against
any of the internal components of the projector when
removing the cover. If any undue resistance is felt, stop
to locate the source before proceeding.
6. Replace the covers in reverse order from above. When
replacing either cover, make sure the slot in the cover
fits over the bottom of the projector case or the cover
will not close correctly.
4.3 Air Filters
Air filters should be cleaned whenever necessary. In extremely
dusty or dirty conditions, the filters should be cleaned more
frequently. Remove the filters and vacuum them or blow them
clean with compressed air. They may also be washed with soap
and water.
There are 3 polyurethane air filters in the Model 220 that require
periodic cleaning. They are located as follows:
•
1 metal-framed filter in the rear of the projector in the bottom
cover-accessible when the rear cover is off ( Figure 4-1 ).
•
1 filter on the bottom of the projector-slides out from the
middle-left side of the projector (grasp the hole in the filter
frame). The filter can be peeled off the Velcro on the frame, if
necessary (
Figure 4-11 ).
•
1 metal-framed filter in the front-left-bottom cover accessible
with the front cover off ( Figure 4-11 ).
4.4 Arc Lamp
The Arc Lamp consists of a Xenon Arc Lamp and heat sync. It is
removed and replaced separately from the other components on
the Arc Lamp Base Assembly.
WARNING!!!
Dangerous light exists in
this area of the projector. Before proceeding with the removal
of any subassemblies below, verify that the circuit breaker at
the rear of the projector is turned off and the power plug is
removed from the AC outlet.
Model 220 Service Manual 4-5