Cleaning Lenses, Ila Assemblies And Mirrors - Hughes JVC 220 Service Manual

Chapter 3 Service Adjustments
3.12 Cleaning Lenses, ILA
3-18
System software update successful
Command: _
The software update is complete. To restart the projector, type in
the "reboot" command and press Enter. The projector will now
restart with the updated System Software.
The projection lens is the only item that requires periodic cleaning.
Other assemblies are covered to prevent dust entering or finger
smudging. Cleaning may be needed for special circumstances
such as replacing an assembly. Cleaning should only require
removing excessive dust (use canned air such as "Office Duster" or
"Aero Duster") or removing fingerprint smudges (use "Kodak Lens
paper", or equivalent) from the projection lens. As much as
possible, clean the optics only when absolutely necessary.
Projection Lens: Use lens paper and wipe the lens clean in a
vertical motion from top to bottom. Use compressed air to blow
excess dust from the lens. An optical lens cleaning solution can
also be used to remove finger smudges.
®
ILA Assembly: Clean the ILA
air only. Do not wipe the ILA assembly faces.
CRT Faces: Use compressed air to blow dust off and lens paper
to clean face.
Relay Lens: Same as Projection Lens.
Mirrors and Polarizing Beam Splitter Windows: The Optical
Shield covers the Dichroic Mirror Assembly and Polarizing Beam
Splitter windows. Normally cleaning is not needed. Clean only if
absolutely necessary using compressed air. Do not wipe mirrors.
® Assemblies and Mirrors
®
assembly faces with compressed
Model 220 Service Manual