Cleaning - Sanyo PLC-XL50A Service Manual

Maintenance and Cleaning

Cleaning

After long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarized glass, lens, etc.,
causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit.
Remove dust and other particles using air spray. If dirt cannot be removed by air spray, disassemble and clean the optical
unit.
Cleaning with air spray
1. Remove the cabinet top following to "Mechanical Disas-
semblies".
. Clean up the LCD panel and polarizing plate by using the
air spray from the cabinet top opening.
Caution:
Use a commercial (inert gas) air spray designed for cleaning
camera and computer equipment. Use a resin-based nozzle
only. Be vary careful not to damage optical parts with the
nozzle tip. Never use any kind of cleanser on the unit. Also,
never use abrasive materials on the unit as this may cause
irreparable damage.
disassembly Cleaning
Disassembly cleaning method should only be performed
when the unit is considerable dirty and cannot be sufficient-
ly cleaned by air spraying alone.
Be sure to readjust the optical system after performing
disassembly cleaning.
1. Remove the cabinet top and main units following to "Me-
chanical Disassemblies".
. Remove the optical base top following to "Optical Unit
Disassemblies". If the LCD panel needs cleaning, remove
the LCD panel unit following to "LCD panel replacement".
3. Clean the optical parts with a soft cloth. Clean extremely
dirty areas using a cloth moistened with alcohol.
Caution:
The surface of the optical components consists of multiple
dielectric layers with varying degrees of refraction. Never
use organic solvents (thinner, etc.) or any kind of cleanser
on these components.
Since the LCD panel is equipped with an electronic circuit,
never use any liquids (water, etc.) to clean the unit. Use of
liquid may cause the unit to malfunction.
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