Christie DS Series Service Manual page 40

9-4 Cleaning the dust off the panels and optical filters
1. Preparation
Please prepare cleaning tools and materials as follows. And prepare relatively clean room not to
work in additional dust, while removing operation.
• Swab for cleaning : NX32451, COTTON STICK BB-014
• Air duster (Dust blower, spray can)
• Vacuum cleaner
2. Disassembling and setting up
1) Turn off the projector and unplug the power cord. Wait at least 45 minutes for cooling down.
2) Remove the FRONT COVER, LENS and UPPER CASE in accordance with the instructions for
the chapter Disassembly diagram.
3) Disconnect the LCD panel flexible cables and all the other cables from the MAIN PCB, and
take it off from the projector.
4) Remove the OPTICAL UNIT from the projector, and separate the LCD Prism Shift mech.
assembly by loosen three screws. (Figure 1)
OPTICAL UNIT
3. Cleaning the panels and optical filters
Pay attention not to damage panels and optical
filters. Especially, do not touch or wipe the surfaces
of the optical filters mentioned below when cleaning
the LCD panels.
• Optical filters on both sides of the LCD panel for
R, G, and B colors.
Blow the dust off from LCD panels and optical filters using an air duster.
If you cannot remove the dust on LCD panels with an air blower, wipe the surface of LCD panels
with a swab according the following procedure.
LWU900-DS/LHD878-DS/LWU755-DS
Service Manual
LWU900-DS / LHD878-DS / LWU755-DS
DICHROIC OPTICS UNIT
LCD Prism Shift mech. assembly
Make sure to see the instructions of "OPTICAL UNIT" in the
chapter Disassembly diagram before these works.
Never remove any screws other than the specified. Otherwise, the
optical performance may become worse.
CAUTION
Surface facing the LCD
panel of each optical filter.
Surface facing the LCD
panel of each optical filter.
39
Figure 1
Figure 1
ATTENTION
Surface facing the LCD
panel of each optical filter.
R
LCD panel
G
020-001586-01 Rev. 1 (02-2021)
LIT MAN SERV DS Series
B
LCD panel