Panasonic PT-VW431DU / PT-VW431DE / PT-VW431DEA Service Manual ▷ View online
-29-
Mechanical Disassembly
9. Cable reforming
Reform the cables as shown in the figure below. Place the cables at the original position after replacing the parts.
Guide
Hook
Guide
Wire band
Wire band
SW901
SW902
Fig.9
Hook
Guide
Guide
Guide
Ferrite core Wire band
-30-
Optical Parts Disassembly
Before taking this procedure, remove Cabinet top and MAIN board following to the “Mechanical Disassembly”.
Disassembly requires a 2.0mm hex wrench.
LCD panel/
prism assy
Fig.1
1. LCD panel/prism assy removal
*Note on handling the LCD panel/prism assy
Polarized glasses are very sensitive parts.
Never touch or wipe the surface. When removing the
dust on the surface, use a commercial (inert gas) air
spray to remove them.
IMPORTANT NOTICE on LCD panel/prism assy replacement
LCD panels used for this model cannot be replaced separately. Do not disassemble the LCD panel/prism assy.
These LCD panels are installed with precision at the factory. When replacing the LCD panel, should be replaced
whole of the LCD panels and prism assy at once.
When replacing LCD panel/prism assy, take the optical and electrical adjustments following to the chapter "Adjust-
ment".
1. Remove 4 hex-screw A (M2.5x7.8) to take the LCD panel/prism assy upward
off.
A
A
A
A
There are 2 types of LCD panel/prism assy for this model. Either L-type or R-type LCD panel/prism assy is used on
the projector. Check which type of LCD panel/prism assy is used with the figure below.
When replacing the LCD panel/prism assy, you need to take "Panel type check and setting" on the electrical adjust-
ment for the replaced LCD panel/prism assy.
The gamma-characteristics are different between L-type and R-type LCD panel/prism assy.
How to check the type of LCD panel assy
Check the printed marker on the flat cable of the G-LCD Panel.
GR --> R-type LCD panel/prism assy
GL --> L-Type LCD panel/prism assy
LCD panel type check
GR
GL
L-Type LCD Panel/Prism assy
R-Type LCD Panel/Prism assy
G-Panel
-31-
Optical Parts Disassembly
2. Polarized glass(IN) assy removal
Polarized glass(IN)
Polarized glass(IN) assy
(M2.5x6)x1
Fig.2
3. Projection lens removal
(M2.5x8)x4
Fig.3
Projection lens
Optical unit
Note: The optical unit should be removed from the cabinet bottom before
removing the projection lens.
*Polarized glass is not removed
from the mounting base.
*Note on handling the polarized glass
Polarized glass-in are very sensitive parts.
Never touch or wipe the surface. Grab the
mounting base when handling the polarized
glass assy. When removing the dust on the
surface, use a commercial (inert gas) air
spray to remove them. Never use organic
solvents.
-32-
Optical Parts Disassembly
Condenser lens (OUT)
Condenser lens (OUT) assy
Fig.4
(M2.5x8)x2
4. Condenser lens (OUT) removal
(M2.5x8)
Fig.3-1
Washer x 4
Spring shaft x 4
Screws x 4
3-1. Lens shift unit disassembly
(M2x3)
(M2.5x8)x4
Holder lens
Lens shift screw
Lens shift screw
Mounting lens
Stopper shaft-A
Stopper shaft
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