Read Panasonic PT-VW431DU / PT-VW431DE / PT-VW431DEA (serv.man2) Service Manual online
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Optical Parts Disassembly
IMPORTANT NOTICE on optical block replacement
LCD panels used for this model cannot be replaced separately. Do not disassemble the optical block. These LCD
panels are installed with precision at the factory. When replacing the optical block, should be replaced whole of the
LCD panels and prism assy at once. When replacing the optical block, take the optical and electrical adjustments
following to the chapter "Adjustment".
3-1. Projection lens removal
1. Remove 4 screws-A and remove the projection lens from the optical
block/lens mounter unit.
Optical block/lens mounter unit
Projection lens
A
A
A
A
Optical block type check
There are 2 types of optical blocks for this model. Either L-type or R-type is used on the projector. Check which type
of optical block is used with the figure below. When replacing the optical block, you need to take "Panel type check
and setting" on the electrical adjustment for the replaced optical block.
How to check the type of optical block
Check the printed marker on the flat cable of the G-LCD Panel.
The gamma-characteristics are different between L-type and R-type optical block.
GL
GR
• GL => L-type optical block
• GR =>R-type optical block
L-Type optical block
R-Type optical block
G-LCD panel
Note
Do not remove the optical block from the lens
mounter unit, doing so may cause degradation of
focus and convergence performance.
Fig.3-1
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