Replacement Of Polarizer; Replacement Of Pbs Array (Analysis Block) - Panasonic PT-L785U Service Manual

8.14. Replacement of Polarizer

1. Take the A-P.C.Board block out according to the steps 1
through 6 in the section 8.5. "Removal of A-P.C.Board".
2. Mark positions of the polarizer (R/G/B).
Note:
· Mark accurately as possible because the marks will
be used for resetting the polarizer position.
3. Unscrew each screw fixing the polarizer and remove the
polarizer.
4. Attach a new polarizer and align it with the mark.
5. Tighten the screw fixing the polarizer with care not to move
its position.
8.15. Replacement of PBS Array
(Analysis Block)
1. Take the A-P.C.Board block out according to the steps 1
through 6 in the section 8.5. "Removal of A-P.C.Board".
2. Unscrew the 1 screw and remove the bimetal holder.
3. Unscrew the 2 screws and remove the lamp fan.
4. Unscrew the 9 screws and remove the analysis case
(upper) upward.
Notes:
· Polarizers (R/G/B) are attached on the analysis case
(upper). Handle with care not to apply external force
to the polarizers.
· Do not touch optical components (lens, mirror, etc.)
of the analysis block. If dirt or aberration has brought
into existence, efficiency of the projector may
deteriorate.
5. Take the PBS array out upward with its edges, then replace
it.
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PT-L785U / PT-L785E