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DIS-13
SECTION 2 DISASSEMBLY PROCEDURES
3.2. Projection lens and optical block assy removal
<note> Before removing the projection lens and optical block assy, take out the lighting case from the bottom case.
1. Remove 4 screws-A and remove the projection lens and optical block assy from the lighting case.
A
A
A
A
Lighting case
projection lens and optical block assy
A
SBXAA257R8SAA
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 LCD panel, should be replaced whole of the LCD panels and
prism assy at once.
When replacing optical block, take the optical and electrical adjustments following to the chapter "Adjustment".
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 optical block, take the optical and electrical adjustments following to the chapter "Adjustment".
Note
Do not remove the optical block from the
lens mounter unit, doing so may cause
degradation of focus and convergence
performance.
Do not remove the optical block from the
lens mounter unit, doing so may cause
degradation of focus and convergence
performance.
3.2.1 Projection lens removal
1. Remove 4 screws-A and remove the projection lens from the optical block/lens mounter unit.
<note> When taking the cleaning or replacing the polarizers, we recommend not to remove the
<note> When taking the cleaning or replacing the polarizers, we recommend not to remove the
projection lens from the optical block/lems mounter.
Optical block/lens mounter unit
Projection lens
A
A
A
A
DIS-14
SECTION 2 DISASSEMBLY PROCEDURES
Polarizer OUT(G)
(Inorganic type)
Polarizer OUT(R)
(Inorganic type)
(Inorganic type)
AL evaporated side
(In-coming side)
AL evaporated side
(In-coming side)
Polarizer OUT(B)
(Inorganic type)
AL evaporated side
(In-coming side)
Green marker
Red marker
Blue marker
1. Remove each polarizer. As the polarizers are attached with adhesive tape, remove them carefully.
<Note> When replacing, pay attention not to scratch or break the surrounding parts (Prism , LCD panel, etc.). As the part
of LCD panels are adjusted preciously at the factory, handle the optical block not to apply any power force on it.
We recommend that the projection lens should be mounted on the optical block while taking the replacement.
We recommend that the projection lens should be mounted on the optical block while taking the replacement.
• Insert the edge of flat screw driver into the adhesive part of the polarizer and remove it bit by bit by turning the driver.
(See below figure)
3.2.2. Polarizer-out replacement
Before replacing the polarizer, refer to "Note on handling of inorganic polarizer" on item 4. optical parts cleaning.
Polarizer OUT(G)
Flat screw driver
2. Cleanly remove the fragment of old adhesive tape on the optical block.
3. Attach 2 adhesive tapes onto the surface of out-going side of a new polarizing plate as shown in the figure.
3. Attach 2 adhesive tapes onto the surface of out-going side of a new polarizing plate as shown in the figure.
<Note>
• The adhesive tapes should be attached within 2.0mm from the edge. After attaching, remove the protection sheet on it.
• Pay attention not to touch the contact prohibition area.
• The adhesive tapes should be attached within 2.0mm from the edge. After attaching, remove the protection sheet on it.
• Pay attention not to touch the contact prohibition area.
2.0mm
2.0mm
2.0mm
2.0mm
2.0mm
2.0mm
Adhesive tape
Out-going side
Adhesive tape
Parts no.
Parts name
Q'ty
VUM575TEKIT
Polarizer Tape
1 sheet
(This sheet includes 42 pieces of adhesive tapes)
DIS-15
SECTION 2 DISASSEMBLY PROCEDURES
Polarizer
OUTG)
OUTG)
Optical block
4. Mount a new polarizer onto the correct position carefully. Place the polarizer along the mounting frame guide. (Refer to
figure below)
<Note> While mounting, Do not touch or scratch the contact prohibition area on the surface of in-coming side of polarizer.
• Insert the polarizer into the optical block from the side as shown in the figure and place it along the mounting frame guide.
• After placing, press the both of the side edges gently to fix the polarizer. Confirm that the polarizer is mounted in parallel
with the surface of panel and prism.
• Insert the polarizer into the optical block from the side as shown in the figure and place it along the mounting frame guide.
• After placing, press the both of the side edges gently to fix the polarizer. Confirm that the polarizer is mounted in parallel
with the surface of panel and prism.
* Mount the polarizers as the point marker comes top right corner
viewing from the light out-going side of the polarizer.
Polarizer
OUT(G)
Mounting frame guide (groove)
5. Replace remaining polarizer OUT(B) and (R) with the same procedure.
6. After completing the mounting, project the cross-hatch pattern to check that there is no miss-convergence on the screen.
DIS-16
SECTION 2 DISASSEMBLY PROCEDURES
A
SM2DN258R0SV-
B
SBXAA257R8SAA
C
SM2DN203R0SV-
Washer x 4
Spring shaft x 4
Screws x 4
3.2.3. Lens mounter unit disassembly
A
B
B
B
B
C
A
A
A
Holder lens
Lens shift screw
Lens shift screw
Optical block/Lens mounter unit
Stopper shaft-A
Stopper shaft
Note
Do not remove the optical block from the
lens mounter unit, doing so may cause
degradation of focus and convergence
performance.
Do not remove the optical block from the
lens mounter unit, doing so may cause
degradation of focus and convergence
performance.
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