Panasonic PT-TW343RE (serv.man5) Service Manual ▷ View online
-29-
Lighting block Disassembly
2. Note on handling of inorganic polarizer
Indication of light in-coming side and
outgoing side
Cleaning capability of polarizers
Indication of light in-coming side and
outgoing side
The incident and exit plane of the polarized glass or
Optical block is shown in the figure below. It shows the
light emitted from the lamp.
The aluminum evaporated surface of inorganic polar-
izer is contact prohibition area. Prohibit touching it with
bare hand, wiping or contacting with the other parts.
Screen side
Lamp side
Incident plane
Polarizer
Exit plane
This projector provides high durable inorganic polarizer which has a rib shaped evaporated aluminum on the glass
surface.
This surface is very delicate. If touching or wiping the surface, the polarizing function will be lost due to damage of
the aluminium rib construction on the surface. Extreme care should be taken to handle the polarizer.
●
Inorganic polarizer handling
Never grasp the surface or edges of the polarizer with bare hand. If fat and oil on your hand adheres on
the edges of polarizer, the linear bolt may appear on the glass surface due to capillarity. Grasp the edges
of the glass with new gloves or with tweezers when handling it.
●
Inorganic polarizer cleaning
When removing the dust on the surface, use a commercial (inert gas) air spray or air blower to remove
them. Never use organic solvents.
2.0mm
2.0mm
2.0mm
2.0mm
Contact prohibition area
Aluminum evaporated surface
Type
wipe cleaning
Incident plane Exit plane
Polarizer-out
R
Organic
OK
OK
G
Inorganic
NG
OK
B
Inorganic
NG
OK
Polarizer-in
R
Organic
OK
OK
G
Organic
OK
OK
B
Inorganic
OK
NG
-30-
Lighting block Disassembly
3. Polarizer-in removal
Polarizer-in
Polarizer-in assy
A
A
A
Fig. 3
*Do not disassembly the
polarized glass from the bottom.
1 Mount the polarized glass at the center of the slot B precisely.
2 Tighten screw A and fix the polarized glass R board.
- Follow step 1-2 to mount the polarized glass G and B.
1. Remove 3 screws A (M2.5x6).
2. Remove lighting case top to unhook 5 hooks on it as
shown in the figure.
3. Pull each polarizer upward off.
Note on polarized glass mounting
A
Slot B
Mount the polarized glass at the center
of the slot B.
-31-
PBS shield
Iris unit
Lighting block Disassembly
1. Remove 2 screws A(M3x8) to remove condenser lens-out assy.
1. Remove 3 screws A(T3x8) to take off the iris unit from the lighting case.
2. Remove 2 screws B(T3x8) to take off the PBS shield from the lighting case.
Fig. 5
4. Condenser lens (OUT) disassembly
Fig. 4
5. PBS and integrator disassembly
A
B
B
A
A
A
A
PBS
Marker
Integrator in
* Rugged surface
facing to the PBS.
Integrator out
* Rugged surface
facing to the PBS
Cutting
edge comes
to this side.
Integrator lens stopper
Integrator lens holder-top
Integrator lens
shield
Integrator lens
holder bottom
PBS holder
-32-
Lighting block Disassembly
D
Fig. 6
B
H
E
C
When disassembling or mounting the optical parts in
the Lighting block, the parts must be mounted in the
specified location and direction as shown in the figure
below.
A
G
6. Locations and directions
No. Parts Name
A
Dichroic mirror (B)
B
Dichroic mirror (G)
C
Condenser lens (R)
D
Condenser lens (G)
E
Condenser lens (B)
F
Reflection mirror(R)
G
Relay lens (IN)
H
Reflection mirror (B)
I
Relay lens (OUT)
F
I
F
Marker comes
this side up
Marker
Click on the first or last page to see other PT-TW343RE (serv.man5) service manuals if exist.