Panasonic PT-TW370 / PT-TX430 / PT-TX340 Service Manual ▷ View online
DIS-9
SECTION 2 DISASSEMBLY PROCEDURE
<TW370/TX430/TX340>
1. Remove the fuse from the fuse support.
2. Install the fuse as shown in the following figure.
1. Remove a foot rubber.
2. Remove a support axis by pushing it out.
3. Take out the adjustable stand shaft, foot spring and foot case of the adjustable foot.
1. 7. 1. Fuse removal
1. 8. Adjustable foot removal
Top view of fuse installation
Foot spring
Support axis
Adjustable stand shaft
Foot case
Foot rubber
DIS-10
SECTION 2 DISASSEMBLY PROCEDURE
<TW370/TX430/TX340>
<Cable reforming>
Reform the cables as shown in the figure below. Place the cables at the original places after replacing the parts.
P3004
P8003
P3006
P1003
P1003
P5003
FN3002
FN3001
P5030 P3001
P3002
FN3003
FN3005
FN3004
DIS-11
SECTION 2 DISASSEMBLY PROCEDURE
<TW370/TX430/TX340>
GR
GL
L-
type Optical block
R-type Optical block
G-Optical block
Optical block
Projection lens
* Note on handling the optical block
Optical block and polarized glasses are
very sensitive parts.
Use air blower to clear the dust on the
surface of the Optical block
(For more details about handling the inorganic
polarized glass, please read the next page).
polarized glass, please read the next page).
Important notice on optical block replacement
The Optical block used for this model cannot be
replaced separately. Do not disassemble the Optical
block. These Optical block are installed with precision at
the factory. When replacing the Optical block, should be
replaced whole of the Optical block at once.
After replacing Optical block, take the optical and
electrical adjustments following to the chapter
"Adjustment".
1. Remove 2 screws A (M3x8) and 4 screws B(T3x8) , and then take the lens/Opticalblock assy off upward.
2.Remove 4 screws C (M2.5x12), separate the Optical block with the projection lens.
There are 2 types of optical block, named R-type and L-type.
When replacing the optical block, check the printed marker on the flat cable of the G-LCD panel and
use the same type of the optical block. If not used the same type, you will find the color shading or
wrong white balance picture on the screen.
How to check optical block
Please check the print serial number on the G-Optical block 's cable.
GR --> R-Optical block
GL --> L-Optical block
Check optical block
Top view of LCD panel/prism assy
G-LCD panel
B-LCD panel
Polarized glass OUT(B)
Polarized glass OUT(G)
Polarized glass OUT(R)
R-LCD panel
B
C
CC
A
A
2. 1. Optical block removal
2. Optical Parts Disassembly
* Before taking the procedure, remove cabinet top and main board following to the "Mechanical Disassembly".
* Disassembly tools: 2.0mm hex wrench and screwdriver.
* Disassembly tools: 2.0mm hex wrench and screwdriver.
B B B
C
DIS-12
SECTION 2 DISASSEMBLY PROCEDURE
<TW370/TX430/TX340>
Note on handling of inorganic polarizer
Indication of light in-coming side and outgo-
ing side
Cleaning capability of polarizer
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 polarizer 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
Inorganic
OK
NG
B
Inorganic
OK
NG
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