Panasonic PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA Service Manual ▷ View online
3. Unscrew the 2 screws and remove the exhaust fan.
4. Unscrew the 3 screws fixing the power block (B/Q-Module
and P-Module).
5. Lift the power block, then unscrew the 1 screw and remove
the lamp connector terminal.
Note:
·
Because the lead wire between the power block and
the lamp connector terminal is short, be careful not
to apply excessive force into it.
the lamp connector terminal is short, be careful not
to apply excessive force into it.
6. Remove the power block.
7. Unscrew the 4 screws and separate the ballast unit and the
power unit.
8. Unscrew the 2 screws.
9. While pressing to shut each hook of the 2 resinous stands,
remove the B/Q-Module.
7.9. Removal of P-Module
1. Remove the power unit (P-Module block) according to the
steps 1 through 7 in the section 7.8. "Removal of B/Q-
Module".
Module".
2. Unscrew the 2 screws.
3. While pressing to shut each hook of the 2 resinous stands,
remove the P-Module.
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PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA
7.10. Removal of Lamp Unit
1. Loosen the 2 screws until they idle, remove the lamp unit
cover.
2. Loosen the 3 screws until they idle, remove the lamp unit
with the handles.
Note:
·
When installing the lamp unit in the main unit, place
it in a specified position and press the connector
side and the opposite sides of the lamp unit (arrow
positions shown in the figure below), and confirm the
lamp unit is inserted securely.
it in a specified position and press the connector
side and the opposite sides of the lamp unit (arrow
positions shown in the figure below), and confirm the
lamp unit is inserted securely.
Then, tighten the 3 screws fixing the lamp unit, and
attach the lamp unit cover.
attach the lamp unit cover.
7.11. Removal of Analysis Block
and Projection Lens
1. Remove the A-P.C.Board block according to the steps 1
through 5 in the section 7.3. "Removal of A-P.C.Board".
2. Loosen the 3 screws until they idle, remove the lamp unit
with the handle.
3. Unscrew the 3 screws and remove the block of Analysis
Block, LCD Block and Projection Lens.
4. Unscrew the 2 screws A and remove the LCD block .
5. Unscrew the 4 screws B and remove the projection lens
(the analysis block remains).
7.12. Removal of LCD Block
1. Remove the A-P.C.Board block according to the steps 1
through 5 in the section 7.3. "Removal of A-P.C.Board".
2. Unscrew the 2 screws and remove the LCD block.
Note:
·
Be careful not to touch the surface of prism and LCD
panel.
panel.
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PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA
7.13. Replacement of LCD Panel (B)
1. Remove the LCD block according to the section 7.12.
"Removal of LCD Block".
Note:
·
Be careful not to touch the surface of prism and LCD
panel.
panel.
2. Cut the 4 LCD panel installation spindles at the position A
and remove the LCD panel.
3. Cut the 4 LCD panel installation spindles at the position B
and remove them.
Notes:
·
Work carefully not to apply external force around the
spindle part by using a cutter, cutting nipper or the
like for cutting the spindle.
spindle part by using a cutter, cutting nipper or the
like for cutting the spindle.
·
Adjust the height after the spindle is cut to 1 mm or
less.
less.
4. Attach the base plate with 4 screws.
5. Tighten the 2 screws temporarily just until new LCD panel
(with the panel attachment and panel adjuster) can be
shifted by your fingers.
shifted by your fingers.
Note:
·
The panel adjustment fittings set (panel attachment,
panel adjuster and base plate) is an option for
service.
panel adjuster and base plate) is an option for
service.
6. Reassemble
the
projector
in
the
reverse
order
of
disassembling, but leave the upper case and the screws
fixing the A-P.C.Board block as they are removed.
fixing the A-P.C.Board block as they are removed.
7. Adjust the convergence according to the section 8.3.
"Convergence Adjustment".
8. After the adjustment, while paying attention not to vary the
adjusting result, tighten the 2 screws fixing the panel
attachment with a hexagon head wrench.
attachment with a hexagon head wrench.
Note:
·
Prepare a hexagon head wrench processed short.
9. Reassemble the projector as it was.
7.14. Replacement of Incidence
Polarizer (G)
1. Remove the A-P.C.Board block according to the steps 1
through 5 in the section 7.3. "Removal of A-P.C.Board".
2. Mark positions of the incidence polarizer (G).
Note:
·
Mark accurately as possible because the marks will
18
PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA
be
used
for
resetting
the
incidence
polarizer
position.
3. Unscrew the 1 screw and remove the incidence polarizer
(G).
4. Attach a new incidence polarizer (G) and align it with the
mark.
5. Tighten the 1 screw with care not to move the incidence
polarizer position.
7.15. Replacement of Incidence
Polarizer (R and B)
1. Remove the A-P.C.Board block according to the steps 1
through 5 in the section 7.3. "Removal of A-P.C.Board".
2. Unscrew the 2 screws and remove the LCD block.
Note:
·
Be careful not to touch the surface of prism and LCD
panel.
panel.
3. Unscrew the 3 screws and remove the analysis case
(upper) .
Note:
·
The incidence polarizer (G) is installed in the
analysis case (upper). Handle with care not to apply
external force to the incidence polarizer (G).
analysis case (upper). Handle with care not to apply
external force to the incidence polarizer (G).
4. Replace the incidence polarizer.
Note:
·
Do not touch the incidence polarizer directly by the
hand.
hand.
Must use a fingerstall or clean gloves.
7.16. Replacement of Projection
Polarizer
·
The procedure is described as an example of projection
polarizer (B).
polarizer (B).
1. Remove the LCD block according to the section 7.12.
"Removal of LCD Block".
Note:
·
Be careful not to touch the surface of prism and LCD
panel.
panel.
2. Remove the projection polarizer which requires replacing.
(The projection polarizer is secured with adhesive tape.)
Notes:
·
Be careful not to damage peripheral components
(prism, LCD panel, etc.).
(prism, LCD panel, etc.).
·
Use tweezers.
3. Install new projection polarizer.
a. Put adhesive tape on the projection polarizer.
b. Stick the projection polarizer on the specified position.
Notes:
·
Align the projection polarizer with the guides
(lower, side) of LCD block.
(lower, side) of LCD block.
·
Be careful not to touch the surface of projection
polarizer.
polarizer.
·
Use tweezers.
19
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