Lighting Area Adjustment - Panasonic PT-LB20NTU Service Manual

PT-LB20NTU / PT-LB20NTE / PT-LB20NTEA / PT-LB20U / PT-LB20E / PT-LB20EA / PT-LB20SU / PT-LB20SE / PT-LB20SEA / PT-LB20VU / PT-LB20VE / PT-LB20VEA
8.4.3. Adjustment Procedure
[When replacing single LCD panel (R, G or B)]
Prepare 2 pieces of thick black paper (23 mm × 100 mm) that
can be shaded.
· Cover and shade LCD panels with the paper except the
panel for adjustment.
The procedure is described as an example when LCD panel (B)
is replaced.
1. Display the green crosshatch pattern and adjust the lens
focus.
2. Display green and blue crosshatch patterns.
3. Adjust focus by shifting the panel adjuster for LCD panel (B)
back and forth, then tighten the 2 screws.
4. Adjust the LCD panel (B) position so that the vertical center
of blue crosshatch pattern is overlapped with the vertical
center of green crosshatch pattern.
5. Adjust the LCD panel (B) position so that the horizontal
center of blue crosshatch pattern is overlapped with the
horizontal center of green crosshatch pattern.
6. Correct the tilt of the blue crosshatch pattern by adjusting
the LCD panel (B) position.
7. Display green, red and blue crosshatch patterns and
confirm the convergence. If it is necessary, fine adjust the
convergence so that the red and/or blue crosshatch pattern
is overlapped with green one.
Repeat steps (1) to (3) until the green and blue crosshatch
patterns merge into a cyan pattern.
8. After the adjustment, reassemble the projector according to
the steps 8 through 11 in the section 7.13. "Replacement of
LCD Panel".
8.5.

Lighting Area Adjustment

8.5.1. Tools to be used
Service Kit (Part No. TZSH07015): This kit is composed of 3
extension flexible cables and 3 connector extension cables.
Note:
· Consult your dealer or Authorized Service Center for the
service kit.
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