Optical Adjustments; Contrast Adjustment - Panasonic PT-VX500U Service Manual

Optical Adjustments

Before taking optical adjustments below, remove the cabinet top following to the "Mechanical Disassembly".
Adjustments require a 2.0mm hex wrench and a slot screwdriver.
Note: Do not disconnect connectors on the MAIN board, because the projector cannot turn on due to operate the
power failure protection.
WARNING : USE UV RADIATION EYE AND SKIN PRO-
CAUTION: To prevent suffer of UV radiation, those
adjustment must be completed within 25
minutes.

Contrast adjustment

[Before Adjustment]
- Input a 100% of black raster signal.
1
A (Fig.1)
Loosen 3 screws-
2
B
Adjust the slot to obtain the darkest brightness on the screen by
using a slot screwdriver.
3
Tighten the 3 screws-
Repeat steps 1 to 3 for remaining polarized glasses.
-This adjustment should be taken in order of G-panel, R-panel and
B-panel.
-This adjustment should be performed in the darkest room to
improve the precision of adjustment.
TECTION DURING SERVICING
on the polarized glass mounting base.
A
to fix the polarized glass mounting base.
A
-38-
Slot B
Fig.1