Optical Adjustments; Contrast Adjustment - Sanyo PLC-XE31 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. When you adjust Integrator lens or Relay lens
adjustment, you need to disconnect FPC cables of LCD panels on the main board.
Optical adjustment requires 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
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
Loosen a screw (Fig.1-1/1-2) on the polarized glass mounting
base which you intend to adjust.
2
Turn the polarized glass mounting base as shown in Fig.1-1 to
obtain the darkest brightness on the screen.
3
A
Tighten the screw to fix the polarized glass mounting base.
Repeat steps 1 to 3 for remaining polarized glasses.
PROTECTION DURING SERVICEING
Polarized
mounting base
Main Board
A
B-Polarized Glass
Mounting Base
-21-
A
glass
Fig.1-
R-Polarized Glass
Mounting Base
G-Polarized Glass
A
Mounting Base
Fig.1-
1
A
2