Optical Adjustments - Sanyo PLC-XU40 Service Manual

■ Optical Adjustments

Before taking optical adjustments below, remove the Cabinet Top and Main Board following to the "Mechanical
Disassemblies"
Adjustments require a 2.0mm hex wrench and a slot screwdriver. When you adjust Condenser lens, Condenser
lens-out or Relay lens adjustment, you need to disconnect some connectors and FPC cables of LCD panels on the
main board.
Note: Do not disconnect connectors K8N, K8P and K8H on the main board, because the projector can not turn on
due to operate the power failure protection.
Contrast adjustment
[Before Adjustment]
- Input a 100% of black raster signal.
[R/G/B-CONTRAST ADJUSTMENT]
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.
Slot B
Polarized
mounting base
Main Board
A
B-Polarized Glass
Mounting Base
-21-
glass
Fig.1-
R-Polarized Glass
Mounting Base
A
G-Polarized Glass
A
Mounting Base
Fig.1-
A
1
2