Sanyo PLV-75 Series, Service Manual

Page: 20 / 132

-20-
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.
Note: Do not disconnect connectors K8L, K8X, K8D, K8G and K8E on the main board, because the projector can
not turn on due to operate the power failure protection.
Optical Filter(WV)
Optical Filter(WV)
Polarized Glass
Polarized Glass
Fig.1-
1
Polarized
glass
mounting base
A
Fig.1-
2
B
Fig.1-
3
C
[Before Adjustment]
- Input a 100% of black raster signal.
1
Loosen a screw
A
( Fig.1-1/1-4 ) on the polarized glass mount-
ing base which you intend to adjust.
2
Turn the polarized glass mounting base with knob
B
as shown
in
Fig.1-2
to obtain the darkest brightness on the screen. (The
polarized glass and optical filter move together.)
3
Turn the optical filter mounting base with know
C
as shown
in
Fig.1-3
to obtain the black color uniformity on the
screen.(Move only the optical filter.)
4
Tighten the screw
A
to fix the polarized glass mounting base.
Repeat steps 1 to 4 for remaining R, G or B contrast adjustment.
Contrast adjustment
WARNING : USE UV RADIATION EYE AND SKIN
PROTECTION DURING SERVICING.
CAUTION:
To prevent suffer of UV radiation, those adjustments
must be completed within 25 minutes.