Optical Adjustments - Sanyo PLV-75 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.
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.
WARNING : USE UV RADIATION EYE AND SKIN
CAUTION:
To prevent suffer of UV radiation, those adjustments
must be completed within 25 minutes.
[Before Adjustment]
- Input a 100% of black raster signal.
Contrast adjustment
1
A
Loosen a screw (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
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
in Fig.1-3 to obtain the black color uniformity on the
screen.(Move only the optical filter.)
4
A
Tighten the screw to fix the polarized glass mounting base.
Repeat steps 1 to 4 for remaining R, G or B contrast adjustment.
PROTECTION DURING SERVICING.
Polarized
mounting base
B
Optical Filter(WV)
Fig.1-
2
B
as shown
C
as shown
glass
C
-20-
A
Polarized Glass
Optical Filter(WV)
Fig.1-
1
Polarized Glass
Fig.1-
3