BOXLIGHT CP-300t, Service Manual

Page: 21 / 104

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[Before Adjustment]
- Input a 100% of black raster signal.
[R/G/B-CONTRAST ADJUSTMENT]
1
Loosen a screw
A
(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
Tighten the screw
A
to fix the polarized glass mounting base.
Repeat steps 1 to 3 for remaining polarized glasses.
B-Polarized Glass
Mounting Base
R-Polarized Glass
Mounting Base
G-Polarized Glass
Mounting Base
A
A
A
Slot B
Fig.1-
2
Fig.1-
1
Polarized
glass
mounting base
■
Optical Adjustments
Main Board
A
Contrast adjustment
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, K8H, K8R and K8S on the main board, because the projector can
not turn on due to operate the power failure protection.