3M
Multimedia Projector MP8670/8745/8755/8770
Adjustments
Copyright
2000, 3M IPC. All Rights Reserved.
1-17
1-7-9.
White Balance Adjustment
Make this adjustment after completing NRSH
adjustment.
1.
Use an SVGA (MP8670) or XGA (MP8745) VESA
(60) timing signal to input a 0.7 V p-p, 16-step
monochrome green signal.
2.
Use
DAC-P – SUB BRIGHT
and
DAC_P – SUB
CONTRAST-G
from the adjustment menu for
optimum shading characteristics.
√√
Note
Lock DAC-P – SUB BRIGHT – G at 30.
Lock DAC-P – BLACK2-GAIN – G at 50.
Use
DAC-P – SUB-BRIGHT – G
to adjust the last
two of the 16-steps on the bright side so they can no
longer be distinguished then come back slightly.
After adjusting, if contrast is insufficient, use
DAC-
P SUB CONTRAST – G
to slightly increase
contrast. Repeat step 3.
To lower only the black level, adjust
BLACK2-
GAIN – G.
3.
Use an SVGA (MP8670) or XGA (MP8745) VESA
(60) timing signal to input a 0.21V p-p White signal.
4.
Use
DAC-P – SUB BRIGHT – R
and
DAC-P –
SUB BRIGHT
– B in the adjustment menu to
adjust color coordinates in the center of the screen
to the following:
X = 0.280
±±
0.005
Y = 0.340
±±
0.01
(Low brightness white level)
