promethean PRM-30A Service Manual page 32

Electrical Adjustments
n Common Voltage adjustment
Input mode Computer 1 (RGB)
Input signal 5 0%-RGB pattern computer signals
or 16-step gray scale computer sig-
nal
1. Enter the service mode.
. S elect Group "100", No. "92" and then change data
value from "0" to "2" to reduce the panel frequency.
3. C hange data value to obtain the minimum flicker for
each color on screen.
Group No. Adjustment
101 - 0 for red flicker
101 - 1 for green flicker
101 - 2 for blue flicker
4. S elect Group "100", No. "92" and then change data
value from "2" to "0".
m 50% White adjustment [PC]
Equipment Luminance meter
Input mode Computer 1 (RGB)
Input signal 1 00%-white and 50%-gray com-
puter signal
1. Enter the service mode.
. I nput the 100%-white computer signal and measure
luminance on the screen with the luminance meter. It
A
is for the reading of luminance meter.
3. C hange the signal source to the 50%-white computer
signal.
100
4. S elect group no. " ", item no. "
Data value to make the reading of luminance meter
A x 22%.
to be
, 50% White adjustment [Video]
Equipment Luminance meter
Input mode Video (Video)
Input signal 1 00%-white and 50%-gray compos-
ite video signal
1. Enter the service mode.
. I nput the 100%-white composite video signal and
measure luminance on the screen with the luminance
A
meter. It is for the reading of luminance meter.
3. C hange the signal source to the 50%-white composite
video signal.
100
4. S elect group no. "
Data value to make the reading of luminance meter to
A x 22%.
be
6
" and change the
6
", item no. " " and change the
White Balance adjustment [PC]
.
Input mode Computer 1 (RGB) mode
Input signal 1 6-step gray scale or 50% white pat-
tern computer signal
1. Enter the service mode.
. C hange data value to obtain the proper white balance.
Group No. Adjustment
100 - 7 Red color balance
100 - 8 Blue color balance
White Balance adjustment [Video]
⁄0
Input mode Video (Video) mode
Input signal 1 6-step gray scale or 50% white
pattern composite video signal
1. Enter the service mode.
. C hange data value to obtain the proper white balance.
Group No. Adjustment
100 - 7 Red color balance
100 - 8 Blue color balance
Color Shading Correction adjustment
⁄1
If the correction of the Color shading adjustment is nec-
essary, please adjust the "Color shading" by using the
"COLOR SHADING CORRECTION" software included
in the PROJECTOR SERVICE TOOL CD-ROM supplied
separately.
The color shading correction adjustment for this model
should be performed with the whole-gray patterns speci-
fied as below.
4-input patterns:
6.25% gray, 12.5% gray, 25% gray, 50% gray
-3-