Sanyo PLC-SW30 Service Manual page 25

Electrical Adjustments
m
Gamma adjustment
[PC-GAMMA ADJUSTMENT]
1. Receive the 100% whole-white computer signal with
COMPUTER IN [RGB] mode.
2. Enter the service mode.
3. Measure luminance on the screen with the luminance
meter. It is A for the reading of luminance meter.
4. Change the signal source to the 50% whole-white
computer signal with COMPUTER IN [RGB] mode.
16
5. Select item no. " " and change data value to make
the reading of luminance meter to be A x 23%.
[AV-GAMMA ADJUSTMENT]
1. Receive the 100% whole-white composite video sig-
nal with Video [Video] mode.
2. Enter the service mode.
3. Measure luminance on the screen with the luminance
meter. It is B for the reading of luminance meter.
4. Change the signal source to the 50% whole-white
computer signal with Video [Video] mode.
16
5. Select item no. " " and change data value to make
the reading of luminance meter to be B x 22%.
,
Common Center adjustment
1. Receive the 16-step gray scale computer signal with
COMPUTER IN [RGB] mode.
2. Enter the service mode.
3. Project only red light component to the screen.
15
4. Select item no. " " and change data value to obtain
the minimum flicker on the screen.
5. Project only green light component to the screen.
14
6. Select item no. " " and change data value to obtain
the minimum flicker on the screen.
7. Project only blue light component to the screen.
13
8. Select item no. " " and change data value to obtain
the minimum flicker on the screen.
.
White Balance adjustment
[PC WHITE BALANCE ADJUSTMENT]
1. Receive the 16-step gray scale computer signal with
COMPUTER IN [RGB] mode.
2. Enter the service mode, select item no. "
18
" " (Blue), and change data values respectively to
make a proper white balance.
[AV WHITE BALANCE ADJUSTMENT]
3. Receive the 16-step gray scale video signal with
Video [Video] mode.
4. Enter the service mode, select item no. "
18
" " (Blue), and change data values respectively to
make a proper white balance.
Confirm that the same white balance is obtained in
video and computer input.
NOTE ON WHITE UNIFORMITY
ADJUSTMENT
If you find the color shading on the screen, please
adjust the white uniformity by using the proper comput-
er and "Color Shading Correction" software supplied
separately. The software can be ordered as follows;
COLOR SHADING CORRECTION ver.. 3.0
Service Parts No.
-25-
17
" (Red) or
17
" (Red) or
645 056 6288