Sanyo PLC-WTC500AL Service Manual page 54

Electrical Adjustment
PC, Video, Component Manual adjustment
When the PC, Video or Component Auto Calibration
fails, take the following manual adjustment instead of
auto calibration.
[1] Manual adjustment (Pc)
Input mode Computer mode (Input 1 RGB)
Input signal 16-step gray scale computer signal
1. Select Group "200", No. "72" and set data value to "1".
2. Select Group "200", No. "70" and set data value to "0".
3. Adjust the data values listed in the table below as the
100% white part on the screen becomes the most
noisy (darkest).
Group No. Adjustment
10 - 3 ADC-Green Gain
10 - 4 ADC-Red Gain
10 - 5 ADC-Blue Gain
4. Select Group "200", No. "70" and set data value to "1".
5. Adjust the data values listed in the table below as the
100% white part on the screen becomes the most
noisy (darkest).
Group No. Adjustment
0 - 3 ADC-Green Gain
0 - 4 ADC-Red Gain
0 - 5 ADC-Blue Gain
6. Select Group "200", No. "70" and set data value to "0".
7. Select Group "200", No. "72" and set data value to "1".
Image example of manual adjustment
for [Pc / Video]
Black and noisy
image appears
16-step gray scale
White 100%
[2] Manual adjustment (component)
1. At first, input the 100% color bar signal (480i). * After
2. Select Group "200", No. "72" and set data value to "1".
3. Select Group "200", No. "71" and set data value to "1".
4. Adjust the data values listed in the table below as the
5. Select Group "200", No. "71" and set data value to "0".
6. Adjust the data values listed in the table below as the
7. Select Group "200", No. "71" and set data value to "1".
8. Select Group "200", No. "72" and set data value to "1".
[3] Manual adjustment (Video)
1. Adjust the data values listed in the table below as the
Black 100%
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Input mode Video mode (Input 2 -Component)
Input signal 100% color bar signal (480i)
100% color bar signal (480p)
100% color bar signal (720p)
100% color bar signal (1080i)
that, repeat the adjustment for remaining signals.
100% white part on the screen becomes the most
noisy (darkest).
Group No. Adjustment
0 - 3 Y Gain
100% white part on the screen becomes the most
noisy (darkest).
Group No. Adjustment
10 - 3 Y Gain
Input mode Video mode (Input 3 Video)
Input signal 16-step gray scale composite video
signal
100% white part on the screen becomes the most
noisy (darkest).
Group No. Adjustment
20 - 0 Y Level
Image example of manual adjustment
for [component]
Black and noisy
image appears
W Y C G M
100% full color bar
R B BK