Eiki LC-XNS2600 Service Manual page 31

ADC auto calibration[Video]
1 Input 16 steps gray scale signal to VIDEO terminal.
2.Enter service mode.
3.Select group 260, item 1, change the data from o to 1.
After calibrating, the data of group 260, item 0 will change to o automatically.
If the adjustment above failed, please adjust according to the following steps:
Pedestal [VGA IN 1]
1 Input standard adjust signal to VGA IN1 terminal.
2 Enter the service adjust mode.
3 Connect the oscope (+) to TP9087 and (-) to GND.
4 Select item 0 of Group 0, adjust the pedestal leve to the
same level of black level.
5 Connect the oscope (+) to SIG9001 and (-) to GND.
6 Select item 1 of Group 0, adjust the pedestal leve to the
same level of black level.
7 Connect the oscope (+) to SIG9002 and (-) to GND.
8 Select item 2 of Group 0, adjust the pedestal leve to the
same level of black level.
Optimizing adjustment[VGA IN 1]
1 Input standard adjust signal to VGA IN1 terminal.
2 Enter the service adjust mode.
3 Connect the oscope (+) to TP9087 and (-) to GND.
4 Select item 3 of Group 0, change the value to make the
amplitude "a" to minumum.
5 Connect the oscope (+) to SIG9001 and (-) to GND.
6 Select item 4 of Group 0, change the value to make the
amplitude "a" to minumum.
7 Connect the oscope (+) to SIG9002 and (-) to GND.
8 Select item 5 of Group 0, change the value to make the
amplitude "a" to minumum.
White Level
(a)
Pedestal [Component]
1 Input standard adjust signal to component terminal.
2 Enter the service adjust mode.
3 Connect the oscope (+) to TP9087 and (-) to GND.
4 Select item 0 of Group 0, adjust the pedestal leve to the
same level of black level.
5 Connect the oscope (+) to SIG9001 and (-) to GND.
6 Select item 1 of Group 0, adjust the pedestal leve to the
same level of black level.
7 Connect the oscope (+) to SIG9002 and (-) to GND.
8 Select item 2 of Group 0, adjust the pedestal leve to the
same level of black level.
Optimizing adjustment[Component]
1 Input standard adjust signal to component terminal.
2 Enter the service adjust mode.
3 Connect the oscope (+) to TP9087 and (-) to GND.
4 Select item 3 of Group 0, change the value to make the
amplitude "a" to minumum.
5 Connect the oscope (+) to SIG9001 and (-) to GND.
6 Select item 4 of Group 0, change the value to make the
amplitude "a" to minumum.
7 Connect the oscope (+) to SIG9002 and (-) to GND.
8 Select item 5 of Group 0, change the value to make the
amplitude "a" to minumum.
(a)
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Electrical adjustment
White Level