Eiki LC-X71 LC-X71L service manual ⁄2AV Gamma-shift adjustment, ⁄3AV White Balance adjustment

Electrical Adjustments

⁄2AV Gamma-shift adjustment

1.Receive the 100% whole-white composite video sig- nal with Input 3 [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 signal with Input 3 [Video] mode.

5.Select group no. “210”, item no. “15” and change data value to make the reading of luminance meter to be

B x 22±1%.

Note:

If the luminance meter is not equipped, you can take another method instead as follows;

1.When the main board is replaced, the data value at group no. “210”, item no. “15” of the previous main board should be copied manually.

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.

⁄3AV White Balance adjustment

1.Receive the 50% whole-white composite video signal with Input 3 [Video] mode.

2.Enter the service mode, select group no. “210”, item no. “16” (Blue) or “17” (Red), and change data values respectively to make a proper white balance.

Confirm that the same white balance is obtained in video and computer input.

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