Electrical Adjustments
AV Gain adjustment
1.Receive the
2.Set to VIDEO mode.
3.Enter the service mode.
[R-GAIN ADJUSTMENT]
4.Connect an oscilloscope to test point “TP25R1” (+) and chassis ground
5.Select group no. “2”, item no. “3” and change data value to adjust waveform “a” to be minimum ampli- tude.
[G-GAIN ADJUSTMENT]
6.Connect an oscilloscope to test point “TP25G1” (+) and chassis ground
7.Select group no. “2”, item no. “4” and change data value to adjust waveform “a” to be minimum ampli- tude.
[B-GAIN ADJUSTMENT]
8.Connect an oscilloscope to test point “TP25B1” (+) and chassis ground
9.Select group no. “2”, item no. “5” and change data value to adjust waveform “a” to be minimum ampli- tude.
White Level
(a)
Gamma Shift adjustment
[PC-GAMMA OFF ADJUSTMENT]
1.Receive the
2.Set to COMPUTER mode.
3.Enter the service mode, select group no. “2”, item no. “6” and change data value to reproduce the prop- er gray scale picture on the screen.
[AV-GAMMA OFF ADJUSTMENT]
4.Receive the
5.Set to VIDEO mode.
6.Enter the service mode, select group no. “2”, item no. “6” and change data value to reproduce the prop- er gray scale picture on the screen.
White Balance adjustment
[PC WHITE BALANCE ADJUSTMENT]
1.Receive the
2.Set to COMPUTER mode.
3.Enter the service mode, select group no. “2”, item no. “7” (Red) or “8” (Blue), and change data values respectively to make a proper white balance.
[AV WHITE BALANCE ADJUSTMENT]
4.Receive the
5.Set to VIDEO mode.
6.Enter the service mode, select group no. “2”, item no. “7” (Red) or “8” (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.
Common Center adjustment
1.Receive the 1 dot black & white pattern computer sig- nal.
2.Set to COMPUTER mode.
3.Enter the service mode.
[G-COMMON CENTER ADJUSTMENT]
4.Project only green light component to the screen.
5.Select group no. “3”, item no. “8” and change data value to obtain the minimum flicker on the screen.
6.Project only blue light component to the screen.
7.Select group no. “3”, item no. “9” and change data value to obtain the minimum flicker on the screen.
8.Project only red light component to the screen.
9.Select group no. “3”, item no. “10” and change data value to obtain the minimum flicker on the screen.
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.
