-28-Electrical Adjustments1. Receive the 16-step gray scale computer signal.2. Set to COMPUTER 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 datavalue 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 datavalue 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 datavalue to adjust waveform “a” to be minimum ampli-tude.White Level(a)PC Gain adjustment1. Receive the 16-step gray scale computer signal.2. Set to COMPUTER mode.3. Enter the service mode.[R-OFFSET ADJUSTMENT]4. Connect an oscilloscope to test point “TP25R1” (+)and chassis ground (-).5. Select group no. “3”, item no. “11” and change datavalue to adjust the waveform “a” (black portion ) tobe maximum amplitude.[G-OFFSET ADJUSTMENT]6. Connect an oscilloscope to test point “TP25G1” (+)and chassis ground (-).7. Select group no. “3”, item no. “12” and change datavalue to adjust the waveform “a” (black portion ) tobe maximum amplitude.[B-OFFSET ADJUSTMENT]8. Connect an oscilloscope to test point “TP25B1” (+)and chassis ground (-).9. Select group no. “3”, item no. “13” and change datavalue to adjust the waveform “a” (black portion ) tobe maximum amplitude.Black Level(a)PC Offset adjustment