Sanyo PLC-EF12N Service Manual

Also see for PLC-EF12B: Owner's manual

-31-1. Receive the 16-step gray scale computer signal.2. Set to COMPUTER mode.3. Connect an oscilloscope to test point “TP581” (+) andchassis ground (-).4. Enter to the service mode, Select data no. “004” andchange data value to adjust “a” to be 0.5 ±0.1Vp-p.5. Select data no. “003” and change data value to adjust“b” to be 10.0 ±0.1Vp-p.(a) (b)PSIG ADJUSTMENTElectrical AdjustmentsPresetting1. Receive the 16-step grey scale computer signal.2. Set to COMPUTER mode.[R-PEDESTAL ADJUSTMENT-1]3. Connect an oscilloscope to test point “TP501” (+) andchassis ground (-).4. Enter to the service mode, select data no. “005” andchange data value as the pedestal and black levelbecome the same level.[G-PEDESTAL ADJUSTMENT-1]5. Connect an oscilloscope to test point “TP531” (+) andchassis ground (-).6. Select data no. “007” and change data value as thepedestal and black level become the same level.[B-PEDESTAL ADJUSTMENT-1]7. Connect an oscilloscope to test point “TP561” (+) andchassis ground (-).8. Select data no. “009” and change data value as thepedestal and black level become the same level.Pedestal level = Black levelPEDESTAL ADJUSTMENT-[CG]1. Receive the 16-step gray scale computer signal.2. Set to COMPUTER mode.[R-OFFSET ADJUSTMENT]3. Connect an oscilloscope to test point “TP501” (+) andchassis ground (-), “TP1501” (+) and chassis ground(-).4. Enter to the service mode, select data no. “17A” andchange data value as both of waveforms become thesame amplitude.[G-OFFSET ADJUSTMENT]5. Connect an oscilloscope to test point “TP531” (+) andchassis ground (-), “TP1531” (+) and chassis ground(-).6. Select data no. “17B” and change data value as bothof waveforms become the same amplitude.[B-OFFSET ADJUSTMENT]7. Connect an oscilloscope to test point “TP561” (+) andchassis ground (-), “TP1561” (+) and chassis ground(-).8. Select data no. “17C” and change data value as bothof waveforms become the same amplitude.OFFSET ADJUSTMENT-[CG]Waveform-A Waveform-B