Sanyo PLC-XC50 Service Manual

Also see for PLC-XC55: Brochure Owner's manual Manual Manual Specification sheet

Contents

-31-Electrical AdjustmentsPedestal adjustment [Component]1. Enter the service mode.2. Receive the 16-step grey scale 480i-component sig-nal with Computer2 [Component] mode.3. Connect an oscilloscope to test point “TP_G1” (+)and chassis ground (-).4. Select group no. “0”, item no. “0” and change datavalue to adjust the pedestal level and black level to bethe same level.5. Connect an oscilloscope to test point “TP_R1” (+) andchassis ground (-).6. Select item no. “1” and change data value to adjust thepedestal level and black level to be the same level.7. Connect an oscilloscope to test point “TP_B1” (+) andchassis ground (-).8. Select item no. “2” and change data value to adjust thepedestal level and black level to be the same level.Pedestal LebelBlack Lebel1. Enter the service mode.2. Receive the 8 color 100% color bar 480i-componentsignal with Computer2 [Component] mode.3. To start the auto-calibration for Component adjust-ment, select group no. “260”, item no. “0” and thenchange data value from “0” to “1”. After the auto-cali-bration completed, "OK" will appear on the screen.4. Auto Calibration adjustment [Component]Below adjustments are performed when the above autocalibration is failed.Gain adjustment [Component]1. Enter the service mode.2. Receive the 16-step grey scale 480i-component signalwith Computer2 [component] mode.3. Connect an oscilloscope to test point “TP_G1” (+) andchassis ground (-).4. Select group no. “0”, item no. “3” and adjust the ampli-tude “a” to be minimum by changing the Data value.(a)White Level1. Enter the service mode.2. Receive the 16-step grey scale composite video sig-nal with Video mode.3. To start the auto-calibration for Component adjust-ment, select group no. “260”, item no. “0” and thenchange data value from “0” to “1”. After the auto-cali-bration completed, "OK" will appear on the screen.5. Auto Calibration adjustment [Video]Gain adjustment [Video]1. Enter the service mode.2. Receive the 16-step grey scale composite video signalwith Video mode.3. Connect an oscilloscope to test point “TP_G1” (+) andchassis ground (-).4. Select group no. “20”, item no. “0” and adjust the ampli-tude “a” to be minimum by changing the Data value.(a)White Levelbelow adjustment is performed when the above autocalibration is failed.1. Enter the service mode.2. Receive the 50%-Whole Gray computer signal withComputer2 [RGB] mode.3. Select group no. “100”, item no. “92” and changedata value to “2” to reduce the panel frequency.4. Project only green light component to the screen.5. Select group no. “101”, item no. “1” and changedata value to obtain the minimum flicker on thescreen.6. Project only red light component to the screen.7. Select item no. “0” and change data value to obtainthe minimum flicker on the screen.8. Project only blue light component to the screen.9. Select item no. “2 and change data value to obtainthe minimum flicker on the screen.10. Select group no. “100”, item no. “92” and changedata value to “0” to reset the panel frequency.6. Common Center adjustment