Panasonic PT-VX400U Service Manual

Also see for PT-VX400E: Operating instructions Operating instructions

Contents

Panasonic PT-VX400U Service Manual Manual pdf 37 page image

-37-Electrical Adjustments3. Auto calibration adjustment [Component]Input mode Computer 1 (Component)Input signal 480i component signalSignal pattern 8 color bar1. Enter the service mode2. Select Group “260”, No. “0” and set the data valueto “1”.The projector begins auto-calibration and then "OK"will appear on the screen.Below adjustments are performed when the above autocalibration is failed.Gain adjustment [Component]Input mode Computer 1 (Component)Input signal 480i component signalSignal pattern 16-step gray scaleEquipment Oscilloscope1. Enter the service mode.2. Adjust the amplitude “a” of waveform at each test pointto be minimum by changing the data value of Group- No.Group - No. Test Points0 - 3 TP35G(a)White Level4. Auto calibration adjustment [Video]Input mode VideoInput signal Composite video signalSignal pattern 16-step gray scale1. Enter the service mode.2. Select Group “260”, No. “0” and then change data val-ue from “0” to “1”. After the auto-calibration completed,“OK” will appear on the screen.Below adjustment is performed when the above autocalibration is failed.5. Common center adjustmentInput mode Computer 1 (RGB)Input signal XGA computer signalSignal patterns 50% R, G, B whole signals1. Enter the service mode2. Select Group “100”, No. “92” and change the datavalue to “2” to reduce the panel frequency.3. Change data value to obtain the minimum flicker foreach color on the screen.Group - No. Adjustment101 - 1 for green flicker101 - 0 for red flicker101 - 2 for blue flicker4. Select Group “100”, No. “92” and change the datavalue to “0” to reset the panel frequency.Pedestal adjustment [Component]Equipment Oscilloscope1. Enter the service mode.2. Adjust the black level on each test point to be minimumby changing the data value of Group - No.Group - No. Test Points0 - 0 TP35G0 - 1 TP35R0 - 2 TP35BBlack LebelGain adjustment [Vodeo]Equipment Oscilloscope1. Enter the service mode.2. Adjust the amplitude “a” of waveform at each test pointto be minimum by changing the data value of Group- No.Group - No. Test Points20 - 0 TP35G(a)White Level