Panasonic TX-28MD4 Service Manual

Also see for TX-21MD4: Service schematics Operating instructions Service manual

Contents

ALIGNMENT SETTINGS(The figures below are nominal and used for representative purposes only.)Alignment Function Settings / Special featuresHorizontal Position H-Pos061 Optimum setting.Vertical Position V-Pos005 Optimum setting.Horizontal Amplitude H-Amp055 Optimum setting.Vert. Amplitude V-Amp054 Optimum setting.EW-amplitude E/W-Amp1-128 Optimum setting.EW-amplitude E/W-Amp2006 Optimum setting.Trapezium-comp Trapez-1047 Optimum setting.Trapezium-comp Trapez-2-128 Optimum setting.Vertical Linearity V-Lin006 Optimum setting.Vertical Symmetry V-Sym002 Optimum setting.DVCO DVCO-005Receive a PAL Colour Bar Pattern. ForDVCO alignment press "Blue" button, waituntil the colours are changing slowly andpress "STR".Cut-off DC Cut-off0171Ug2 TestUg2055O.K.To adjust Cutoff connect an oscilloscope tothe blue cathode, adjust "cutoff" valueusing the "Yellow" and "Blue" buttons untilthe black level is 160V±5V press "STR" tostore the value. Remove the oscilloscope.Select Ug2 adjustment and adjust thescreen VR until the display shows "O.K."HighlightLowlightHigh 0902 0777 0864Low 0117 0132 0112 Optimum setting.Sub-Brightness Sub-Brightness255 Optimum setting.8Black Level160V±5VGND