Samsung DVD-E138A/E138B User Manual
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Alignment and AdjustmentSamsung Electronics 2-32-2-2 SKEW Adjustment MethodNeeded to minimize the variations in Skew of the Pickup unit and to provide optimum match with the recordedsignal on the Disc.1) Connect an Oscilloscope to the “ENV” Test Point (See Fig. 2-1).2) Connect Power, Open the Tray and Play the TDV-533 Disc, Chapter 14.◆ Set the Oscilloscope Range as follows :(Voltage ; 50mV/Div., Frequency ; 10m Sec.)3) Adjust the Screws “A” and “B” (See Fig. 2-2) using a Hex screwdirvier until you obtain a Flat Waveform andthe picture is stable.Then, go to Chapter 1 and make sure the Waveform is Flat here as well.If not, you have to go back to Chapter 14 and adjust again.If you cannot obtain a Flat waveform, then the unit is defective.Note : The Deck must be in a horizontal position. Use both “A” and “B” screws to adjust. Typical Waveform before Adjustment Waveform after Correct AdjustmentFig. 2-3 Envelope Waveform |
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