Samsung DVD-CM420 Service Manual

Also see for CHT-420: Instruction manual Service manual Instruction manual Manual de instrucciones

2-6Alignment and AdjustmentsSamsung Electronics2-2-2(b) SKEW Adjustment MethodNeeded to minimize the variations in Skew of the Pick-up unit and to provide optimum match with the recordedsignal on the Disc.1) Remove the Ass’y Deck.Place the Ass’y Deck on a flat horizontal position.2) Connect an Oscilloscope to the “ENV” Test Point. (See Fig. 2-5)◆ Set the Oscilloscope Range as follows :(Voltage ; 50mV/Div., Frequency ; 10m Sec.)3) Connect Power, Open the Tray and Play the TDV-533 Disc, Chapter 14.4) Adjust the Screws “A” and “B” (See Fig. 2-6) using a Hex screwdrvier 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, but mostly “A”. Typical Waveform before Adjustment Waveform after Correct AdjustmentFig. 2-7 Envelope WaveformAll manuals and user guides at all-guides.com