Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung DVD DVD-E235 SAMSUNG_DVD-E235

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2. Alignment and Adjustment
2-1 Location of Test Point




                             SKEW




                                Fig. 2-1 Location of Test Point




Samsung Electronics                                               2-1
Alignment and Adjustment


2-2 Skew Adjustment
2-2-1 Adjustment Spec. and Test Point
                                                                               Test Disc ; Service not Available

      Test Disc            Adjustment Spec.                          Test Point               Adjustment Location
       TDV-533                                                        "ENV"                         Screw A / B
      Chapter 14             Flat Waveform                 (Main PCB - Component Side)         Ass'y Deck - Top Side
                                                                  (See Fig. 2-1)                   (See Fig. 2-2)




                                              Fig. 2-2 Ass'y Deck (Top Side)




2-2                                                                                                   Samsung Electronics
                                                                                              Alignment and Adjustment


2-2-2 SKEW Adjustment Method

Needed to minimize the variations in Skew of the Pickup unit and to provide optimum match with the recorded
signal 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 and
   the 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 Adjustment
                                             Fig. 2-3 Envelope Waveform




Samsung Electronics                                                                                               2-3



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