Alignment and Adjustment
Samsung Electronics
2-3
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
Summary of Contents for DVD-E138A/E138B
Page 2: ...Schematic Diagrams 6 2 Samsung Electronics 6 1 Power VAL5V VAL5V ...
Page 3: ...Schematic Diagrams Samsung Electronics 6 3 6 2 A V Decoder Main Micom ...
Page 4: ...Schematic Diagrams 6 4 Samsung Electronics 6 3 Servo ...
Page 5: ...Schematic Diagrams Samsung Electronics 6 5 6 4 Front Micom VFD Display Key ...
Page 6: ...Schematic Diagrams 6 6 Samsung Electronics 6 5 Video ...
Page 7: ...Schematic Diagrams Samsung Electronics 6 7 6 6 Audio Only for DVD E138A E138B E238 ...
Page 8: ...Schematic Diagrams 6 8 Samsung Electronics 6 7 Audio Only for DVD E338K ...
Page 9: ...Schematic Diagrams Samsung Electronics 6 9 6 8 Karaoke Only for DVD E338K ...
Page 10: ...Schematic Diagrams 6 10 Samsung Electronics 6 9 Karaoke Sub Only for DVD E338K ...
Page 11: ...Schematic Diagrams Samsung Electronics 6 11 6 10 Key Only for DVD E338K ...
