Samsung VP-L900, Training Manual

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Circuit Operating Description
Samsung Electronics 6-21
6-2-2 Drum servo
(1) Drum speed control
The Drum the Speed Control controls in order to maintain the FG quantity. The Drum Speed measures the
period of the D.FG signal which becomes the input in 103 pin of the micom with becomes the detect. The
speed detect accomplishes 30 degrees in drum rptate angle. The FG quantity which it follows in the MODE
refers the lower part contents.
SP LP
SPEED DRUM FG fv REMARKS SPEED DRUM FG fv REMARKS
-19 334.1775 REW -19
-15 338.9787 -15
-9 346.4422 -9 352.9303
-7 349.0037 58.167 RPS -7 354.2521 59.040 RPS
-1 356.9206 59.487 EDIT- -1 358.2777 59.713 EDIT-
0 358.2751 59.713 STILL 0 358.9576 59.826 STILL
1 359.64 59.94 PLAY 1 359.64 59.94 PLAY
5 365.205 60.868 5 362.3959 60.400
7 368.0526 61.342 7 363.7897 60.633
9 370.9450 61.824 FPS 9 365.1943 60.868 FPS
15 379.9014 15 369.4739
19 386.1167 FF 19
<Table 6-10 NTSC>
SP LP
SPEED DRUM FG fv REMARKS SPEED DRUM FG fv REMARKS
-15 272.133 45.3555 REW -15
-9 281.955 46.9925 -9
-7 285.387 47.5645 RPS -7 292.512 48.752 RPS
-5 288.906 48.151 -5 294.348 49.058
-1 296.208 49.368 EDIT- -1 298.092 49.682 EDIT-
0 298.092 49.682 STILL 0 299.042 49.8403 STILL
1 300.000 50 PLAY 1 300 50 PLAY
5 307.882 51.3137 5 303.889 50.6482
7 311.979 51.9965 7 305.873 50.9788
9 316.189 52.6982 FPS 9 307.881 51.3135 FPS
15 329.525 54.9208 FF 15
<Table 6-11 PAL>