VL-PDl U
7-9. Checking of rewinding playback(VS-REW) back
tension
(1) Remove the cassette controller assembly, then apply DC3V to
the loading motor and put the system into rewinding playback
(VS-REW) mode. (refer to 9-l)
(2)Move the swing arm toward the S reel base side.
Be careful not to prevent damage to the gears and other parts
all this while.
(3)Set a torque gauge on the Tu reel base.
(4)Turning the torque gauge to counterclockwise
seconds), then confarm that the torque is within
(If the tension fluctuates, read its center value.)
(1 turn for 3
the standard.
Rewinding playback (VS-REW) back tension standard value
0.70 + 0.35mN*m (7.0 + 3Sgfcm)
Fig. 8. Winding Tu reel base ratchet torque
measurement method
7-lO.Checking of pinch pressing force
(l)Set the pinch roller pressing force measuring thread on the pinch lever (position A , Fig. 9).
(2)Set the mechanism to the playback.mode, press the pinch roller against the capstan axis.
(3)Fit the tension gauge to the pinch roller pressing force measuring thread, pull in the arrow B direction shown in Fig. 11
to separate a little the pinch roller from the capstan axis.
(4)Gradually return the pinch roller, and when the pinch roller contacts parallel the capstan axis, read the value (see Fig.
10) to make sure that the value conforms to the standard shown below.
<Standard>
1.8 + 0.3N (180 + 30gf)
<Caution>
After making this measurement, quickly release the system from playback mode and remove the pinch roller from the
capstan shaft. (If the pinch roller is left fitted onto the capstan shaft for a long time, the pinch roller will be deformed.)
A-
Fig. 9.
OK
NG
Fig. 10.
Fig. 11.
7-5
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