Sharp VL-PD1U

VL-PDI U
7-6. Checking of supply S reel base no-load torque
(l)Remove the cassette controller assembly, then apply
DC3V to the loading motor and put the system into L.
start mode (refer to 9-l).
(2)Move the swing arm toward the Tu reel base side.
Be careful not to prevent damage to the gears and other
parts all this while. (Fig.6)
(3)Set a back tension measurement reel hub on the S reel
base.
(4)Using a dial tension gauge, pull the string in the A
direction, then confirm that the tension is within the
standard.
FF back tension standard
20mN or less (2.0gf or less)
(If the tension fluctuates, read its center value.)
Fig. 6. S reel base no-load torque measurement
method
7-7. Checking of loading back tension
(l)Remove the cassette controller assembly, then apply DC3V to the loading motor and put the system into L. start mode.
(refer to 9-1)
(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. (Fig.7)
(3)Set a back tension measurement reel hub on the Tu reel base.
(4)Using a dial tension gauge, pull the string in the A direction, then confirm that the tension is within the standard.
REW back tension standard
lSfi:rnN (l+.;gf)
(If the tension fluctuates, read its center value.)
7-8. Checking of winding Tu reel base ratchet
torque
(l)Remove the cassette controller assembly, then apply
DC3V to the loading motor and put the system into
standby 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. (Fig.8)
(3)Set a back tension measurement reel hub on the Tu reel
base.
(4)Using a dial tension gauge, pull the string in the A
direction, then confirm that the tension is within the
standard.
(If the tension fluctuates, read its center value.)
Winding Tu reel base ratchet torque standard
90mN or less (9gf or less )
Move the swing arm
toward the S reel
base side.
Fig. 7. Loading back tension measurement
method
7-4