JVC RC-828L Service Manual page 4

RC-828L/LB |
FULL AUTO STOP MECHANISM Detection Pulley Driving Belt
The model RC-828 is equipped with the full automatic stop
mechanism which functions in any mode, playback, record-
ing, fast forwarding (F.F.) and rewinding, when the tape
has stopped.
The motor is turned on when the control button has been
pressed.The motor rotation is transmitted to the worm gear
through the driving belt, the driving pulley and the worm
wheel. Those
parts are included
inside the
shut-off
assembly.
The gear is always turning while the motor is rotating. In
the playback, recording, and F.F. mode, the take-up disk is
turning to the (A) direction as shown in Fig. 5 and the
rotation is transmitted to the detection pulley by way of the
detection belt. The detection cam that is swung to the (A)
direction as shown in Fig. 7 by the friction of the felt
which is contacted with the detection pulley pushes the
release lever outward. In the rewinding mode, the take-up
disk turns to the (B) direction as shown in Fig. 5. The
detection cam swings to the (B) direction as shown in
Fig. 8 and the release lever is pressed outward. The release
lever does not engage with the pin which is projected from
the worm gear, while the tape is running, so that the auto
stop mechanism does not function.
If the PAUSE button is pressed, the stop lever as shown in
Fig. 5 pushes the release lever not to engage with the pin.
When
the tape stops, in the any mode, the release lever
Detection Cum
moves to the (C) direction as shown in Fig. 10. The
projection (D) of release lever engages with the pin and the
release lever is moved to the (E) direction. The release lever
pushes the kick lever and the kick lever presses the push
button cam to release the lock of buttons so that the
mechanism becomes stop mode.
y¥ Pin
Wornr Gear
Shut-off Ass'y
Worm Gear Pin
<@ Shut-off Ass'y
Release Lever
Motor
A oN
Detection Belt —*\\
Y Pause Bar
\ ee Stop Arm
r Stop Lever
a zs
Shut-off Ass'y
Driving Pulley
Take-up Disk Detection i '"
Belt
Push Button olay.
Fig. 5 Fig. 10
No. 1344