Sharp VC-90ET Service Manual page 4

Full erase head ass'y Kis
Supply pole base ass'y(2)
" V¥C-90ET
FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW)
Take-up pole base ass'y 21)
Drum ass'y
Tension arm assy (3)
Brake shifter (4)
Back tension lever (5)
Supply reel disk (6)
Main supply brake lever &
Full erase head ass'y ;
Erase the whole records on the tape in the
recording mode.
Tension arm ass'y
Detects the tension of tape while running, and
brakes
the supply reel disk via the tension bane.
Brake shifter
Set the position of brake or the like in accordance
with the modes such as stop and playback.
Back tension lever.
Back tension lever
Bakes the supply reel disk to a certain degree to
prevent tape slackening during "loading" and
"shifting from playback to video search rewind".
Main supply brake
Brakes the supply reel disk to prevent tape
slackening when the unit is stopped in fast forward
or rewind mode.
Main take-up brake
Brakes the take-up reel disk to prevent tape
slackening when the unit is stopped in fast forward
or rewind mode.
Half-loading level
Bring the tape in contact with the A/C head,
putting it in half-loading state in the fast forward
orrewind mode.
Video search brake lever
It is in contact with the take-up reel disk normally,
and brakes it to a certain degree. It applies larger
brake in the video search rewind mode.
24) V.H Cleaner arm ass'y
20) A/C head ass'y (19) Cam switch
(25) Solenoid ass'y (23) Dew sensor
fo] 2
(18) Loading motor
9
eYay a
=
;
(14) Capstan D.D.motor
©) 3 (13) Reverse guide
(12) Take-up reel disk
(10) Half-loading lever
(9) Main take-up brake lever
(8) Idler gear ass'y
Reverse guide
Pulls out the tape in the video search rewind mode,
and controls the tape drive train height with the
upper and lower guides.
Relay shifter lever
Transmits the operation of the master cam to the
brake shifter, and operates the reverse guide.
Pinch roller lever ass'y
Press-fits the tape to the capstan during tape
running. The right protrusion switches the clutch
of the cassette housing control assembly in " tape
eject", and makes the mechanism eject the tape.
Master cam
Turns clockwise during loading, and
counterclockwise during unloading, and moves the
shifter or the like in accordance with each mode.
Loading motor
A motive power which drives the mechanism. It
transmits the power to the master cam and
cassette housing control assembly via the belt.
Cam switch
Rotates synchronously with the master cam, and
detects the position of each mode by means of the
internal switch.
Dew sensor
Detects the generation of dew in the set. It stops
the mechanical action of the set when finding any
dew in the set.