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o> Gar 4=)
e ATSC Operation
(1) Loading of a tape cassette causes an arm unit to
turn, which causes the load switch to turn ON.
With the load switch ON, a motor runs to cause all
gears other than FF/REW idler gears to mesh and
forward
and
reverse
idler gears
rotate
in the
respective play direction. Now the ATSC state is
obtained (Figs. 8 and 9).
ARM UNIT
al
Fig. 8
¢ Sensing Operation
(1) Sensing arm (felt) and torque limiter bush are held
together by means of a sensing arm spring.
The felt slides with the torque limiter bush side to
keep Point A as a fulcrum at all times while the
sensing arm moves along a cam of sensing cam
gear because the arm tries to turn counterclock-
wise. (Fig. 10)
the torque limiter bush stops rotation at ATSC or
tape end, and a pin of sensing
arm
is pushed
toward the outermost side by the sensing cam
gear.
Frictional force between the felt and bush helps the
sensing arm holding its position. (Fig. 11)
(2
—
FF/REW IDLER GEAR
/
REEL GEAR
FWD IDLER GEAR
TORQUE LIMITER
LARGE GEAR
TORQUE LIMITER
es
SMALL GEAR
ae
LIMITER
sie
IDLER GEAR
REEL GEAR
REV {DLER GEAR
PLAY IDLER GEAR
IDLER GEAR
Fig. 9
{3) When the sensing cam gear is turned further, with
the sensing arm held in a state shown in Fig. 11,
the sensing arm pin is caught by a hook of the cam
gear. (Fig. 12)
(4) The sensing cam gear turns further from the state
shown in Fig. 12, and the sensing arm moves to
turn ON the sensing switch. (Fig. 13)
(5) With the sensing switch ON, the sensing cam gear
turns further to release the sensing arm pin from
the hook.
The pin returns to an original position under a force
of the sensing arm spring. (Fig. 14)
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