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13. MECHANISM
DESCRIPTION
The mechanical portion of the DC-200Z (201Z)
uses
separate
power
assist mechanisms
for the
PLAY
and REC system for light-touch operation.
A mechanical
auto-stop function is also built-in.
STOP Mode
Fig. 13-1 shows the PLAY and REC power assist
mechanisms in the stop mode. In this status, the
cam
gear stopper A is making contact with gear
lever A, so the cam gear and capstan gear (flywheel)
are not meshed. (When the power switch is ON, the
motor continues rotating, driving the capstan gear
via the belt).
PLAY Operating (Fig. 13-2, 13-3)
1. When the PLAY
button is pressed down, the
shape of the button forces gear lever A in the
direction.
Also, at the same time, gear
lever B travels in the
direction, and gear
lever A and cam gear stopper A are disengaged.
2.
The cam gear is forced in the direction
by
'the
trigger spring. Consequently,
it starts ro-
tating in the direction (2) (CCW) and meshes
with the capstan gear (flywheel).
Capstan gear
(Flywheel)
TU (take-up) reel base
one
+ )
Gear lever R
Pause lever
Fig. 13-1
48
3.
(+
As
the
capstan
gear
and
cam
gear are now
engaged,
the force transmitted
by the motor
and flywheel rotate the cam gear further, until
stopper C makes contact with gear lever B.
It stops in that position. At this point, the
capstan
gear
and
cam
gear
are
no
longer
meshed. (See right side of Fig. 13-2).
Now, the projection on the cam gear boss is
forcing the brake-plate down in the direction
, and braking force is released from the
reel base.
Also, the cam shape of the cam gear is moving
the action lever in the
direction.
The
head
base is lifted by the action of this
action lever, placing it in the PLAY
position
and throwing the PLAY
switch to the PLAY
side. (See Fig. 13-3). This action also presses
down
on the pinch roller pressure spring caus-
ing pressure contact between the pinch roller
and capstan, and starting tape travel.
At the same
time, the TU
(take-up)
idler is
forced up into contact with the take-up reel
base to start it rotating, and the PLAY mode
is entered.
Cam gear
Stopper B.
Supply ree! base
Stopper C
) Stopper A
ip
4
(Side A)
cam shape
(Side B)
Stopper A
Gear jiever A
PLAY button
Gear lever B
Mechanism in STOP mode (Rear View)
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