Dual 601 - Starting; Manual Start; Short Circuiter; Continuous Play

Snarting
Change lever
(45) is
rotated clockwise
when the
left hand
control lever (189)
is
operated.
This results in
the following
functions boing initiated:
a)
Change
lever (189)
rotates the shift
arm
(163) mounted
on groove pin
(198).
Simultaneously the
power switch is
oper—
ated by the
shut—off
lever (165) cou—
pled to the
shift arm
(163). Thus start—
ing
the motor and
platter
rotating.
b) The change lever
(189) is moved within
reach of cam follower lever (173) so
that the latter is forced into "Start"
position after rotation of
the main cam.
Moving the control arm (138) also re—
leases the start lever (203) which
is
pulled towards the
main cam by means of
tension spring
(204). As a result, the
shut—off lauer (170) is
moved within the
range
of the dogs on the platter
pinion
thus driving the
main cam. The change be—
vor is also
locked. To prevent malfunc—
tions the
operating switch is locked
in
position
during the start cycle
(rota—
tion of the main
cam). Just before the
main cam resches
neutral position (at
the end of the change
cycle) the start
lever
(203) is pushed
clear by the main
cam. As a
result, the operating
switch
and change
lever are returned
to their
original
positions. After fitment and
each time after
transport the unit
should
be started once
with tonearm secured on
its
rest. This will
automatically
read—
just the shut—off
lever which may have
shifted out of position.
c)
Manual
Start
The pawl
(185) coupled to
control arm (163)
engages behind the square end attached to
the chassis when the tonearm is moved in—
wards by
hand and retains the control arm
in
this position.
The power switch is operated by the shut—
off lever (165) coupled to the control arm
and thus the motor and platter starte to
rotate. After reaching the run—out groove
of the record return of the tonearm and
shut—off of the unit take place
automati—
cally.
If, on the other hand, the tonearm is lif—
ted
off the record before playing is com—
pleted and is moved onto the rast by
hand,
the pin of the segment (258)
disengages the
pawl (185)
so that the
control arm
is re—
turned to
its starting
position. As
a re—
sult, the power switch shuts off the power
supply.
Short
Circuiter
To prevent disturbing noises during automa—
tic operation of the tonearm the unit is
fitted with a short circuiter. Control of
the switch springe for both
channels is ef—
fected by the camwheel.
With the unit in
neutral
stete
the short
circuit of the pick —
up bade is eliminated.
Continuous Play
Continuous automatic repeat is operated by
turning knob 49 " to DO" position. By turn—
ing the knob 46 the changeover piece
(233) is actuated thus mobing the change
lever (18.9)
and forcing the cam follower
lever (173) to
the START position.
After playing a record the tonearm is moved
back and set down on the run—in groove of
the record. The tonearm will repeat the re—
cord until switched back to the single—play
mode
(46) turned to "1" position) or until
the operating layer (45) is turned to
"STOP".
Fig.
17
256
246 230
231
189
254 255
Fig.
18 Short Cicuiter
243
144
Cam
wheel at zero,:
Contacts of muting switch opened
Cam
wheel is
turning:
Contacts of muting switch is closed
161
133
163
165
11