Dual 522 - Turntable Operation Modes; Starting Sequence; Manual and Continuous Play; Muting Switch and Shut-off

After the
tonearm has been set down on the record, the setting
bar 204 is
released and returns to its normal position, thus esca-
ping
from the range of the spring pin. The tonearm is thus free to
move in horizontal
direction during the play-back.
The Starting
Sequence
When you adjust the
START/STOP lever to the START position,
the turn-on lever 207 is rotated
to the outside and will trigger
the
following
functions:
a) The turn-on lever 207
rotates the shift links 189 seated on the
riffled pins 183.
At the same time, the power switch is turned
on 135 and both the motor 130
and turntable start rotating.
b) The shift link
189 enters the range of the reversing lever
vvhich
is forced
into
its
start
position
by the subsequent
rotation
of
the cam
wheel 161.
c)
Operation
of
the START/STOP
lever 50 will also
release the
start angle 187 that is pulled towards
the cam wheel by the
tension spring 188. The
shut-off lever is thus brought into the
range of
dog M on
the
turntable pinion (PR)
and
the cam
wheel is driven.
Manual Start
When the
tonearm
is guided
towards the record
manually, the
pawl 236 coupled to the shift arm 165 will engage
with the
square bolt mounted in the
deck plate and will keep the shift
arm
in this
position. Coupled to the shift
arm is the shut-off lever
168 that
will turn on the
power switch and thus initiate
the turn-
table
rotation. When
the run-out groove of the record played has
been
reached, the tonearm is
restored and the record player
is
turned off by automatic
means. If you lift the
tonearm before
the end
of play
and
put it back onto its
support, the bolt of seg-
ment
200 will release
the engaged position of the
pawl 236 so
that
the
shift arm is
returned
to its initial position and the power
switch will
tum off.
Continuous Play
This mode is
operative when you have
adjusted the knob 66 to
co . The knob 66
will rotate the reversing angle
231 and the latter
is
forced into the starting
postion by the turn-on
lever 207 at the
end of
record, the
tonearm
is restored to its rest position
on the
support near
the
record
rim. This procedure will be repeated unti I
the
START/STOP lever 50 is
adjusted to STOP or the knob
66 is
adjusted to
no. 1
position.
Muting
Switch
The
muting
switch is provided to avoid
noisy lifting and
lowering
of
the tonearm in the auto
made. The contact springs of
both
channels
are controlled by the cam
wheel. The resulting short-cir-
cuiting of the
pickup leads is ineffective in the rest
state of the
record player.
Adjustment
In the zero
position of the cam
wheel,
a contact
separation
of
about 0.5 mm should exist
between the contact
springs
(F) and
the shorting
straps (L) in
Fig. 14. If
necessary, bend the
shorting
straps. Maintain
contact springs in good state
by a
spraying
agent.
Final Shutting-off
The
shutting-off and
stop functions
are
controlled by the
reversing
lever U. Lever U is
brought
into
the
stop
position
by
the main
lever
177 (longer
leg of the
reversing lever
towards the cam
wheel
center). The
shut-off bar 179 is
dragged
during
the play in
propor-
tion to the
motion of
segment 200.
The
shutting-off Operation
after the end of record is triggered by
the dog
(M)
of
the
turntable
7 and by
the
shut-off lever
(A).
Fig.
12
Fig.
13
231 225 204
Fig. 14
191 207
186
204 179
6