Dual 522 - Stop Circuit Operation; Stop Circuit Mechanism; Tone Arm Adjustments; Set-down and Shut-off Points

In the shut-off
range for records 116 — 122 mm in diameter, the
shut-off lever (A) approaches
the dog under control of the shut-
off bar 179. The dog IM)
engages with lever (A), which will displa-
ce the cam wheel 161 from
its zero position and make lt
engage
with the pinion (PR) The main
lever 177 returns the
tonearm
that can then
lower itself on its
support.
When
the cam wheel runs
up to its
zero-engagement position, the
nose 186 of
the shift arm can run
into the recess left in
the cam
wheel
and operate
the power
switch 135.
Stop
Circuit
Wen
you
adjust the
lever 50 to STOP, the start
angle 187 is
released and
pulled towards the cam wheel by
tension spring 188.
As a result,
the shut-off lever is brought within the
range of the
dog
(M) on the pinion (PR) of the
turntable and the cam wheel
161 becomes driven.
The reversing lever
remains in its stop
position.
Adjustments
Tone Arm Set -down Point
Slightly
prey up the
nameplate „Dual" at its
lower left corner
and swivel it outwards
(Fig.
161. The now
accessible opening
will
show one of the
adjusting screws.
Set -down Point
for 30 -cm Records
Adjust the
speed selector
20 to the "45"
position and
correct
adjustment with a
screwdriver. If
the stylus sets
down too fa .
r
on the
record inside, rotate the
adjusting screw
clockwise. If the
stylus is lowered
outside the 30
cm-record, rotate the screw
counter-clockwise.
Set -down Point for 17
-cm Records
Adjust the
speed selector 20 to the "33"
position
and rotate
the
screw as above described for adjustment.
Shut-off Point
In the
shutting-off range
for records 116 —
122 mm in
diameter,
the excenter IS) on
segment 200 can
be used to vary the
shut-
off
point.
Tone Arm Lift
Height
This
height of the auto mode can be adjusted with the aid of
the setting sleeve 197. Pull
the mains plug. Disengage the tone
arm.
Rotate the cam wheel 161
out of its zero
position
until
the tone arm has reached its greatest lift height.
The
height
above
the tone arm support stop
should be about
8 mm as shown in Fig. 18. If necessary, rotate the setting
sleeve
197 clockwise or
anticlockwise as required.
Fig.
15
Fig. 16
Fig. 17
Fig.
18
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