Dual 506 - Cartridge Mounting (1;2 Inch); Anti-Skating Force Adjustment; Tone Arm Lift Operation; Lift Height Adjustment

Fig. 8
Fitting a 1/2
inch
cartridge
If
a cartridge with
1/2 inch standard
mount is to be
fitted, the
conversion
kit 44
Number
262 186
is
necessary. The proper
method of fitting is shown in fig. 8. .
Also the
decorative
cover should be
removed from
the
counterweight 41 and
should be fitted
with the
compensatory
weight to be
found in
the
conversion kit
44.
Anti-Skating
Device
To adjust the
anti-skating force, operate the
pointer
scale provi-
ded on the cover 62. Depending on this
adjustment, the non-
symmetric cam disk will guide the skating lever 207 out of the
tone arm pivot point. The
anti-skating force is transferred by the
tension spring 214 to the
segment 211 and, hence, to the
tone arm
40.
The factory adjustment is optimal for any stylus having a spheri-
cal tip radius of 15 Um or an elliptical tip radius 5/6 by 18/2211m.
These factory-adjusted vylues may be varied only in an
authori-
zed Dual service workshop using a Dual Skate -0 -Meter and a test
record.
Tone
Arm Lift
Move the lift
control bar 219 to the front
( V
)
or
LIFT posi-
tion;
this
will
rotate the lift cam 223 and
operate
the setting
bar 194 and the lifting bolt that will lift the tone arm. In
this
way the
tone arm
can be lifted
from
or
lowered on
any point of
the record except
in the shut-off range.
Move
the
bar 219
to the
rear
(
1) or
LOWER position;
this will
release the setting bar 176. The pressure spring
184wi11 return
the lifting bolt 185 to its operating position and the tone arm 50
will be loweredsofly, braked by the silicone oil in the lifter tube.
To Adjust the Lift
Height
Slightly rotate the adjusting
sleeve 181. The stylus should be
lifted from
the record by 5 to 7
mm.
To Replace the Lift Plato
1. Fasten the record player in the service jig and lock lt in place.
2. Adjust record player to
head position.
3. Detach the tension spring 226 from the bearing bracket,
224. Rotate bearing part 195 through 90 0 degrees and re-
move it. Remove
the setting bar 194.
4. Detach the tension spring 214, slaken the lock washer 217
and
remove the skating lever
207.
5. Remove lock washer 217 and disk 216. Detach shut-off bar
215
from segment
211.
6. Slacken hex. nuts 213 .and screw 204. Remove counter
bearing
205 and segment 211. Remove lock washer 188 and
disc 187,
disengage pawl 186.
7. Remove screw 183,
and remove lift plate assy. 182.
To replace
the
lift plate 182, proveed in reversed
sequence, but
look for proper
Adjustments
(described below) when you fix the
segment 211.
Starting and Shutting Off
Swinging-in
of the tone arm 40 causes rotation of segment 211.
As a result, pawl 164 and shift arm 172 will operate the power
switch 143 causing the motor 123 and turntable 7 to rotate.
After the record has been
played, the dog M of the turntable
(Fig. 11 b) will operate the shut-off lever 34. During play-back,
the shut-off bar
215 is dragged in proportion to the motion of
segment 211. For records 116 to 122 mm in diameter, the
shut-off lever 34 is
gradually pushed to
dog M by the shut-off
bar
215 in
the
shut-off range, see Fig. 10.
When the dog M con-
tacts the shut-off lever A, the c,arrier 37
will move the shift arm
172 to its zero
position and
the power switch
will
interrupt the
supply.
At the
same time
the lift
bar 218
coupled to
the shift arm
172 will operate
the tone arm lift and the tone arm 40
will
be
lifted.
1
I 1 1
Fig. 9
Fig.
10
5