Dual 721 - Starting

8. Remove compensating cam
(226) and com—
pression spring (225).
9. Undo pin (214). Turn bush (207)
to " ".
Remove cue control plate
(210) from cam
(223). The turn until the
bush (207) fits
the recess of
the mounting plate
(128) so
that the cue control plate (210)
can be
removed.
For installation proceed in
reverse order.
Adjustment points
a) Disconnect unit
plug from power line
(mains). Move
lever (74) to
"start" po—
sition. Rotate platter (4)
until the to—
nearm has reached its
highest position.
The
distance between the lower edge
of
the pick —up head (27)
and the rest (41)
should be
approximately 3 mm. Adjust
by
turning bush
(206) (Fig. 17).
b)
Disconnect unit
plug from power
line.
Lock
tonearm (50). Move
lever (74) to
"start" position.
Rotate
platter (4) and
observe shaft
pin (235) of the
coupling
plate (233). The
guide lauer
(235) on the
main lever
(156) should
just tauch
the
shaft pin
or just move
lt by 0.1 mm
(ad—
justable by setting
machine screw
(158)
(Fig.
18).
Starting
Change lever (174) is
rotated when the left
control lever is turned
to "start". This
results in the following function
being ini—
tiated.
The control arm (170) connected to change
lever (174) operates
the power switch which
starts the motor (5) rotating. Simultaneous—
ly, pawl coupled to the change
lever (178)
by a tension spring engages
and retains lt
in this
position.
The change lever
(178) presses the shut—off
lever (142)
toward the dogs on the
motor
pinion and thus causes the camwheel (144)
to rotate. The pawl
then moves - deflection
lever (139) into
starting position.
After fitment and each time
after transport
the unit should be started once with the
to—
nearm locked for
automatic adjustment of the
mechanical gear.
Adjustment points:
a)
Place unit upside
down.
Disconnect power
line plug until
detent (164) is
secured.
Slightly
move cam (144) out
of position.
The
play between
the detent
(164) and pin
(8)
should be about
0.3 mm (see Fig.
21),
Correct
setting by
bending switch arm
section (LS).
b)
Disconnect
unit plug
from power
line.
Place unit
upside down.
Operate control
lever
(74).
Rotate motor.
The power
switch
(106)
should operate
shortly be—
fore the
change lever
(178) catches. Ad—
justment
should be made by
turning
eccentric
pulley "E".
c) Tonearm
(50) should lauer
the stylus
exactly
on the lead—in
groove. The ad—
justment
screw is accessible
through the
hole between
control lever (74)
and the
cue control.
The adjustment
screw should
be
either turned
clockwise or
counter—
clockwise.
Fig.
17
3mm
Fig.
18
1
154 129 158 157 159 233 235
153 152 156
230
215
d) The
change lever (174)
should bring de—
flection
lever (139) into the
start po—
sition.
Adjustment
can be made by
slight bending
of change lauer
section (U).
Fig. 19
Starting
15