Dual 721 - Manual Start; Stopping; Muli Ng Switch; Continuous Play

Manual
Start
The detent (164)
coupled to control arm
(170) engages
the pin in the chassis when
the
tonearm is moved inwards by
hand and re—
tains the tonearm in this
position (Fig. 21).
The power
switch is operated by the
control
arm and thus
the platter starts to rotate.
After
reaching the run out groove of the
played record return of the tonearm and
shut—off of the unit take place
automatical—
ly. If, on the other, the tonearm is
lifted
off the record before playing is
completed
and is moved onto the rest by
hand, the pin
of the
segment disengages the detent (164)
so that the control arm is returned to its
starting position. As a result, the power
switch shuts off the power supply.
Adjustment point
Extract power plug. Turn unit
upside down.
Move tonearm
inwards. Power switch should
switch
safely. Correct adjustment
by bending
control arm (0.
Stopping
When control lever (74) is set
to "stop" po—
sition the change lauer (174) is turned an—
ti—clockwise. The deflection lauer (139) re—
mains in its stop position.
Muting
switch
To prevent disturbing noises
during automa—
tic
operation of the tonearm the unit is
fitted with
a muting
switch.
Control of the
switch springs for both
channels is effected
by the camwheel.
With the unit in neutral
state the short circuit of the pick —up
leads
is eliminated.
Adjustment
point
In
neutral position the
distance between
contact
springs should be about
0.3 mm.
Correct by
slightly bending contact
springs.
Continuous
automatic play
The continuous automatic play
is operated
by turning knob (72) to "00". Switch bracked
(242) is actuated by knob
(72). Switch rod
(241) keeps change lever
(174) in start po—
sition. After playing the record
the tone—
Fig. 20
Muting
Switch
arm returns
automatically to
the lead—in
groove of the
record. The
record will
be
played again.
This procedure
will be
repeated
until cancelled
by pushing
control lauer
(74)
to "stop"
or turning
knob (72) to
po—
sition "1".
Adjustment
point:
Bring
turning knob
(72) to
"00" position.
The
play
between the
eccentric pulley
(E)
and
change lauer
(174)
should be 0.1
to
0.3
mm. Adjust by
bending the
switch rod
(241)
(Fig.
19).
Fig.
21
170
164
Defect
Tonearm
head not parallel
to platter.
Cause
Seat of tonearm
head on the
tonearm tube
has
changed during
transit.
Remedy
Remove
platter. Insert
screwdriver
through
the hole
in the chassis
mounting
plate.
Align
tonearm head
and
retighten screw
(Fig.
22).
Fig.
22
16