Dual 1211 Service Manual

Fig.
17
Change cycle
Shut-off
mechanism
193
196
197
242
Fig. 18
Fig. 19
214 212
245
Shut—off
and change functions are de—
termined by the position of the cam
follower
lever (245). After every start
or record—drop, the cam follower lever
is brought to its stop position by the
main lever (218) (longer end towards
the center of the main cam).
As the re—
cord is dropped the cam follower lever
(245) is turned to its start position
by the cam rocker (214), so
that the
tonearm can swing in
toward the record
and be lowered on to it. If there are
no more records on the
spindle, and the
cam rocker cannot
turn the cam follower
lever, the lever remains in its stop
position and allows the
tonearm to
swing to its rest
position.
When the
main cam (242)
returns to
its
neutral position, the
switch arm (221)
drops into a cut—out in
the main cam,
opening the
power switch (182)
and
disengaging the drive
idler (133/140).
Symptom
Turntable stops after
automatic
setdown of
the tonearm
Cause
a)
Switch arm
(221) is not
latched
by pawl (234)
b) Power switch opens
Remedy
a) Loosen
screw and turn the
short
arm piece on the
long switch—
arm
piece. Move
the tonearm in
and
turn the main
cam to its
neutral
position and
adjust for
about 1/64"
play between cam
and
rectangular bolts
riveted
into the
chassis.
b) As the
tonearm moves in,
switch
slide (184)
must
overtravel by
about
1/64". Its tab
must en—
gage
the
switch.
Symptom
Last record keeps repeating
Cause
Defective spindle
Remedy
Replace spindle
12

Dual 1211 Specifications

General

Weight	6.5 kg
Speeds	33, 45 RPM
Platter	Aluminum
Wow and Flutter	<0.15%
Drive Type	Idler Wheel Drive