Dual 1211 Service Manual

Fig. 13 Stop position
le
( mperz
,,!.\;......_
242 271
272220
225 224262
Fig. 14
Muting switch
221
Av 212
227
-
iintionue:12.»
-
eipe;
265 268
Cam wheel at zero:
Contacts of muting switch opened
Cam
wheel is
turning:
Contacts of muting
switch closed
Moving the
operating switch also
releases the start lever (226),
pulling lt towards the main cam by
means of the tension spring (225).
This causes coil
spring to bring
the shut—off lever (238)
within
range
of the main cam dog. Thus the
shut—off lever drives the main cam.
226
To prevent malfunctioning, the ope—
rating switch is locked during the
start cycle (that is, while the
main cam is turning). Just before
the main cam resches its neutral
position (at the end of the change
207
cycle), the start lever is pushed
clear of
the main cam by the start
pin of the main cam. This restores
208
the
switch lauer and operating
switch to their original positions.
267
After installation and also
after
moving the
changer, the unit should
be
started with the
tonearm locked
on
the rest. This
will automati—
cally re—adjust the
shut—off lever,
which may haue
shifted out of po—
sition.
Manual
start
When the tonearm
(15) is
suung in —
ward by
hand, the paul on
the
switch arm drops into a
support
on the base
plate, holding
the
switch arm in
this position and
the
idler wheel
(133/140) in contact
with the platter.
The slide
(184)
linked
with the switch arm
actuates
the power
switch and
sets the turn—
table
platter rotating.
On
reaching the run—out
groove,
the
tonearm
automatically returns
to its rest position
and the unit
shuts itself off.
(See shut—off
mechanism,
next side).
However, if
the tonearm
is lifted off
the re—
cord manually
and returned to the
rest, the tabs
of the arm
segment
(276) release
the pawl. The
tor—
sion
spring (220) then
returns the
switch
arm to its
initial position,
opening the
power
switch and disen—
gaging
the idler wheel.
Stop switching
When the operating lever
is moved
to "stop",
the starting lever (226)
is pushed forward. As a
result the
shut—off linkage
comes into contact
with the
main cam. The swinging le—
ver (245) remains in its stop po—
sition.
When
the tonearm is on its rest and
the operating lauer is pushed to
"stop",
the operating lever must
not jam.
10

Dual 1211 Specifications

General

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