Dual 1226 - Tonearm Guide Mechanism; Tonearm Lift

Fig. 10 Tonearm guide mechanism
i ae
174 177 45 A 161 187 173 203 219 237
Tonearm Lift
The tonearm lift permits the tonearm to be
set down on the record safely at any desi-
red point outside the shut-off area.
Moving the tonearm lift handle (49) for-
ward causes lift cam (227) to rotate. This
movement is transmitted via positioning
slide (219) to the lift pin which then
raises the tonearm,
Fig. 11 Tonearm lift (tonearm raised)
Tonearm Guide Mechanism
A guide groove located on the underside of
the main cam (161) controls the automatic
lift and set-down of the tonearm as the
cam rotates through 3609, Tonearm lift and
lowering
are
controlled
by
main
lever
(173)
and lift screw (241). Horizontal movements
are
controlled
by
the
main
lever
(173)
with
segment (237).
Automatic tonearm set-down is designed for
12" and 7" records and is coupled to the
platter
speed
selector.
Set-down
points
are
determined
by
the
spring
pin
of
segment
ee
contacting
the
positioning
slide
(219)
which
is
only
raised
by
the
main
le-
ver
(173)
during
the
change
cycle
and
thus
moves
within
reach
of
the
spring
pin
fit-
ted
on
the
segment.
On
completion
of
set-—
down
or
change
cycle
(tonearm
sets
down
on
the
record)
the
positioning
slide
(219)
is
released
again
and
returns
to
its
normal
po-
sition.
It
thus
moves
out
of
reach
of
the
spring
pin
permitting
the
tonearm
to
move
horizontally
without
hindrance
while
pla-
ying
the
record.
After moving the tonearm (by hand) to the
desired spot on the record the tonearm
lift handle is tapped lightly (to the rear)
to release the mechanism,
The positioning slide (219) is thus relea-
sed and the tonearm descends slowly, con-
trolled by the viscosity damped lift pin.
The height of the stylus above the record
can be varied from zero to 6 mm by turning
adjuster screw (48). Turning to the right
increases the height, turning to the left
reduces the height.
227 49 219
216 48 241 237