Dual 1229 Q - Change Cycle Malfunctions; Turntable Stops After Setdown Troubleshooting

Fig.22 Change cycle
177
178
179
Fig. 23
Fig.
24
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I
171
173
172 156
207
As the
record is
dropped the cam
follower
lever
(207) is
turned to its
start
position
by the
cam rocker
(173), so that
the tone —
arm can swing
in toward the
record and be
lowered on to it. If
there
are no
more re—
cords 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 rast
position.
When the main
cam (165)
returns to
its neu—
tral
position, the
switch arm (188)
drops
into a
cut—out in the
main cam,
opening the
power
switch
(129) and
disengaging the
drive
idler
(131).
Trouble
Turntable
stops after automatic setdown of
the
tonearm
Cause
a)
Switch arm (188) is not
latched by pawl
(273). Bolt of segment slips over
pawl
instead
of engagin it.
b)
Power switch
opens
c) Square bar not
properly screwed in. Paul
can
escape.
Remedy
a) Adjust
segment (201) so that bolt
catches
pawl in
both positions of
mode selector.
b) By
aligning angle lever
(145) (play bet—
ween angle lever and
slide (140) max.
0.3 mm).
c) Loosen
screw (256). Press pawl
against
square bar (274)
(arrow in Fig. 24) and
fasten screw.
Trouble
Tonearm misses
1/2 inch. record during cy—
cling moving in or out.
Cause
Switch arm maladjusted. Paul touches square
bar.
Remedy
After loosening
screw (189), twist short
part of the switch arm on the long part.
Adjustment is correct, when
the distance
between pawl and square bolt
(274, mounted
on chassis plate) is 0.3 mm after the tone —
arm has moved in and the main cam was turned
manually.
14