Starting And Shut-Off - Dual 704 Service Manual

Starting and shut off
Fig. 13
Turning the tonearm (48) rotates the segment
(205) thus actuating the power switch (106)
via pawl (135) and shift arm (146) and start—
ing motor (18) and platter (4) rotating.
The shut—off cycle after placing a record is
initated by the dog (M) of the platter (4)
and shut—off lever (163).
The shut—off lever (163) is guided onto the
dog by the movement of the tonearm when play—
ing the record with the aid of the shut—off
bar (164) proportionate to the groove lead
(Fig. 13 a). The eccentrically—mounted dog
forces the shut—off lever (163) back with
each revolution as long as the advance of
the tonearm only amounts to the width of one
groove.
Only the run—out groove with its increased
lead guides the shut—off lever (163) onto
the dog at a higher rate so that the shut—
off lever is picked up and moved along (Fig.
13 b).
As a result the shift arm is brought into
its neutral position the power switch inter—
rupting the power supply. Simultaneously,
the lift actuating lever (146) coupled to
the shift arm (155) is actuated and the to—
nearm (48) lifted.
Adjustment points:
1. Paul
a) Lock tonearm (48) on its rast. Paul should
not be pressed against segment (205). The
distance between pawl (135) and stop (A)
should be 0.1 — 0.2 mm (refer to Fig. 14).
If necessary, bend shift arm (146).
b) Move tonearm (48) inwards. Shift arm
(146) should be moved by cam (135) to its
inner stop. Adjustable with eccentric
pulley (E) (Fig. 14).
2. Power Switch
Extract unit plug from power line. Move
tonearm (48) to its rest (24). The power
switch (106) should operate shortly be—
fore the tonearm (48) reaches its rest
(24) (approx. 3 mm) (Fig. 15). Adjust by
bending the shut—off lever (158).
3. Segment,
The shut—off point can be changed with the
eccentric pulley (S) on segment (205)
(Refer to Fig. 16).
Fig. 14
Fig. 15
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43 1
dumm
3mm
13