Dual 704 - Troubleshooting: Tonearm and Motor; Tonearm Lowering Issues; Tracking and Anti-skating Problems; Motor Shut-off Failure

Defect
Cause
Remedy
Stylus
slips out of
playing groove
Tonearm does not set
down on record or
lowers too quickly
when operating the
cue control lever
(182).
With tracking force
and anti-skating in
0 position
tonearm
moves outwards or
inwards.
Motor does not switch
off
when tonearm sets
down on
rest.
Acoustic feedback
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Tonearm is not ba-
lanced
Tonearm tracking
force is
too low
Anti-skating
set-
ting incorrect
Stylus tip worn
or chipped
Excessive bearing
friction in tone -
arm bearing
Steel ball (165)
of shut-off bar
(164) missing
Friction of dog
of segment (205)
in guide piece
(221)
Excessive or insuffi-
dient damping as
a
result of
contamina-
tion of the
silicone
oil in the lift tube.
a)
Anti-skating de-
vice
maladjusted
b) Tight tonearm
leads
cause a
torque
Capacitor type sup-
pressor (110) in
p0 -
wer switch is defec-
tive
(shorted).
a)
Chassis components
(e.g. connecting
lEads) rubbing on
board cut out.
b) Connecting leads
too
light.
a)
Balance
tonearm
b) Adjust
tracking force to the
value stated
by the
cartridge manufacturer
c) Correct
anti-skating setting
d)
Renew stylus
e) Check
tonearm bearings
and readjust if
necessary
f) Renew
steel ball (136)
g) After using the
vertical tonearm control
the tonearm
should be returned to its
rest (24) to center the segment
(205).
Elend holding spring, if
necessary.
Referring to page 12 remove
cue control pla-
te (201).
Remove adjustment bush. Remove
lift pin
(204) and compression
spring (203).
Clean lift tube and
lift pin. Smear lift
pin evenly with
"Wacker Silicone Oil
AK 300 000".
Reassemble components.
a) Readjust
anti-skating device as described
on pages 11/12
b)
Slacken leads
Replace
capacitor type
suppressor in power
switch.
a) Line up
mounting board cut-out
according
to installation
instructions.
b)
Slacken or
lengthen leads.
4