Dual 1216 - Switch Latches into Stop Position When Tonearm Is at Rest; Tonearm Moves with Stylus Force and Anti-Skating Force at Zero: A) Outward, B) Inward; During Change, Stop and Start Operations, Noises from the Mechanism Can be Heard in System Speaker; No Sound

Fig. 23
Symptom Causa
Remedy
Symptom
Switch
latches into
"stop"
position when
tonearm
is at
rest.
Causa
Too much
clearance between
tab on switch
arm
(143) and
start lever (183)
Remedy
Adjust tab on
switch arm
so that lt
clears
start lever
by
1/64"
when main cam
is in
neutral
position.
Tonearm moves with
stylus force
and
anti-skating force at zero:
a) outward;
b)
inward
During change, stop and start
operations, noises
from the me-
chanism can be heard in system
speaker
No
sound
a)
Anti-skating
out of
adjustment
b) Too-taut
tonearm
leads
produce a
twisting force
Muting
switch
misadjusted. Dis-
tance
between contact
springs and
shorting
contact is too
great
a) Adjust skating lever so that horizontal movement
of tonearm causes no movement of anti-skating
spring.
b) Allow some slack in tonearm leads
Bend contacts so that, in the neutral position of the main cam
the spacing between contacts is about
0.02 inch. Clean contacts
Spacing -too
small
See
above
Motor will not shut off when
tone- Capacitor across
power switch is
Replace
capacitor (0.1 µF, 700 VI
arm is on arm
rest shorted
Acoustic
feedback a)
Chassis parts
(for
example
leads)
a)
Correct
cut-out according to
enstructions
supplied with
are
touching base
cut-out
unit. Move
cables
b)
Connecting cables are too
taut „ 15) . Allow
more slack in cables
14