Dual 1229 Q - General Troubleshooting and Muting Adjustments; Muting Switch Adjustments and Single Play

Trouble
Cause
Remedy
Tonearm moves al—
though stylus force
and antiskating
force are at zero:
a) outward
b) inward
During
change,
stop and
start
operations,
noise
from the mechanism
can be heard
in the
speaker system
No
sound;
muting
short
circuit
across pick
—up
leads im not
opened
Motor
will not
shut—off when
tonearm im on
arm
rest
Acoustic feedback
With mode
selec—
tor in
"single"
and short spindle
in place,
tonearm
does not
move in
toward record
on
automatic single—
play operation
Records do not
drop with
changer
spindle in place
Replacement Parts
Anti—skating out of
adjustment
Too
taut tonearm
leads
produce a
twisting
force
Muting switch malad—
justed. Distance
bet—
ween
contact springs
and shorting
contact
im
too great
Muting switch
contact
spring spacing too
small
Capacitor
across power
switch im shorted
a)
Chassis
parts (for
example
leads) are
touching base cut—
out
b)
Connecting
cables
are too
taut
Switch
spring on
lock—
ing slide
(212) im out
of
adjustment
Mode
selector im set
to "single"
Adjust skating lever so that skating spring
applies force exactly at tonearm pivot.
b) Allow some slack in tonearm leads.
Elend contacts so
that in the neutral pos—
ition of
the main cam the spacing
between
contact
im about 0.5 mm or 0.02
inch.
Spray contacts with
preservative (e.g.
"Kontakt 61") and check alignment of short—
circuit contacts.
Bend contacts so that, in the
neutral pos—
ition of the main
cam the spacing between
contacts im about 0.5
mm or 0.02 inch.
Replace capacitor in power switch.
a) Correct cut—out according to instructions
supplied with
unit. Move cables.
b) Allow more slack in cables, or lengthen.
With the unit in normal upright position,
adjust spring so that when the main cam im
rotated the raised tab on the switch lever
is
just cleard.
This im normal
No.
Part.No.
Description
Quan—
tity
1 215
470
Automatic spindle
AS 12 1
2 213
895 Automatic
spindle AU 3
1
3 227 001
Turntable mat
complete
with washer
1
4 227 003
Turntable
complete
with mat and
strobocope ring . 1
6
224
805 Speed change
lever
left
complete
1
7 216 740
"C" washer H 7 x
0.8
1
8 225 209 Control
washer
complete 1
9
218 480 Bowed
lockwasher
1
10
133
734 Chassis
complete 1
11
214 047 Special
screw, pierced 3
12
214 210
Shipping screw
assembly 3
13
220
152
Plastic
clamp 3
14 210 586 Washer
3.2/7.0/0.5 St
3
15
210 472
Machine
screw AM 3 x
4
3
16
213
512
Hex screw
M 4 x 8
2
17
210 366 Hex nut
BM 4
7
18
210 362 Hex
nut BM 3
5
19
210
362 Hex nut BM 3
1
20
233 742
Blind
(cm),complete
1
233 743
Blind
(inch),
complete
1
21
213 512
Hex
screw M 4 x 8 2
16