Dual 502 User manual
Dual
October
1976
Edition
502
Service
-
Manual
Dual
Gebrüder
Steldinger
•
7742
St.
GeorgenISchwarzwald
Download from www.dual.de
Not for commerical use
Fig.
1
Pick
-up
connection
diagram
"ssuars
,'
right
channel
,
C
I
i----i
red
I I
-
_C
m
C
)
1
connection
plate
right
channel
red
Mass
right
channel
green
Mass
sheet
Contact
biete
at
tonearm
head
Record
red
green
Cartridge
inner
side
of
groove
left
channel
—
I
02
left
channel
2
white
s
Tonearm
audio
cable
rd
with
miniature
plug
5-pin
right
channel
red
lead
left
channel
white
lead
b)
with
phono
plug
black
white
(red)
(yellow)
bleck
left
channel
white
Mass
left
channel
blue
___
0
1
white
blue
Tonearm
head
Spring
contacts
between
plug-in
cartridge
head
and
tonearm
outer
side
of
groove
right
channel
2
Contents
Page
Pick
-up
Connection
Diagram
2
Specification
3
Motor
and
Drive
4
Replacement
of
motor
pulley
4
Setting
nominal
speed
4
Tonearm
and
Tonearm
Suspension
5
Removal
of
tonearm
from
bearing
frame
5
Removal
of
tonearm
assembly
with
tonearm
bearing
5
Replacement
of
spring
housing
5
Adjusting
the
tonearm
bearing
6
Anti-Skating
device
6
Cue
Control
6
Replacement
of
cue
control
assembly
7
Starting
and
Shut-off
7
Tonearm
not
parallel
to
platter
8
Platter
does
not
start
after
connecting
the
unit
to
power
line
and
moving
the
tonearm
inwards
8
Platter
does
not
reach
nominal
speed
8
Stylus
slips
out
of
playing
groove
8
Tonearm
does
not
lower
or
lowers
onto
record
too
quickly
when
cue
control
is
operated
8
Acoustic
feedback
8
Exploded
views
10,
11
Spare
parts
9,
11,
13
Lubrication
14
Specification
Current
type
AC
50
or
60
Hz,
selected
by
exchanging
drive
pulley
Line
voltages
110
—
130
volts
and
220
—
240
volts
Motor
and
Drive
Dual
8
-pole
synchronous
motor
with
flat
belt
drive
system
Power
Consumption
<
10
watts
Current
Consumption
with
220V
50
Hz,
about
75
mA,
with
110V
60
Hz
about
140
mA
Platter
Non-magnetic,
1.3
kg,
300
mm
dia.
Platter
speeds
33
1/3
and
45
rpm
Overall
speed
variation
<-±
0.09
%
(assessed
in
accordance
with
DIN
455071
Signal-to-noise
ratio
Rumble
weighted
signal-to-noise
ratio
>
62
dB
acc.
to
DIN
45
500
Rumble
unweighted
signal-to-noise
ratio
>
41
dB
Tonearm
Torsion-resistant
aluminum
tonearm
in
four-point
gimbal
suspension
Tonearm
Bearing
Friction
vertical
<
0.007
p
horizontal
<
0.016
p
Pick
-up
Head
Detachable,
suitable
for
all
pick
-up
cartridges
with
Dual
catch
mounting
and
1/2"
mounting
and
a
deadweight
of
4.5
—
10
g
(including
hardvvare)
Tracking
Force
0
—
3
p
continuously
variable,
with
1/10
p
calibration
in
the
range
from
0—
1.5
p,
reliable
as
from
0.5
p
tracking
force
Weight
approx.
4.2
kg
For
dimensions
and
cutout
refer
to
Installation
I
nstructions.
3
Fig.
2
Motor
and
Drive
Motor
and
Drive
38
123
107
K
8
6
4
11
10
-
‘33111111W
r
Fig.
3
Fig.
4
Motor
field
coil
connections
220-240V
The
turntable
platter
and
the
gear
are
dri—
ven
by
an
8
—pole,
synchronous
motor
(123)
suspended
by
radially
located
elastic
mounts
and
having
a
very
small
stray
magnetic
field
am
well
am
little
vibration.
The
speed
of
the
motor
is
a
function
of
li—
ne
voltage,
temperature
and
load
variations.
Speed
is
dependent
on
and
proportional
to
line
frequency.
The
motor
is
adapted
to
50
or
60
Hz
(cps)
by
the
correct
choice
of
mo—
tor
pulley.
Pulley
for
50
Hz,
Part.
No.
234
453
Pulley
for
60
Hz,
Part.
No.
234
454
The
drive
is
linked
to
the
platter
by
a
pre—
cision—ground
belt
(11).
When
replacing
the
flat
belt
(11)
be
sure
that
the
precision—
ground
surface
of
the
belt
(dull
finish)
closely
contacts
the
drive
pulley
(107)
and
the
platter.
Platter
speeds
of
33
1/3
and
45
rpm
are
ad—
justed
by
linking
the
flat
belt
(11)
to
the
corresponding
step
of
the
drive
pulley
(116)
(Fig.
3).
Corresponding
to
the
actuation
of
the
speed
selector
(12)
the
control
lever
is
brought
to
the
appropriate
position
of
nominal
speeds
(33
1
/
3
or
45
rpm)
via
the
change—
over
lever
(101).
When
the
unit
is
electri—
cally
shut
off
the
changeover
is
blocked
by
locking
bar
(7).
Consequently,
the
speed
is
only
preselected.
After
switching
on
the
unit
and
turning
the
platter
(10)
the
lock—
ing
bar
(7)
disengages
the
changeover
layer
thus
guiding
the
flat
belt
(11)
to
appropri—
ate
step
of
the
pulley.
Replacement
of
Motor
Pulley
1.
Remove
flat
belt
(11)
from
motor
pulley
(116).
Undo
machine
screw
(125)
and
sli—
de
back
locking
bar
(126).
Remove
platter
(10).
.2.
Loosen
set
screws
(108)
and
pull
off
dri—
ve
pulley
(107).
3.
Put
complete
replacement
drive
pulley
on
motor
axle.
Remove
conical
sleeve.
Tigh—
ten
set
screws
(108)
uniformly.
Place
conical
sleeve
into
the
motor
pulley
(107).
4.
Put
platter
(10)
into
bearing
housing
(157)
and
secure
with
lock
bar
(126).
Re—
tighten
machine
screw
(125).
Put
the
flat
belt
on
the
drive
pulley.
5.
Check
nominal
speed
with
the
strobe
disk.
If
necessary,
readjust
as
described
below.
Uni
rig
of
nominal
speed
Lift
platter
mat
(3)
above
one
of
the
reces—
ses
(A)
and
turn
platter
(10)
by
hand
so
that
the
drive
pulley
(107)
becomes
visible.
Hold
the
drive
pulley
(107)
and
turn
the
co—
nical
sleeve
(K).
If
the
nominal
speed
is
too
high,
turn
the
conical
sleeve
(K)
counterclockwise.
If
the
speed
is
too
low
turn
the
conical
sleeve
clockwise.
Check
by
means
of
a
strobe
disk
and
repeat
adjustment,
if
necessary.
4
(4,
•
Secure
unit
in
repair
jig.
Remove
weight
(50).
Unscrew
straining
screw
(54)
and
set
tracking
Farce
to
zero
(65).
2.
Move
unit
into
head
position.
Remove
screening
plate.
Unsolder
tonearm
leads
an
the
connecting
plate
(142).
3.
With
the
unit
in
normal
position
screw
the
two
mounting
screws
SW
4.5
-
(57)
counterclockwise
to
the
stop
in
the
'frame
(55).
Attention!
Observe
bayonet
slide
mounting.
Slide
tonearm
rearwards
and
re-
move
lt
from
the
bearing
frame
(55).
When
reinstalling
the
tonearm
proceed
in
reverse
order.
Removal
of
tonearm
assembly
with
tonearm
bearing
Proceed
as
follows:
1.
Tormarrin
and
lbinearnn
Bearing
The
Dual
502
has
a
light,
torsion
resistent
all-metal
tonearm
which
is
suspended
in
a
gimbal.
Suspension
is
by
means
of
4
hardened
and
precision
polished
steel
points
which
rest
in
precision
ball
bearings.
Tonearm
bearing
friction
is
thus
reduced
to
a
mini-
MUM
Bearing
friction:
vertical
Bearing
friction:
horizontal
▪
0.07
mN
(0.007
p)
▪
0.16
mN
(0.016
p)
related
to
stylus
point.
As
a
result,
lt
ensures
extremely
favorable
pick
-up
conditions.
Before
adjusting
the
tracking
force
to
suit
the
built-in
pick
-up
cartridge
the
tonearm
should
be
balanced
with
the
scale
set
to
0.
Coarse
adjustment
is
carried
out
by
moving
the
stem
(50),
the
subsequent
fine
adjustment
by
turning
the
counterweight
is
designed
so
that
pick
-up
cartridges
with
a
deadweight
(incl.
hardwa-
re)
of
4.5
to
10
g
can
be
balanced.
The
tracking
force
is
adjusted
by
turning
the
coil
spring
mounted
in
the
spring
housing
(65).
The
spring
housing
is
provided
with
a
scale
with
markings
(0
-
30
mN/0
-
3
p)
which
allow
precise
setting
of
tracking
Far-
ce.
One
division
corresponds
to
1
mN
(0.1
p)
within
the
range
of
0.2
-
1.5
p,
and
2.5
mN
(0.25
p)
within
the
range
of
15
to
30
mN
(1.5
-
3
p).
Removal
of
tonearm
from
bearing
frame
1.
Secure
unit
in
repair
jig.
Set
tracking
force
scale
(65).
2.
Move
unit
into
head
position.
Remove
screening
plate
(144).
Unsolder
tonearm
leads
(142)
an
connecting
plate
(142).
3.
Disengage
compression
spring
(199)
an
bearing
frame
(yoke)
(198).
Turn
bearing
section
(177)
by
90
0
and
remove
it.
Re-
move
the
setting
bar
(176).
4.
Disengage
tension
fety
washer
(192)
ver
(191).
spring
(185),
undo
sa-
and
remove
skating
le-
5.
Remove
safety
washer
(189)
and
sliding
washer
(188).
Also
remove
shut-off
bar
(160)
from
segment
(184).
Fig.
5
Tonearm
bearing
46
61
60
55
64
180
187
45
44
65
67
47
184
6.
Undo
hex
nuts
(187).
Also
remove
segment
(184).
7.
Undo
hex
nut
(180).
Remove
tonearm
com-
plete
with
bearing.
When
attaching
the
tonearm
proceed
in
rever-
se
order.
However,
lt
should
be
properly
ad-
justed
when
mounting
the
segment
(184).
(Refer
to
page
7
).
Replacement
of
spring
housing
Remove
tonearm
(49)
from
bearing
frame
as
described
above.
Loosen
lock
nut
and
thread
pin
(44).
Unscrew
bearing
screw
(67).
Observe
left-handed
thread!
Lift
bearing
frame
(55).
Remove
disk
and
spring
housing
(65).
When
installing
the
spring
housing
make
sure
that
the
helical
spring
catches
the
recess
of
bearing
frame
(55).
Slide
in
washer
(66).
Tighten
bearing
screw
(67).
Reinstall
tonearm
(49).
Using
threaded
pin
(44)
and
lock
nut
(45)
adjust
bearing
play
as
described
below.
Fig.
6
Tonearm
bearing
(bottom
view)
64
54
50
191
187
184
176
160
5
Adjustment
of
tonearm
bearings
Anti-Skating
Device
First
balance
tonearm
exactly.
Both
bearings
must
haue
slight,
just
perceptible
play.
The
horizontal
tonearm
bearing
is
correctly
ad-
justed
when
at
anti-skating
settings
"0.5"
and
being
touched
lt
slides
in
without
re-
sistance.
The
vertical
tonearm
bearing
is
correctly
adjusted
when
lt
swings
in
fter
being
touched.
The
play
of
the
horizontal
tonearm
bearing
should
be
adjusted
with
threaded
pin
(44),
the
play
of
the
vertical
tonearm
bearing
with
threaded
pin
(60).
Fig.
7
Anti-Skating
The
anti-skating
force
is
set
by
turning
the
pointer
disk
(69).
According
to
the
setting
the
asymmetrical
cam
plate
(73)
mo-
ves
the
skating
lever
(191)
from
its
center
of
rotation.
The
anti-skating
force
is
transmitted
by
the
tension
spring
(185)
to
the
segment
(184)
and,
finally,
to
the
to-
nearm
(49).
Optimum
adjustment
is
carried
out
by
the
manufacturer
for
styli
with
a
tip
radius
of
15
gm
(conical)
and
5/6
x
18/22
µm
(ellip-
tical)
as
well
as
for
CD
4
pick
-up
cartrid-
ges.
Alterations
can
be
made
only
with
the
aid
of
the
Dual
Skate
-O
-Meter
and
the
test
record
and
should
only
be
done
by
an
autho-
rized
Dual
Service
Station.
Recheck
as
follows:
Balance
tonearm
(49).
Set
pointer
disk
to
0
(69).
Now
the
tonearm
should
remain
in
any
position
of
its
moving
range.
The
ho-
le
of
the
skating
lever
(191)
should
align
the
center
line
of
the
tonearm.
This
is
ad-
justable
with
the
eccentric
pulley
accessi-
ble
through
the
hole
in
the
mounting
plata
(38)
between
the
pointer
disk
(69)
and
the
bearing
base
(47)
(Fig.
13).
The
set
knurled
ring
(69)
to
"0.5".
Now
the
tonearm
should
return
from
the
center
of
the
platter
to
its
rest
(77).
Cue
Control
The
cue
control
permits
gentle
set-down
of
the
tonearm
at
any
desired
point
(outside
the
shut-off
range)
on
the
record.
By
moving
the
lever
(194)
(moving
forwards)
lift
cam
(197)
rotates.
The
slide
bar
(176)
connected
to
lt
transmits
this
movement
to
the
lift
pin
which
then
raises
the
tonearm.
After
Moving
the
tonearm
into
the
desired
position
on
the
record.
The
lever
is
releas-
Fig.
8
Cue
Control
ed
by
gently
moving
to
the
rear.
As
a
re-
sult,
slide
bar
(176)
is
released
and
the
tonearm
lowers
slowly.
Lowering
of
the
to-
nearm
is
damped
by
silicone
oil
in
the
lift
pin.
The
height
of
the
stylus
above
the
record
can
be
varied
by
turning
adjusting
bush
(179).
The
distance
is
reduced
by
turning
clockwise.
The
distance
between
record
and
stylus
can
be
increased
by
turning
counter-
clockwise.
The
distance
presst
by
the
fac-
tory
is
approx.
8
mm.
3
,
4
U
geeree>
194
197
176
193
177
175
6
179
183
Fig.
9
Replacement
of
Cue
Control
Assembly
1.
Secure
unit
in
repair
jig,
and
lock
to—
nearm.
2.
Move
unit
into
head
position.
3.
Disengage
compression
spring
(199)
an
bearing
yoke
(198).
Turn
bearing
section
(177)
by
90
0
and
remove
it.
Also
detach
slide
bar
(176).
4.
Disengage
tension
spring
(185),
loosen
lockwasher
(192)
and
skating
lever
(191).
5.
Remove
lockwasher
(189)
and
slide
washer
(188).
Remove
shut—off
bar
(160)
from
segment
(184).
6.
Loosen
hex
nuts
(187).
Remove
segment
(184).
7.
Remove
lockwasher
(166)
and
washer
(165),
disengage
catch
(164).
8.
Remove
machine
screw
(181).
Hold
tonearm
bearing.
Unscrew
hex
nut
(180)
and
com—
plete
cue
control
assembly
(178).
9.
Secure
tonearm
against
dropping
out
using
hex
nut
(206).
For
installation
of
the
cue
control
assembly
(178)
proceed
in
the
reverse
order.
When
mounting
the
segment
(184)
make
sure
that
it
is
properly
adjusted
as
described below.
Starting
and Shut
-
off
Turning
the
tonearm
(49)
rotates
the
segment
(184)
thus
actuating
the
power
switch
(127)
via
pawl
(164)
and
shift
arm
(170)
and
start—
ing
motor
(123)
and
platter
(10)
rotating.
The
shut—off
cycle
after
playing
a
record
is
initiated
by
the
dog
(M)
of
the
platter
(10)
and
shut—off
lever
(34).
The
shut—off
lever
(34)
is
guided
onto
the
dog
by
the
movement
of
the
tonearm
when
play—
ing
the
record
with
the
aid
of
the
shut—off
bar
(160)
proportionate
to
the
groove
lead.
The
eccentrically
mounted
dog
forces
the
shut—off
lever
(34)
back
with
each
revolu—
tion
as
long
as
the
advance
of
the
tonearm
only
amounts
to
the
width
of
one
groove
(Fig.
17
a).
Only
the
run—out
groove
with
its
in—
creased
lead
guides
the
shut—off
lever
(34)
onto
the
dog
at
a
higher
rate
so
that
the
shut—off
lever
is
picked
up
and
moves
along
(Fig.
17
b).
As
a
result,
the
shift
arm
im
brought
into
its
neutral
position,
the
power
switch
inter—
rupting
power
supply.
Simultaneously,
the
lift
actuating
lauer
(170)
coupled
to
the
shift
arm
(170)
is
actuated
and
the
tonearm
(49)
lifted.
Adjustment
Points
1.
Segment
a)
Lock
tonearm
(49).
Move
unit
into
head
position.
The
center
hole
(0
of
segment
(184)
should
be
centrically
above
the
frame
axis
(46).
The
play
between
the
pawl
(164)
and
the
stop
(A)
of
segment
(184)
should
be
0.3
to
0.5
mm.
This
is
adjustable
after
loosening
hex
nuts
(187)
and
by
moving
the
segment
(184).
b)
The
shut—off
point
can
be
changed
by
the
eccentric
pulley
an
the
segment
(184).
(Fig.
11).
Fig.
10
10
Fig.
11
34
37
160
7
Fig.
12
7
E
3
'
wau
3mm
2.
Paul
Move
tonearm
(49)
inwards.
The
play
be-
tween
the
stop
pin
(8)
and
the
shift
arm
(170)
and
the
mounting
plate
(124)
should
be
0.2
to
0.5
mm.
Adjust
by
turning
ec-
centric
pulley
(E),
if
necessary.
3.
Power
Switch
Extract
power
plug
from
receptacle!
Move
tonearm
to
its
rest.
Power
switch
should
not
switch
off
before
the
tonearm
(49)
is
approx.
3
mm
before
its
rest
(Fig.
12).
Adjust
by
bending
the
shift
arm
(146).
Defect
Fig.
13
Pick
-up
head
not
parallel
to
platter.
Defect
Platter
does
not
run
after
the
power
plug
of
the
unit
has
been
plugged
into
the
p0
-
wer
line
receptacle
and
the
tonearm
mo-
ved
inwards.
Platter
does
not
co-
me
up
to
its
requi-
red
speed.
Stylus
slips
out
playing
groove.
Tonearm
does
not
wer
on
record
or
wers
onto
record
quickly.
Cause
a)
b)
c)
a)
b)
c)
Belt
(11)
not
pro-
perly
put
on.
Power
supply
to
motor
(123)
inter-
rupted.
Drive
pulley
(107)
slackened.
Drive
pulley
(107)
is
not
correct
for
local
line
frequency.
Slippage
between
flat
belt
and
dri-
ve
pulley
(107)
or
flat
belt
(11)
and
platter
(10).
Nominal
speed
ma-
ladjusted.
of
Steel
ball
(161)
for
shut-off
bar
missing.
lo-
Damping
silicone
oil
lo-
in
cue
control
tube
too
excessive
or
too
low.
Acoustic
feedback.
a)
Chassis
components
(e.g.
connecting
leads)
rubbing
on
board
cut
out.
b)
Connecting
leads
too
tight.
Cause
The
pick
-up
head
has
been
moved
out
of
Po-
sition
on
the
tonearm
tube
during
transport.
Rmmedy
Remove
platter.
Using
a
screw
driver
slacken
screw
on
the
pick
-up
head
through
the
hole
provided
for
this
purpose
in
the
chassis
plate.
After
aligning
the
pick
-up
head
re-
tighten
screw.
Reime
a)
Install
belt
properly
put
on.
b)
Check
connection
on
switch
plate
(13Z,
and
power
supply
plug.
c)
Retighten
drive
pulley
(107).
a)
Replace
drive
pulley
(107).
b)
Clean
friction
surfaces
of
flat
belt
(11,
,
drive
pulley
(107)
and
platter
(10).
Re
-
neu
flat
belt,
if
necessary.
c)
Readjust
nominal
speed.
Replace
steel
ball
(161).
Remove
cue
control
assembly
(178)
(rarer
to
page
7).
Unscrew
adjusting
bush
(179),
remo-
ve
lift
pin
(183).
Remove
compression
spring.
Clean
lift
tube
and
lift
pin
and
smear
even-
ly
with
"Wacker
Silicone
Oil
AK
500
000".
Reassemble
parts.
Wipe
off
excessive
silico-
ne
oil
after
assembly.
a)
Line
up
mounting
board
cut-out
according
to
installation
instructions.
b)
Slacken
or
lengthen
leads.
8
Replacement
Parts
44,
Pos.
Part.
No.
Description
Qty.
1
220
213
Centring
disc
1
2
236
036
Washer
1
3
240
958
Turntable
mat
complete
1
4
234
428
Support
assembly
1
5
210
472
Machine
screw
AM
3
x
4
5
6
232
086
Tension
spring
1
7
237
220
Locking
bar
1
8
234
814
Tension
spring
1
9
210
194
"C"
clip
G
2
x
6
1
10
240
959
Turntable
complete
with
mat
1
11
234
435
Flat
belt
1
12
237
976
Speed
control
knob
1
13
240
960
Speed
control
blind
compl.
1
14
213
260
Pin
2
x
6
6
19
239
414
Shipping
screw
compl.
3
20
210
146
Lock
washer
3.2
8
21
201
632
Rubber
washer
3
22
237
117
Washer
3
23
237
118
Lock
washer
3
24
237
668
Special
screw
3
26
237
223
Contact
plate
compl
1
27
234
611
Handle
1
28
210
182
Bowed
lock
washer
1
29
210
630
Washer
4.2/8/0.5
1
30
210
197
"C"
clip
G
4
x
8
1
31
237
224
Tonearm
head
compl.
1
32
236
242
TK
24
Cartridge
mount
1
33
210
142
Lock
washer
1.2
1
34
234
766
Shut—off
lever
1
35
210
146
Lock
washer
3.2
8
36
234
764
Friction
plate
1
37
234
762
Support
1
38
240
961
Chassis
compl.
1
39
230
529
Threaded
piece
4
40
236
710
Compression
spring
(Motor
side
rear)
1
236
711
Compression
spring
(Motor
side
front)
1
236
712
Compression
spring
(Tonearm
side
rear)
1
236
713
Compression
spring
(Tonearm
side
front)
1
41
237
226
Spring
mount
compl.
(Motor
side
rear)
1
237
227
Spring
mount
compl.
(Motor
side
front)
1
237
228
Spring
mount
compl.
(Tonearm
side
rear)
1
237
229
Spring
mount
compl.
(Tonearm
side
front)
1
42
200
723
Rubber
damping
block
4
43
200
722
Steel
cup
4
44
234
635
Lock
nut
2
45
234
651
Grub
screw
1
46
240
962
Frame
compl.
1
47
240
963
Cover
compl.
1
48
239
193
Fillister
head
screw
M
3
x
6
3
49
237
232
Tonearm
compl.
1
50
240
964
Weight
compl
1
51
233
744
Yoke
1
52
236
160
Support
plate
2
53
239
565
Machine
screw
M
2.5
x
3
2
54
238
461
Clamp
bolt
1
55
240
966
Bearing
rock
1
56
238
201
Plata
1
57
238
202
Fixing
screw
1
58
238
623
Needle
1
59
237
672
Pin
1
60
234
635
Lock
nut
2
61
230
063
Grub
screw
1
62
236
049
Set
screw
1
63
218
894
Lock
washer
1
64
240
967
Bearing
compl.
1
65
236
907
Spring
housing
compl
1
66
237
563
Washer
1
67
237
564
Bearing
screw
1
68
240
968
Anti—Skating
compl
1
69
238
183
Washer
with
needle
1
70
238
182
Numeral
washer
1
71
200
444
Spring
washer
2
72
216
867
Lock
washer
1
73
225
176
Curve
washer
1
74
210
362
Hex
nut
M
3
5
75
240
969
Cover
front
compl.
1
76
213
260
Pin
2
x
6
6
9
Fig.
14
Exploded
view
of
parts
above
the
chassis
plate
rIn
(29
L _
_
Jg
0
-- Cb
0 -
-4
-
L2J
-CD
10
Fig.
15
Exploded
view
of
parts
below
the
chassis
plata
—
11
Pos.
Part.
No.
Description
Qty.
77
236
911
Tonearm
rest
compl.
1
78
210
362
Hex
nut
M
3
5
79
210
147
Lock
washer
4.0
1
80
238
666
Stud
1
100
210
145
Lock
washer
3
101
234
824
Switch
lever
1
102
210
184
Lock
washer
1
103
236
374
Yoke
spring
1
104
238
177
Connecting
part
1
105
210
586
Washer
3.2/7/0.5
1
106
210
362
Hex
nut
5
107
240
972
Motor
pulley
50
Hz
compl.
1
240
973
Motor
pulley
60
Hz
compl
1
108
233
137
Grub
screw
M
2.5
x
3
2
109
210
366
Hex
nut
M
4
4
110
210
480
Machine
screw
M
3
x
6
1
111
210
609
Washer
3.2
1
112
232
856
Screen
plate
compl.
1
113
232
841
Rubber
damping
block
3
114
232
840
Inlayer
compl.
1
115
234
447
Top
bearing
bracket
compl
1
116
232
855
Spacer
2
117
209
939
Gable
grommet
1
118
234
449
Stator
110/220
V
compl
1
119
233
815
Machine
screw
M
2.5
x
18
1
120
234
450
Armature
compl
1
121
234
451
Bottom
bearing
bracket
compl.
1
122
232
851
Centring
crew
2
123
234
452
8
-pole
Motor
SM
840
110/220
V
compl
1
124
240
961
Chassis
compl.
1
125
210
472
Machine
screw
M
3
x
4
5
126
237
970
Holding
bar
1
127
233
009
Power
switch
compl.
1
236
607
Power
switch
compl.
with
Spec.-C.
1
128
236
335
Silbe
1
129
200
444
Spring
washer
1
130
233
012
Power
plate
compl
1
236
605
Power
plate
compl.
with
Spec.-C.
1
131
230
296
Tension
spring
1
132
230
148
Switch
slide
1
133
219
200
Snap
spring
1
134
209
505
Capacitor
10
nF/1000
V/10
%
1
230
355
Capacitor
68
nF/
150
V/20
%
1
135
233
010
Cover
1
136
210
498
Machine
screw
1
137
236
219
Cynch
socket
platte
compl
1
138
209
975
Soldering
lug
1
139
210
475
Machine
screw
M
3
x
5
1
140
236
195
Shield
1
141
210
472
Machine
screw
M
3
x
4
5
142
237
238
TA-connecting
plate
compl
1
143
210
480
Machine
screw
M
3
x
6
1
144
236
080
Shield
1
145
210
472
Machine
screw
M
3
x
4
5
146
238
178
Switch
slide
1
147
210
607
Washer
3.2
1
148
234
759
Screw
pin
1
149
210
146
Lock
washer
3.2
8
150
236
950
Rubber
damping
block
1
151
234
760
Stop
lever
1
152
234
799
Tension
1
153
210
916
"C"
clip
3
1
154
237
785
Wire
spring
1
155
210
586
Washer
3.2/7/0.5
1
156
234
759
Screw
bolt
1
157
237
236
Support
housing
compl.
1
158
236
759
Earth
spring
1
159
210
515
Machine
screw
M
4
x
6
3
160
234
807
Shut-off
bar
1
161
209
357
Steel
ball
3
1
162
232
104
Ball
bearing
(bead)
1
163
210
469
Machine
screw
M
3
x
3
3
164
234
786
Catch
1
165
210
643
Washer
4.2/12/1
1
166
210
146
Lock
washer
3.2
8
167
210
362
Hex
nut
M
3
5
168
210
145
Lock
washer
2.3
4
12
Pos.
Part.
No.
Description
Qty.
169
234
789
Post
spring
1
170
234
756
Shiftarm
1
171
234
759
Screw
pin
1
172
210
146
Lock
washer
3.2
8
173
.237
969
Bearing
slide
1
174
210
469
Machine
screw
M
3
x
3
3
175
237
974
Compression
spring
1
176
234
783
Slide
bar
1
177
237
975
Bearing
1
178
237
239
Lift
plate
compl.
1
179
234
800
Adjustment
sleeve
1
180
210
366
Hex
nut
M
4
4
181
210
472
Machine
screw
M
3
x
4
5
182
234
798
Compression
spring
1
183
234
795
Lifting
bolt
compl.
1
184
240
970
Segment
compl.
1
185
218
591
Tension
spring
1
186
201
164
Adjustment
washer
1
187
210
362
Hex
nut
M
3
5
188
201
187
Sliding
washer
1
189
210
145
Lock
washer
2.3
4
190
229
688
V
—spring
1
191
238
192
Skating
lever
1
192
210
146
Lock
washer
a
193
234
760
Lift
actuating
layer
1
194
240
893
Lift
mave
1
195
237
543
Rubber
sleeve
1
196
234
778
Torsion
spring
1
197
234
777
Lift
cam
1
198
237
972
Support
bracket
1
199
233
710
Tension
spring
1
200 210
469
Machine
screw
M
3
x
3
3
201
231
079
Cable
holder
compl.
1
202
209
436
Socket
for
flat
prang
3
203
207
303
Pick
—up
lead
compl.
with
cynch
plug
1
204
226
817
Pick
—up
lead
compl.
with
miniatur
and
flat
plug
..
1
205
209
424
Miniature
plug
1
206
214
602
AMP—connector
2
207
209
425
Cynch
plug
withe
2
208
209
426
Cynch
plug
black
2
209
232
996
Power
lead
Europe
compl.
1
210
232 995
Power
lead
US
oompl.
1
***
214
120
Hardware
for
cartridge
mounting
1
***
238
409
Mounting
instructions
1
***
238
408
Operating
instructions
1
***
238
969
Operating
instructions
UP
1
***
240
971
Shipping
carton
502
1
***
236
920
Shipping
carton
ES
502
1
***
Not
illustrated
13
Modification
reserved!
Lubrication
Renotac
No.
342
adhesive
oil
All
bearing
and
friction
points
of
the
unit
are
adequately
lubricated
at
the
works.
Re—
plenishment
of
oil
and
grease
is
only
neces—
sary
after
approximately
2
years
of
normal
use
of
the
record
player
as
the
most
impor—
tant
bearing
points
(motor
bearings)
haue
sintered
metal
bushes.
Bearing
points
and
friction
faces
should
be
lubricated
sparingly
rather
than
generously.
lt
is
important
that
no
oil
grease
should
come
in
contact
with
the
friction
faces
of
the
Fiat
belt,
drive
pulley
and
flywheel
ro—
tor,
otherwise
slip
will
occur.
When
using
different
lubricants,
chemical
decomposition
can
often
take
place.
To
pre—
vent
lubrication
failure
we
recommend
using
the
original
lubricants
stated
below.
Fig.
16
Dual
502
13
220-2400-
5010
‚0w,0
ql,i)
A
e
BP
Super
Viscostatic
10
W/30
Shell
Alvania
No.
2
Isoflex
POP
40
Silicone
oil
AK
500
000
920
360-2
5/1176
Printed
in
Germany
by
Dual
Table of contents
Other Dual Turntable manuals
