Dual 521 User manual

L
L._
•••••
Dual
Edition
August
1978
Service
Manual
521
Dual
Gebrüder Steidinger
7742
St.Georgen/Schwarzwald
Download from www.dual.de
Not for commerical use

Fig. 1
TA-Anschlußschema /
Audio
Connection Diagram
/ Schema de branchement /
Esquema
de
conexion
del fono captor
a) mit DIN-Stecker
5-polig / with DIN-plug 5 pin
avec fiche DIN 5
pöles / con enchufe DIN de 5 poles
rechter Kanal
right channel
canal droit
canal
derecho
rot / red / rouge /
rojo
linker
Kanal
left
channel
canal dauche
canal
izquierdo
weiß
/ white / blanc /
blanc
Tonabnehmerkabel
Tonearm audio cable
".•
Cäble
de
BF
Cable del
fonocaptor
b) mit
Cynchstecker / with phono plug
avec fiche cynch /
con enchufe Cynch
rechter Kanal / right channel—I—
Canal droit
/ Canal derecho
!
rot (schwarz) / red (black)
rouge
(noir) / rojo
(negro)
\ 1
Masse rechter
Kanal - 1
Mass right channel
1
Masse canal droit
1
masa canal
derecho
Masse draht / Mass
lead
Mass cable /
Mass
cable
rechter
Kanal
right channel
canal droit
r
1
canal
derecho
rot / red / rouge / rojo
t 1
Masse
rechter Kanal I
Mass
right
channel i
Masse
canal
droit
masa canal
derecho
grün /
green /
vert /
verdc
I
I
r
1
I
rl
I
1 I
1 I
11 1 1
I 1
1 - 1
linker Kanal
—
____J
1
left
channel
1 canal
gauche
1
canal izquierdo
+weiß / white
/ blanc / blanco
1
I
Masse linker
Kanal
1
Mass left
channel
1
Masse
canal
gauche
masa
canal
izquierdo
1 blau
/ blue
/ bleu /
azul
L J
// 7 / /
J
//
I II
II
Masse schwarz
Mass black
Masse noir
Masa
negro
Masseblech
Mass sheet
Prise de
masse
chapa de
masa
Kontaktplatte
Contact plata
Plaque de
contacts
Placa de
contacto
1
I i
i --linker Kanal
/ left channel
I I
1 Canal
droit / Canal
izquierdo
1
i
gelb (weiß) / yellow
(white)
I
jaune (blanc) /
amarillo
(blanco)
I
I
I 1
T
-1
i
1
IN
1 s
i
1
Cynch-Tonabnehmerkabel
I
I
1 1
Pick -up
lead with
Cynch plug
I
! :
Cäble de BF avec
fiche Cynch
I I I
Cable
del fonocaptor con
I I
1 I
enchufe
Cynch
I
I I
1
1 1 1
1 1
I
i 1
1
1 --
Masse linker
Kanal
I
1
11 1 Mass left channel
1 1 1
Masse canal gauche
I I I
masa canal
izauierdo
I 1
1 I
I 1
1 1
1 I I
1
1 1 i
I
lj
1
r -
r e \
i
L_
1
r
I I
I
I I
L
1
1
I
I
I 1 1
I 1 I
J 1_,
/Z 7/
II
III
Kurzschließer
Muting switch
Court-circuiteur
Dispositivo cortocircuitador
U
77)77
7—Tonarmkopf
Tonearm
head
Täte
magnätique
Cabezal
fonocaptor
2

Table of Contents
Page
3
Specif ication
4
Motor and drive
4
Speed
selection
4 Turntable
4
Belt
4
To replace the
motor pulley
5 Stroboscope
5 Tuning to the pitch-of-tone level
6
To replace the
spring case
6
To adjust
the tone arm
bearings
6
Tone arm with bearings
6
To remove the
tone arm from
its bearing
frame
6
To
remove tone arm
complete with
bearings
6
Anti-skating device
7
Tone arm lift
7
To replace the lift
plate
7
Tone arm control
8
The starting sequence
8
Manual start
8
Continuous play
8
Muting switch
8
Final shutting-off
9
Stop circuit
9
Adjustments
9 Tone arm
set-down point
9
Set -down point
for 30 -cm
records
9
Set
-down point for
17 -cm
records
9
Shut-off
point
9
Tone arm l ift
height
9
Troubleshooting
9
Turntable does
not start
9 Turntable
speed
unsatisfactory
10
Tone arm
improperly lowered
10 Acoustic
feedback
10 Rated speed
borders
pitch adjustment
range
10 List of spare parts ( I
nstructions)
12
Explosivie views
14 Lubrication
Specification
Mains frequency
50 or 60 Hz; use associated motor pulley
Maind voltage
110 — 130 V or 220 — 240 V, pluggable
Drive motor
Dual model, 8 -pole, synchronous
Drive
by motor pulley-to-turntable belt
Power consumption
10
watts approx.
Current drain
75 mA at 220
volts, 50 Hz; 140 mA at 117 V 60 Hz
Turntable
non-magnetic, dia. 304 mm,
vveight 1.2 kg
Record speeds
33 1/3
and 45 revolutions per
minute
(rpm)
Tone arm lift
automatic, coupled to
speed selection
Pitch of tone
adj. range about 1 semitone (6 %) ,
both speeds
Wow and flutter
less than ± 0.1 % by
test standard
Signal/noise
ratio
instrinsic min. 60 dB, external min. 40 dB
Tone arm
tubular
anti-torsion metal tube
Tone arm bearings
universal four-point gimbal
suspension
TA brg. friction
vertical less than 0.10 mN ref. to
stylus point
horizontal less than 0.40 mN
ref. to stylus point
Tracking
force
continuously
adjustable in the range
0—
50 mN
(0—
5 gr);
reliable operation
with 5 mN
(0,5 gr) and higher
Pickup
head
detachable, accpets
all Dual snap-in cartridges and all
other 1/2" systems
weighing between 4.5
gr and 10 gr, mounting material
included
Weight
4.1 kg
For dimensions and bench
cutout, refer to Installation I nstructions.

Fig. 2
Fig. 3
Fig. 4
NOTE: The item numbers
mentioned in the text refer to the illu-
strations,
exploded views (page 12) and Parts List.
Motor
and Drive
Tu rntable
and mechanism are driven
by the motor (132) (see
Fig.
21). This
shaded-pole motor runs
vibration-free in radially elastic
mounts and has
extremely low magnetic leakage.
The
motor speed is indpendent of voltage,
temperature, and load
variation. lt can only fluctuate with the
mains frequency. Two
motor pulleys permit adaptation to the
mains frequency of either
50 or 60 Hz; one
pulley (116) is showin in both
Fig. 2 and Fig. 3.
For 50 Hz use the pulley part no. 234 453,
for 60 Hz use the pulley part no. 234 454.
The driving force is transmitted to the turntable
(7) by belt (15).
Speed Selection
To adjust the turntable speed to either 33 1/3 or 45 rpm,
the belt
(15) is shifted to the one step of pulley (116) with the associated
diameter (see Fig. 3). This is
achieved when you adjust the speed
lever (18) so that the START/STOP lever (48) and the spring
lever will move the change-over
lever into the desired (33 or 45
rpm) position. When the record player is turned
oft, the change-
over lever is blocked by the blocking bar (12) and the speed is
just preselected. Only
when the turntable (7) starts running, the
blocking bar (12) will
release the change-over lever. The latter
will then
shift
the belt (15) to that step of motor pulley (116)
which corresponds to the desired speed.
Turntable
The turntable (7) is secured to the turntable bearing
tube by the
lock tab (151).
To remove the turntable, lift its top
layer through one of its cutouts
and rotate the turntable until the cutout is
positioned above the
motor pulley. Remove the belt (15) from the motor
pulley
(116)
and place
lt
onto the
turntable.
Continue rotating the turntable until the cutout is positioned
above the
turntable lock tab
(151);
press
the latter
outward and
lift
oft
the turntable.
Slacken the screw (150).
Belt
To replace the belt
(15), first remove the
turntable as above des-
cribed, then
separate the belt from the turntable (7).
Mount the
new belt on
the turntable..
NOTE: the
ground
(mat)
surface of the belt
should face the
driven
gart. Install the turntable and place the belt (15)
over the motor
pulley
(116).
To Replace the Motor Pulley
1. Separate
the belt (15) from
pulley
(116) and remove the turn-
table. Remove the toothed
belt (109).
2. Disengage the
tension spring (114) from the shield (122).
3. Unscrew the hex. nut (110), remove the setting cam
(111),
belt
pulley (112), and
counter bearing (113).
4. Slacken the grub
screws (106) and slide
oft
the motor
pulley
(116). Slide the replacement pulley onto the motor shaft.
Remove the taper sleeve.
Pay attention on the internal distan-
ce roller.
Position the motor pulley
(116) at proper height
above the
mounting plane, see Fig. 3. Uniformly tighten the
grub screws (117). Put the
taper sleeve into the motor pulley
(116).
5. Mount the
counter bearing (113), the
belt pulley 1 (112) and
the
setting cam (111) and secure
them in place with hex. nut
(110).
Install the tension spring (114)
and the toothed belt
(109).
Mount the turntable.
Pull the belt (15) and
place lt around
the
motor pulley
(116).
6. Turn the kno (16) to
adjust the belt pulley to
its mid
Posi-
tion. (The nose
of the belt pulley (112)
should poin't to the
motor pulley center
line.) Adjust the hex. nut (110) to
the
rated
speed; the speed increases when you turn the nut
clock-
wise
and vice versa.
4

Stroboscope
Even during
the play mode the stroboscope can be
used to check
the accuracy of the turntable
speed adjustment to 33 1/3
and
45 rpm.
Accurate adjustment is
manifested by seemingly motionless bar
marks of the stroboscope. I f the
marks run in the same direction
as the turntable, the speed is too high and
vice versa.
To vary the adjustment, operate the "pitch"
knob (16). The strobo
marks
on the turntable rim, shovvn in Fig. 12,
have the following
meanings (starting from the lowest row):
33 1/3 rpm at 60 Hz,
33 1/3 rpm at 50 Hz, 45 rpm
at 60 Hz, 45 rpm at 50 Hz.
To exchange the glow lamp GI (245), remove the screws
(248)
and the strobo case
(244).
Fig. 5
R1
D1
R2
C2
Fig. 6 Motor
connection scheme
1
GI
C1.
Tuning to the
Pitch-of-tone Level
This feature is
independent of the power
and controls both turn-
table speeds. The
tuning range is max. 6
% or about one
semi-
note.
When you rotate the knob
16, you will move the belt
pulley 2
(105). This motion
will be transferred by the
toothed belt (109)
to the belt pulley
1 (112
in
Fig. 9). As a result, the counter
bearing
(113) and taper sleeve of
motor pulley (116) are shifted
upwards
or downwards, respectively. The
taper sleeve of the motor
pulley
(116) causes the
pulley diameter to be reduced
or increased, which
permits the variation
of the rated speed within the
said range of
± 3 %.
Fig. 7
Fig. 9
105 13
16 109 112 111 110 116 113
zzA ,
5

Fig.
10
45
47
46
63
42
43
44
64
66
67
200
202
To Replace the Spring Case
Remove the tone arm (58) from the
bearing frame (55) as described
on this page. Slacken the lock nut (47) and the
grub screw (46).
Unscrew
the bearing
screw
(66).
NOTE: Left-hand thread.
Lift the
bearing
frame (55).
Remove
washer
(65) and
spring case
(64). When
reassembling, make sure the helical spring
snaps into
the cutout of bearing
frame (55).
Slide-in the washer
(65). Tighten
the
bearing screw (66).
Install the tone arm
(50).
Adjust
the
bearing backlash with the
grub screw (47) and the lock nut (46)
as below described.
To Adjust the Tone Arm
Bearings
Exactly balance the
tone arm. Both bearings should have a small,
just perceptible backlash or play. Proper
adjustment of the hori-
zontal
bearing is
achieved if
the tone arm can freely
slide from the
record inside to outside while
the anti-skating adjustment is 0.5.
Proper adjustment of the vertical bearing is achieved when
the
carefully kicked tone arm
swings into balanced position.. Adjust
the
backlash by grub screws (44) and (46) for the
horizontal and
vertical bearing, respectively.
Fig.
11
Tone Arm with Bearings
The light-weight torsion-resistant aluminum-tube tone arm
has a
universal gimbal bearing characterized by four hardened and
lapped steel points located in high-precision ball bearings. The
tone -arm bearing friction is thus reduced to a
minimum, namely
less than 0.10 mN or 0.010 gr in vertical and
less than 0.40
mN or 0.040 gr in horizontal direction,
referred
to the stylus point.
This ensures particularly satisfactory tracking conditions. Before
adjusting the tracking
force, which should comply with the pick -
up system used, adjust the tone
arm to its balanced position while
the tracking-force
scale indicates zero. For coarse balancing, shift
the weight (51) with mandrel; for fine
balancing, rotate the weight.
This
weight permits balancing of
pickup systems weighing bet-
ween 4.5 and 10
gr including mounting
material.
The tracking
force is produced by tensioning the helical spring
located in the
spring case (64). The 'atter has a scale with marks
permitting
exact adjustment of the tracking force within the
range
0-
50 mN
(or 0 -
5
9r).
To Remove die Tone Arm from its Bearing Frame
1. Mbunt
the record player in the servicing fixture (repair ijg).
Remove the weight (51) and tensioning screw
(58). Adjust
the scale of
the spring case (64) to zero.
2. Turn the
record player into head position. Remove the shield
(149). Unsolder thetone-arm leads from the
muting switch (146).
3 Record player in normal position.
Screw the two mounting
screws (60) counterclockwise until they abutt against the
bearing
frame
(55).
NOTE: Bayonet union. Shift the tone
arm to the rear and lift it
from the bearing
frame (55).
To assemble, proceed in reversed sequence.
To
Remove Tone Arm Complete with Bearings
1. Mount the record player in the repair jig. Adjust the tracking-
force
scale on the spring case (64) to zero. Lock the tone arm
(50) in place. Remove the weight (51).
2. Adjust record player to
head position. Remove the shield (149).
Unsolder the tone -arm
leads from muting switch
(146).
3. Remove the main lever (177). Remove the lock washer (242).
Rotate the set screw (42) until guide bearing (241) and set-
ting bar (228) come free. Remove lock washer (228) and set-
ting bar
(204).
4. Unlock the tension spring (212), loosen the lock
washer (216)
and remove skating
lever (215).
64
5. Remove lock
washer (202) from segment (200).
6. Remove hex. nuts (202) and segment
(200).
7. Hold the tone arm (50). Remove hex. nut (42) and washer
(41).
Remove tone arm complete with bearings.
To install the
tone arm, proceed in reversed
order.
Anti-Skating Device
To adjust the anti-skating
force, operate the pointer scale provi-
ded on the cover (67).
Depending on this adjustment, the
skating
lever
(215) will be deflected from the tone -arm
pivot point. The
anti-skating force is
transmitted by the tension spring (212) to
the segment (200) and thus to the tone arm
(50).
The factory adjustment is
optimal for any stylus having a spheri-
cal
tip radius of 15 /Im or
elliptical of 5 - 6 and 18- 221.1m as
well as for CD 4 pickup systems.
These factory-adjusted values may
bevaried only m an authorized
Dual service workshop using a
Dual Skate -0 -Meter and a test record.
6

Fig.
12
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Z yd r Al e : l
a s % 13 .
BB13 Ni •
Mama
B IENEN WO min ..i.
z !
204 219
223
218
Tone
Arm
Lift
When
you
move the
lift
control bar
(218) to
the LIFT
position
V
, the
tone arm
will be
lifted
and in
position LOWERY
it will
be lowered
through the lift cam
(219)
and
the
setting bar
(204).
The
tone arm
lift has
priority
over the
set-down
mechanism.
When
the
record player
is started
with the
control
bar
(218) in
the
LIFT
position V
, the
set-down
mechanism
will
move the
tone arm
across
the record
in the
auto
mode.
Lowering of
the
tone arm
will take
place
only atter
you have
adjusted
the
control
bar (218)
to
the
POWER position
1.
The
height of lift
should be
3 to 5
mm; it can
be
adjusted by
the setscrew
(40).
To
Replace the Lift Plate (158)
1.
Remove the main lever (177) and
the lock washer (242).
Rotate
the
setscrew (42)
until guide
bearing (241) and set-
ting bar
(204) are
released.
Remove lock washer (228) and
setting bar
(204).
2. Unhook the tension spring
(212), loosen lock washer (216)
and remove
skating lever (215).
3. Remove lock
washer (206) and disk
(205). Detach the shut-
off bar (179) from segment
(200).
4.
Remove
hex. nuts (202) and
segment
(200).
5.
Remove the
screws (15) and
the lift plate
(158).
To reassemble, proceed in reversed
order.
Tone Arm
Control
The tone arm motions
for auto lowering and
lifting are con-
trolled
by cams under the
cam wheel (161) while
the wheel
rotates through 360 0 .
Lifting and
lowering motions are
controlled by the main
lever
(177)
and lifting bolt while
the horizontal motions of
the tone
arm are controlled by
lever (177) with the segment
(200).
The
lifting/lowering mechanism is
active for 30 -cm and 17 -cm re-
cords; it is coupled to the turntable-speed
change-over function.
The tone -arm set-down points are
determined by the spring pin
of segment (200) abutting against the
setting bar (204). The
horizon-
tal motion is limited by the segment
abutting against the setting
bar
(204) which is lifted only
during the set-down
Operation by
the main lever (177) and thus comes
into the sluing range of the
spring pin provided on the
segment.
After the
tone arm has been set
down on the record, the
setting
bar
(204) is released and
returns to its nromal
position, thus es-
caping
from the range of the
spring
rin.
The tone arm
is thus free
to move in horizontal direction
during the play-back.
Fig. 13
241
72
177
202 200
204
242
241
40
179
215

Fig. 15
230
225
204
Fig.
16
Fig.
17
196
207
161
195
186
192
193
247
248
A
179
164
PR
166
161
a.)
b.)
The
Starting Sequence
When you
adjust the START/STOP
lever to the START
position,
the turn-on
lever (207) is rotated to the
outside and will trigger
the following
functions:
a) The turn-on
lever (207) rotates the
shift links (193) seated
on the riffled pins (183). At
the same time, the power switch
is turned on (135) and both
the motor (132) and
turntable
start rotating.
b) The
shift link (193) enters the
range of the reversing lever
which is forced into its start
position by the subsequent ro-
tation of the cam
wheel (161).
c)
Operation of the START/STOP
lever (48) will also release
the
start angle (191) that is pulled
towards the cam wheel
by the tension spring (192). The shut-off
lever isthus brought
into the range of dog M on the turntable pinion (PR)
(Fig. 17)
and the cam wheel is driven.
Manual Start
When the tone arm
is guided towards the
record manually, the
pawl (236)
coupled to the shift
arm (186) will
engage with the
square bolt
mounted in the deck
plate and will keep the
shift
arm in this
position. Coupled to the
shift arm is the shut-off
lever (189) that will
turn on the power
switch and thus initiate
the turntable
rotation. When the run-out
groove of the record
played has
been reached, the tone arm
is restored and the record
player is turned off by
automatic means. If you lift the tone
arm
before the end of play
and put it back onto its support, the
bolt
of segment (200) will
release the engaged position
of the pawl
(236) so
that the shift arm is returned
to its initial position and
the power switch will turn off.
Continuous Play
This
mode is operative when
you have adjusted the
knob (69) to
00
. The knob (69)
will rotate the reversing
angle (231) and the
!atter
is forced into the starting
position by the turn-on lever (207)
at the end of
record, the tone arm is restored
to its rest position
on the
support near the record rim. This
procedure will be repea-
ted until the
START/STOP lever (48) is adjusted to
STOP or the
knob (69) is
adjusted to no. 1 position.
Muting
Switch
The
muting
switch is
provided to
avoid
noisy lifting
and
lowering
of
the
tone arm
in the
auto
made. The
contact
springs of
both
channels
are
controlled
by the
cam
wheel. The
resulting
short-cir-
cuiting
of the
pickup
leads is
ineffective in
the rest
state
of the
record
player.
Adjustment
In the
zero
position of
the cam
wheel, a
contact
separation
of
about 0.5
mm
should exist
between
the
contact
springs
(F) and
the
shorting
straps (L)
in Fig.
16. I f
necessary,
bend the
shorting
straps.
Maintain
contact
springs in
good state
by a
spraying
agent.
Final
Shutting-off
The
shutting-off
and stop
functions
are control
led by the
reversing
lever U. Lever
U is
brought into
the stop
position by
the main
lever
(177) (longer
leg of the
reversing lever
towards the
cam
wheel
center). The
shut-off bar
(179) is dragged
during the
play
in
proportion to the
motion of
segment
(200). The
shutting-off
operation after
the end of
record is
triggered by the
dog (M) of
the turntable
(7) and by
the
shut-off lever
(A) in Fig.
17.
In
the shut-off
range for
records
116— 122 mm
in
diameter, the
shut-off lever (A)
approaches
the dog
under control
of the
shut-
off bar
(179).
(See Fig. 17
a). The dog
(M)
engages with
lever (A),
which
will displace
the cam
wheel (161)
from its zero
position
and make it
engage with
the pinion
(PR) (Fig.
17 b). The
main
lever (177)
returns the
tone arm
that can then
lower itself
on its
support.
When the
cam
wheel runs up to
its
zero-engagement
position,
the
nose
(186) of the
shift arm can
run into
the recess
left in the
cam
wheel and
operate the power
switch (135).
8

Stop Circuit
When
you adjust the
lever
(48)
to
STOP, the srart
angle (1911 is
released and pulled
towards the cam
wheel by tension spring
(1921.
As a result, the
shut-off lever is
brought within the range
of the dog
(M) on the pinion (PR)
of the turntable and the
cam
wheel (161) becomes
driven. The reversing
lever remains in
its stop position.
Adjustments
Tone Arm Set -down Point
Slightly pprey up the
nameplate "Dual" at its lower left
corner
and swivel lt outwards
(Fig. 19). The now accessible
opening will
show one of the adjusting screws.
Set -down Point for 30 -cm Records
Adjust the
speed selector 1181 to
the "45" position and
correct
adjustment with a screwdriver.
If the stylus sets down too far
on
the record inside,
rotate the adjusting screw
clockwise. If the stylus
is lowered outside the 30
-cm record, rotate the screw
counter-
clockwise.
Set -down Point for 17 -cm
Records
Adjust the
speed selector (181 to the "33"
position and rotate
the screw as above described for adjustment.
Shut-off Point
In the shutting-off range for records
116 — 122 mm in diameter,
the
excenter (S) on segment
(200)
(Fig.
18) can be used to vary
the shut-off point.
Fig.
18
Defect
Turntable
does not start.
Cause
a) Belt is
not in
place.
b)
Motor is not
powered.
c) Motor
pul ley has
come
loose.
Tu rntable
speed unsatisfac- a)
Motor
pulley does
not
tory.
comply with
mains
frequency.
b)
Belt sl ips on
motor pul ley or
turntable.
c) Excessive
bearing
friction.
Fig. 19
Tone Arm Lift
Height
This height for the auto
mode can be adjusted with
the aid of
the setting sleeve
(156). Pull the mains
plug. Disengage the tone
arm. Rotate the cam
wheel (161) out of its zero
position until
the tone arm has
reached its greatest lift height.
The height
above the tone arm
support stop should
be about
7 mm as shown in Fig.
20. If necessary, rotate
the setting sleeve
(156) clockwise or
anticlockwise as required.
Fig.
20
Repair
a)
Mount the belt.
b) Check switch base and mains
plug.
c) Tighten
it.
a) Exchange it.
b)
Clean all contacting
surfaces of belt and
pulleys, if necessary
replace the belt.
cl Clean and relubricate
the bearings.
9

Defect
Tone arm
improperly lowered
(too fast or not on
record).
Acoustic
Feedback
Rated speed borders pitch
adjustment range.
Replacement parts
Cause
Shock-absorbing action of
sil icone
oh l in
lift
tube
is ex-
cessive or
insufficient.
a)
Chassis parts
(e.g.
connecting
leads)
hit bench
cutout.
b)
Connecting
leads are
strained.
Positioning of
belt pulley
(1) is
inaccurate.
Pos.
Part.-No.
Oty.
Description
1
214 054
1 Washer
4 220 213
1
Centering piece
6
244 460
1
Turntable I ining
7 246
738 1
Turntable
cpl.
8 234
428 1
Carrier cpl.
9
210 472 2
Fillister head screw
M 3 x 4
10 210 586
1 Washer
3.2
11 232
086 1
Retaining
spring
12 234 430 1
Locking
rail cpl.
13 232 087
1
Retaining spring
14
210 194
1
Grip ring
15 246 084 1
Flat belt
16
234 912 1
Control
knob
17 232
078 1
Bearing bush
18
234 910
1 Speed
lever
19 237 222 1
Speed
cover
20 213
260 3
Grooved drive
stud
21
237 414 3
Transport
lock
22
246 740 1
Built-in plate cpl.
23 237
226 2
Spring suspension
cpl. (motor side)
237 227 1
Spring
suspension cpl. (pick
-up arm
side front)
237 228
1
Spring suspension
cpl. (pick -up
arm
side rear)
24
230 529 4
Threaded
coupling
25 236 710 2
Pressure spring
(motor side)
236 711 1
Pressure
spring (pick -up
arm side front)
236 712 1
Pressure spring
(pick -up arm
side rear)
26
200 723 4
Rubber absorber
27
200 722
4 Pot
30 246 741 1
Pick up head cpl.
31 237 223 1
Contact plate cpl.
32
236 242
1 Fixture
TK
24
38 210 472
1 Fillister head screw
39 234 599
1 Reset cam
Repair
Demount the lift
plate (15) , remove
the control stud
(154), lock
washer (155), and setting sleeve
(156)
with
lock washer; remove
lift bolt
and pressure spring, clean lift tube
and lift
bolt. Evenly
apply WACKER
SILICONE 'Oft AK 500 000 to the lift bolt.
Reassemble the
parts.
al Al ign cutout by installation instructions.
b) Loosen or extend the cables.
Adjust knob (16) to mid position; adjust hex. nut
(110) to rated
speed
(clockwise adjustment will increase the speed and
vice versal .
Safety regulations
Servicing of electronic
equipment
should be performed
only by
authorized service personnel.
During service
the unit has to be
operated with an
isolated trans-
former.
Safety
requirements (e. g. VDE
0860 H) haveto be
strictly observed
during repair.
In
order to
not reduce safety,
the original design
of the unit should
not be
changed, e. g. cover
plates, mechanically
secured wiring,
tracking and creepage distance in air etc.
Use only
factory replacement
parts which must be
reinstalled per
original design.
Upon completion of
repair make shure that
all accessible and
conductive parts do not carry
line voltage.
Pos. Part.-No. Oty.
Description
40
240 069 1 Adjusting
screw
41 210 643
1 Washer
4.2/12/1
42 210
366 1 Hex nut
43 234 635 2 Counter nut
44 230 063 1 Grub screw
45 240 962
1 Frame cpl.
46 234 634
1 Grub screw
47 234 635 2
Counter nut
48 244 785 1 Switch
lever
49 246 744 1 Support cpl.
50 246 743 1 Pick up arm cpl.
51 240 964 1 Weight
52 210 147 1 Locking washer
4
53 238 666 1 Mandril
54 233 744 1 Stay
55 242 098 1 Bearing frame
56 236 160 2 Support plate
57 239 565 2 Fillister head screw
M 2.5 x 3
58
241 447 1 Clamping screw
59 238 201 1 Thread
plate
60 238
202 2 Locking screw
61 237
672 1 Groove drive stud
1.4 x
6
62 238 623 1
Pointer
63 242 099 1 Bearing cpl.
64
-2-343 - 5te- 1 Spring casing cp1.226 Q6 ) 7
65 237 563 1 Washer
66 237 564
1 Bearing screw
67 246 746 1
Rear cover
68 200 444
6 Spring washer
69 240 151 1 Rotary knob
70
246 747 1
Front cover
100 210 146 3 Locking washer 3.2
101 232
096 1 Svvitch lever
102 232 071 1
Clip spring
103 232 094 1
Connection part
104 232 079 1
Shouldered nut
10

Pos.
Part.-No. Qty.
Description
105 232 097 1 Belt wheel II
106 240 035 1
Washer
107 210 607 1
Washer
3.2/10/0.5
108 210 362 1
Hex nut
M3
109
232 076 1 Toothed belt
110 244 104 1 Hex nut
M3.5
111 241 641 1 Control curve
112 241 642 1 Belt wheel 1
113 241 644 1 Abutment
114 233 777 1 Tension
spring
115 232 615 1
Pressure spring
116 234 453 1 Drive roller
50 Hz cpl.
234 454 1 Drive roller
60
Hz cpl.
117 233 137
2 Grub screw
M 2.5 x 3
119 210 366 2
Hex nut
M4
120 210 480 1 Fillister head
screw
M 3 x 6
121 210 609 1
Washer
3.2/10/1
122
241 328 1 Screen plate
, 123 232
841 1
Buffer
124 232 840 1
Insert plate
125 241 570
1 Upper bearing stay
126 209 939
1 Rubber bush
127 241
569 1 Stator
110/220V
128
233 815 1 Fillister head screw
M 2.5 x 18
129
241 571 1 Anchor
130
241 572 1 Lower bearing stay
131
210 525 2 Fillister head screw
M 3 x 25
132
242 076 1 Motor SM 860-1 cpl.
110/220V
133
234 592 1 Connecting rod
135 242 580 1 Mains
switch
(10
nF)
242 583 1 Mains switch (68
nF)
136 236 335 1
Slide
137
200 444 1 Spring washer
138 233 012
1 Switch panel
(10
nF)
236 605 1 Switch panel
(68
nF)
139 230 148 1 Switch
angle
140 239 732 1 Tension spring
141 219 200 1 Catch spring
142 241 883 1 Capacitor
10 nF/250 V
230 355 1 Capacitor
68
nF/250 V
143 242 095 1 Cover
144 210 498 1
Fillister head screw
M 3 x 28
145 231 079 1 Cable clamps
146 232 987
1 Shurt circuiter
147 239 562 1 Soldering lug
148 210 472 2 Fillister head screw
M 3 x 4
149 232084 1 Screen sheet
150 210 472 2 Fillister head screw
M 3 x
4
151 244 706 1
Holdering rail
154 216 844 1 Control nipple stud
155 210 143 2 Locking washer
156 218 318 1 Adjustable adapter
157 210 472 2
Fillister head screw
158 246 749 1 Lift plate cpl.
161 236 912 1 Curve wheel cpl.
162 200 522 1 Catch spring
163 210 366 1 Hex nut
M4
165 218 155 2 Hex screw
M 4 x
6
166 246 748 1 Bearing bridge cpl.
172 210 587 1 Washer 3.2/7/1
173 234 677
1 Bearing bracket
174 210 667 1
Washer
5.3/10/0.5
175 234
676 1 Screw bolt
176 210 147
1 Locking washer 4
177 236
914 1 Main lever
178 211 718 1
Ball
179 234 668 1 Stop rail
180 234 558 1 Ball bed
181 210 472 2
Fillister head screw
AM 3 x 4
182 210 362
1 Hex nut
183 234 544 1 Groove bolt
184 210 586
1 Washer
3.2
185 236 950 1
Stop bush
186 234 542 1
Switch arm
187 229 686 1
Tension spring
188
210 144 1 Locking
washer
1.9
Pos.
Part.-No. Qty.
Description
189
234 579 1
Switch off lever
190
210 145 4 Locking
washer
2.3
191
234 545 1 Start angle
192 229 698
1 Tension spring
193 244 784
1 Switch crank
194 245 249 1 Switch over
lever
195 210 146 3
Locking washer 3.2
196 234 598
1 Connecting rod
200
242 101 1 Segment
201 234 026 2 Grub screw M 2.5
x 4
202 210
362 2 Hex nut M3
203 223 777 1 Control nipple stud
204 240 060
1 Slide rail
205 201 187 1 Sliding
washer
206
210 145 4
Locking washer
2.3
207 244 709 1 Switch on lever
208 210 641 1 Washer
4.2/10/1
209 210
362 1
Hex nut
M3
210 234
548 1
Roller
211 210
143 1
Locking washer
1.5
212 218
591 1
Tension
spring
213 201 184
1
Adjusting washer
215
244 331
1
Skating lever
216
210 146 3
Locking
washer
3.2
217 237
543 1
Rubber bush
218
237 541
1 Grip
rod cpl.
219
240 063
1
Lifting piece
220 210
353 1 Hex
nut
M2
221 240 066 1
Bearing plate
222
210 469 1
Fillister head screw
M 3 x 3
223
234 674 1
Braking piece
224 210 587 1
Washer
225 234
588 1
Adjusting lever
226 230 087
1 Screw
bolt
227 210 146 3
Locking washer
3.2
228
210 145 4
Locking washer
2.3
229 210
586 1
Washer
3.2/7/6.5
230
232 595 1
Leaf spring
231 234
593 1
Reversing angle
232 203 477 1
Washer
2.7/8/1
233
210 353 1
Hex
nut
M2
234 232 599 1
Latch
235 210 146 3
Locking washer
3.2
236
239 915 1
Square plate
237 210
472 1
Fillister head screw M 3 x 4
238 210 586
1 Washer
3.2
239 245 247 1
Screw bolt
240 239 810 1
Locking spring
241 229 362 1
Guide bearing
242 210 145 4
Locking washer
2.3
243 243 621
1 Stroboscope prism
244 241 574
1 Stroboscope housing
245 225 321
1 Glow lamp
246
241 674 1
Switch plate
C
1 225 332
1 Capacitor 68
nF/400 V/10 %
C 2 224 886
1 Capacitor 47 nF/250 V/20 %
D 1 225 247 1
Diode
BY
183/30
R 1 232 401 1
Resistor
12 k0hm/0.25 W/5 %
R
2 232 402 1
Resistor 22 k0hm/0.125 W/5 %
247
241 675 1
Cover
248 210 469 2 Fillister head screw
M
3 x 3
249 209 436 3
Tab receptacle
250 209 424 1
5 -pole plug
251 207 303 1 Phono pick up cable
cpl.
252 207 301 1 Phono pick up cable cpl. (Cynch)
253 209 425 1 Cynch
plug white
254
209 426 1 Cynch plug bleck
255 214 602 2
AMP receptacle
256 232 996 1
Mains lead cpl. Europe
257 232 995 1 Mains lead cpl. America
214 120 1
TA fixing material
***
245 464 1 Operating instructions
*** 245 529 1 Operating instructions
UAP
**" 241 278 1
Shipping canon CS
11
Parts not
illustrated Subject
to change!

Fig.
21
Exploded
view 2
al
12

1 -
-
Fig. 22 Exploded view 1
'Slum.
4
-
13

Lubrication
All bearings and friction points
vvere
adequately lubricated in the
factory. The most 'important
bearings are of the oil-preservation
type, so no lubrication is
necessary
in the first tvvo years of normal use
of the
record player.
Use lubricants sparingly. Make sure
no lubricant spoils the belt and
pu I
ley surfaces, which would cause
slipping. Avoid finger contacts with
these surfaces for the same reason.
Unspecified
lubricants may be-
come chemically decomposed.
To
avoid resulting failures,
we re-
commend
application of the follo-
wing lubricants at
the points
identically numbered in Fig.
23
and 24:
A
Renotac no. 342
adhesive oil
BP
Super V
iscostatic
10
W/30
Shell Alvania
no. 2
lsoflex
PDP 40
AK
500 000
Silicone Oil
Molykote
Fig. 23
Fig. 24
Dual
Gebrüder
Steidinger
7742
St.Georgen/Schwarzwald
920
538-2 5.2/0878
Printed in
Germany by Dual