Dual 506 User manual

Service
Manual
\()
Technical data
Measured values
Current
Line
Voltage
Drive
Power
consumption
Sterling
Time
Power
Consumption
Dual
506
Edition
December 1979
typical
values. Rumble and wow and
flutter values obtained
with test record.
AC 50
or 60
Hz, changeable by changing
motor pul ley
110 — 125 V or
220 —240 V,
changeable
Dual 8 -pole
synchronous motor: precision flat
belt for flyvvheel drive
approx. 10
watts
(to
each nominal speed) approx. 2
seconds at 33 1/3 rpm
at 220
V, 50 Hz:
approx. 75 mA
at 117
V,
60 Hz: approx. 140
mA
Platter
Non-magnetic,
detachable, 1.1 kg, 304 mm
Platter speeds
33 1/3
and 45 rpm
Pitch Control Variation
at
both platter speeds.Adjustment range at 33 1/3
rpm approx. 1 semitone (6 %)
Speed control (monitoring)
with stroboscope for platter speeds 33
1/3 and 45 rpm, adjustable to 50 or 60 Hz.
Total Wow and Flutter
DIN
± 0.07 %
WRMS ± 0.04 %
Rumble
Unweighted 48 dB
(according to DIN 45 500)
Weighted
70
dB
Tonearm
Torsion-resistant tubular aluminum tonearm in
fourpoint gimbal bearing
Tonearm Bearing Friction
vertical 0.07 mN
(0.007 g)
(related to
stylus tip)
horizontal
0.15 mN
(0.015
g)
Stylus Pressure
from 0 - 30 mN (0 - 3 g) infinitely
variable with 1 mN
(0-
1.5 g)
operable from 5 mN (0.5 g) stylus pressure up
Cartridges
with
1/2
inch screw-type attachment. These can be fitted with the special accessories
no. 262
186 which c,an be obtained from trade dealers. Adjustable
overhang 5 mm.
Weight
approx. 4.1 kg
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Contents
Page
1
Specification
2
Audio connection
diagram
3
Motor
and drive
3
Speed
selection
3
Turntable
3
Belt
3 To replace
the motor pulley
3 Tuning to the
Pitch of Tone Level
4
Stroboscope
4
Tone arm
with bearings
4
To remove the
tone arm or the spring housing
4
To remove tone arm
complete with bearings
4
To adjust the tone arm bearings
5
Fitting a 1/2 inch cartridge
5 Tone arm lift
5 To adjust the tone arm liftheight
5 Anti-skating device
5
To replace the lift plate
5 Starting
and
shutting-off
6
Adjustments
6
Segment
6
Pawl
6
Power switch
6
Troubleshooting
6
Tone arm head not parallel to turntable
6
Turntable does not start
6
Turntable speed
unsatisfactory
6
Stylus slips
from record groove
6
Tone arm improperly lowered
6
—9
Replacement
parts with Exploded view
10
Lubrication
NOTE: The
item numbers
referred to in
the text are
identical
with those
in the
illustrations, the
exploded voews, and
in the
parts lists.
Fig. 1 Pick -up
connection
diagram
Kontaktplatte
Contact
plate
Plaque
de contacts
/ / rot
red rouge
rechter
Kanal
Kurzschl ießer
Cynchstecker
DIN-Stecker
5-polig
right channel
Muting
switch
phono plug DIN-plug 5 pin
Canal droit
Court-circu
iteur fiche cynch fiche DIN 5 pöles
/
1
I I
I I
grün / green / vert
schwarz / black /
negro
1.
blau /
blue /
bleu
/ \
weiß /
white / blanc
linker \
Kanal
left channel
Canal
gauche
•
•
Masse draht
Mass
lead
Mass cäble
2

Fig. 2
Motor and
Drive
Turntable
and
mechanism are
driven by the
motor 132
in
(Fig. 16). The
shaded-pole motor
runs
vibration-free in
radially
elastic
mounts and has
an extremely
low
magnetic
leakage.
The motor
speed is
independent
of voltage,
temperature, and
load
variations. lt can
only fluctuate
with the
mains
frequency.
Two
motor
pulleys adapt
to the mains
frequency
of 50 Hz
or
60
Hz
(see pulley
116 in
Fig.
2).:
Part
no.
234 453
pulley
for 50
Hz
Part no.
234 454
pulley
for 60
Hz.
The
driving force
is
transmitted to the
turntable by the
belt 15.
Speed Selection
To
adjust the turntable
speed to 33
1/3 or 45 rpm,
the belt is
adjusted to the
one or the
other step of
the motor
pulley 116
(see Fig. 3).
This is done by
operating
the knob 16
that will shift
the
change-over lever
into the desired
speed
Position through the
lever 101 and
the spring
lever. As long as
the platter is
turned
off,
the change-over
lever is blocked
by the bar 12
and the speed
is
only
pre-selected. As soon as the
record player is
turned on
and
the turntable 7
starts running,
the blocking bar
12 will
release
the change-over
lever. The lauer
will then shift the
belt
15 to the
one step of the
motor pulley 116 that
corresponds to
the desired speed.
Tumtable
The
turntable 7 is fixed to
the turntable
bearing tube by
lock tab
134.
To remove the
turntable, lift its
top layer through
one of
the cutouts and
rotate the turntable so
that the recess is
above
the motor pulley.
Pull the belt 15 from
the pulley 116 and
place
it onto the
turntable. Rotate the latter
further until the
cutout is
above the lock
tab 134. Slacken the screw
133. Press the holding
bar 134 outwards and remove the turntable 7.
Belt
To replace
the belt, first remove the turntable
as above described,
then
remove the belt 15. Place the nevv belt on
the pulley part of
turntable 7.
NOTE: the
ground
(mat)
side
of the belt should face the
pulley.
Install the turntable. Place
the belt onto the motor pulley 116.
To Replace the
Motor Pulley
1. Remove belt 15 from pulley 116 and remove
the turntable.
Remove the
toothed belt 109.
2. Disengage the tension spring 114 from the shield 122.
3. Unscrew the hex. nut 110. Remove the set cam
111, belt
pulley 112, and
counter bearing 113.
4. Slacken
the grub
screws 117
and slide
off the
motor pulley
116. Place the replacement pulley onto motor shaft. Remove
the taper sleeve. Pay
attention to the internal distance spring.
Position the motor pulley at proper height above the mount-
ing plane — see Fig.
3—
and uniformly tighten the grub screvvs
117. Place the
taper sleeve into the motor pulley 116.
5. Mount the counter bearing 113, the belt pulley 2 112, and
the setting cam 111, tighten with hex. nut 110. Replace ten-
sion spring 114 and toothed
belt 109. Mount the turntable 7.
Place
belt 15 onto
motor pulley 116.
6. To adjust the rated
speed: adjust the knob 16 to its mid
position. Slacken or
tighten the hex. Nut 110 to achieve the
rated
speed.
Tuning to the Pitch of
Tone Level
This tuning feature is independent of the
power and controls
both turntable speeds. For 33 1/3, the control range is max. 6%
or about 1
seminote.
113 8
12
22
-117
------116
Fig. 4
110
111
112
109
114
117
119
115
Fig. 5
r
4
113
116
117
8
12
110 -125V 1
30
sw
3

Rotate
the knob 16 to move the belt pulley
112. This rotary
motion is transmitted by the toothed belt
109 to the belt pulley 1
105, see Fig. 2. As a result, the
counter bearing 113 and the
taper sleeve of the motor
pulley 116 are shifted up or down.
As an effect of the taper sleeve,
the motor pulley diameter is
reduced or increased, respectively,
thus permitting to change the
rated
speed within the range of ± 3 %.
Stroboscope
Accurate setting of the platter speeds 33 1/3 rpm and 45 rpm
can be checked during play with the aid of the stroboscope de-
vice. On the platter 4
rotating at exactly the desired speed, the
lines
of the stroboscope appear to stand still. If the lines of the
stroboscope move in the direction of the platter rotation, the
platter speed is too high. If the lines move backwards the platter
is rotating more slowly than nominal speed. The four rows of
stroboscope marks on the edge of the platter, taken botton to
top, are for the following speeds:
331/3
rpmat 60 Hz,
331/3
rpm
at 50 Hz, 45 rpm at 60 Hz, 45 rpm at 50 Hz. Adjustment of the
platter speed is
carried out using the regulating knob 16.
Fig. 6
46
Fig. 7
55
39
41
207
Tone arm with Bearings
The light-weight torsion-resistant metal-tube tone arm has a uni-
versal 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 0.07 mN or
0.007 gr in vertical and
less than 0.15 mN or 0.015 gr in horizontal direction
referred to the stylus point.
This ensures particularly satisfactory tracking conditions. Before
adjusting the tracking force in compliance with the pickup
system used, the tone
arm to its balanced
position
while the
tracking-force scale is in the zero position. For coarse balancing,
shift the
weight 41, for fine balancing, rotate the weight.
The tracking force is produced by tensioning the helical
spring
located
in the spring case 63. The latter has a scale with marking
points permitting exact adjustment of the tracking force within
the range 0-30 mN (or 0 - 3 g).
To
Remove the Tone arm Complete
with Bearings
1. Mount the
record player in the servicing
fixture. Adjust the
tracking-force
scale 54 to zero. Lock the
tone arm 40 in
place. Remove the weight 41.
2. Adjust record player in head
position. Remove shield 158.
Unsolder the tone arm leads from
terminal strip 156.
3. Unhook the tension
spring 226 from the bearing bracket
224. Rotate bearing
part 195 through 90 0 degrees
and
remove it. Detach the setting bar 194.
4. Unhook the tension spring 214.
Remove lock washer 210
and skating lever 207.
5.
Remove
lock washer
217 and disk 216.
Detach the
shut-
off bar 215 from the segment 211.
6. Slacken the hex. nuts 213 and the screw 204.
Remove the
bearing 205 and
the segment 211.
7. Grip
the Frame 47 and the tonearm 40. Loosen the machine
screw 48 and take off the tonearm and frame.
To install the tone arm, proceed in reverse sequence; however,
make sure
the segment 211 is properly adjusted as described on
page 6.
To Remove
the
tonearm or the
spring
housing
1.
Secure the
unit in a
repair
stand. Turn the
rotary
turn switch
54 to the
zero
position. Lock
the
tonearm 40.
Remove the
counterweight 41.
2. Turn
the unit
over.
Remove the
screening
sheet 158
and
solder off
the
tonearm
connections at
the
connection plate
156.
Turn the unit
the right
way up.
3.
Remove the
fillister
head screw
55.
Remove the
rotary turn
switch
54 and the
washer 53.
4.
Loosen the
nut 54
and the
grub screw
46. Draw
the tone -
arm
40
complete with
bearing 56
from the
bearing
race 49.
The spring
housing 52
or the
tonearm 40 may
now be
changed.
Reassembly
involves the reverse
procedure.
213
To Adjust the Tone arm Bearings
211
Exactly balance the tone arm. Both bearings should have a small,
just perceptible
backlash. Proper adjustment of the horizontal
bearing is achieved if the tone arm can freely slide from the re-
cord Inside to
outside while the anti-skating
adjustment is 0.5.
Proper adjustment of
the vertical bearing is achieved when the
the carefully
kicked tone arm swings into balanced position.
Adjust the backlash by grub screws 46, 51 for the horizontal and
vertical
bearing, respectively.
194
215
4

Fig. 8
Fitting a 1/2
inch
cartridge
If
a cartridge with
1/2 inch standard
mount is to be
fitted, the
conversion
kit 44
Number
262 186
is
necessary. The proper
method of fitting is shown in fig. 8. .
Also the
decorative
cover should be
removed from
the
counterweight 41 and
should be fitted
with the
compensatory
weight to be
found in
the
conversion kit
44.
Anti-Skating
Device
To adjust the
anti-skating force, operate the
pointer
scale provi-
ded on the cover 62. Depending on this
adjustment, the non-
symmetric cam disk will guide the skating lever 207 out of the
tone arm pivot point. The
anti-skating force is transferred by the
tension spring 214 to the
segment 211 and, hence, to the
tone arm
40.
The factory adjustment is optimal for any stylus having a spheri-
cal tip radius of 15 Um or an elliptical tip radius 5/6 by 18/2211m.
These factory-adjusted vylues may be varied only in an
authori-
zed Dual service workshop using a Dual Skate -0 -Meter and a test
record.
Tone
Arm Lift
Move the lift
control bar 219 to the front
( V
)
or
LIFT posi-
tion;
this
will
rotate the lift cam 223 and
operate
the setting
bar 194 and the lifting bolt that will lift the tone arm. In
this
way the
tone arm
can be lifted
from
or
lowered on
any point of
the record except
in the shut-off range.
Move
the
bar 219
to the
rear
(
1) or
LOWER position;
this will
release the setting bar 176. The pressure spring
184wi11 return
the lifting bolt 185 to its operating position and the tone arm 50
will be loweredsofly, braked by the silicone oil in the lifter tube.
To Adjust the Lift
Height
Slightly rotate the adjusting
sleeve 181. The stylus should be
lifted from
the record by 5 to 7
mm.
To Replace the Lift Plato
1. Fasten the record player in the service jig and lock lt in place.
2. Adjust record player to
head position.
3. Detach the tension spring 226 from the bearing bracket,
224. Rotate bearing part 195 through 90 0 degrees and re-
move it. Remove
the setting bar 194.
4. Detach the tension spring 214, slaken the lock washer 217
and
remove the skating lever
207.
5. Remove lock washer 217 and disk 216. Detach shut-off bar
215
from segment
211.
6. Slacken hex. nuts 213 .and screw 204. Remove counter
bearing
205 and segment 211. Remove lock washer 188 and
disc 187,
disengage pawl 186.
7. Remove screw 183,
and remove lift plate assy. 182.
To replace
the
lift plate 182, proveed in reversed
sequence, but
look for proper
Adjustments
(described below) when you fix the
segment 211.
Starting and Shutting Off
Swinging-in
of the tone arm 40 causes rotation of segment 211.
As a result, pawl 164 and shift arm 172 will operate the power
switch 143 causing the motor 123 and turntable 7 to rotate.
After the record has been
played, the dog M of the turntable
(Fig. 11 b) will operate the shut-off lever 34. During play-back,
the shut-off bar
215 is dragged in proportion to the motion of
segment 211. For records 116 to 122 mm in diameter, the
shut-off lever 34 is
gradually pushed to
dog M by the shut-off
bar
215 in
the
shut-off range, see Fig. 10.
When the dog M con-
tacts the shut-off lever A, the c,arrier 37
will move the shift arm
172 to its zero
position and
the power switch
will
interrupt the
supply.
At the
same time
the lift
bar 218
coupled to
the shift arm
172 will operate
the tone arm lift and the tone arm 40
will
be
lifted.
1 I
1 1
Fig. 9
Fig.
10
5

Adjustments
Fig. 11
1.
Segment
a)
Lock the tone arm 50 in
place. Record player in
head
Posi-
tion.
Moreover, a play of 0.3 zo 0.5
mm should be provided
between the pawl
186 and the stop A
of segment 211, adju-
stable by slackening the
hex. nuts 213 and
shifting the
segment 211.
b)
The excenter S on segment
211 can be used to vary the
shut-
off point for records 116 to 122
mm in diameter.
2.
Pawl
Swing- in the tone arm 40. Make
sure there is a play of 0.2 to
0.5 mm
between stop pin B of the
shift arm 172 and the
deck
plate 22.
If necessary, adjust by
rotation of excenter E.
3. Power Switch
Disconnect mains
plug. Swing the tone arm
40 back to its
support. Power switch
143 must not turn
off before the tone
arm has reached a position
about 3 mm in front of the
support.
If necessary, adjust by
bending the shift arm 172.
Defekt
Turntable does not start
Cause
a) Belt
15 is not in
place:
mount
the belt.
b)
Motor 132
is not
powered:
check switch
base 142
and
mains
Plug.
c)
Motor
pulley 116
has
come
loose: tighten
it.
Turntable speed unsatis-
a)
Motor
pulley 116
not in
factory
compliance
with meins
fre-
quency:
exchange.
b)
Belt 15
slipping
on
pulley
116 or
turntable
7: clean
all
surfaces in
contact,
if
necessary
replace belt 15.
c) Rated
speed
maladjusted:
readjust.
Stylus slides out of
playing
groove
Tonearm does not set
down on record or lowers
too quickly
when operating
the cue control lever 190
Replacement parts
Steel ball 166 of
shut-off bar 166
mis-
sing
Excessive
or
insuffidient
damping
es a
result of
contamination
of the
silicone oil
in the
lift tube
Pos. Part.-No. Qty.
Description
e
CO
S
CO
Cs1
e
co
cr)
0.-CN NCNCNN
214 054
1 Washer
220 213 1
Centering
piece
263 375
1
Turntable lining
263 377 1
Turntable cpl.
234 428 1
Carrier cpl.
210 472
1 Fillister head
screw
M 3 x 4
210 586
1
Washer
3.2
232 086 1
Tension spring
237 220 1
Locking rail cpl.
240 000
1 Tension spring
210
194 1 Grip ring
246
084 1 Flat
belt
260 461
1 Control knob
239 270 1
Bearing bush
260
297 1 Speed
lever
263 378 1
Speed cover
213 260 3 Grooved
drive stud
3
Transport lock
9.31
' -
11'?
237
111
263
379 1 Built-in plate cpl.
237
226 1 Spring suspension
cpl. (motor side rear)
Repair
a) Belt 15 is
not in
place: mount the belt.
b) Motor
132 is not
powered: check switch
base 142 and meins
blug.
c)
Motor pulley 116 has
come loose: tighten it.
a)
Motor pulley 116 not in
compliance with
mains frequen-
cy:
exchange.
b)
Belt 15 slipping on pulley
116 or turntable 7:
clean all sur-
faces in
contact, if necessary replace belt 15.
c) Rated speed maladjusted: readjust.
Renew steel bell
Referring to page
remove cue control plate 182.
Remove ad-
justment bush
sleeve 181. Remove lift pin 185
and compression
spring
184. Clean lift tube and lift pin.
Smear lift pin evenly with
"Wacker
Silicone Oil AK 500 000 . Reassemble
components.
Pos.
Part.-No. Qty.
Description
237 227
1 Spring
suspension cpl. (motor right
front)
237 228 1
Spring suspension cpl.
(pick
-up arm
side rear)
237
229 1 Spring
suspension cpl.
(pick -up arm
side front)
24 230
529 4
Threaded
coupling
25 236 710
1
Pressure spring
(motor side rear)
236 711
1 Pressure
spring (motor side
front)
236
712 1
Pressure spring
(pick -up
arm side
rear)
236
713 1 Pressure
spring
(pick -up
arm side front)
26
200 725 4
Rubber
absorber
27
200 722 4
Pot
33
210 142 1
Locking washer
1.2
34
234 766 1
Throw-off lever
35
210 146 1
Locking washer
3.2
36 234
764 1
Friction plate
37 234 762
1 Carrier
39 260 428 1
Clamping screw
6

Pos.
Part.-No. Qty.
Description
40 264 020 1
Tonearm cpl.
41 .
-2Er3 - 2133' 1 Weight cp1.2 G 3 4 /` C
I
42 263 258 1
Tonearm head
cpl.
43 261
929 1
Tonearm head cpl.
44 262 186 1 1/2
inch
conversion kit
45 249 383 1
Counter nut
46 234 651 1 Grub
screw
47
263 081 1 Frame
cpl.
48 242 677
1 Fillister head
screw
M 4
x 8
50 246 884 1
Counter
nut
51 234 634 1 Grub screw
52 263
329 1
Bearing frame
53
261 798 1
Washer
54 248 989 1 Rotory knob
55 249 097 1
Raised
countersunk head screw
M 2.5 x 12
56
263 340 1 Bearing cpl.
57 263 331 1
Spring
housing
58 236 069 1 Fillister
head
screw
59 260 135 1 Lifting plate
60 210
597 1 Washer
3.2/8/0.5
61 262
294 1 Screw
B 2.9 x 6.5
62 263 380 1 Rear
cover
63 200
444 7 Spring washer
64 260 320 1 Cam disc
65 242 298 1
Washer
66 228 113 1 Washer
4.2/8/1
67 210 146 1 Locking
washer
68 260 328 1
Stroboscopprisma
69 263 381
1 Front cover
70 263 334 1
Tonearm rest cpl.
100 210 145 4 Locking screw
2.3
101 234
824 1 Switch lever
102 236 374 1 Clip spring
103 232 094 1 Connection part
104 232 079 1 Shouldered nut
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 I
113 241 644 1 Abutment
114 233 777
1 Tension spring
115 232 615 1 Pressure spring
116 234 453 1 Drive roller cpl.
50 Hz
234 454 1 Drive roller cpl.
60
Hz
117 233 137 1
Grub screw
M
2.5 x 3
118 210 366
3 Hex nut
119 210 480 1 Fillister head screw
M
3 x 6
120 210 609 1 Washer
3.2/10/1
121 241 328
1 Screen plate
122
232 841 3 Buffer
123 232 840 1
Insert plate
124 241 570 1 Upper
bearing stay
126 209
939 1 Sleeve
127 242 587 1 Stator
110/220 V cpl.
128 233
815 1 Fillister head screw
M 2.5 x 18
129 241 571 1
Anchor cpl.
130 241 572
1 Lower bearing stay
131 210 525
2 Fillister head screw
M 4 x 25
132
263 382 1 Motor SM 860/5
110/220V
cpl.
133 210 472 1
Fillister head screw
M 4 x 6
134 237 970 1 Holding raul
136 241
885 1 Capacitor
10 n
F/250 V
242 822 1
H F-coche
47 pH
137 237 236 1 Bearing
casing cpl.
138 236 759 1 Earthing
spring
139 210 515 3 Fillister
head screw
M 4
x 6
140 236
335 1
Slide
141 200 444 1 Spring
washer
142 233 012
1 Switch panel cpl.
143 242 581 1
Mains switch cpl.
144 239 732 1
Tension spring
Pos.
Part.-No. Qty.
Description
145 230 148 1 Switch angle
146 219 200 1 Catch spring
147 242 095 1 Cover
148 210 498 1 Fillister head
scFew
M 3 x
28
149 231 079 1 Cable clamps cpl.
150 214 602 1 Socket AMP
151 232 996 1 Mains
lead Europe
152 232 995 1 Mains lead USA
153 207 301 1
Phono pick -up cable Cynch
154 209 426 1
Cynch plug bleck
155 209 425 1 Cynch
plug white
156
237 238 1 Pick -up
connection plate
157 210
480 2 Fillister head
screw
M 3 x 5
158 236
080 1 Screen plate
159
210 480 2 Fillister head screw
M
3 x 5
165
236 950 1 Stop bush
166 209 357
1 Ball
3.2
167 232 104 1 Ball bed
168 210 469 2
Fillister head screw
AM 3 x 3
170
210 626 1
Washer
4.2/7/0.5
172 234
756 1
Switch arm
173 210 146 3 Locking
washer
3.2
174 210
196
1 Grip
ring
175 234 760 1
Engaging lever
176
234 799 1 Tension spring
177 237 785 1 Wire spring
178
210 586 1
Washer
179 234 759 1 Screw bolt
181
234
800
1
Adjustable adaptor
182
263
383 1
Lift
plate cpl.
183 210 472 1 Fillister head screw
AM
3 x 4
184
234 798 1 Pressure
spring
185 234 795 1 Lift bolt
186 234 786 1 Catch
187
210
643 1
Washer
4.2/12/1
188 210 145 4 Locking washer
2.3
189 234 789 1 Leg spring
190 210 146 3 Locking washer
3.2
191 210
469 2 Fillister head screw
M
3 x 3
192 237 969 1 Bearing angle
193
237
974
1
Pressure spring
194 263 721 1
Adjusting raul
195 237 975
1 Bearing segment
199 209 436 4 Flat plug
200
263 336 1
Stroboscope cpl.
201
249 092
1 Glow
plate
202 260 421 1 Glow lamp
203
210 469
2
Fillister head screw
M 3 x 3
204
203 475 1
Contersunk screw
M
3 x 8
205
242
615 1
Counter
bearing cpl.
207
244
331 1
Skating lever
210
210 146 3
Locking washer
211
263 384 1 Segment
212
201 184 1
Adjusting washer
213
210
362
2 Hex nut
M3
214
218 591
1 Tension
spring
215
234 807
1
Switch-off raul
216 201
187 1 Sliding washer
217 210
145 1 Locking washer
218
234
780
1 Lifting rail
219
240
893 1
Grip hub cpl.
220
237
543 1
Rubber bush
221
234
778 1
Torsion spring
223
234
777 1
Stroke curve
224
237 972 1
Bearing stay
226
233
710 1
Tension spring
227
210
469 2
Fillister head screw
M
3 x 3
232 209 424 1 5 -pole plug DIN
233 207 303 1 Phono pick -up cable cpl.
261 952 1 CK 28 walnut console cpl.
261 953 1
CK 28 agate black console cpl.
261 954
1 CK 28 agate brown console cpl.
227 986 1 CH 6 Cover
260 480 1 Operating instructions
261 833 1 Operating
instructions UAP
260 491 1 Shipping carton CS
7
Alterations
reservedl

Fig. 13
Exploded
view 2
0_
L _.
_ _
_.__J
r -
— 1
211,
Lid
8
Dual

Fig.
12
Exploded
view 1
0
PI
en"
0-
- 0
0
_c)
41111Pr
- _-8
- -0
4,
i
I____ _i
1)
I
I
1
7
1 1
1_
\,
e
1
i
1 i
9

Lubrication
All bearing and friction points of
the unit are
adequately lubricated
at the works.
Replenishment of oil
and grease is
only necessary after
approximately 2
years of normal
use of the record
player as the
most important
bearing points
(motor
bearings) have 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 flat belt,
drive pulley and
flywheel rotor,
otherwise slip will occur.
When using different lubricants,
chemical decomposition can of-
ten take place. To prevent lubri-
cation failure we recommend us-
ing the original lubricants
stated
below.
A
Dual
Renotac
No.
342
adhesive
oil
BP
Super Viscostatic
10
W/30
Shell
Alvania
No. 2
lsoflex PDP 40
Silicone oil
AK
500 000
Fig.
14
Dual Gebrüder
Steidinger
7742
St.
Georgen/Schwarzwald
920
642-2 5.2/1279
Printed
in
Germany by
Dual

ir r a
Service
Allgemeine
Information
General
Information
Information
gönärale
fJo
1/CS
506-2
Datum
-Date -Date Zeichen-Ref.-N/ref.
Gerate Nr.-Serial
number-
Gerat Model-Appared
Nu. dulappumil
28.03.83 KD/Ju
CS 506-2
Folgende Ersatzteile
unterscheiden sich von
506-1:
[he foilowing spare parts are
different
from
506-1:
Les
pidces detachees
suivantes se
different
de
506-1:
Pos.
Art-Nr.
Bezeichnung
Part.-No./ref.
Description/Designaton
1 248 876
Befestigungsscheibe
Securing disc/Rondelle de
fixation
2
270 410
Plattentellerbelag
kpl.
Turntable cp1./Tapis
du plateau
5
271
020 Plattenteller kpl. mit Belag
Turntable cpl. with matt/Plateau au complett
16 265
711
Regulierknopf
Regulating
knob/Bouton de
reglage
40 271 023
Tonarm kpl.
Tonearm
cp1./Bras de
lecture compl.
41 271 024
Gewicht
kpl.
Weight
cp1./Contrepoids
compl.
47 266
492
Rahmen
kpl.
Frame
cp1./Cadre compl.
57 269 796
Lager
kpl.
Bearing
cp1./Palier
compl. /c f
62
266
497
Abdeckung
hinten kpl.
Rear
cover/Revgtement arnere compl.
64 265
731 Kurvenscheibe
Cam
disc/Disque ä cames
70
270 418 Stütze kpl.
Tonearm rest
cp1./Support compl.
266 607
Konsole
CK 29
AS
Console CK
29/Console
CK 29

Dual
Service
Drucksachen -
Korrektur
Correction
Imprimös
rectification
Na
2/506
Datum -Date -Date
Zeichen-Fief.-N/ref.
Geräte
Nr.-Serial
number-
Gerät-Model-Appareil
No.
de
I-appareil
05.12.80
KDV I / Gr
506
Service
-Anleitung 506 —
dreisprachig:
Pos.
falsch
richtig
Bezeichnung
41
263
263
263 401 Ausgleichsgewicht
Service Manual 506 — trilingual:
Pos.
incorrect
correct
41
263 263 263
401
lnstructions
de service 506 — en
trois
iangues:
description
Counterbalance weight
Pos.
incorrect
correct designation
41
263 263
263
401
Contre
poids
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+u A Ar aP•A I A4