Dual CS 731 Q Operating Instructions

Unpacking and setting up
Please also observe the information contained in the packing instructions.
After opening the box place aside the polystyrene insert with
the complete accessories. Remove the console with the inserted
record player from the box and put the unit in the place inten-
ded for it. First of all read the instructions slips on the unit
and then remove these afterwards with the packing films. We
recommend you keep the original packaging in case you need
this later on for further transport.
To release the transport locking screws (Fig. 1) turn these in
clockwise direction until they slide down approximately 15 mm
and then tighten these by turning them further in clockwise
direction. In this way, the record player is spring mounted in
playing position (B).
A B
Now place the platter directly onto the motor axis. Remove
the
tonearm
counterbalance
from
the
polystyrene
insert
and
place the stem of the counterbalance, after releasing the locking
screw
(2),
into
the
opening
intended
for
this
at
the
back
end
of
the tonearm. At the same time, the triangular recess on the stem
should point downwards (Fig. 5). Balancing as well as setting
of
stylus
pressure
and
anti-skating
which
is
now
necessary
are
described in more detail on page 18.
Please refer to the separate data sheet for the stylus pressure of
the cartridge already inserted in the unit.
Now connect to the reproducing amplifier and place the mains
lead into the socket. Please pay attention to the separate infor-
mation in these instructions.
Subsequent transport
The platter lies on the motor axis of the electronic central drive
without additional locking and must be removed before each
transport. In addition, the transport locking screws must be
screwed loose in anti-clockwise direction, pulled upwards and
secured by further turning (A). The tonearm counterbalance
should be removed.
Make sure that the tonearm is locked and that the stylus pro-
tection is swivelled downwards.
Ifyou intend to dispatch your unit, make sure that the packaging
is impeccable and, if possible, use the original packaging.
Note: After each transport, the unit should be started once with
the tonearm locked for the purpose of automatic adjustment
of the automatic shut off. Press the START button (12) for
automatic activation of the start function.
Connection to the AC mains
The unit can be connected to alternating current 50 or 60 Hz,
110 — 125 V or 220 — 240 V and is normally set to 230 V.
Y our record player can be run on mains frequencies of 50 or
60 Hz without conversion of the motor.
Conversion of the mains voltage should always be carried out
by specialist dealers or authorized Dual service workshops.
Connection to the amplifier
Connect
the
cartridge
lead
equipped
with
RCA
(cynch)
plugs
to
the
phono-magnet
input
of
the
amplifier
(black
=
right
chan-
nel,
white
=
left
channel).
Connect
the
one
wire
equipped
with
the
cable
bracket
or
screw
it
under
the
clamp
marked
"GND"
on
the
rear
of
the
amplifier.
16
So that your receiver or reproducing amplifier be designed for
DIN jacks, have your specialist dealer adapt this by replacing
the complete cartridge lead.
Cartridge lead with DIN jack 1.10 m long.
Order number 207 303.
Dual cartridge leads can also be equipped for plug-in into the
turntable. i
Please do not forget to connect the chassis lines of the right
hand (green) and left hand (blue) tonearm lines to the chassis
of
the
unit
when
converting
this
from
cynch
(RCA)
to
DIN
jacks.
Dust cover
In
order
to
place
the
dust
cover
in
position,
turn
the
unit
round
so
that
the
special
hinges
are
in
front
of
you
and
are
easily
ac-
cessible.
First
of all
make
sure
that
the
insert
brackets
on
the
hinges,
into
which
the
cover
will
be placed,
are
in
correct
posi-
tion
before
you
place
the
dust
cover
in
position
parallel
to
the
brackets
and
push
this
in
fully.
In this position (opening angle approx. 600) the cover can also
be removed at all times.
Should it be necessary to correct the balancing moment (elastic
force which keeps the cover above the console), this can be
carried out by turning both knurled screws. Please adjust both
screws equally. In most cases, correction by half a screw turn
each will be sufficient.
Setting up and operation
The platter turns if the tonearm is lifted from the post and
placed onto the tonearm rest beside the tonearm post. In this
tonearm position, the record placed onto the platter can be
cleaned of dust (e.g. with anti-static cloth etc.).
Please select the correct platter speed (33 1/3 or 45 rpm), un-
lock the tonearm and tilt the stylus protection upwards.
1. Automatic start
The unit's automatic setting down system is designed for 30 cm
and 17 cm records (these are the only record sizes manufactured
nowadays) and is coupled to the switchover mechanism of the
platter speeds.
In the case of the platter speed 33 1/3 rpm, the tonearm sets
down on the run-in groove of 30 cm long play records; if the
45 rpm speed is selected, this sets down analogously in the
run-in groove of 17 cm records (singles).
Press the START (12) button for activation of the start func-
tion. The tonearm moves over the record, lowers itself slowly
and carefully places the stylus into the run-in groove of the re-
cord.
2. Manual operation
a) Place the control lever of the cueing control (7) in position 7
or press the LIFT (11) button.
b) Manually replace the tonearm above the part of the record
you wish to hear.
c) Place the control lever in position £ by lightly pushing the
lever (7) or by pressing button (11).
Note
The cueing control is superior to the automatic start mechanism.
In the case of cueing control position Y and automatic start, the
tonearm moves into setting down position. The tonearm is then
lowered by moving the control lever or by pressing the LIFT
button.
At the same time, the lowering speed can becontinuously varied
with the adjusting wheel (5) (Fig. 3):
4 = slower
444 = faster
With the cueing control in Y position, the height of the stylus
above the record can be varied by approximately 6 mm by tur-
ning the adjusting screw (9).
3. Record is to be played several times or once again from the
beginning
Press the START button (12).
4. Pause e
Place the cueing control in Y position. When this is lowered the
record continues to play. The last few notes played before the
pause are repeated.
5. Switching off
Press the STOP button (13). The tonearm returns to the post.
The unit switches itself off.
6. Automatic continuous play
Place the rotary button (6) in CO position. After the record has
finished playing, the tonearm lowers itself once again into the
run-in groove of the record. The record is played once again.
This is repeated until the switch-off function is triggered off
by depressing the STOP key or the rotary knob (6) is once
again placed in the position for single play.
Note
In the case of records with unusual diameters, for example
25 cm records, the unit is operated manually. See ''2. Manual
operation”.
After the record has been played, independently of whether the
tonearm was placed manually onto the record or whether the
unit was started automatically, the tonearm returns to its initial
position automatically and the unit is also switched off auto-
matically. After use of the record player, it is recommended to
lock the tonearm once again and to tilt down the stylus protec-
tion.
Technical information
Cartridge and stylus
Please refer to the “Information on your unit's cartridge”, en-
closed with these instructions for use.
Fitting a 1/2” cartridge (see page 3)
With extremely light ULM cartridges (ultra-low-mass), your
Dual record player develops outstanding reproduction capabili-
ties. In this case, the characteristics of the tonearm are so excel-
lent that considerably heavier 1/2" cartridges also function
under optimum conditions. Proceed as follows if you wish to
fit a 1/2” cartridge.
1) If there is one on your unit, remove the removal prevention
screw (Fig. 6/'’S’’).
2) Swivel the tonearm lift (15) backwards and remove the ULM
cartridge from the holder (Fig. 7).
3) Slide the short holder plate (Fig. 8) approximately 5 mm
backwards and lift it off.
4) Place the long holder plate onto the tonearm (Fig. 9) in
such a way, that it lies on the surface and the back and is
pointing upwards at the front at an angle of approximately
300. Shift the holder plate so that its large opening lies
above the round guide lug in the tonearm. Now carefully
swivel the holder plate into horizontal position and tightly
pull it forwards until you can feel it clicking into position.
5) Attach the 1/2” cartridge with the enclosed accessories to
the cartridge holder. This has been fitted correctly if the
stylus — viewed from above — is in the V-shaped recess of
the enclosed fitting template. Viewed from the side, the
stylus must be in the area of the rectangular recess (Fig. 10).
6) Connect the cartridge holder's connection to the cartridge.
The connections have color codes:
red R right hand channel
green RG right hand channel chassis
blue GL left hand channel chassis
white L left hand channel
7) Place the cartridge holder at an angle from below onto the
tonearm head, press it fully backwards and upwards until
you can feel it clicking into position. Now carefully swivel
the tonearm lift forwards and, if you wish, lock the cartridge
and the stylus to prevent removal by screwing the described
screw.
Depending on requirements, screw on one or both of the
enclosed disk-shaped additional weights to the rear of the
tonearm counterbalance (1). Turn the smaller thread of the
special screw into the thread of the counterbalance. Screw
one additional weight onto the screw — with the knurled
marking on the outside — if the weight of the fitted cartridge
is no more than approximately 6.5 g and a second one if it
is heavier.
9) Now once again carefully balance the tonearm — as described
in the section on “Balancing the tonearm”.
8
Fitting cartridges with recess-type cartridge assembly
Cartridges with a Dual recess-type cartridge assembly can be fit-
ted in the same way as 1/2” cartridges. The cartridge holder
(Fig. 11) is designed to permit fitting of such cartridges without
an additional attachment screw.
Removal prevention
Thanks to an ingenious device, the cartridge and stylus can be
easily safeguarded against unwanted removal. For this purpose,
the self-tapping screw provided with the accessories is screwed
into the hole on the left hand side of the shining pin on the
holder plate (Fig. 6). At the same time, make sure that the tone-
arm lift (15) is vertical to the cartridge head center.
Stylus
The stylus is subjected to natural wear and tear during normal
playing. Therefore, we recommend you occasionally check the
stylus and, in the case of diamond styli, this should be carried
out after approximately 300 playing hours. Your specialist dealer
will be pleased to do this for you free of charge. Worn or dama-
ged (splintered) styli chisel the modulation from the grooves
and destroy records. Therefore, only use as replacement the
stylus types recommended in the technical data of the cartridge.
Copied styli result in audible quality losses and increased wear
and tear of records. Please remember that, for physical reasons,
the stylus holder with the diamond stylus is extremely fine and
must therefore be necessarily sensitive to impacts, shocks or
uncontrolled movement. In order to have the stylus checked,
take the complete cartridge holder (removal from the tonearm
is described above) to your specialist dealer.
Setting the tuning anti-resonator
Your Dual record player has a tuning anti-resonator which per-
mits optimum adaption of the tonearm to the cartridge being
used. Not only Dual ULM cartridges but also conventional 1/2"
cartridges with an net weight from 2 to 9 g can be optimally
adapted with this device. For the ULM cartridge fitted in the
factory, you can find the value to be set in the data sheet of the
cartridge which is enclosed with these instructions for use.
However, this can also be determined from the following dia-
gram in the same way as for 1/2" cartridges.
As the example of the ULM 60 E shows, you select the own
weight of the cartridge on the horizontal scale, move vertically
upwards until you find the corresponding line for the com-
pliance and you project this point to the vertical scale from
which vou can then read off the optimum tuning value.
In order to set the tuning anti-resonator, turn the scale ring in
clockwise direction until you see the determined scale value
above the pointer (Fig. 4).
17

Dual CS 731 Q Specifications

General

Brand	Dual
Model	CS 731 Q
Category	Turntable
Language	English