Dual CS 741Q - Abgleichanleitung; Display

Operation
Preparation
Turn the unit on by depressing the POWER switch (22). Set the
speed selector knob (10) to either 33 1/3 or 45 RPM, whichever
corresponds to the prescribed speed of the record to be played.
Pull up the stylus guard of the cartridge and release the tonearm
lock on the arm rest.
Please note that records and stylus can be damaged by dust
accumulation. We therefore recommend you clean each record
before it is placed on the turntable with a silicon cloth, antista-
tic brush etc. Also remove dust from the stylus tip gently with
a soft brush.
1, Automatic start
The record speed switch (10) is coupled to automatic indexing.
When set to 33 or 45 rpm, the stylus will set down in the lead-in
groove of 30 cm (12”) and 17 cm (7”) records respectively.
The selected speed will be illuminated on the front panel (17).
To begin play automatically, press the START button (15).
The platter will start rotating, and the tonearm will move to
the record and lower the stylus gently in the lead-in groove.
2. Manual Operation
a) Depress the LIFT pushbutton (13). Arrowmark a lights up.
b) Swing the tonearm over the desired position of the record
manually.
c) Depress the LIFT pushbutton (13) once more. The v arrow-
mark lights up and the tonearm is lowered on the record.
3. Interruption and replay
Press START button (15). (The tonearm will lift from the re-
cord, return to the lead-in groove and begin play again.)
4. Pause Function
To interrupt record play, depress the LIFT pushbutton (13).
Operation resumes by depressing the LIFT pushbutton once
more. The stylus will be lowered to approximately the same
position on the record where it was lifted off and the last few
music beats played before the pause are repeated.
5. Auto stop
Depress the STOP pushbutton (14). The tonearm will return auto-
matically to the arm rest and the turntable drive is switched off.
6. Continuous repeat
Press GO pushbutton (16). At the end of the record, the tone-
arm will automatically repeat play from the beginning until
either button (16) is pressed again or STOP (14) is pressed.
Note: To play records of non-standard size, such as 25 cm LP
(10”) discs or direct-cut records (e.g. 30 cm records to be
played with 45 RPM), your turntable must be operated ma-
nually. See Part 2 "Manual Operation”.
Regardless of operating mode (automatic or manual), the tone-
arm will return to the arm rest automatically at the end of the
record. Simultaneously the power will be cut off and the
platter stops rotating. We recommend to always lock the
tonearm to the arm rest and to swing down the stylus guard
when the turntable is not in use.
Tonearm lift
This function overrides the automatic operation. For example,
ifthe (4 ) arrow above the lift button is illuminated when start
is pressed, the tonearm will move to the record and remain
suspended over it until the lift button is pressed and the (w)
arrow is illuminated. Then the tonearm will descend and begin
play.
The tonearm's descent speed can be varied by adjustment con-
trol (5). See figure 3. Turning toward (—) slows descent speed,
turning toward (+) increases descent speed.
— = slower
+= faster
Stylus height over record when the tonearm is raised by lift
can be adjusted approximately + 6 mm by turning set screw (6)
when the tonearm is in the up position. (4 illuminated).
Pitch control
Each of the two standard speeds, 33 1/3 and 45 rpm, can be
varied + 6 percent by use of controls (18) and (20) respectively.
Press
PITCH
button
(19)
to
activate
the
pitch
control.
The
pitch-control
deviation
from
nominal
speed
will
be
shown
on
the
illuminated
indicator
(17).
The
word
PITCH
will
also
be
illuminated.
To
resume
QUARTZ-controlled
speed,
release
the
PITCH
but-
ton
and
the
word
QUARTZ
will
then
be
illuminated.
(The
previously
set
pitch-control
variations
will
remain
in
memory,
thus
allowing
repeated
comparisons.)
Strobe
patterns
on
the
platter's
edge
are
illuminated
by
a
spe-
cial
LED
(21).
See
Fig.
4.
The
sequence
of
light
pulses
equals
the
quartz-stabilized
frequency
which
controls
the
motor
speed.
This
indicator
functions
independently
of
line
frequency
and
does
not
require
several
stroboscope
patterns
for
different
speeds
and
line
frequencies.
Illuminated platter speed indicators
This device shows at both platter speeds the percentage
deviation from the original speed.
Tunable Acoustic Insulators
One
of
the
most
frequent
problems
in
turntable
operation
are
vibrations
of
various
origins,
being
picked
up
by
the
turntable
chassis
and
transferred
to
the
cartridge,
which
converts
these
vibrations
into
interference
signals.
To
eliminate
these
problems,
Dual's
new
generation
of
turn-
tables is equipped with tunable acoustic insulators. (Fig, 10)
Interference may be caused by:
1. External vibrations. They occur when the turntable is placed
on a table or shelf in a room with wooden floor. External
vibrations, such as footsteps are transferred from the floor
to the furniture and from there to the turntable. Solution:
rotate the dial rings of the acoustic insulators clockwise (+).
2. Acoustic Feedback. A loud, howling noise will be encoun-
tered when sound waves radiated by the loudspeakers are
being picked up by the cartridge, Acoustic feedback is most
likely to occur when speakers and turntable are installed in
the same shelf. Solution: rotate the dial rings of the acoustic
insulators counterclockwise (—).
All
four
acoustic
insulators
should
be
adjusted
by
the
same
amount.
This will provide optimum acoustic insulation.
Alignment of the tonearm landing point
When the START button (15) is operated, the stylus automati-
cally lowers itself into the lead-in groove of the record, If, in
the case of a subsequently fitted cartridge for example, the
stylus sets down too far from the lead-in groove, the landing
point of the diamond stylus can be corrected with the align-
ment screw (8).
If the stylus sets down too far inside or outside the record,
turn the alignment screw to the left or the right accordingly.
The setting is effective not only for 17 cm but also for 30 cm
records.
Cartridge and stylus
Please refer to the enclosed data sheet supplied separately with
your unit.
Installing cartridges
Note: If you purchased your Dual turntable with a ULM
cartridge, it has already been installed and mounted in the
tonearm. If you wish to use an additional cartridge with
1/2-inch mounting center, an optional mounting kit is included
or available from your Dual dealer.
Replacing the cartridge
You may release the complete cartridge from the tonearm by
pressing the tonearm lift (12) to the rear. When doing this, firmly
grip the cartridge as it will fall off once the locking device has
been released (Fig. 8)
The tonearm lift may, however, only be moved to the rear if
you have previously removed the safety screw (11) (Fig. 11)
u