Dual CS 728 Q Manual Del Usuario página 11

Operation
Preparation
Turn the
unit on by
depressingthe POWER switch
(21).Setthe
speedselector knob
(10)
to
either
33
113
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"1
and
17
cm
(7")
records respectively.
The selected speed
will
be
illuminated on the
front
panel (17)
To
begin
play automatically,
press the
STAFT button (15)
.
The platter will start
rotating,
and
the
tonearm
will
move
to
the
record and
lower
the
styl us
gently
in
the
lead
in
groove.
2.
Manual operation
a)
Depress
the LIFT
pushbutton (13). Arrowmark
r
lights up.
b) Swing the tonearm over the
desired
position of
the
record
manual
I
y.
c)
Depress
the
Ll FT
pushbutton (13)
once
more.
The
v
arrow-
mark lights up
and
the tonearm
is
lowered
on the
record.
3.
lnterruption
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
depressinq
the LIFT
pushbutton
once
more.
The stylus
will
be lowered
to
approximately the
same
position on the
record where
it
was
lifted o{f
and
the
last few
music
beats
played
before the pause are
repeated.
5. Auto stop
Depress
the
STOP
pushbutton
(
141
.
The tonearm will return auto-
matically
to
the arm rest and the
turntable
drive
is
switched off
.
6.
Continuous
repeat
Press
co
pushbutton
(16) At
the
end
of the
record,
the
tone-
arm will
automatically
repeat
piay
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.
Sir,nultaneously
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,
if
the
(41
arrow
above
the
lift
button
is
illuminated whenstart
is pressed,
the
tonearm
will
move
to the
record
and
remain
suspended
over
it
until the
lift
button
is pressed and
the
(
v
)
arrow is illuminatecil Then the tonearm
will
descend
and
begin
pl
ay.
The toneatm's descent
speed
can
be
varied by adjustment con-
trol (5)
.
See
f
igure
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.
(r
illuminated).
Pitch control
lndividual
pitch control
is
provided for
f
ine
adjustment
of
the
two
standard
speeds 33-1 13 and
45
RPM
by
means
of
a
special
PITCH adluster
(19).
After
depressing
the
PITCH pushbutton (18) the OUARTZ
in
dicator
goes
off
and
the
PITCH
indicator lights up.
with
the
PITCH
pushbutton in
depressed
position
it
is
possible to vary
the pitch by
adjustment
of the
PITCH
control (19)
in
either
one
of
the two
selected
turntable platter
speeds
(33-1/3
or
45
RPN/)
by
t
5.5
%
After
releasing
the PITCH pushbutton (18) tne OUARTZ
indi
cator lights up again. Rotational
speed
of
the turntable platter
will
be
quartz controlled
and
corresponds exactly to
the selected
nominal
speed
without
regards
to
the adjustment
of
the
PITCH
conrrol (191.
Precise
stroboscope patterns etched into
the
turntable platter
rim are
illuminated
by a
special LED strobelight
(20).
See
Fig.
4.
The sequence
of light
pulses corresponds
to the
quartz-
stabilized frequency which controls the motor
speed.
This indi
cator
functions
independently
of
line
frequency and
does
not
require
several
stroboscope patterns for different
speeds and
line frequencies.
Tunable
acoustic insulators
One
of
the
most frequent problems in turntable operation
are
vi
brations
of
various origins, being
picked up by
the turntable
chassis
and
transferred
to
the cartridge, which converts
these
vi
brations
into
inter{erence
si
gnals.
To
el
iminate
these problems, Dual's new
generation
of
turn-
tables
is
equipped with
tunable
acoustic
insulators. (Fig.
10)
Interference may
be
caused bv:
l.
External
vibrations. They occur
when the turntable
is
placed
on
a table
or
shelf
in
a room
with
wooden
floor.
External
vibrations,
such
as
foctsteps
are
transferred
from the floor
to the furniture
and
from
there
to
the
turntabie. Solution:
rotate the dial rings of the
acoustic insulators
clockwise (+).
2.
Acoustic
Feedback.
A
loud, howllng
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
shel
f
.
Solutioni
rotate the dial
rings
of
the acoustic
insulators countercl ockwise
(
-)
All
four
acoustic insulators
should
be adjusted
by
the
same
amou
nt
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.
lf,
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).
lf
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.
lnstalling cartridges
Note:
lf you
purchased
your
Dual turntable
with a
ULM
cartridge,
it
has already
been installed and mounted
in
the
tonearm.
lf
you
wish
to
use an additional
cartridge
with
11Z-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 doin
g
this,
f
irmly
grip the
cartridge
as
it will
fall off
once
the locking
device
has
been released
(Fig.
B)
The tonearm
lift
may,
however,
only
be moved
to the
rear
if
you
have
previously
removed the safety screw
(11)
(Fig.
11).
11