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Dual 420 Instrucciones De Manejo página 5

Tocadiscos, semiautomatico

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Dear music
lover
Please
read lhese
instructions
carefully
before
you
slart
using your
Dual
so
that
you
will not
encounter
any
problems
resulting from
laulty
connections
or
hand-
ling.
Move page
2
oulward.
Unpack
Remove
all
parts
used
for
packing.
Notice whether
a cartridge is
mounted
in
the
tonearm head
and
remove
the
pro-
tective cap
that
may
be over the
stylus.
lnstructions
for
mounting the cartridge
as
well
as
technical data on factory-mounted
cartridges
can
be found
on
a
separate
sheet
enclosed
with
this
instruction
ma-
nual.
Control
now
the
tonearm balance:
By
turning
the
tracking
force dial from
"0",
the
tonearm
must
remain
in
the
horizon-
tal
position.
To
balance
the
tonearm,
turn the
calibra-
ted dial
until the
tonearm remains
in
a
horizontal position.
Then
adjust
the
ne-
cessary
tracking force. To understand
the
elevation
of
the
tracking
force,
please
see
the
technical information
in
regard
to
the
cartridge.
(Balancing
thetonearm
and app-
lying tracking
force,
please
see
page
6,
where instructions
are
explained
in
de-
tail).
lnstallation
The installation instruction
is
only importanl
if
the
phonograph
is
bought
without
base.
Fig.
1
Position
the
chassis
over
the
base
(or
mounting board)
so
that the three
cupped
spring-mounted
footings
will
fit
into
their
cut-outs (A).
Tilt
both
mounting
screws
to
let
them
slip
past
the
notches as
you
lower the
chassis.
Then
turn
each screw
clockwise
qntil
it
is firmly
seated
into
the
top
of
the
lhassis
(B).
This simple procedure
solves
three
pro-
blems.
The screws hold the
chassis
on
its
base, secure
it
when
it
has
to
be
moved
any distance, and allow
the
chassis
to
be
installed entirely
from the
top.
To
transport
the
Dual
on
its
base,
turn
the screws counterclockwise, depress
the
chassis
against
the
base,
then
continue
to turn
each screw counterclockwise until
it
holds the
chassis securely against
the
base (C).
For
reinstallation, loosen
the
screws and proceed again
as
described
above.
Connection to power supply
The
operating instructions of the
record player
component are
to
be
used
for
record
changers
installed
into
consoles.
The
Dual operates
on
110
or
220
VAC,
50
or
60
Hz,
and
is
usually
set
for
220
volts 50
Hz.
Fig.
3
The voltage can be seen on the
voltage
selector, the frequency
is
shown
on
the
type plate. Both voltage selector and
type
plate
can be
reached
after the
turntable
platter
is
removed.
Changing the frequency
To
change
frequency,
it
is
necessary
to
ohange
the
motor
pulley (A)
which
is
secured
to the
motor shaft
by
a
screw.
For access
to the
motor pulley
the
platter
must
be
removed.
Extreme
care is
necessary when changing
the
motor pulley, as
a
bent motor
pulley
will
cause
rumble.
Part numbers
for
motor
pulleys:
50
Hz:220
418
6O
Hz:22O
419
Removing
the platter
The
platter
is
supported
by
means
of
a
spring
disc
secured
by
a
nut that
sits
on the platter
cover.
To
remove
the
plat-
ter,
first
remove
the
platter cover,
then
the spring
clip
can be
removed.
lmportant:
When
handling
the
platter
avoid touching
the inner surfaces with
your
fingers
as
skin
oils
can
cause
slippage
(and resulting pitch
deviation) between the
idler
wheel and
the
driving
rim
of
the
platter.
Connection
to amplilier
The
operating instructions of the
record player
component are
to
be
used
for
record
changerg
installed
into
consoles.
The record player cable can be
plugged
on
standard design
with
miniature
con-
nectors.
253
\l/
2:L
3:leltchannet
5
:
right
channel
Fig.
5
lf your amplifier
has
different connections
than those
of the
Dual, adapters
can
be
obtained
from your
dealer.
This
unit
corresponds
to the
international
safety
standards
for
radio
sets
and similar
units
(lEC 65)
and is approved
by
the cor-
responding
national
authorities.
Service
All
lubrication points
of the
Dual
are
supplied with sufficient
oil to
permit
years
of
operation under normal conditions.
Do
not add
oil
at
any point, as special lubri-
cants are
used.
lf
your
Dual
should
ever
need maintenance, please
take
it
to
your
dealer
or
ask him
for the
name
of
the
nearest
authorized Dual Service
Station.
This
will
assure
that only
proper
Dual
parts are
used.
When shipping your
Dual,
use
the original
packing
in
order
to
pre-
vent
damage
in
transit.
lf
the
original
packing
has
been
discarded,
write
for
special shipping instructions.
@@@
Fig.2
Fig.4

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