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Pioneer SX-1080 Service Manual

Pioneer SX-1080
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3.
FRONT
PANEL
FACILITIES
POWER
METERS-
These
power
meters
allow
you
to
read
out
the
rated
power
level
when
speakers
with
a
nominal
impedance
of
8
ohms
are
connected
to
the
receiver’s
speaker
terminals.
NOTE:
These
values
are
related
to
the
impedance
of
the
speakers
and
they
vary
according
to
the
frequency.
In
order
to
find
out
the
exact
output
level,
connect
an
S-ohm
dummy
load
instead
of
the
speakers.
PHONES
JACK-
Plug
the
headphones
into
this
jack
when
you
want
to
listen
through
your
stereo
headphones.
Release
the
all
SPEAKERS
buttons
if
you
want
to
listen
to
the
sound
through
your
headphones
only.
(This
means
that
all
two
buttons
will
be
released).
-FILTER
BUTTONS
15Hz
When
this
button
Is
pressed,
a
6dB/oct
atteiiua-
tion
can
be
provided
for
frequencies
b
ow
15Hz.
This
means
that
you
can
cancel
out
r
>ise
in
the
ultra-low
frequencies
which
is
gener
ted
by
low-pitched
rumble
from
a
turntable
md
other
forms
of
distortion.
Although
this
r
jise
cannot
be
heard,
it
can
generate
intermo<ula-
tion
distortion
and
damage
the
speakers.
6kHz
,
.
Press
this
button
to
provide
a
6dB/oct
atlc
ua-
tion
at
frequencies
above
6kHz.
Set
it
to
this
position
when
you
find
high-frequency
n
lise,
such
as
that
from
scratched
records,
unpIca;
jnl.
I—
FUNCTION
BUTTONS
Press
the
function
button
which
corresponds
to
the
pro¬
gram
source.
Turn
the
VOLUME
control
down
first
before
selecting
a
different
function
button
while
the
sound
from
one
program
source
is
being
reproduced.
FM.Press
this
button
for
FM
broadcasts.
The
FM
STEREO
indicators
light
up
when
the
receiver
is
tuned
into
an
FM
stereo
broadcast.
The
sound
is
automatically
received
monophonical-
ly
during
FM
monophonic
broadcasts.
AM.Press
this
button
for
AM
broadcasts.
AUX.Press
this
button
when
listening
to
an
audio
component
connected
to
the
AUX
input
jacks.
POWER
SWITCH^-
Flip
this
switch
to
the
ON
position
to
supply
power
to
the
stereo
receiver.
There
will
be
a
short
delay
when
it
is
set
to
ON,
because
the
muting
circuit
has
been
actuated
to
suppress
the
unpleasant
noise
that
is
sometimes
generated
when
the
power
is
switched
on
and
off.
SPEAKERS
BUTTONS
Press
the
button
corresponding
to
the
speakers
connected
to
the
SPEAKERS
terminals
(A,
B)
on
the
rear
panel.
You
can
press
two
of
these
buttons
to
listen
to
sound
from
two
pairs
of
speaker
systems
at
the
same
time,
BASS
TURNOVER
SWITCH
Use
this
switch
to
change
over
the
frequency
in
which
the
sound
adjustment
with
the
BASS
control
is
starting
to
take
effect.
Select
200Hz
or
400Hz
in
accordance
with
the
characteristics
of
your
listening
room
and
of
your
speakers,
and
with
your
general
preference.
TONE
SWITCH-
Set
this
switch
to
ON
when
adjusting
the
BASS
and
TREBLE
controls.
In
the
OFF
position,
it
causes
the
amplifier
to
operate
with
a
flat
frequency
response.
BASS
AND
TREBLE
CONTROLS
Use
these
controls
to
adjust
the
bass
and
the
trlble.
If
you
set
the
TONE
switch
to
ON
and
turn
the
B
control
to
the
right
from
its
center
position,
you
wi
able
to
emphasize
the
sound
in
a
frequency
range
whilti
is
lower
than
that
selected
by
the
BASS
TURNOt
switch.
Conversely,
turning
this
control
from
the
ctfiter
position
to
the
left
will
attenuate
the
sound.
You
can
use
the
TREBLE
control
to
adjust
the
sound
frequency
higher
than
that
selected
by
the
TREBLE
TURNOVER
switch.
hSS
be
n
a
LOUDNESS
SWITCH
Set
this
switch
to
ON
when
listening
at
a
low
volume.
The
frequency
response
of
the
human
ear
varies
according
to
the
listening
volume,
and
setting
this
switch
to
the
ON
position
compensates
for
hearing
response
by
emphasizing
the
bass
and
treble.
TREBLE
TURNOVER
SWITCH
Use
this
switch
to
change
over
the
frequency
in
which
the
sound
adjustment
with
the
TREBLE
control
is
starting
to
take
effect.
Select
2.5kHz
or
5kHz
in
accordance
with
the
characteristics
of
your
listening
room
and
of
your
speakers,
and
with
your
general
preference.
PHONO
2/MIC..
Press
this
button
when
playing
a
record
on
the
turntable
connected
to
the
PHONO
2
jacks,
or
when
using
a
microphone
which
you
have
plugged
into
the
MIC
jack.
PHONO
1.Press
this
button
when
playing
a
record
on
the
turntable
connected
to
the
PHONO
1
jacks.
NOTES:
1.
Unplug
the
microphone
from
the
MIC
jack
when
you
do
not
intend
to
use
the
microphone
otherwise
you
will
not
be
able
to
use
the
PHONO
2
jacks.
2.
Only
one
function
button
should
be
pressed
at
a
time.
MIC
JACK
Plug
your
microphone
into
this
jack.
The
microphone
signals
are
reproduced
in
mono
through
the
left
and
right
speakers.
NOTE:
A
high
impedance
(approx.
50
kilohms)
dynamic
type
microphone
with
a
standard
plug
can
be
connected
to
this
jack.
VOLUME
CONTROL
Use
this
control
to
adjust
the
output
level
to
the
speakers
and
headphones.
Turn
it
clockwise
to
increase
the
output
level.
No
sound
will
be
heard
if
you
set
it
to
The
scale
is
graduated
in
dB
which
indicate
the
attenuation
when
the
maximum
output
level
is
OdB.
MUTING
SWITCH
Set
this
switch
to
the
-20dB
position
to
attenuate
the
audio
output
indicated
by
the
VOLUME
control
by
20dB.
There
is
no
need
to
adjust'the
VOLUME
control
if
you
use
this
switch
when
turning
down
the
audio
output
temporarily
and
when
changing
over
records
or
tapes.
BALANCE
CONTROL
Use
this
control
to
balance
the
volume
of
the
left
and
right
channels.
First,
however,
set
the
MODE
switch
to
MONO,
and
adjust
so
that
the
sound
appears
to
come
from
somewhere
exactly
between
the
two
speakers.
If
the
sound
appears
to
be
louder
on
the
right,
it
means
that
the
volume
of
the
right
channel
is
higher.
Turn
the
BALANCE
control
to
the
left
and
adjust.
Conversely,
if
the
sound
appears
to
be
louder
on
the
left,
it
means
that
the
volume
of
the
left
channel
is
higher.
Therefore,
turn
the
BALANCE
control
to
the
right
and
adjust.
After
adjust¬
ing,
return
the
MODE
switch
to
STEREO.
y

Table of Contents

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Pioneer SX-1080 Specifications

General IconGeneral
Total Harmonic Distortion0.1% (at rated power)
Tuning RangeFM, MW
Damping Factor30
Input Sensitivity2.5mV (MM), 150mV (line)
Output150mV (line), 1V (Pre out)
Speaker Load Impedance4Ω to 16Ω
Frequency Response5Hz to 100kHz
Signal to Noise Ratio90dB (line)
Semiconductors4 x FET, 6 x IC
Power Output120 watts per channel (8 ohms, 20Hz-20kHz)

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