Pioneer SX-939 User manual

STEREO RECEIVER
SX-939
OPERATING
INSTRUCTIONS
YQPIONEER

LINE VOLTAGE AND FUSE AND REAR PANEL
Each design of LINE VOLTAGE and FUSE of this ~
model differs according to each destination to be
delivered.
How to operate the SX-939 is quite the same for
each version. However, each rear panel differs
according to LINE VOLTAGE and FUSE designed
for each version.
Fig. A shows the LINE VOLTAGE of a 220V only
model.
Fig. B shows the LINE VOLTAGE and FUSE of a
5
line
voltage
(110V,
120V,
130V, 220V,
240V)
whose
line
voltage
and
fuse
can
be
changed
and
set
as follows:
The Line VOLTAGE of a 120V only model is
illustrated
Connection
Diagram.
220V model
AC INLET
5
Line
Voltage
mode!
CONTENTS
SX-939 Features .............0000 3
Essentials You should Know.......... 4
Connection Diagram ............... 4
Stereo Setup: ic icecicessececs 6
Speaker Connection ................ 6
Antenna and Ground Connections ..... 7
Connections ......... 0.0000 ee eens 8
CHANGING LINE VOLTAGE SETTING AND
FUSE
To
remove
the
fuse,
tun
the
fuse
cap
located
on
the
line
voltage
selector
in the
direction
indicated
by
the
arrow.
Then
remove
the
fuse
plug
from
the
unit.
Put
the
fuse
plug
back
so that
the
proper
line
voltage
marking
can
be
seen
through
the
cut
in the
edge
of
the
plug.
Whenever
the
position
of
the
selector
is
changed,
check
the
rating
of
the
fuse.
A
3A_
fuse
is to
be
used
for
either
220V
or
240V
operation
and
a
6A
rating
for
110V,
120V
or
130V
operation.
If
the
rating
of
the
fuse
is correct,
replace
cap.
FUSE REPLACEMENT
When the fuse blows, remove the fuse cap and
replace the fuse with a new one. Fig. C.
FUSE
FUSE CAP
PHILLIPS (3)
SCREWDRIVER
__...
SOCKET
SP FUSE PLUG
Fig. C
Front
Panel
Facilities...
.............
10
How
to Operate
the Receiver
........
12
Versatile
Jacks
for Today
and
Tomorrow ......... 06. e cece eee 14
Conditions Frequently Mistaken
for Malfunction ...............4. 16
Mounting Template ..............45 17
Specifications .................000. 18

ee
FON
KK
SX-939 FEATURES
FM Front End With Dual-Gate FET’s, Buffer Amp
FM tuner’s sensitivity, overload resistance (ability to receive
very strong signals without distortion), image rejection and
spurious rejection are determined chiefly by the front end.
In the SX-939) latest components and circuit technology
have been employed to bring all these values close to their
theoretical limits: two dual-gate MOS FET’s. RF amplifi-
cation, and the inclusion of a buffer amplifier between local
oscillator and mixer stage. In all performance character-
istics, the SX-939’s FM tuner compares favorably with the
world’s most advanced specialized tuners,
It hardly needs to be mentioned that the FM dial is of
course divided into equal “linear” intervals and that dual
tuning meters — signal strength meter and zero-center meter
—are provided for easy, precise tuning.
Ceramic Filters And IC’s In IF Stages For
Sharp Selectivity
A total of three ceramic filters in the IF (intermediate
frequency) stages give sharp selectivity and never need to be
realigned. Integrated circuits functioning as limiters provide
stable operation and excellent capture ratio (the ability to
distinguish between a wanted and an unwanted signal on
the same station band).
Quadrature Detection, Phase Lock Loop (PLL)
Stereo Demodulator
Detection of the frequency-modulated signal is performed
by the “quadrature” method with a balanced-bridge type
differential amp, This costly design assures linearity
throughout the frequency band and reduces distortion to
the minimum, In the MPX circuit, a phase-lock-loop (PLL)
circuit design is used to give clear, stable separation at any
audio frequency. The circuit is equipped with an IC
(replacing six transistors) in a bridge configuration.
IC Mean Great AM Listening, Too
This section also incorporates integrated circuits and auto-
matic gain control in the RF and IF stages, as well as a
3-ganged variable capacitors for improved image ratio,
selectivity and frequency response, plus reduced distortion.
Balanced Positive And Negative Power Supply
With Heavy-Duty Components
The power supply unit - backbone of any amplifier — is of
the most elaborate type such as used anywhere in home-use
audio equipment, with balanced dual, polarity supply and
extre large10,000uF capacitors. This results in a tremendous
reserve of power for transient peaks, but also eliminates the
irritating switching noise often encountered in less profes-
sional designs.
Phono Equalizer With Wide Dynamic. Range And
Extremely Close Tolerances
The incoming phono signal from a turntable is equalized
precisely according to the international RIAA standard
playback curve — within 0.3 dB of the ideal, Moreover, the
phono inputs can accept relatively strong signal levels
without distortion (250mV rms), resulting in a wide
dynamic range. This is due to the circuit design with three
direct-coupled amplification stages including a differential
amp in the first stage.
Twin Tone Controls Permit Precise
“Shaping” Of Sound
The overall frequency response curve can be controlled in a
total of seven ways. Twin controls in the bass range permit
variation at 100Hz by +10dB in 2dB steps, and at 50Hz by
+5dB in 2.5dB steps; similarly, the high controls give +10dB
correction in 2dB steps at 10kHz, and again +5dB correc-
tion at 20kHz in 2.5dB steps. All tone controls can be
removed from the circuit (by setting the TONE swtich at
OFF) if desired. High and Low filters are provided for
solving specific noise problems, while the Loudness switch
boosts the very low and high frequencies at soft listening
volumes, giving a more natural sound contour, In one word:
the SX-939 gives you complete mastery over what you
hear.
... Plus A Wealth Of Auxiliary Features
And Circuits
Dolby* inputs and outputs permit confection of an
outboard Dolby noise reduction unit, for example, to
receive Dolby-encoded FM programs.
Two tape monitor circuits allow two tape decks to be used
for recording, playback and tape-to-tape duplicating.
Microphone inputs on the front panel let you use the
SX-939 as a public address amplifier.
Audio muting switch decreases the volume instantly by
20dB without having to turn back the volume control,
Indicator lamps light up in accordance with the functions
used, telling you at a glance what you're hearing and how.
Dimmer switch dims illumination of tuning dial, tuning
meters and indicator lamps, leaving only a softly glowing
light in the dark.
*The word ‘Dolby’ is a trademark of Dolby Laboratories Inc.
3

ESSENTIALS
YOU
SHOULD
KNOW
PLACEMENT
OF
YOUR
SX-939
The
SX-939
is
heavy
and
should
always
be
handled
with
great
care.
Equal
care
should
be
given
to
the
choice
of
its
placement
within
your
listening
room.
Once
you
have
chosen
the
best
position,
you
can
proceed
with
connection
of
the
speaker
systems
and
turntable.
Be
sure
to
avoid
the
following
locations,
which
can
cause
malfunctions:
®@
Places
exposed
to
direct
sunlight
or
close
to
heating
units
or
other
sources
of
heat.
@
Places
with
poor
ventilation.
©
Excessively
humid
or
dusty
locations.
©
Sloping
locations,
those
subject
to
vibration,
or
otherwise
unstable.
@
Places
close
to
alcohol
and
spray-type
in-
secticides,
etc.,
or
any
other
such
highly
inflammable
substances.
PROTECTION CIRCUIT
For
some
3
to
6
seconds
after
the
receiver
is
switched
ON,
no
sound
will
be
heard.
This
is
due
to
the
operation
of
protection
circuits
which
are
designed
to
guard
transistors
and
speakers
from
possible
damage
due
chiefly
to
the
switching
transients,
etc.
Should
the
receiver
remain
silent
for
considerably
longer
than
this,
first
switch
off,
and
then
check
the
speaker
system
connections.
Should
the,,receiver
suddenly
go
silent
while
you
are
listening to
it,
if
you
can
hear
a
continuous
series
of
“clicks”
due
to
relay
contacts
opening
and
closing
within
the
receiver,
this
can
be
an
indication
of
a
short
circuit
in
the
speaker
system
connections.
Switch
off,
and
re-check
the
speaker
system
impedances,
etc.
The
protection
circuit
re-sets
itself
automatically,
so
that
normal
functioning
is
resumed
as
soon
as
the
cause
is
removed.
*
The
word
“Dolby”
is
a
trademark
of
Dolby
Laboratories
Inc.
CONNECTION
DIAGRAM
. T-TYPE
FM ANTENNA
FM
DE-EMPHASIS
SWITCH
(5
LINE
VOLTAGE
MODEL
ONLY)
Before
shipment
this
switch
has
been
pre-set
to
the
appro-
priate
position
for
the
delivery
area.
Models
for the
U.S.A.
and
Canada
are
set
to
“75sec”
and
other
models
are
set
to
“BOusec”’.
Incorrect
setting
will
adversely
affect
the
high
sound
range,
so
check
the
position
before
op-
erating
this
unit.
If
you
are
in
doubt
about
the
pre-emphasis
used
in
your
area,
consult
your
audio
dealer.
NOTE:
Be
sure
to
set
the
switch
to
“25usec’”
only
when
receiving
a
special
FM
Dolby”
broadcast
(pre-empha-
sis
25usec)
with
an
auxiliary
Dolby*
NR
adaptor
connected
to
your
system.
OUTDOOR
FM ANTENNE AM ANTENNA
3002
feeder
|
|
|
752
coaxial
cable!
FM OF EMPHASIS
Pout 50 7508
ews
AM
FERRITE
ANTENNA
PRE/POWER
AMP—————
The
bridge/connecting
_ plugs
between
PRE
OUT
and
POWER
IN
jacks
should
always
be
left
in
position
in
normal
use.
If
they
are
disconnected
or
removed,
no
sound
will
come
from
the
speak-
ers,
Always be sure to cut the power
supply before attempting to re-
move them.
As for the applications of the
PRE OUT and POWER IN jacks,
please refer to the section on
PRE OUT AND POWER IN
JACKS on page 9.
er
ee
4

PIONEER
TAPE
DECK
TAPE
DECK
TURNTABLE TURNTABLE
CARTRIDGE
{open-reel,
cassette)
TAPE
PLAYER
—————
——
LINE
Connect
to
OUTPUT
ground
terminal
of
turntables, tape decks,
etc.
Recording
/Playback
cord
DIN-type
For
connecting
4-channel
discrete
FM
adaptor
For connecting
Dolby NR adaptor
SPEAKER SYSTEMS

STEREO
SETUP
Your SX-939 receiver is ideally suited to form the -
heart of a stereophonic reproduction system of
the very highest quality. Use it, as shown in Fig. 1,
with the speaker systems and other components
of your choice, including tumtable, tape deck
(either open-reel or cassette type), etc. The receiver
can also be used as part of the following systems:
@ Multi-amplifier systems.
@ Dolby system reception, playback, and recording.
@ Four-channel playback systems.
@ Four-channel FM multiplex reception.
TAPE DECK
(open-reel or cassette)
TURNTABLE
CARTRIDGE
TAPE PLAYER
+0 Mal Oo
‘SX-939
Vadeod iy MICROPHONES
go
010
080900
0
(8)
SPEAKER SYSTEMS Fig. 1
SPEAKER
CONNECTION
The
receiver
is
equipped
with
three
sets
of
speaker
terminals
(A,
B,
and
C).
Use
the
A terminals
for
the
speakers
in
normal
use.
As shown in Fig. 2 , connect the terminals marked
R
to
the
RH-speaker
systems
(the
speaker
which
is
on
the
right-hand
side
as
viewed
from
the
listening
position), and the terminals marked L to the
LH-speaker systems.
@ As shown in Fig. 3, the upper socket (red) is
the positive (+) terminal, and the lower (black) is
the negative (—) terminal in each case.
In the same way, the speakers, too, have positive
and negative polarity (+ and — terminals).
Be sure to connect terminals of the same
polarity together (+ to +, and — to —).
SPEAKER OUTPUT TERMINALS
RIGHT CHANNEL,
RIGHT SPEAKER LEFT SPEAKER
SYSTEM SYSTEM
Fig. 2
NOTE:
When two sets of speaker systems are being used at the
same time (A+B, A+C, or B+C), please ensure that the
impedance of each speaker system is not less than 8Q. If
speaker systems with impedances below 8 Q are used, the
protection circuit of the receiver may operate to prevent
audition.
Speaker Terminal and Lead-Wire Connections
Connecting
the
leads
(see
Fig.
3
)
1. Depress the black lever on the speaker terminals
and insert the lead from the negative (—) side
into the lower socket hole, and release the lever.
2. Lift up the red lever on the speaker terminals
and insert the lead from the positive (+) side
into the upper socket hole, and then release
the lever.
Speaker lead-wire
10mm.-
Jystiionpe
Remove
insulation
Ss from wire end,
cE
Twist
stranded
wire.
lever
ate
(>)
@
S
lever
Speaker lead -wire
(a)
Fig. 3
Speaker Placement
The optimum stereo effect is obtained from a
two-channel stereo system when the two speaker
systems on the left and on the right are about the
same distance apart as they are from the listener,
forming the three corners of an equilateral triangle.

PIONEER
ANTENNA
AND
GROUND
CONNECTIONS
FM ANTENNA CONNECTIONS
For the best results you should use an outdoor-type
FM antenna. The simple T-type antenna supplied
with the receiver may be satisfactorily used in areas
of high signal strength (for instance, those very
near to the FM station, or in an all-wooden
construction house.)
Placement and Connection of FM Antenna
@ Connect the feeder wire from the antenna to
the FM ANTENNA terminals on the receiver.
@ Please place the antenna for the best reception
while listening to the FM broadcast station as
described in “FM Reception” on page 12.
ANTENNA
TOAUNBAL 3008BAL ao AM ANT
Fig. 4
T-TYPE
Direction
of
OUTDOOR
FM
pao
station ANTENNA
“XN
To FM ANT terminal
Fig. 5
Making
Connections
with
Coaxial
Cable
In certain locations — in cities with high traffic
density,
in
industrial
areas,
and
near
high
voltage
power
lines
—
objectionable
interference
may
be
present even with the use of an outdoor FM
antenna. Please consult with your local audio
dealer on the advisability of connecting the
antenna and receiver with 752 coaxial cable in
place of the feeder you are using. When using
coaxial cable, connections should be made as
shown in Fig. 6.
a
8
A)
Strip
the
coaxial
INNER
cable
as
shown.
CONDUCTOR
©
B) Loosen the screws
and connect the
F
cable.
sarthiee Then tighten all
(BRAIDIE
Nene
en
COAXIAL
CABLE
(75-ohm)
Fig.
6
AM ANTENNA CONNECTIONS
Under normal conditions it will be sufficient to
adjust the ferrite bar antenna mounted on the
rear panel of the receiver for optimum broadcast
signal reception as shown in Fig. 7 and in
accordance with the instructions given on pagel2
“AM Reception.”
Should reception still be noisy or week with the
bar antenna, an indoor lead antenna or special
outdoor AM antenna must be fitted.
Placement and Connection of AM Antenna
© Connect the antenna lead to ‘the receiver AM
ANTENNA terminal.
@ Use vinyl-sheathed wire as shown in Fig. 7
for the indoor lead antenna.
@ For anoutdoor AM antenna, use trees, etc., to
suspend the vinyl-sheathed wire as shown in
Fig. 7.
AM FERRITE ANTENNA
INDOOR AM LEAD ANTENNA OUTDOOR AM ANTENNA
(8)
(c)
To
AM
ANT
terminal
Fig.7
THE GROUND TERMINAL
It is advisable, both on the grounds of safety and
the elimination of interference, to install a ground
wire
wherever
possible.

CONNECTIONS
TURNTABLE CONNECTIONS
The receiver is fitted with two phonograph input
jacks, PHONO 1 and PHONO 2, enabling two
turntables fitted with magnetic phono cartridges
to be connected.
© Connections between the turntable OUTPUT
plugs and the receiver PHONO input jacks
should be made as shown in Fig. 8, taking care
not to confuse L & R channels. If, as in Fig. 8,
the turntable is fitted with a ground lead or
plug, this should be connected to the receiver
GND terminal.
NOTES:
1, When using a turntable fitted with two tonearms, the
output leads for each of the tonearms should be
connected to the respective PHONO input jacks (I
and 2).
2. When using a turntable fitted with a moving coil
(MC) phono cartridge, it is essential to use a special
MC matching transformer or head amplifier.
$X-939’s
PHONO
input
jacks
R CH
TURNTABLE’s output jacks
TAPE DECK CONNECTIONS
The provision of two sets of recording output
jacks (TAPE 1, 2 REC) and two sets of playback
input jacks (TAPE 1, 2 PB) plus a DIN-type
recording/playback connector (TAPE 2 REC/PB)
means that, in addition to normal recording and
playback, two tape decks can be used to record
at the same time, or to “dub” or duplicate
recordings from one tape deck to the other.
Use the connecting cord(s) provided with the tape
deck(s) to make the connections (see Fig. 9).
Thé tape deck can also be connected to the
ADAPTOR jacks (DOLBY NR — noise reduction).
Fig. 8
$X-939's TAPE jacks
LINE
LINE
»
INPUT_OUTPUT
NeUT OUT
ae
input and output jacks Fig. 9
For playback
For
recording
Y
connection
connection
Connections for Recording
@ The receiver output TAPE 1 REC jacks are
connected to the recording input jacks (LINE
INPUT) of the tape deck as shown in Fig. 9.
The upper jacks of each pair are the L (left)
channels and the lower are the R (right) channels.
When the tape deck is provided with a DIN-type
connector for recording and playback, use the
optional recording/playback cord (e.g. Pioneer
model PP-101) to make the connection with
the TAPE 2 REC/PB DIN connector.
NOTE:
If the recording/playback cord connects both recording
and playback at the same time, there is no need to
make separate connections to either TAPE 2 REC output
jacks or TAPE 2 PB input jacks, If the ADAPTOR OUT
jacks are to be used, connect them to the tape deck input
(LINE INPUT) jacks.
@ When using two tape decks, the second tape
deck should be connected to the receiver TAPE
2 REC output jacks. If, however, the first deck
has been connected to the DIN-type recording/
playback connector, the second deck should be
connected to the TAPE 1 REC output jacks.
$X-939's TAPE jacks
DIN-type Recording/Playback cord
(e.g, Pioneer model PP-101)
REC/PB
TAPE
DECK’s
DIN-type
connector
Fig. 10

ee R PIONEER
Connections for Playback
@ Connect the receiver TAPE 1 PB input jacks to
the playback output jacks (LINE OUTPUT or
TAPE MONITOR) on the tape deck. The upper
jacks of each pair are the L (left) channels,
and the lower are the R (right) channels.
NOTE:
If the ADAPTOR IN jacks are to be used, connect
them to the tape deck output (LINE OUTPUT) jacks.
@ When using two tape decks, the second tape
deck should be connected to the receiver TAPE
2 PB input jacks. If, however, the first deck
has been connected to the DIN-type recording/
playback connector (TAPE 2 REC/PB), the
second deck should be connected to the TAPE
1 PB input jacks.
USE OF THE AUX INPUT JACKS
These jacks are a set of spare input jacks. They
can be connected to cartridge tape players,
television sound multiplex tuners, or other forms
of signal output.
The upper of the two terminals is the L (left)
channel, and the lower is the R (right) channel.
USING THE PRE OUT AND POWER IN JACKS
If the connections between the PRE OUT and
POWER
IN
jacks
shown
in
Fig.
11
are
removed,
the power amplifier and pre-amplifier sections can
function separately.
By
isolating
the
receiver
pre-amplifier
section,
it is
possible
to
use
it
to
drive
a
separate,
high
output
power
amplifier
or
to
build
up
a
multi-amplifier
system
as
detailed
here.
Fig. 11
Connections for Setting up A Multi-amplifier
By
purchasing
anelectronic
crossover
network
and
one or two additional power amplifiers, a two- or
three-way multi-amplifier system can be set up.
The multi-amplifier system splits up the audible
frequency range into different frequency bands,
operating amplifiers and speakers ideally suited to
each band. This results in reduced intermodulation
distortion and improved damping and crossover
characteristics. Use of the multi-amplifier system
enables construction of the ideal playback system.
Connections for a two-way multi-amplifier system
are as follows:
1. Remove both of the plugs bridging the PRE
OUT and POWER IN jacks.
2. Connect the PRE OUT jacks to the input jacks
of the crossover network.
3. Connect the POWER IN jacks to the LOW range
jacks of the crossover network.
4, Connect the HIGH range output jacks of the
crossover network to the input jacks of a
separately bought power amplifier for the
high frequency range.
5. Connect the speakers for the lower frequencies
to the receiver, and those for the higher fre-
quencies to the separate amplifier.
The levels of the different frequency ranges are
adjusted at the crossover network. For detailed
instructions on the use of the crossover network,
please refer to the instruction manual provided
with it.
SPEAKER SYSTEMS
$X-939 RIGHT SIDE
TWEETER
CROSSOVER
NETWORK
WOOFER
POWER AMPLIFIER
(HIGH-RANGE)
Fig. 12

FRONT
PANEL
FACILITIES
SPEAKER BUTTONS
Each of speaker systems A, B, and C is connected to each
of output terminals A, B, and C.
By pushing the following:
SPKR-A .... Speaker systems A into operation
SPKR-B .... Speaker systems B into operation
SPKR-C .... Speaker systems C into operation
NOTES:
1. When any two pairs of the buttons (A + B, B+ C,C +A) are
depressed, the corresponding pairs of speaker systems will
come into operation. However, operating all three buttons
even though depressed at the same time is not possible.
2. Only when listening through headphones, press again the
SPKR button(s) in use to OFF (undepressed) from the
ON
position
(pressed)
POWER SWITCH:
Turn
this
switch
ON
but
wait
for
some
3
to
6
seconds,
during
the
silence
of
which
the
protection
circuit
elimi-
nates
the
unpleasant
noise
not
imputed
to
a
receiver
fault,
For
details,
see
“PROTECTION
CIRCUIT”
on
page
4.
PHONES (1, 2) OUTPUT JACKS
Accept
two
pairs
of
headphones.
SIGNAL METER
For AM and FM station tunings.
AM tuning: Tune the dial pointer so that the SIGNAL
meter needle comes to the extreme right.
FM tuning: Both the SIGNAL and FM TUNING
meters work together. The optimum
point of the SIGNAL meter needle is the
same as in AM tuning. Then use the FM
TUNING meter,
BASS CONTROLS
Adjust bass tone quality.
1OOHz
.....
For
the
low
frequencies
below
400Hz.
Possible
up
to
10dB
of
increasing
or
reducing
at
100Hz
in
2dB
steps.
SOH2
=
53
e.
After
adjustment
by
the
100Hz
control,
further
adjust
frequencies
below
80Hz
by
this
control,
if
necessary.
Possible
up
to
5dB
of
increasing
or
reducing
in
bass
response
at
SOHz
in
2.5dB
steps.
LOW CUT, HIGH CUT BUTTONS:
LOW
......
When
the
low-pitched
rumble
(turntable
motor
or
other
source)
is obtrusive,
de-
press
the
LOW
CUT
button
to
ON.
Inno
interference,
leave
it undepressed
(OFF).
HIGH
......
When
the
high
frequency
scratch
noise
(records
or
other
source)
is much,
depress
this
button
to
ON.
In
no
interference,
Icave
it undepressed
(OFF).
TONE SWITCH
When
in
the
ON
(up)
position,
this
switch
causes
the
amplifier
section
to
operate
with
a
flat
frequency
regard-
less
of
the
tone
control
settings.
Use
this
switch
to
check
the
audio
characteristics
of
your
listening
room
such
as
when
it
is
necessary
to
check
the
tone
quality
of
phono
cartridges
and
speakers
and
also
to.particularly
set
the
tone
controls
to
be
assessed,
TS
SE
I
10
TREBLE
CONTROLS:
Adjust
treble
tone
quality.
10KHz
.....
For
the
high
frequencies
above
2.5kHz.
Possible
up
to
10dB
of
increasing
or
reducing
in
treble
response
at
10KHz
in
2dB
steps.
20KHz
.....
After
adjustment
by
the
10kHz
control,
further
adjust
frequencies
above
12kHz
by
this
control,
if
necessary.
Possible
up
to
SdB
of
increasing
or
reducing
in
treble
response
at
20k
Hz
in
2.5dB
steps.
AUDIO
MUTING
BUTTON
—20dB
Depress
this
button
to
mute
the
audio
input
to
—20dB.
No
need
to
turn
down
the
VOLUME
control
on
each
occasion
for
your
convenience.
TAPE DUPLICATE SWITCH
Leave this switch in the ON (down) position to duplicate
or edit a recorded tape using two tape decks. For normal
use, switch over to the OFF (up) position.

——FM TUNING METER
While getting the SIGNAL meter needle going to the right,
make fine adjustment with the FM TUNING meter whose
needle comes to the center (indicating the optimum
reception).
FM STEREO INDICATOR
TUNING KNOB.
BALANCE CONTROL
Adjusts
the
balance
between
the
sound
volume
from
the
left and right speaker systems.
-|—TAPE MONITOR (1, 2) SWITCHES
Monitor the recorded sound while recording with a tape
deck. Also possible to play back tapes as follows:
V evisises ere With a tape deck connected to the TAPE
1 jacks (REC and PB), either monitoring
of recording in progress or playing back is
possible.
Bais grave ial With a tape deck connected to the TAPE
2 jacks (REC and PB or REC/PB con-
nector), the same as in 1 above is possi-
ble.
DOLBY NR ADAPTOR SWITCH
When employing Dolby Noise Reduction Adaptor
depress
this
DOLBY
NR
ADAPTOR
to
ON.
PIONEER
FUNCTION
SELECTOR
BUTTONS
For selecting the program source, push each button as
follows:
eee
For
AM
broadcast
reception.
FM sis aiek ee For FM_ broadcast reception. The
STEREO indicator lights up when the
broadcast is in stereo.
PHONO 1 ... For operating a turntable connected to
the PHONO 1 input jacks.
PHONO 2 ... For operating a turntable connected to
the PHONO 2 input jacks,
MIC: Fiano For using a microphone. Not possible to
mix with other program source.
AUX: esas For listening to audio equipment (car-
tridge tape player, TV sound tuner, etc.)
connected to the AUX input jacks.
DIMMER SWITCH
Dims the brightness of the indicator light. Press again to
restore full brightness.
FM MUTING BUTTON
Leave this button undepressed (in the ON position) while
tuning in FM stations, Inter-station noise may interfere
with FM reception while tuning between stations. To
suppress this noise, leave the MUTING button undepress-
ed (in the ON position). If the low signal strength is due
to distance from the transmitter or other influences,
depress this button, at which the weak station will be
heard with the MUTING “OFF.”
LOUDNESS BUTTON
Depress this button to listen at low volume. The human
ear’s frequency response varies according to the listening
volume. The depressed button compensates for hearing
response with emphasis on the bass and treble.
MIC INPUT JACKS
LRiosascce For connecting the left and right channel
microphones.
NOTE:
Use the high impedance (above 20k8) with 6mm diam. phone
plugs.
VOLUME CONTROL
Governs both the volume of sound outputs from the
speaker systems and from the headphones.
MODE BUTTON
Leave this button undepressed (if. necessary, depress this
to release it when already depressed) for STEREO
playback. For MONO playback, depress it. In this case
sterco signals for left and right channels will be mixed into
mono signal which will be heard from the center of both’
speaker systems.
"1

et]
HOW
TO
OPERATE
THE
RECEIVER
PREPARING TO SWITCH POWER ON
Before switching on the power, please set the
various controls as follows:
@
Set the
VOLUME
control
to
MIN
(minimum
—
fully
anticlockwise).
@ Set the BALANCE control to the midway
position,
@ Tum the TAPE and ADAPTOR switches to
OFF (UP).
© Set the TREBLE and BASS controls to the
midway positions (the ‘‘0” positions).
@
Turn
the
TONE
switch
ON
(UP).
© Set the AUDIO MUTING button to OFF (un-
depressed).
© Set the MODE button to STEREO (released/
undepressed).
@ Set the FM MUTING button to ON (released/
undepressed).
It is important to set these controls as indicated to
avoid any inadvertent overload on the receiver
or speakers, etc., when power is switched ON.
FM RECEPTION
1. Depress the FM button for FUNCTION selection.
2. Leave (or reset) the FM MUTING button to ON.
Note, however, that in areas of low signal
strength the signal may be suppressed. In this
case only, the FM MUTING button should be
depressed to the OFF position.
8. Turn the TUNING knob to select your station.
Best reception is obtained when the SIGNAL
meter needle deflects to the extreme right, and
the TUNING meter needle is exactly in the
center, as shown in Fig. 13. If the broadcast is
stereophonic, the STEREO indicator lamp will
come on: it will not illuminate for monophonic
broadcasts.
4. Adjust the loudness of the sound by means of
the VOLUME control, and use the BASS and
TREBLE controls to give the tone quality you
prefer.
TUNING METER
(Both
for
AM
and
FM
Reception)
(Only
for
FM
Reception)
Fig. 13
SIGNAL METER
AM RECEPTION
1,
Depress
the
AM
button
for
FUNCTION
selection.
2.
Turn
the
TUNING
knob
to
select
your
station.
Best
reception
is
obtained
when
the
SIGNAL
meter
needle
deflects
to
the
extreme
right
(see
Fig.
13).
8.
Adjust
the
VOLUME,
BASS,
and
TREBLE
controls
for
the
listening
level
and
tone
quality
of
your
preference.
NOTE:
If,
when
listening
to
either
FM
or
AM
reception,
the
sensitivity
seems
poor,
and
interference
is heavy,
so that
listening
pleasure
is seriously
affected,
refer
to the
section
“ANTENNA
AND
GROUND
CONNECTIONS,”
on page
7
and
make
any
changes
necessary.
RECORD
PLAYING
1.
Set
the
FUNCTION
selector
to
either
PHONO
1
or
PHONO
2,
dependent
upon
whether
the
turntable
you
are
using
is
connected
to
the
PHONO
1 or PHONO
2 input
jacks,
respectively.
2. Operate the turntable to play the record.
3. Adjust the VOLUME, BASS, and TREBLE
controls for the listening level and tone quality
of your preference.
NOTE:
In order to eliminate the unpleasant noise which can mark
the start of playing a record, depress the AUDIO
MUTING —20 GB button, releasing it after the stylus has
performed the run-in, and then adjusting the VOLUME
to give the sound level of your choice.
USING THE AUX JACKS
When playing equipment to which the AUX jacks
are connected, operate as follows:
1. Set the FUNCTION selector by depressing the
AUX button.
2. Operate the audio equipment.
3. Adjust the VOLUME, BASS, and TREBLE
controls for the listening level and tone quality
of your preference.
I
Ne
|
12

ae
RT
ee
eee
aes
13)
ON
HET
USING THE MICROPHONES
1. Connect the microphones to the L (left-channel)
and R (right-channel) MIC jacks.
2. Set the FUNCTION selector by depressing the
MIC button.
8. Set the MODE button to STEREO (released/
undepressed).
4. Adjust the sound level by turning the VOLUME
control to the right little by little. The midway
setting of the BASS and TREBLE controls will
usually be best.
NOTES:
1. It is readily possible for microphones, under certain
conditions of use, to give rise to “howling” feedback
noise.
Be
careful
not
to
raise
the
volume
too
high
when
the
microphones
are
close
to
the
speaker
systems
or
in
a
room
with
a
great
deal
of
resonance.
It
is
most
effective
in
using
the
TREBLE
and
BASS
controls
at
their
“0”
settings,
or
in
switching
the
TONE
switch
ON (UP).
2. When a microphone has only been connected to one
of the microphone jacks (either L or R), sound will
only be heard from the corresponding left-hand or
right-hand speaker systems as long as the MODE
button is set at STEREO. For the sound to be heard
from both speaker systems, the MONO mode should be
selected.
USING TAPE DECKS
Playback
1. According to the TAPE PB (1, 2), DOLBY NR
IN jacks to which the tape deck is connected,
either fhe TAPE MONITOR 1 or 2 switches, or
the ADAPTOR DOLBY NR switches should be
put ON (see Figs. 14 and 15).
2.
Operate
the
tape
deck
controls
to
give
playback.
3. Adjust the VOLUME, BASS, and TREBLE
controls for the listening level and tone quality
of your preference.
NOTE:
Turning the TAPE MONITOR switch ON enables tape
playback whatever the setting of the FUNCTION selector.
TAPEDECK1
TAPEDECK2
TAPE
DECK
3
SX.939
eee
Fig. 15
Recording
As shown in Fig. 16, the receiver TAPE REC
(1, 2), DOLBY NR OUT jacks carry a certain,
fixed level output from the source selected by
the FUNCTION selector, which, once the tape
deck is connected to the appropriate jacks, enables
the selected source to be recorded. The operation
is as follows:
1. Set the FUNCTION selector button for the
source to be recorded.
2. Play the selected program source,
8. Adjust the recording level by means of the
controls on the tape deck, and commence
recording.
NOTE:
The receiver VOLUME, BASS, and TREBLE controls are
completely inoperative — that is they have no affection
the recorded sound — when recordings are being made.
aes
$ ouPLICATE 4
org
|
SIGNAL
SIGNAL
corr Horr lor
TAPETMONITOR — TAPE2MONITOR DOLBY NR
SWITCH—— SWITCH SWITCH
$X-939
Fig. 16
Tape Monitoring
While a recording is being made with the deck,
if the TAPE MONITOR switch is turned ON, the
sound being recorded can be monitored through
the speaker systems.
In this case, if the tape deck is of three-head type,
or if it is equipped with a monitoring capability,
both recording and playback connections must be
made.
13

DUPLICATING OR TAPE EDITING
RECORDED TAPES
By
using
two
tape
decks,
a
recording
of
a
complete
.
FM
broadcast,
say,
can
be
first
made,
and
then
those
items
in
it
which
you
want
for
your
permanent
“tape
library”
can
be
selected
and
re-recorded
on
another
tape.
1.
Connect
the
two
tape
decks
as
shown
in
Fig.
17.
2.
Set
the
TAPE
DUPLICATE
switch
to
the
ON
position.
8.
Select
one
of
the
tape
decks
(1
or
2)to
play
back
the
pre-recorded
tape,
and
use
the
other
tape
deck
to
make
the
copy
recording.
4,
When
recording
with
tape
deck
1,
TAPE
MONITOR
switch
1
should
be
switched
ON
to
monitor
the
sound
being
recorded,
and
when
recording
with
deck
2,
TAPE
MONITOR
switch
2
should
be
switched
ON
for
monitoring
(refer
again
to
Fig.
17).
TAPE DECK 1 — TAPE DECK 2
+—dlorr JOFF
TAPE 2MONITOR _ DOLBY NR
| swiTCH— SWITCH:
SX-939 Fig. 17
VERSATILE
JACKS
FOR
TODAY
AND
TOMORROW
USE OF THE DOLBY NR ADAPTOR JACKS
If
a
DOLBY
adaptor
is
connected
to
the
receiver
DOLBY
NR
ADAPTOR
jacks,
not
only
can
FM
Dolby
broadcasts
be
played
back,
but
if
a
tape
deck
is
connected
to
the
adaptor
itself,
Dolby
system
recording
and
playback
is
possible.
Reception
of
FM
Dolby
Broadcasts
Reception
and
playback
of
Dolby
system
FM
broadcasts
is
done
with
connections
made
as
follows:
1.
Connect
the
Dolby
adaptor
as
shown
in
Fig.
18
to
the
DOLBY
NR
ADAPTOR
IN
and
OUT
jacks.
2.
Set
the
FUNCTION
selector
to
FM
by
depressing
the
FM
button,
and
tune
in
to
an
FM
Dolby-
system
broadcast.
8.
Tum
the
ADAPTOR
DOLBY
NR
switch
to
ON.
jOFF
Lar TMontron
SWITCH
FUNCTION on
SELECTOR q Sanat
1 FM
DOLBY ENCODED
FM STEREO
BROADCAST
DOLBY
NR
SWITCH
$X-939
Fig. 18
Dolby
System
Recording
and
Playback
with
Tape
Decks
Dolby
Recording
1.
As
shown
in
Fig.
19,
connect
the
Dolby
adaptor
output
jacks
to
the
tape
deck
recording
input
jacks
(LINE
INPUT).
2.
Select
the
program
source
of
your
choice
with
the
FUNCTION
selector.
Dolby
Playback
1.
Connect
the
tape
deck
playback
output
jacks
(LINE
OUTPUT)
to
the
input
jacks
of
the
Dolby
adaptor.
2.
Turn
the
ADAPTOR
DOLBY
NR
switch
to
ON,
and
playback
your
Dolby-system
recordings.
NOTES:
1. If you monitor the sound being recorded with the
Dolby adaptor, turn the ADAPTOR DOLBY NR
switch ON.
2. For detailed instructions on connections, etc., for
your Dolby adaptor, please see the instruction manual
provided with it.
TAPE DECK
FUNCTION
SELECTOR
signal
DOLBY NR SWITCH
SX-939
Fig. 19
14

SETTING UP A 4-CHANNEL SYSTEM
As shown in Fig. 20, a 4-channel system consists
of two pairs of left-hand and right-hand speakers,
one at the front, and the other at the rear. This
gives a whole new dimension of realism not
attainable with conventional 2-channel stereo.
It offers the sense of the acoustics of the hall— and
the atmosphere and applause — where the recording
was made,
The unique sense of “presence” of being “actually
there” which 4-channel stereo alone can give,
has
to
be
experienced
before
it
can
be
appreciated.
The
receiver
will
form
the
ideal
heart
of
a
4
channel
system,
but
you
will
also
require
four
speaker systems and a 4-channel decoder/power
amplifier (‘‘decoder-amp” below) for the rear
channels.
Operation
1. Connect the receiver DOLBY NR ADAPTOR
OUT jacks to the decoder-amp INPUT jacks.
2. Connect the receiver DOLBY NR ADAPTOR
IN jacks to the decoder-amp OUTPUT jacks.
3. Turn the ADAPTOR switch to ON.
4. You are now ready to enjoy the thrill of 4-
channel reproduction.
Placement
of
Your
Speaker
Systems
As
shown
in
Fig.
20,
two
pairs
of
speaker
systems
are
located
to
the
front
left
and
right,
and
the
rear
left
and
right
(four
in
all).
Connect
the
speakers
located
in
FRONT
to
the
receiver,
and
the
REAR
speakers
to
the
power
amplifier
for
the
rear
channels.
It
is
also
possible,
according
to
the
restrictions
of
space
or
personal
taste,
to
place
the
speakers
as
shown
in
Fig.
22.
4
CHANNEL
DECODER
AMP
REAR
SPEAKER
POWER | FRONT SPEAKER
on AMP.
E RIGHT
‘SX-939
—— ee ee ee ee | ONCE
USE OF THE 4CH MPX OUTPUT JACKS
Whenever
4-channel
multiplex
discrete
FM
broad-
casts
may
commence,
the
addition
of
a
4-channel
discrete
FM
broadcast
adaptor
(“‘adaptor”
below)
will
enable
full
4-channel
reproduction
of
the
broadcasts from your receiver.
1. The adaptor is connected as shown in Fig. 21
to
the
4
CH
MPX
OUTPUT
jack
of
the
receiver.
2.
Connect
the
adaptor
output
to
the
receiver
DOLBY
NR
jacks.
Tum
the
ADAPTOR
switch
ON.
.
Depress
the
FM
button
for
FUNCTION
selection.
.
Tune
in
to
the
4-channel
discrete
FM
broadcast.
.
Adjust
the
VOLUME,
BASS,
and
TREBLE
controls
for
the
listening
level
and
tone
quality
of your preference.
OO oo
NOTE:
For
detailed
instructions
on
connections,
etc.,
see
the
instruction
manual
with
the
adaptor.
4.-CHANNEL
DISCRETE FM
BROADCAST ADAPTOR
‘our!
4cH
REAR
REAR AMP_ SPEAKER
4-CHANNEL
DISCRETE FM.
BROAOCAST
DOLBY NR SWITCH
a H.
FRONT LEFT FRONT RIGHT
REAR LEFT REAR RIGHT.
i CH.4
REAR
Fig. 22
15

ee
a
a
CONDITIONS
FREQUENTLY
MISTAKEN
FOR
MALFUNCTION
duced in hi-fi acoustic units result from external
sources of noise: Due to the inherent high sensi-
tivity and the high fidelity in reproduction, the
unit amplifies and reproduces extraneous noises,
however small, into definite output noise. If your
receiver produces a noise, check according to the
following table and trace out the source of noise
for
the
appropriate
corrective
action.
Noise:
There
are
a
variety
of
noises
relating
to
the
-
operation
of
a
hi-fi
unit.
These
are
generally
divided
into
two
types;
(1)
the
unit
is
faulty
(a
transistor
or
part
has
deteriorated)
and
(2)
an
external
source
is
adding
to
the
unit.
When
a
hi-fi
unit
produces
an
unpleasant
noise,
it
is
often
assumed
that
the
unit
is
faulty,
but
statistical
records
indicate
that
the
majority
of
noises
pro-
SYMPTOM
SUSPECTED
SOURCE
OF
NOISE
DIAGNOSIS
AND
REMEDY
Continuous
or
intermittent
+
Static
(lightning)
In
many
cases,
it
is
very
difficult
to
remove
the
source
noise
like
jjijjj
or
zzzzzz.
+
Fluorescent
lamp,
motor,
or
thermostat
|
of
noise.
In
order
to
make
the
radio
input
larger
than
may
be
in
use
in
house
or
in
the
vicinity
of
|
the
noise
level,
set
up
a
good
outdoor
antenna
and
ra)
the
house.
make
a
complete
grounding.
Q
-
:
mI
<
|
When
a
station
is
tuned
in,
|
+
Poor
fluorescent
lamp,
motor,
or
electric
|
Reversing
the
line
plug
may
occasionally
alleviate
this
|
8
|
hum
is
mixed
in
the
pro-
|
heater
may
be
in
use
in
house
or
near
the
|
noise
problem.
Usually
it
is
very
difficult
to
eliminate
S
|
ram.
house.
the
noise.
s
Hissing
sound
noise
in
AM
+The
frequency
of
an
adjacent
station
is
Impossible
to
remove
such
interference.
If
the
case
of
°
(medium
wave)
reception.
fering
with
that
of
the
station
being
—
such
noi:
in
the
TV
set,
incr
e
the
distance
be-
F
tuned
in
(10kHz
beat
interference).
.
“I
+
TV
set
is
on
in
the
same
house
with
the
<
receiver.
5
=
5
Static
noise
(in
particular,
+
White
noise
generated
from
automobile
|
In
an
area
surrounded
by
hills
or
high
buildings,
the
|
when
automobiles
run
|
engines.
FM
input
signals
are
very
weak.
Thus
the
noise
limiter
=
|
close
to
the
house).
<High
frequency
sewing
machine
or
weld-
|
in
the
circuit
loses
its
function.
Set
up
an
FM
outdoor
Fd
ing machine
being
used
near your
house.
| antenna
having
many
director
elements,
=
Reception
of
FM
st
+
Note
that
the
serv
covered
by
an
|
Increasing
FM
input
signal
may
alleviate
this
problem.
program
contains
more
FM
stereo
broadcast
is
about
50%
of
that
|
Use
an
exclusive
FM
outdoor
antenna
instead
of
the
noise
than
FM
mono
pro-
of
a
regular
mono
broadcast.
|
indoor
T-type
antenna.
gram.
|
Hum
or
buzz.
When
|
+
Poor
connection
of
shielded
wire.
(a)
Correct
the
conditions
stated
in
(a),
(b),
(c)
or
(d).
In
& | switched
to radio
recep-
| + Jack connection
is loose.
(b)
case of (e), report
it to an official
activity,
&
|
tion,
the
noise
disappears.
|
+
Line
cord
of
fluorescent
lamp
is
near
the
oo
shielded
wire.
(c)
a
+ Poor grounding.
(d)
|
oO
+
Ham
transmitting
station
or
TV
transmit-
g
ting station
is near your house.
(e)
%
|
ourput
tone
quality
is
|
-
Stylus
wears
out.
(a)
Check
(a)
through
(e)
and
correct
the
condition.
| poor and mixed
with noise.
| - Record
wears
out. (b)
= | Treble
is not clear.
+ Dust adheres
to stylus.
(c)
a
+
Stylus
is
improperly
mounted.
(d)
3
+
Stylus
pressure
is
not
proper.
(e)
+
The
TREBLE
level
is
too
high.
Lower
the
TREBLE
level.
WATCH
FOR THE
FOLLOWING
CONDITIONS;
THESE
ARE
ALSO
APT
TO BE MISTAKEN
FOR
MALFUNCTIONS,
SYMPTOM
SUSPECTED
SOURCE
OF
NOISE
DIAGNOSIS
AND
REMEDY
Power
is not turned
on | - Fuse blows.
(a)
Check
(a) and (b) and correct
the condition.
although
the
power
switch
|
-
Line
plug
is
loose,
(b)
i
is set to ON.
|
=
—.
-
In
playing
@
record,
in-
|
-
Distance
between
the
turntable
and
the
|
Change
the
distance
or
rearrange
the
installation
creasing
the
volume
causes
|
speakers
is
too
short.
increase
of
the
unit
and
speakers.
(Installing
the
howling.
+The
place
on
which
the
turntable
or
|
turntable
on
a
firm,
solid
stand
may
alleviate
this
speakers
are
set
is
unstable.
problem.)
i Do not enhance
the BASS
sound
level excessively.
16

PIONEER
MOUNTING TEMPLATE
90 (3-9/16)
me (2-3/8)
'
Cutout in shelf for ventilation
1
ae |
410
(16-1/4).
49.66 (3/8)
33 (1-5/16)
CLE T Ae LEAL
Amplifier is mounted.
‘510 (20-1/16)
Cutout for front panel mounting in cabinet (Horizontal)
(Can also be used for vertical mounting)
1
UNIT: mm (inch)
Remove the four feet on the bottom plate of the unit.
After removing feet, fasten setscrews into holes from which feet were removed.
413 (16-1/4)-
Front panel of unit.
Slight Clearance
The
top
of
the
shelf
must
not
be
Shelf
(Panel)
higher than the cutout
Setscrews
Use M4 (ISO) setscrews of within 10mm (1/3") long for combining amp’s bottom
plate with any panel, allowing a slight clearance.
17

a
SPECIFICATIONS
Semiconductors
FETs
.
3
ICs...
4.
Transistors.
nee
e
cece
renee
57
Diodes
co.
5
02a
te
sip
eisie
niin
Beis
bg
re:
B50
39
Power Amplifier Section
70 watts*per channel, min. RMS at 8 ohms or 80
watts” per channel at 4 ohms from 20 Hertz to
20,000 Hertz, with no more than 0.3% total
harmonic distortion.
Continuous Power Output at 1,000 Hertz
(Both channels driven) ..... 75 watts per channel (8 ohms)
100 watts per channel (4 ohms)
Total
Harmonic
Distortion
(20
Hertz
to
20,000
Hertz)
SECET
OTE
TIRE
ik
No
more
than
0.3%
(Continuous Rated Power Output)
No more than 0.05%
(1 watt per channel Power Output, 8 ohms)
Intermodulation Distortion . . . No more than 0.3%
(Continuous Rated Power Output)
No more than 0.05%
(1 watt per channel Power Output, 8 ohms)
Frequency Response .........-55 7 Hertz to 100,000 Hertz
Input Sensitivity/Impedance
POWER AMP IN... 2... 0.00 e eee ee eee 1 V/SOk ohms
Output Speaker ..... vee eee es A,B,C, AtB, AtC, B+C
Headphone ........eceeee eens Low impedance
Damping Factor (1,000 Hertz, 8 ohms)... . . Saesesir GAS)
Hum
&
Noise
(IHF,
short-circuited,
A
Network)
.
ee
ree
110dB
Preamplifier Section
Input
Sensitivity/Impedance
PHONO
1
00...
cece
eee
eee
e
cece
ene
2.5mV/SO0kQ.
PHONO
2:
needa
Sedies
seve
ee
ees
2.5mV/50kKQ
PHONO
Overload
Level
(rms/p-p)
250mV/700mMV
MIC:
creche
eiba
ste
6
bapa
spose
y
2.0mV/S0kQ.
AUX
..
6.6.
-
150mV/70kQ
TAPE
PB
1,
2
150mV/70kQ
TAPE
PB
2
(DIN
connector).
...........5-
150mV/70kQ
Output
Level/Impedance
TAPE
REC,
2)
scien
tes
ee
tees
eas
we
150mV
TAPE
REC
2
(DIN
connector)............--
30mV/80kQ.
PRE
OUT
occ
ccc
cece
ce
te
ee
tet
onee
1V/1kQ
Harmonic
Distortion
(20Hz~20kHz)
Less
than
0.1%
Frequency Response
PHONO
(RIAA
equalization)
........
30Hz~1SkHz
£0.3dB
AUX;
TAPE
PB).
25%
asia
cup
tusteeead
e's
10Hz~40kHz*°
dB
Tone Control +
BASS:
MAIN...........2...20008
+10dB
(100Hz)
Measured
pursuant
to
Federal
Trade
Commission’s
Trade
+5dB (SOHz) Regulation rule on Power Output Claims for Amplifiers.
+10dB (10kHz)
+5dB (20kHz)
18
TREBLE:

aa
es
IONE
ER
Filter
LOW: CUE ici6 9 055 oe dS pcan cbeds —8dB (SOHz) 6dB/oct.
HIGH Cut i oss eek iy aes —9dB (10kHz) 6dB/oct.
Loudness Contour (Volume control set at .
—40dB position)........... +8dB (100Hz), +4dB (10kHz) .
Hum & Noise (IHF, short-circuited A,Network)
PHONO More than 70dB
MICs.
dee
actrety
Mee
tatioe
geo
88
.
-
More
than
65dB
AUX, TAPE PB . More than 95dB
Muting
—20dB
FM Section
Usable Sensitivity (IHF).......... wees 1.8uV
Capture Ratio (IHF) ........ . 1.0dB
Selectivity (IHF) ........ 80dB
Signal-to-Noise Ratio. ..... 70dB
Image Rejection (98MHz) .. 85dB
IF Rejection (98MHz) . . 100dB
Spurious Rejection ... . . 100dB
AM Suppression ..... . ceva SSEB.
Harmonic Distortion: MONO Less than 0.2%
Less than 0.4%
. 20Hz~15kHz*9:3 dB
50H2~10kHz*9? dB
Stereo Separation: kHz... . More than 40dB
50Hz~10kHz . . More than 30dB
Sub Carrier Suppression... 6... cece eee cee eee
Antenna Input
STEREO.
Frequency Response
75Q Unbalanced
MUNG 3.4 sie tine ts mts ee Ca stoee ts S Sam se ON-OFF
AM Section
Sensitivity (IHF, Ferrite antenna)............... 300uV/m
(IHF, Ext. antenna)... 0.0... 0.00.00 ee 15uV
SOlSCtVity og: srtzasie fa jaca, v cestearo Bahco, pr azhvece biaee 5 ooy ele ce 40dB
Signal-to-Noise Ratio . wane
Image Rejection .
IF Rejection ....
Miscellaneous
Power
Requirements
........
AC
120V
60Hz,
220V
50/60Hz
or 110, 120, 130, 220 and 240V (switchable) 50/60Hz
Power
Consumption
..
470W
600W (Manufactured for England)
Dimensions
...........4.
520
(W)
x
175
(H)
x
420
(D)
mm
20-1/2 x 6-7/8 x 16-9/16 in.
Weight:
Without
Package
.............
18.5kg
(40
Ib
11
oz)
With Package ............... 22.6kg (49 Ib 12 0z)
Furnished Parts
FM
T-type
Antenna
..
0.0...
2
cee
eee
ee
eee
ee
1
Operating Instructions... 2... eee eee eee eee 1
Fuse
6A
Fuse 3A
NOTE:
Specifications and the design subject to possible modification without notice due to improvements.
19

PIONEER
ELECTRONIC
CORPORATION
4-1,
Meguro
1-Chome,
Meguro-ku,
Tokyo
153,
Japan
U.S.
PIONEER
ELECTRONICS
CORPORATION
75 Oxford Drive, Moonachie, New Jersey 07074,U.S.A.
.
PIONEER
ELECTRONIC
(EUROPE)
N.V.
Luithagensteenweg no. 3, 2030 Antwerp, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD.
178-184
Boundary
Road,
Braeside,
Victoria
3195,
Australis
Printed in Japan <ARB-099-D>
=
+————
j+—__+
—_|—_1 lt