Pioneer sx 980 owners manual 2

Page 1

AM/FM STEREO RECEIVER

X-SB.

OPERATING INSTRUCTIONS

HG

SX-980 is designed to operate from 220V or 240Vmain.
Before turning on the power, please confirm the line
voltage setting indicated on the rear of your unit
correSponds to the supply voltage in your area; if not,
change the setting as described in LINE VOLTAGE
SELECTOR SWITCH on page 19.

CONTENTS
Features ............................. 2
Installation Cautions ..................... 3
Connection Diagram ..................... 4
Connections .......................... 6
Antenna and Ground Connections ............ 8
Front Panel Facilities .................... 10
Prior to Switching Power On ................ 13
FM Reception ......................... 13
AM Reception ......................... 13
Playing Records ........................ 14
Using the Microphone .................... 14
Using the AUX jacks ..................... 14
Effective Operation ...................... 15
Tape Deck Operations .................... 16
Using PRE AMP OUT and POWER AMP IN Jacks. . 17
Specifications ......................... 18
Line Voltage Selector Switch ............... 19
Conditions Frequently Mistaken for Malfunction . . 20

GDPIONEER'

Page 2

FEATURES

Power Amplifier for a Continuous Power Output
of so Watts Per channel and for Ultra-Stable
Sound Reproduction

. The adoption of a singlestagc dirrerenrial amplifier with
low-noise dual transistors, pre-driver stage a current
mirror load and an sew circuit provides a bumper
power output of 30 watts + 80 watts(continuous
power output of 80 watts per channel,
min., at Bohms from 20 Hertz in 20,000
Hertz with no more than 0.05% total har-
monic dlSlDlllOn) which is extremely stable. These
reatures also guarantee a stable operation at all times
from low outputs to high outputs.

The power amplifier is configured as a DC power amplir
fier with the capacitors removed from the NFB circuit
tor a flat gain response all the way rrom the lowest of
the low frequencies up to the audio rreduencies. At rhe
same time, the design is engineered (or low distortion
with the incorporation or newly developed power
transistors.

The largc~slzcd transformer with its superb regulation
employ two 18,000uF largeecapacity electrolytic copaci
tors in the power supply and permit high sound quality
even at lowest frequencies.

lc-Based FM Tuner with High Selectivity,l-ligh S/N
and Low Distortion
. The FM front end incorporates a lrolage RF circuit that
employs a 4gang tuning capacitor and a dualegate
Mos FET for high gain and low noise This config
uration excels in ridding the sound or undesirable
interference for impressive statistics; l.7uy (IHF)
sensitivity, more than lOOdB spurious response ratio
and more lhdrl 90GB image response ratio.
0 The PM lF amplifier combines three dualelement phase-
linear ceramic filters with two lc's which contain
quadrature detectors for a high selectivity (dOdBl and a
low distortion (MONO: 0.l%at lkHz).
The stereo demodulator employs an NFBrIype PLl. MPX
IC with a automatic pilot canceller which automatically
cancels out the pilot signals without reducing the
hlghrend frequency. Thls means that the leak carrier
level is amply suppressed for a tip-top separation and flat
frequency response in the reproduction frequency band.

AM Tuner Includes Newly Developed IC

The tuned AM RF amplifier circuit incorporates a
newly developed highsensitivity, lowdisldrtiori KC and
2-gang variable capacitor. These contribute to enhanced
imaging and RF interference rciection capabilities. Since
the optimum AGC voltage is supplied to each section,

2

stable reception can be obtained with low spurious inter-
ference and distortion even in high field strength areas.

Precise Record Equalization

. A balanced power supply is used in the equalizer amplir
her to obtain a maximum allowable input or zoomyrrns
llkHz), Low distortion record playback can thus be
enioyed even with high output phono cartridges and
music sources containing large peak signals.

- The equalizer elements which are designed to produce
the RIAA characteristics use high-precision parts to keep
the equalizer deviation between onz e ZOkHz down to
:0de for faithful sound reproduction from records.

Other Features

TURNOVER switches: lhcse switches yield Varlations In
the curves of the tone controls when they are operated in
conjunction with the other bass and treble tone controls
One is used for the bass and the other for the treble,
thereby allowing plenty or variation in tone control adjust-
merit.

Highly reliable protection circuitry: in order to protect
the speakers and the power transistors, this receiver features
a newly developed protection [C as well as a special muting
clrcuit that cuts out the noise produced by the on/oif
operation of the power swnch. Needless to say, these are
very dependable and stable protection circuits. in addition,
there is an inrush current suppressor circuit which Supt
presses surges or current when the power is switched on.
FM 25145 switch: The receivers front panel is equipped
wth a darcmphaSls selector switch which is useful when the
receiver is tuned into an FM Dolby Stallon. Thls facilitates
operation when the receiver is set up (or the reception of
an FM Dolby broadcasts

TAPE DUPLICATE switch: This switch allows you to use
two tape decks to edit or duplicate material recorded on
one tape to another, Duplication from an opcnrrecl deck to
a cassette deck, for example, can he performed in a
oncrtouch operation.

Power meters: Each channel has its own power meter
(cow 7 160W display range) with a logarithmic com-
pression scale. These meters feature a rasl response speed,
and they enable you to read out the power values at an
Bruhm impedance across 4 power band stretching from
o OlW up to the maximum output or the receiver.

GkHz (highl and 15m (luwl rllter switches: Featured are
a tilter ior 6dB/octayo attenuation at frequencies below
ISHz in order to eliminate ultrarlow-range noise generated
by warps ln the records, and also a 6kHZ (6dB/0Ct alIeriU'
ationl filter that eliminates highnrenge noise such as that
produced by scratches on the records and his.

Measured pursuant to Federal Trade Cummixsion '3 Trade
Regulation rule on Power Output Claims forArnplrfrere,