Pioneer SX-1010 User Manual

STEREO RECE IVER

s x - i o i a

OPERATING INSTRUCTIONS

F GN

OiD P IO N E E R

LINE VOLTAGE A N D FUSE A ND 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-1010 is quite the same for each version. However, each rear panel differs according to LINE VO LTAGE and FUSE designed for each version. Fig. A shows the LINE VO LTAG E of a 220V only model.

Fig. B shows the LINE VOLTAGE and FUSE of a 5 line voltage model (110V, 120V, 130V, 220V, 240V) whose line voltage and fuse can be changed and set as follows:

22 0V model

AC IN L ET

Fig. A

5 Line Voltage model

CHANGING LINE VOLTAGE SETTING AND FUSE

To remove the fuse, turn' 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

2A fuse is to be used for either 220V or 240V

operation and a 4A fuse 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.

Fig. B

CONTENTS

Features...........................................................3

Essentials You should Know Connection Diagram Stereo System Setup Speaker Connections Antenna and Ground Connections

Stereo System Connections

........................................4

......................................6

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..................7

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Front Panel Facilities......................................10

How to Operate the Receiver Versatile Jacks—for Today and

Tom orrow

Conditions Frequently Mistaken for

Malfunction

Mounting Tem plate Specifications

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........................................17

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PIONEER

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-1010, latest components and circuit technology have been employed to bring all these values close to their theoretical limits: three 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-1010’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 four 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 1C (replacing six transistors) in a bridge configuration.

All IC-Equipped AM Section With Linear Dial

Only very few receivers can boast a linear station dial even on AM — the SX-1010 is one of them. The AM circuitry uses integrated circuits in all stages for sensitive, stable and clear reception.

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 extra large 18,000μΡ capacitors. This results in a tremen

dous reserve of power for transient peaks, but also elimi

nates the irritating switching noise often encountered in

less professional 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” O f 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 20kFlz in 2.5dB steps. All tone controls can be removed from the circuit (by setting the TONE switch 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-1010 gives you complete mastery over what you hear.

Direct-Coupled Power Am plifier Supplies High

Output Power With Minimum Distortion

An all-stage direct-coupled design with two differential amp stages and three Darlington circuits, purely complementary and without output capacitors (OCL), the amplifier delivers a floor-shaking — watts of music power (or 100W per channel rms, between 20Hz and 20kHz, at under 0.1% harmonic distortion). The power reserve is, in a single word, abundant.

... Plus A Wealth Of Auxiliary Features

And Circuits

Dolby* inputs and outputs permit connection 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-1010 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.

ESSENTIALS YOU SHOULD KNOW

PLACEMENT OF YO UR RECEIVER

The SX-1010 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,

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 o f “ clicks” due to relay contacts opening and

closing within the receiver, this can be an indica

tion 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.

CON N EC TIO N DI A G R A M

OUTDOO R FM ANTE N N A

T-TY PE FM ANTE NNA

AM ANTE N NA

This switch is provided on sets delivered to certain countries. If included on the rear panel of your set, employ the switch in event high frequencies seem weak. Position the switch to either 50 m s or 75 μ5. Employ the 25 m s position only when receiving a D olby* system FM broadcast (pre-emphasis: 2 5 M sec.). A Dolby NR Adapter Unit

(separately sold) is required in

this case. See adapter instruc tion manual for description of connection and operation.

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 A ND POWER IN JACKS on page 9.

I PIONEER

TU R N TABLE

Connect to ground terminal of turntables, tape decks etc.

TUR NTAB LE

CAR TRIDGE TAPE PLAY ER

TAPE DECK (open-reel, cassette)

—AC OUTLETS—

TAPE DECK

For connecting 4-channel discrete FM broadcast adaptor

For connecting 4-channel adaptor

R CH

For connectinq Dolby NR adaptor

• m

m m

L CH R CH L CH

(A)

SPEAKER SYSTEMS

(B)

FUSE

® φ

RCH L CH

(C)

STEREO S YS TE M SETUP

Your SX-1010 is ideally suited to form the heart of a stereophonic reproduction system o f the very highest quality. Use it, as shown in Fig. 1, with the

speaker systems and other components of your

choice, including turntable, tape deck (either

open-reel or cassette type), etc. The SX-1010 can

also be used as part of the following systems:

• Multi-amplifier systems,

• Four-channel playback systems,

• Four-channel FM multiplex reception,

• Dolby system broadcasts, playback, and record ing.

TUR N T ABLE (open-reel or cassette)

TAPE DECK

CAR T RID GE TAPE PLAY ER

MICROPH ONES

I f '

(B)

SPEAKER SYSTEMS

Fig. 1

SPEAKER C ON NE C TIO NS

SPEAKER SYSTEMS CONNECTIONS

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. 2, the upper (red) socket 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.

SPEAKER OUTPUT TER M INALS

RIG H T CHA N NEL Π β Π Ρ Ι Π LE FT CHANNE L

RIGHT SPEAKER

SYSTEM

LEF T SPEAK ER

SY STEM

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 8Ω. If systems with impedances below 8Ω are used, the protection circuit of the receiver may

operate to prevent audition.

Speaker Terminal and Lead-Wire Connections

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. L ift 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.

1 Omrr—*|

(a )

Remove insulation from wire end.

Twist stranded wire.

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 comers of an equilateral triangle.

+ 14 hidden pages