Pioneer SX-3900 User Manual

FM Quartz Lock

STEREO RECEIVER

OPERATING IN S TR U CT IO N S

Walnut grained vinyl top and side panels are used in the construc tion of this cabinet.

IMPORTANT NOTICE

The serial number for this equipment is located on the rear panel. Please write this serial number on your enclosed warranty card and keep in a secure area. This is for your security.

WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOI

STURE.

Οΰ P IO N E E R

SA F E T Y I NST RUCTIONS

READ IN S TR U C T IO N S — All the safety and operating instruc

tions shoulid be read before th e appliance is operated.

R E TA IN INS T R U C T IO N S — The operating instructions should be

retained fo*r future reference.

HEE D W A R N IN G — All warnings on th e appliance and in the

operating imstructions should be adhered to.

FO LLO W IN S T R U C T IO N S — All operating and use instructions

should be fo llow e d .

W A TER AN D M O IST U R E — T he ap pliance should not be used

near w a ter — for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming po ol, etc.

LO C A T IO N — The appliance should be installed in a stable loca

tion.

W A L L O R C E IL IN G M O U N TIN G - The appliance should not

be m ou nte 'd to a wall o r ceiling.

V E N T ILA T I O N — The appliance should be situated so that its

location ocr position does not interfere with its prop er ventila tion. F o r exa m p le, the appliance should not be situated on a bed, sofa, rug, o r similar surface th a t m ay block the ventilation openings; <or, placed in a built-in installation , such as a book  case or caibinet that may impede the flow of a ir th ro ugh the ventilation openings.

H E A T — Thie appliance should be s ituated aw ay from heat sources

such as raidiators, heat registers, stoves, or other appliances (in cluding anmplifiers) th a t produce heat.

POW ER S O U R C E S — The appliance should be connected to a

pow er supip ly only of the type described in the operating in structions o r as m arked on the appliance.

G R O U N D IN 'G — The precautions tha t should be take n so th at

the ground ling of an appliance is not defeated.

PO W E R -C OR D P RO T E C T IO N — Power-supply cords should be

routed to that th e y are not likely to be walked on or pinched by items pla c ed upon or against them, paying pa rticular atten tion to co rds at plugs, convenience receptacles, and th e point where they exit from the appliance.

C L E AN ING — The appliance should be cleaned only w ith a polish

ing cloth <or a soft dry c loth. Never clean with furniture w ax, benzine, in secticide s or oth er volatile liquids since they may corrode t h e cabinet.

POW ER L I N E S — An o utd oor antenna should be located aw ay

from powerr lines.

NONUSE P E R IO D S — T he pow er cord of th e appliance should

be unpluggied from th e outlet wh en left unused for a long period of tim e.

OBJE CT A N D L IQ U ID EN T R Y — Care should be taken so that

objects do not fall and liquids are n ot spilled into the enclosure thro ugh openings.

D A M AG E R E Q U IR IN G S E R VIC E — The appliance should be

serviced b v Pioneer authorized service center or q ualified service personnel w h e n :

• The p owtsr-s upply cord or the plug has been damaged; o r

• Objects have fa llen, or liquid has been spilled into the a ppli ance; o r

• The appl ance has been exposed to rain ;or

• Th e appHiance does not appear to operate norm ally or ex hibits a m ark e d change in performance; or

• The appl I ance has been d ropped, or the enclosure damaged.

S E R V IC IN G — Th e user should not attempt to service the app li

ance beyond tha t described in the operating instructions. All other servicing should be contacted nearest Pioneer authorized service center.

O U T D OO R A N TE N NA G R O U N D IN G - If an outside antenna

is connected to th e antenna term in a l, be sure the antenna sys

tem is grounded so as to provid e some protection against v olt

age surges and built up static charges. Section 8 1 0 of the Natio  nal Electrical Code, A N SI/N E P A N o. 70-1978, provides in fo rma

tion w ith respect to proper grounding of the mast and support

ing structure, grounding of th e lead-in w ire to an antenna dis

charge u nit, size o f grounding conductors, location o f antenna- discharge u nit, connection to grounding electrodes, and require

ments fo r the grounding electrode. See Fig. A.

EXAM P L E O F A N T E N N A G R O UN D IN G AS

PER N A T IO N A L E LEC T R IC A L CODE IN S T R U C TIO N S

To Antenna term inal

Ground clamps

Grounding electrode driven 8' into th e earth (2 .44 meters)

Fig. A

a) Use No. 10 A WG copper or No. 8 AWG aluminum or No.

17 A W G copper-clad steel or bronze w ire, or larger as ground

wires for both mast and lead-in.

b) Secure lead-in w ire from antenna to an tenna discharge unit and

mast ground w ire to house with stand-off insulators, spaced from 4 feet (1 .22 meters) to 6 feet (1 .83 meters) apart.

c) M ount antenna discharge unit as closely as possible to where

lead-in enters house.

CO NT E NT S

Featu re s ........................................................

Rear Panel F a cil itie s

Connection D iagram ................................ . . 5 A M Reception

Conne ctions .................................................

Anten na and G round Connections . .

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

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, . 3

. 4

. . 6

. , 3

Before O p e r a tio n FM Reception

Playing R e c o rd s

Using the A U X ja ck s .................. ..................14 Troub leshoo tin g

Effe ctiv e Operation

FEATURES

DC-Configured Power Amplifier Using a Won-Switching Amplifier System

Featured in the power amplifier section is a Non Switching A mp lifie r system. This is an am plifier with a new type of output stage which controls the o utp u t transistor bias at a high speed in accordance w ith the level o f the output signals (with the high-speed bias servo circuit) in order to prevent the ou tpu t transistors from being set to the cu t-off mode. This system ends transistor switching distortion and helps eliminate higher harmonic distortion. Its efficiency is on a par w ith that o f a class B am plifier and it displays the same high level o f quality as a class A ampli

fier. As a result, it delivers a

Co n ti n uo u s P ow e r O u tp u t of 1 2 0 w atts*pe r c h an  ne l, m i n ., at 8 o hm s f r om 20He rt z t o 20,000 H e rt z w it h no more th an 0.0 0 5 % t o t al h a r m o  nic d i s to r t i o n .

Another feature is the skived heat sink, w ith a highly efficient heat dissipation effect and a light weight, which has been given a chimney construction. Even when the receiver is being run continuously under full power condi

tions, this heat sink keeps the temperature rise down and provides high quality and high power listening.

Quartz-locked FM Tuner for Accurate and Stable Reception

The fro nt end employs a 4-gang variable capacitor and dual-gate MOS FET in order to yield a high level o f sensi tivity and effective interference rejection. Featured in the intermediate frequency stage is three dual element ceramic filters w ith an outstanding group delay response and a differential amplifier 1C between the stages. This configura tion helps provide an excellent selectivity and distortion.

The quartz lock system adopts a crystal detector using a quartz crystal as the reference element, and when part o f the interm ediate frequency signal is passed through this

detector, the deviation in the oscillation frequency o f the local oscillator caused by shifts in the temperature or hum idity is detected and this deviation in the frequency is offset. This means that whatever the frequency, the tuner is fully locked to the signal of the broadcasting station and that stable reception is assured.

The MPX section employs a double chopper type of

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dem odulator to yield a high signal-to-noise ratio and a low distortion as well as a wide dynam ic range. This means that a high separation response is produced even w ith over modulation. Another attraction is the adoption of a fu ll auto pilot canceller circu it which tracks the pilot signal level and helps improve the high-range frequency response.

Fluorescent Display Tubes for Power Meter and Frequency Indicator

tube using the latest digital technology, a logarithmic compression circu it and a peak hold circu it. This com bination allows a power output level display from 0.001 watts up to 120 watts w itho ut range selection on a bar graph display.

reception frequency display based on a fluorescent display tube. This indicates the frequency of the broadcasting station in five digits so that it is easy to tune in a station quickly. The tuning meter and signal meter also use new indicators w ith fluorescent display tubes.

Preamplifier Guaranteeing High-fidelity Sound

Reproduction

distortion ICs assures a low d isto rtion of 0.005% (from 20Hz to 20,000Hz, 10V output). The equalizer am plifier

also em ploys low-noise transistors and also high-precision capacitors and resistors to deliver top-notch characteristics such as an RIAA deviation of ±0.2dB over 20 to 20,000Hz, a signal-to-noise ratio of 86dB and a maximum allowable input o f 300mV.

Full Complement of Accessory Functions

• Self-illuminating switches: The function selector and

• Brightness selector: This selector allows the brightness o f

• AM STEREO OUT jack: Connect your stereo adaptor to

* Measured pursuant to the Federal Trade Commission’s Trade

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..................13 Using the PREA M P O UT and

..................14

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..................15

Featured for the power meter is a fluorescent display

In addition to the conventional dial scale, there is also a

The tone amplifier which employs low-noise, low-

the speaker switches light up when depressed and so exactly what switches have been depressed can be taken in at a glance.

the fluorescent display tubes to be adjusted in line w ith the brightness of the listening room.

this jack when listening to AM stereo broadcasts.

Regulation rule on Power Output Claims for Amplifiers.

Tape Deck O perations ....

POW E R A M P IN Jacks . .

Specificatio n s

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REAR PANEL FACILITIES

® AM BAR ANTENNA

This antenna is for AM broadcasts. When tuning in an AM statio n, first use the tuning knob for fine tuning and then move this bar antenna and set it where the optim um reception is obtained. A t the same time observe th*e signal indicator.

For details., refer to "A M AN TE NN A" on page 9.

® AM STEREO OUTPUT JACK

This jack its for AM stereo broadcasts. When listening the AM stereo broadcasts, connect the adaptor com ponent to this ja ck. For further details, refer to the operating instru ctions of the AM stereo adaptor component.

® PHONO 1 JACKS

Connect th e turntable output cords to these jacks.

(4) GND TERMINAL

This is the ground terminal. Connect the ground w ire of the turnta b le, etc. to this terminal.

(D PHONO 2 JACKS

Connect y our second turntable output cords to these jacks.

(6) AUX JACKS

These are auxiliary input jacks. Connect a TV tuner or cartridge tape player to them.

® PREAMPLIFIER/POWER AMPLIFIER

CONNECTOR BAR

When this connector bar is disconnected from the jacks, you can separate the receiver's pream plifier and power amplifier. For normal use, however, it is connected. For further details on how to use this bar, refer to page

17.

NOTE : If this bar is not connected properly, you will not hear any sound from the speakers connected to the SPEAKERS terminals.

® SPEAKERS TERMINALS A

Connect your first pair of speakers to these terminals.

® SPEAKERS TERMINALS B

Connect your second pair of speakers to these terminals.

® FM ANTENNA INPUT TERMINAL FOR

75-OHM COAXIAL CABLE

Connect a 75-ohm coaxial cable to this terminal when using it as the feeder from the FM antenna.

3000H M TWIN-LEAD FEEDER

Connect a 300-ohm twin-lead feeder to these terminals when using it as the feeder from the FM antenna. Use these terminals when connecting the accessory T-type

FM antenna.

GND TERMINAL

This is the ground terminal. From aspects of both safety and reduced noise, connect a ground lead to this terminal.

@ AM ANTENNA INPUT TERMINAL

When using an external AM antenna, connect it to this

terminal.

® TAPE 1 JACKS

Connect the tape deck cords to these jacks. Connect the REC (recording) jacks to the INPUT jacks on the tape deck, and the PLAY (playback) jacks to the OUTPUT jacks.

REAR PANEL FACILITIES

Connect your second tape deck cords to these jacks.

® ADAPTOR JACKS

Connect the adaptor component or third tape deck to these jacks.

These are spare power outlets. Insert the power plug on the stereo components (turntable, tape deck, etc.) into these outlets. SWITCHED: The power supplied through this

CON N EC TI ON D IAG RA M

FM outdoor antenna

Turntable 1

u n I

T T T f t f

Tu rntable 2

outlet is coupled to the operation o f the receiver's power switch. The maximum power capacity which may be connected to this outlet is 100W.

UNSW ITCHED: The power is always supplied through

these tw o outlets regardless of the position o f the power switch. The maximum power capacity which may be connected to these two outlets is 200W.

® POWER CORD

Plug this into an wall socket.

Speaker systems A

Le ft

Speaker systems B Left

T-tVPe FM antenna _

Ground lead

Coaxial cable

Output

SX -3900

lead feeder

AM outdoor antenna

Ground

Output

TV tuner

j I ■ oooioniinnnnn li Q

AC wall socket

Power

plug

Ground

Tape deck 1

Tape deck 2

(e.g. Reverberation am plifier)

C O N N EC T ION S

PRECAUTIONS

• Set the POWER switch to ON only when you have complened all the connections of the stereo system. Always set this switch to its bottom position (OFF)

if you w ant to change the connections.

• A ll the receiver's jacks are aligned for easy connec tion in two rows: the upper row fo r L (left channel)

and the lower row fo r R (right channel). Always connect L to L and R to R w ith the audio compo

nent output and input jacks.

Make sure that the connections are secure. Improper connections can generate noise or cause the sound to be cut off.

SPEAKER SYSTEM CONNECTIONS (Fig. 1)

The receiver is provided with two sets of SPEAKERS output termiinals. Use the A set when connecting only one set of speakers. Viewed from the fro n t, the R (right channel) SPEAKERS terminals are on the right and the L (left chanrnel) SPEAKERS terminals are on the left. Connect the left channel speaker to the L terminals and

the right channel speaker to the R terminals.

Cautions when connecting the speakers

1. Do not p-lug the receiver's power cord into an wall socket before the speakers are fully connected to the SPEAKER S terminals.

2. The speak er outp u t terminals have polarities: minus

(brown) and plus (red). The input jacks on the speakers also have plus and minus polarities. When connecting, make sure that these polarities are aligned: plus to plus and minus to minus. If the left and right speaker polarities are misaligned, the reproduced sound will not

display a n atural stereo effect.

3. Use speakers with a nominal impedance of 4 ohms or more. If you wan t to use two sets of speaker system, make sure

that the impedance of each system is 8 ohms or more.

If the impedance is less than 8 ohms, the protection

circuit willl be actuated when the volume is turned up and you w ill not be able to enjoy proper stereo perform ance.

4. Never use th e speakers with the speaker output terminals shorted (rminus and plus jacks connected) since this may be damaged the power transistors in the receiver.

5. This receiv er delivers a high output power and so make

sure that yo u use speakers with a high allowable input.

6. The high o u tput power of this receiver requires that the speaker lead wires have an ample current carrying capacity. Use wires w ith a high capacity and connect them securely. If you use low capacity wires and do not connect tlnem properly, the reproduced sound will be adversely affected and heat generation or short circuits may be caused.

SX-39C0

Fig. 1

Processing and connecting the speaker cords

1. Cut o ff the covering of the speaker cords as shown in Fig. 1.

2. I f the strands at the tip of the cord are pointing in all directions, twist them with your thumb and fore

finger. Otherwise some of the strands may come into contact with other terminals and cords, and cause a short.

3. Push the minus (brown) button o f the speaker terminals with your finger and insert the minus speaker lead into the hole above the button.

The lead is locked into position when the button is

released. Check that the lead is connected firmly.

4. In the same way, connect the plus speaker lead to the

plus terminal (red).

5. Check that the core wires of the speaker leads are not projecting from the terminals. If they should come into contact, this w ill give rise to a short circuit.

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