Pioneer SX-1280 Manual de usuario

XRABi3

Typo Volr.rp R.mark!

KU 120Vonly U.S.A.rnodel

KC 120Vonly Canads model

110v,120v.22OVand240V(Switchsble) Gen6ralexDortmodel

s/G 1'10V,120V,220V.nd 240V

{$i,itchsbl6l U.S.Milit8rymodel

six-1 eEto

MODEL

SX-1280

COMESINFOURVERSIONS

DTSTINGUISHED

AS FOLLOWS:

NOTICE:

r This

service

manual

applicableto the KUand

types

. Asto theSandS/G

types,

please

refer

to page

81.

CONTENTS

1. SPECIFTCAT|ONS. 3

2, CONNECTIONDIAGRAM 5

3. FRONT

PANEL

FACILITIES 7

4. LEVELDTAGRAM

.... ....... . 10

5. BLOCKDIAGRAM

.... ....... 11

6. CIRCUIT

DESCR]PTIONS

6.1 Tuner

Section ..........13

6.2 AF

Section ......14

6.3 Power

Supply

Circuit

. .....16

6.4 Proteqtion

Circuit.. .......11

7, DTSASSEMBLY ........ 18

8, PARTS

LOCATION

8.1 FrontPanel

View... ......20

8.2 Front

ViewwithPanel

Removed ...........21

8.3 Top

View .......22

8.4 Bottom

View ....29

8.5 RearPanel

View

.. . .. .... 24

9. DIAL

CORD

STRINGING ....

.. 25

IO. ADJUSTMENTS

10.1 FM

Tuner

1O.2 AMTuner

10.3 Power

Amplifier

10.4 MeterAmplifier

11. EXPLODEDVIEWS

11.1 ExternalPart . , .

11,2 lnternalPart

12. PACKING

13. SCHEMATICDIAGRAMS,P.C.

BOARDPATTERNS

AND PARTS

LIST

13.1 SchematicDiagramand

MiscellaneousParts

. .

13.2 TunerAssembly

(AWE-092)

13.3 Microphone

JackAssembly

(GWM-I05)

13.4 Cartridge

LoadAssembly

(cWS-134)

13.5 Function

SwitchAssembly

(GWS-I33)

13.6 EOAmplifier

Assembly

(AWF-031)

. .. ..

13.7 Flat

AmplifierAssembly

(AWG-0601

13.8 Tone

AmplifierAssembly

(AWG-059)

. . ..

13.9 Filter

Amplif

ierAssembly

(AWM-119)

13.10 PowerAmplifier

Assembly

(AWH.074)

13.11 ResistorAssembly

(AWX-I27)

13.12 Meter

AmplifierAssembly

(AWM-I211

13,13 Power

SupplyAssembly

{AWR-I57) . . . .

13.14 'Fuse

Assembly

(AWX-I261

or (AWX-I391

13.15 Protection

CircuitAssembly

(AWM-I23)

ADDITIONAL

SERVICE

MANUAL

1. SPEC|F|CAT|ONS

... . ... ..... 82

2. CONTRAST

OF MISCELLANEOUS

PARTS ,.... 82

3. EXPLODEDVIEW . ... . 84

4. SCHEMATIC

DIAGRAMS,

P.C.

BOARDPATTERNS

AND PARTS

LIST

SchernaticDiagram .. ...... gs

5PConnector

Assembly

(AWX-062)

... .......... g7

Fuse

Assembly

(AWX-134) .......88

NO?E: * .F'nseossembly

(AWX-I26) isapplicable

to theKII type,andAWX-tB9 isfor theKC type.

4.1

4.2

4.3

1.SPECIFICATIONS

Semiconductors

FETS... 5

lCs..... 6

Transistors ......61

Diodes.. ......50

Power

Amplifier Section

Continuous

power

output

of 185watts.

per

channel,

min.,at8 ohms

from20

Hertzto

20,000

Hertz

withn0morethan0.03%total

harmonicdistortion.

Total

HarmonicDistortion

(20Hertzto 20,000Hertz)

ContinuousRated

PowerOutput . .Nomorethan

0.03%

90watts

per

channel

power

output,Sohms . . Nomorethan

0.01%

I watt

per

channel

Power

output,

Sohms . . No

morethan0.01%

IntermodulationDistortion

(50

Hertz:

7,000Hertz

4:1)

ContinuousRatedPowerOutput . .

Nomorethan

0.01%

90watts

per

channel

power

output,

8 ohms No morethan

0.006%

1wattper

channel

power

output,8

ohms Nomore

than0.005%

Frequency

Response

. . ... 5 Hertzto

IO,OOOHertzl!aA

lnputSensitivity/lm

pedance

POWERAMPIN

..... .. lV/5Okilohms

Output

SPEAKERS . . . . . A,B,

C,A+8,B+C,C+A

Damping

Factor

(20

Hertzto

20,000

Hertz,8

ohms)

........... 30

Hum

and

Noise

(lHF,

short-circuited,

A Network).

. 105d8

PreamplifierSection

Input

(sens

itivity/lm

pedance)

PHONO

I .

Cartridgeload

(capacitance)

. . .

PHONO2

t\4tc....

...2.5mV/50kilohms

'100,

200,

300,400pF

. . .2.5mV/50kilohms

. . .7.5mV/50kilohms

AUX... .. 'l50mV/50

kilohms

TAPE

PLAY'1

...... 150mV/50kilohms

TAPEPLAY2...... 150mVi50kilohms

PHONO

Overload

Level

(1kHz;T.H.D:

0.03%)

PHONOl,2...... 300mV

Output

Level/lmpedance

TAPERECl...... ..150mV

TAPEREC2...... 150mV

PREOUT ..... 1V/1kilohms

Total

HarmonicDistortion

(20H2

to20,000H2,1Voutput).. .Nomorethan0.01%

Frequency

Response

PHONO(RIAAequalization).20Hz

to20,000H2

l0.2dB

ToneControl

BASS...

TREBLE.

Filter

LOW

...

sx-,| 480

. ,LlOdB

(l00Hz)

main

control

a5dB

(50H2)

subcontrol

. r10dB (1okHz)

main

control

e5dB (20kHz)

subcontrol

HIGH...

LoudnessContour

(Volume

control

set

. 15Hz

(12dBloct.)

. 8kHz

(l2dB/oct.)

-40dB

position)

. . .. +6dB

(100H2),

+3Og

1'l6kli.1

Hum

and

Noise

(lH

short-circuited,A Network)

PHONO .

AUX,

TAPEPLAY, . .

Muting..

FMTunerSection

UsableSensitivity

t\40No

50dB

Quieting

Sensitivity

MONO..

STEREO.

Signal-to-Noise

Ratio

(at

75dBf)

. . .STEREO.

(at

65dBf)

...MONO..

STEREO.

Distortion

(at

65dBf)

'f00Hz

MoNo/STEREO

.. ..o.1%1o.2%

lkHz MONO/STEREO ... O.1o/o10.'1570

6kHz I\4ONO/STEREO . ... 0.1YolO.2%

FrequencyResponse.. .... .. 3OHzto15,O0OHzl33dB

CaptureRatio ..........1.0dB

AlternateChannelSelectivity .........80d8

SpuriousResponseRatio. .. ........100d8

lmageResponse

Ratio

... ..........90d8

lFResponseRatio... ....110d8

AMSuppressionRatio... ....55d8

Muting

Threshold . . 19.2dBf(5gV)

StereoSeparation. . . 50dB(lkHz),35dB(30H2

- 15kHz)

SubcarrierProductRatio ...........65d8

SCARejectionRatio... ...........65d8

Antenna

Input 300

ohmsbalanced

75ohmsunbalanced

...80d8

. . .95dB

. .-20d8

AUX,TAPE

PLAY . . . 5HztoS0,OOOHZI?dB

AMTunerSection

Sensitivity

(lHF,Ferriteantenna)

... .......

(lHF,

Ext.

antenna).

Selectivity

Signal-to-Noise

Ratio... . . . . .

lmageResponseRatio.. . . . . .

lFResponseRatio.........

Antenna. .. Built-in

300!V/m

.. 15pV

. . .30dB

...50d8

. . .40dB

......40dB

FerriteLoopstick

Antenna

Misdellaneous

PowerRequirements...... .... 120V

60Hz

PowerConsumption..... 430W(UL),1000VA(CSA)

1100W

(max.)

Dimensions .. 556(W)x i86(H)x461(D)mm

21-11/l6(w)

x6-1sll6(H)x17-5l16(D)

WeightWithout

PackaSe.

. 28.7kg

(631b

3oz)

With

Package

FurnishedParts .32.1kg

(701b

10oz)

FMT-typeAntenna ..........1

OperatingInstruclions ........1

Hex.Wrench 1

*Meacurcd pursudnt to the Federal Trade Commission's

Trade Regulation rule on Pouer Output Claifis for

Amplifierc.

NO?E:

Specificotionsdnd thedesign

subjectto possible

modifico-

tion uithout aoticedue to improuements.

HEX.WRENCH

The accessory

hexagonalwrench is provided for removing

the TUNING knob and VOLUME knob or tightening

their setscrewsshould they becomeloose.

If required, loosen the set screw by inserting the wrench

into the hole on the side.of the knob and tuming the

wrench counter-clockwise. Be particularly careful not to

scratchthe front panel when employing the wrench.

2. CONNECTION

DIAGRAM

Turntable

I (PHONO

AM outdoor antenna

Cartridge

type

player

(AUX)

-'--'t

& Grc ou €^L E!

j-,

Turntable

2 (PHONO

300ohm

feeder

T.tvpc FM anicnna FM outdoor antenna

six-1 eElo

Connectthe power plug to the wall outlet because

this

receiver

requires

alotof

Tape deck 1

(TAPE 1) Tape

deck 2

(TAPE

Speakersystems

(SPEAKERS

Dolby*NR adaptor

Right

onm

ial

0re

L-_,

,fi.

/i\

Ac12ov

60Hz

only

Switched Unswitched

SWITCHED:

(50W

max.)

Speakersystems B

(SPEAKERS

Speakersystems

(SPEAKERS

A frequently used component

(turntable,

tape deck,etc.)can be

plugged into this outlet. By leav-

ing the power switch of that

component in the ON position,

power supply to the component

will be coupled with the receiver

switchoperation.

UNSWITCHED: Less

frequently usedcomponents,

(Total lOOW which do not require couplec

max'' power, can be plugged

into either

of these

outlets.

Lef

t Right

* Tlre

word "Dolby" is

a trademarkof Dolby LaboratoriesInc.

3. FRONT PANEL FACILITIES

POWER

SWITCH

Flipthis

switchtothe

ONposition

tosupply

power

tothe

stereoreceiver.

Therewill bea shortdelaywhenit i; set

to ON, becausethe mutingcircuit hasbeen

actuatedto

suppressthe unpleasantnoise

thatissometimes

generated

when

the

power

isswitched

onandoff.

PHONES

JACK

Plugthe headphonesinto this jack when you want to

listen

through

yourstereoheadphones.

Release

the allSPEAKERSbuttonsif you want to listen

to thesoundthrough

your headphones

only (This

means

that

allthreebuttons

will bereleased).

SPEAKERS

BUTT

Press

the button corresponding

to thespeakers

connerrted

to theSPEAKERSterminals

(A, B,C) on therear

panel.

You can presrtwo of thesebuttonsto listen

to sound

from two pairs

of speaker

systemsat thesametime.

NOTE:

No ound utill beheardthrough the speahers

if all lhree

buttou are

p?esed

ot lhe same

time.

BALANCE

CONTROL

Usethir control to balancethe volume

of the left and

right chennels.First, however,

setthe MODE switchto

MONO, and adiust

so that the soundappears

to c,)me

from somewhere

exactly

betweenthetwo speakers.ll the

sound

appears

to be louder

on the

right,

it means

that

the

volumeof therightchannel

higher.TurntheBALAIICE

control to the left and adiust.

Conversely,if the sound

appears

to be louder on the left, it meansthat the

volume

of the left channelishigher.

Therefore,

turn the

BALANCE control to the right

andadiust.After adjust-

ing,returntheMODE

switchto STEREO.

POWER

METERS

Thesepower meters

allow you to read

out the rated

powerlevelwhen speakers

with a nominalimpedanceof

8 ohmsareconnectedto the receiver'sspeakerterminals.

NOTE:

These ualuesare related to the impedanceof the

speahersand they wry accprding to the frequency.

In order to find out the exactoutput leuel,connectan

8-ohmdummy loadinsteadof thespeahers.

FUNCTION

INDICATOR

MEMORYMARKERS

These

arevery

convenientfor frequenttuning

in to the

same

broadcastingstation.

MUTINGSWITCH

Set this switch to the -20d8 position

to attenuatethe

audiooutputindicated

by the

VOLUME

controlby 20d8.

There is no needto adiust

the VOLUMEcontrolif you

usethis switch when turningdown the audiooutput

temporarily and when changing

over records

or tapes.

VOLUME

CONTROL

Usethiscontrolto adlusttheoutputlevelto thespeakers

andheadphones.Turn it clockwiseto increasetheoutput

level.No sound

will beheardif you set

it to-. The

scale

is graduated

in dB which indicate

the attenuation

when

themaximum

outputlevel

is0dB.

III

Irt

Iti

l,l

_rEeLE_

tw ,oi! ---- +" -..,E;l'"ia'- o^.',r E

r:f

o osss$":f^fl#"

OErEn

_TONE

SWITCH

Set this switchto ON when adjusting

the BASS

and

TREBLE controls.

In the OFF position,

it causes

the

amplifierto operate

withaflat frequency

response.

FUNCTION

BUTTONS

Press

the functionbutton whichcorresponds

to the pro-

gram source.

Turn the VOLUME control down first

before selectinga different function button while the

soundfrom one

program

sourceis

beingreproduced.

FM. . . . . Press

this

buttonfor FMbroadcasts.

The FM STEREO

indicator

tights

when

the

receiveris

tunedin

toanFM

stereo

broadcast.

The soundis auto-

matically received monophonically

during

monophonic

broadcasts.

TWIN

BASS

AND

Use these

controlsTREBLE

CONTR

to adjust the bass

and the treble.

TAPE

DUPLICATE

SWITCH

Setthisswitch

to ON when

youwant

to duplicate

oredit

a pre-recorded

tape using two tape decks.

TAPE

MONTTOR

SWTTCHES

(1,2)

SetswitchI to ON with a tape

deck

which isconnected

to theTAPE 1 jacks

(REC

andPLAY)when

youwanr

monitor

theplayback

or recording

of atape.

Thetape

a deck

whichisconnected

to theTApE 2 jacks

(REC

and

PLAY) can

besimilarly

monitored

by setting

switch

2to

oN.

NOTE:

Set theseswitches to the upper (offl position when

Iistening

to records

or a broadcast.

AM..

AUX..

PHONO

2IMIC

. .

Press

this button for AM broadcasts.

Press

this

buttonwhenlistening

to an

audio component cornected to the

AUXinput

jacks.

Press

this button when playing a

record

on the turntable

connected

the PHONO

2 iacks,

or when

using

microphone

which you have

plugged

intothe

MIC

iack.

Press

this button when playinga

record

on the turntable

connected

thePHONO

i jacks.

PHONO

... ..

NOTES:

1. Unplug the microphone from the MIC jach when you

do not intend to use the microphone otherwise you

will not beable to use

thePHONO 2 jachs.

2. Only one function button should be pressed at a

time.

Plug

your

microphone

into

this

lack.

The microphone

signals

arereproduced

in monothrough

the

leftand

right

speakers.

ti Ir'

Itl

ttl

t'l

EEE! ffi g@@t@ trED

----

TUNING

METER

Whentuning

in to an FM station,

theoptimumreception

position

is indicated

whenthe metei'

pointer

deflects

deadcenter.

Checkthat theSIGNAL

meter

pointer

has

deflected

asfarto theright

possible.

SIGNALMETER

When

tuningin to an AM or FM station,

theoptimum

reception

position

is indicated

by the maximum

deflec.

tionof the

meter

pointer

to theright.

MULTIPATH

BUTTON

Usethis

switchto detectmultipath

soundwhen

installing

the FM antenna

ina position

which

yields

theminimum

multipath interference.

STEREOINDICATOR

FILTER

15Hz BUTTONS

. When

thisbuttonispressed,

a 12dB/oct

atten-

uation can be provided

for frequencies

below

l5Hz. Thismeans

that

youcancancel

out noise

in the ultra-lowfrequencies

whichis

generated

by low-pitched

rumblefrom a turntable

and

other forms of distortion.

Although

thisnoise

cannot

be heard,

it can

generate

intermodula-

tiondistortion.

8kHz . . Press

this button to provide

a l2dBloct atten-

uation

at frequencies

above

8kHz.

Setit to this

positionwhen you find high-frequency

noise,

such

asthat from scratched

records,unpleasant.

25ps

BUTTON

Press

this

buttonwhen

listeningto a *Dolby FM broad-

cast;

otherwisekeep

thisbuttonat thereleased

position.

sx-1 eao

PHONO1 CARTRIDGE

LOADSWITCH

Usethis knob to selectthe input capacitance

(pF) in

accordance

with the sp.ecifiedload capacitance

of the

moving

magnet

(MM)cartridgeconnected

to the

PHONO

1jacks.

TUNING

KNOB

Usethis

to tune

into broadcasting

stations.

Selectthe stationand tune for optimum reception

observing

the SIGNAL meter

for AM stations

andboth

the

SIGNAL

andTUNING

metersfor FM

stations.

MODE

SWITCH

Usethis

switchfor selectingmonoor stereo

performances.

STEREO: Setto thisposition

for normal

stereoopera-

tion.

MONO: Whenset

to thisposition,

the left andright

channel

signals

will bemixed

andreproduced

monophonically

from both speakersystems.

MUTING

BUTTON

ON (released

position)

. . . Release

this button to sup-

press

unpleasant

inter-station

noise

whentuningin to FM

stations.

OFF

(depressed

position)

. Depress

this.

button to pick

upweal(

stattons.

ill

It$ "'5"-,6t*

OFOTEn s]E@ FrcErvr Sx-1eAO

Tabla de contenidos

Otros manuales de Receptor estéreo de Pioneer

Pioneer

Pioneer AVH-A7100BT Manual de usuario

Pioneer

Pioneer VSX-1130-K Manual de usuario

Pioneer

Pioneer VSX-D2S Manual de usuario

Pioneer

Pioneer SX-1010 Manual de usuario

Pioneer

Pioneer SC-LX57 Manual de usuario

Pioneer

Pioneer DMH-ZS9350BT Manual de uso y cuidado

Pioneer

Pioneer MVH-G219BT Manual de usuario

Pioneer

Pioneer DMH-AF555BT Manual de usuario

Pioneer

Pioneer SX-205 Manual de usuario

Pioneer

Pioneer HTP-076 Manual

Pioneer

Pioneer VSX-9500S VSX-7500S Manual de usuario

Pioneer

Pioneer AVH-P6600DVD/UC Manual de usuario

Pioneer

Pioneer DMH-A5450BT Manual de usuario

Pioneer

Pioneer ELITE VSX-LX305 Manual

Pioneer

Pioneer VSX-S520 Manual de usuario

Pioneer

Pioneer VSX-95 Manual de usuario

Pioneer

Pioneer AVH-P4400BH/XUUC Manual de usuario

Pioneer

Pioneer AVH-A2250BT Manual de usuario

Pioneer

Pioneer VSX-405 Manual de usuario

Pioneer

Pioneer AVH-Z7100DAB Manual de usuario

Pioneer

Pioneer SX-525nbw Manual de usuario

Pioneer

Pioneer VSX-454 Manual de usuario

Pioneer

Pioneer VSX-D901S Manual de usuario

Pioneer

Pioneer AVH-2450BT Manual de usuario

Manuales populares de Receptor estéreo de otras marcas

Marantz

Marantz CINEMA 70S Manual de usuario

Kenwood

Kenwood KMDX92 Manual de usuario

Yamaha

Yamaha RX-830 Manual de usuario

Yamaha

Yamaha RX-750 Manual de usuario

Denon

Denon AVR-1311 Manual de usuario

Denon

Denon AVR-S760H Manual de usuario

Denon

Denon AVR-X7200W Manual de usuario

Sony

Sony XAV-1500 Manual de usuario

Radio Shack

Radio Shack DX-399 Manual de usuario

Sony

Sony STR-DE535 - Fm Stereo/fm-am Receiver Manual de usuario

Yamaha

Yamaha MusicCast TSR-5B3D Manual de usuario

Sony

Sony STR-DE335 - Fm Stereo/fm-am Receiver Manual de usuario

Sony

Sony STR-DG500 - Multi Channel Av Receiver Manual de usuario

Panasonic

Panasonic AJSD955B - DVCPRO50 STUDIO DECK Manual de usuario

Sherwood

Sherwood S-2660CP Manual técnico

Sony

Sony STR-K790 - Lifier Manual de usuario

Denon

Denon DRA-697CI Manual de usuario

SMART-AVI

SMART-AVI HDX-PRO Series Manual de usuario