Pioneer SX-202 Bedienungsanleitung

(v)

rrtoNeerl

ORDER

NO.

ARP-230-O

sx-?;0e-

MODEL

SX.2O2

(SX.2O2LI

COMES

IN SIXVERSIONS

DISTINGUISI.IED

AS FOLLOWS:

additional

service

manual.

o Cemanueld'instruction

serefdre

aumode

der6glage,

enfrangais.

. Este

manualdeservicio

tratadelm6tododeaiusteescritoenespaiiol.

CONTENTS

't. sPEctFtcATtoNs

....

2. FRONT

PANEL

FACILITIES

3. PABTS

LOCATTON

. . . . . . .

4. BLOCKDIAGRAM

5. CIRCUIT

DESCRIPTIONS

6. PACKING

7. EXPLODED

VIEW

AND

PARTS

LIST

...

8. P.C.

BOARDS

CONNECTIONDIAGRAM

9. SCHEMATICDIAGRAM

10. ELECTRICALPARTS

LIST

I1. DIAL

CORD

STRINGING

12. ADJUSTMENTS

,. ,.

REGLAGE

AJUSTE.

FICINEEFI ELECTFICINIC GCIFIPCIFIATION a I, Mesuno 1 Ljhome, Mesu.o-ku, Tokyo 1::3, Jspen

PICINEEFI ELEC:THONICB IUBAI lNC. 1925 E. oomnguez SE., Long Beach, Cahfo.nra go8lO u.S.A..

PIGINEEFI ELEC?FIC,NlC [EUnclPEI N.V. Keerbenglssn 1, 2740 Beve.en, Eletg,um

PICI|YEEFI ELECTFIEINICB AUBTFIALIA PTY. LTE!. 178-1821 tsounde.v Fosd, Bnaesde, Vrcco. a 3195. a.usc.atr€

YX O DEC.

1982 Printed

in laDan

AM/FM STEREO

RECETVER

Modol Volteg€ R6mrrks

SX-202/KU AC12OVonly U.S.A.model

sx-202/Kc AC120V

only Canadamodel

sx-202/s AC11OV

,12OV,22OV

and240V

{switchable} General export model

sx-202lYP AC240V

only Australia

model

SX-202L/HE AC22OV only European

continentmodel with AM,LW bandruner

sx-202LlHEZ AC220Vonly West Germany model with AM-LW band tuner

o This service

manualisapplicableto the KU types.For servicing

of tlte othertypes,

please

referto the

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1.SPECIFICATIONS

Amplifier Section

Continuous

Average

Power0utput

watts*

per

channel,

min.,

ohms

from

40Hertz

to 20,000Hertz

with

nomore

than

0.3%o

tolalharmonic

distortion.

TotalHarmonicDistortion

(40

Hertz

to 20,000

Hertz,

8ohms,

fromTAPE)

continuous

rated

power

output Nomorethan0.3%

12.5watts

per

channel

power

output

Nomorethan0.15%

NomorethanO.2o/"

Intermodulation

Distortion

(50

Hertz:7,000

Hertz

4: 1,

8 ohms,

fror;'rAUX)

continuous

rated

power

output Nomorethan0.3%

Damping

Factor

kHz,8

ohms) 22

Input

(Sensitivity/l

mpedance)

PHONO .....2.5mV/5Okilohms

TAPEPLAY ' 150

mV/50kilohms

PhonoOverload

Level

(T.H.D.0.1%,

1,000H2)

PHONO . . 150mV

Output Level

TAPE REC . 150

SPEAKER .... A,

B,AseriesB.off

FrequencyResponse

PHONO

(RIAA

Equalization)

. 30Hz

to 20,000H2t0'5dB

TAPEPLAY .... l5Hzto50,000Hz+ldB

Tone

Control

BASS

. r9dB (100H2)

TREBLE ... rgdB(10kHz)

Loudnessfrntour (Volum

control

setat-40d8 position)

. . +8dB

(100H2),

+6dB

(10,000H2)

Humand

Noise

(lHF,

shortcircuited,

A network)

PHONOMM.. .....71d8

TAPE

PLAY ...97d8

FM Tuner Section

*UsableSensitivity ...10.7dBf (0.9pV)

50dB

OuietingSensitivity

**MONO ....15.3d8f

(1.6pV)

STEREO .37.6d8f

(21pYl

Signal-to-Noise

Ratio

MONO ....75d8(at85dBf)

STEREO 70dB

(at

85dBf)

Distortion

(at

65dBf)

MONO 1kHz. 'O'3Yo

STEREO

lkHz. .'0.67o

1watt per

channel

power

output

CaptureRatio

. ..2.ft8

AlternateChannel

Selectivity

(400kHz) .50dB

StereoSeparation

(lkHz) .35dB

FrequencyResponse . . 30Hzto 15kHz,1! [ oa

SpuriousResponseRatio. ......70d8

lmageResponseRatio ...45d8

lF ResponseRatio. ....100d8

AM SuppressionRatio ...45d8

SubcarrierProductRatio. ......31d8

MutingThreshold .27dBt

(6.3PV)

Antenna

lnput 300

ohmsbalanced,

ohms

unbalanced

AM Tuner

Section

Sensitivity

lHF,Loop

antenna 32OtN

lHF,Ext,antenna 30pV

Selectivity .....25dB

Signal-to-NoiseRatio ....43d8

lmageResponseRatio ....40d8

lF ResponseRatio. ...'45dB

Antenna AM LooP

Antenna

Miscellaneous

PowerRequirements . ,

AC120V,

60Hz

Power

Consumption

. . . 125

Watts(UL),

150VA(CSA)

Dimensions . . . . 420(W)x98(Hl

x214(D)mm

16-9/16(W)

X 3-718(H)

X 8-7116(D)

Weight

(without

package) . . . 4.3kg(9lb 8oz)

Furnished

Parts

FMT-typeAntenna .....1

AM LoopAntenna 1

Operating

Instructions 1

*Measured pursuant to the Federal Trade Commission's Trade

Regulationrule on Povnr Output Claims

for Amplifier.

*'FM muting functions with this unit whenthe signals

are weak.

The unit's internal wiresare therefore treated sothat the signals

aranot muted when the sensitiviry ismeasured.

NOTE:

Specificationsand designsubiect

to possible

modification without

notice,

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FRONT

PANEL

FACILITIES

O PowER

swtrcH

Push

this to s1^ritchon andoff the unit's power.

Power

suppliedat the depresed

( - ) switch

position

(ON)

and

turned

off atthe

released

(I) position

(OFF).

@ HEADPHoNE

JAcK

Connectthe plug on the stereoheadphones

to thisjack

whenlistening

to soundthroughheadphones.

@ ToNE

coNTRoLs

BASS : The

bassisincreased

when

this

control

isrotated

clockwisefrom the center

position

andreduced

whenrotated

counterclockwise.

TREBLE :

The treble is increasedwhen this control is

rotatd clockwise

from the center

position

and

reduced

whenrotated

counterclockwise.

@ BALANcEcoNTRoL

This is normally kept at its centerposition. lt is rotated

whenthe volume

of sounddelivered

through

the left and

right

channels

of thespeakers

or headphones

differs.

The right channelvolumeis reduced

when the control is

rotatd toward the LEFT from the centerpositionwhile

the left channelvolume is reduced

when it is rotated

toward

theRIGHT.

O FuNcrtoN

swtrcHEs

PHONO : Press

whenlistening

to records.

FM :Press

whenlistening

to FM broadcasts.

AM :Press

whenlistening

to AM broadcasts.

@ TAPE

(ADPT)

SWITcH

This isdepresed

whenusing

a tape

deckor adaptorunit

connected

to therear

panel

TAPE/ADAPTOR

jacks.

@ LOUDNESS

SWITcH

Depress

this switchto the ON position

when listening

soundat a low levelof volume.

Thiswill enhancethe bass

and treble and givemore life to the soundevenat a low

volume.

@ voLUME

coNTRoL

Use this to adjustthe volume of the sounddelivered

through

the

speakers

orheadphones.

The volume is increased

when this control is rotated

clockwise

from

theminimum

"0" position.

@ TUNING

INDIcAToR

(TUNING)

Thislights

upto indicate

that anFM,AM stationhas

been

tuned

in.

@ srEREotNDtcAToR

(srEREo)

This lights

up automatically

when an FM stationbroad-

castingin stereohas

been

tunedin.

@ SPEAKERS

swrrcHEs

These

are used

to selectthe speakers

throughwhich you

willlisten

tothe

sound.

Theselected

speakersarenowworking.

A: The sound is heardfrom the speakers

connected

thespeaker

A terminals

ontherear

panel.

B: The sound is heardfrom the speakers

connected

the

speaker

Bterminalson

therear

panel.

No sound

will be

heard

when

SPEAKERS

A and

Bswitches

areboth released.

This isthe position

atwhich

thesound

canbeheard

throughthe headphones.

NOTE:

No sund will be heard through the geakers when both the A

and B switches are depressed if only one et of speakerc has

been

connected to either the A or B SPEAKERS terminals.

@ FREoUENcY

scALE

This indicates

the frequency

of the broadcasting

station

(FM,

AM).

Thetop levelfigures

(88

- 108)indicate

theFMband.

Thebottom level

figures

(55

- 1601indicate

the

AM band.

@ TUNTNG

KNoB

Rotate

this

knobto pick

stations

(FM,

AM).

@ PowER

tNDtcAToR/DtAL

potNTER

r6"

L;N

t';K

t;K -IFUNCTION

l-*'-'

LFI-EI-E

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3.PARTS LOCATION

FrontPanel

View

Speaker knob

AAD608

Front oanelassemblv

ANM-292

AAD€O5

Phone

jack

AKN{45

NOruSr

. Parts uithout part number connot be supplied.

o ?he I morh found on some component ports indicotes the impottonce of the

sofety foctor of the port- Therefore, uhen replacing, be sure to use

parts of identicol

desEnation.

. For your Ports Stoch Control, the fost mouing items dre indicdted uith the morhs

t* ond *.

,* CENERALLY MOWS FASTER THAN '.

This classificotion shall be odjusted by each distributor becduseit depende on model

number, temperoture, humidity, etc.

Bonnet

ANE4I O

Tuning knob

AAA{84

Knob B

(BASS,

TREBLE,

BALANCE}

AAB-317

RearPanelView

Earth

terminal

Complexterminal

AKX-073

TopView

A ** Fuse

(T1.6A)

AEK-121

A * Power

transformer

1120v)

ATT.942

e-- KnobAlvoLuME)

AAB.3'I6

Function knob A

{TAPE, LOUDNESS)

AAD6O6

Function knob B

{PHONO,

FM,

AM)

AAD€O7

AC socket

AKP-O39

Rear

panel

ADG-073

Switchassembly

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BLOCK

DIAGRAM

FRONT

END (1/3)

| 3OOO

FM BAL

| 75o

L-UNBAL

l- GND

I LooP

L ANT

l- ernv

Lch REC

i-rroro

l-enor.ro

Rch REC

L PLAY

STEREO

LED DRIVER FM MUTE

FM IF AMP

+82

(

13.4V

AM FRONT

END

trsomvl ^:

EqUALIZERAMP

sr-4

TAPE

(t/21

sr-5

LOUDNESS

+q2 -(v4l

lz.smvl

a5[, lt5omvl. _

fT",

(3l4.,4/41

(2/21

ON - OFF

TONECONTROL

vR2-2,2-3

s2-2

SP.B

(t/2't

lr4.

I PHONES

Rch

PEAKERS

srol 1,,

1,,

;o\--<r5

acr2ov | \,,

6OHz I o{ll

qail

I r"

Sl-l: FUNCTION

(PHONO)

SI.2: FUNCTION

(FM)

sr-3: FUt{cTroN

(aM}

SI.4 : TAPE

MONITOR

SI-5 : LOUDNESS

ON - OFF

- OFF

ON - OFF

- OFF S2-I : SPEAKERS

S2-2: SPEAKERSA

au9 L

sr-s LJ

(4/41

IFIDET MPX

rdLF TOR

SMETER

DETECTOR

vco

DET.

OUT- p 691

SlG. L OUT

D6 TUNING --* ar,I

':*" I

1,"=rd;Tt--17 G:405dB

POWER

AMP

sr-4 sr-5

(

2/2't (

2/2

+82 AM

POWER

ON/OFF MUTING

POWERSUPPLY 8 PROTECTOR

SIOI : POWER ON - OFF

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CIRCUIT

DESCRIPTIONS

FM FrontEnd

A unitized variable capacitor type front end

unit is used consisting of an FET RF singlestage

amp, Iocal oscillator/mixer IC and €rnIF trans-

former.

FM lF Amp, Detector

andMPX Circuit

A 2-transistor IF amp with ceramic filter is used

and the next stage

hasan IC (M51533L) contain-

ing the FM IF detector and MPX circuit. The block

diagramof IC M51533L is shown in Fig. 5-1.This

IC uses a peak detection method which can be

adjusted with a single coil. The PLL method is

employed to reconstitute the 38kHz sub-carrier

for the MPX circuit.

The IF signalis input at pin 1 and the detection

output is obtained from pin 5. The detection out-

put passes

through the muting Q4, goesto pin 9,

passesthrough the MPX circuit and the stereo

signals are obtained from pins 11 and L2. In

addition, this unit detects the presence

or absence

TL OUT ROUT

of a pilot signal to automatically switch between

stereo and mono reception by R14 which is con-

nected to pin 14. When a stereo signal is received,

pin 13 drops to the low level to light the stereo

indicator. When pin 2 is grounded, the PLL VCO

andFM IF operationstop (for AM).

FM Muting

andLED Driver

With this unit, muting is automatically activated

when the antenna input drops below 10pV. As the

antenna input decreases,the voltage at pin 3

drops, Q5 is turned off and Q6 is turned on. As a

result, the gate voltage of Q4 drops, Q4 is turned

off and the detector output circuit is blocked

(Fig. 5-1). When an FM or AM station is tuned

in, the base

potential of Qb is raised,Q5 is turned

on and the tuning indicator lights.

M5r

533L

REGULATOR

LEVEL

METER

CIRCUIT

INPUT

BUFFER

TER

ITC

t-3

Fig.

5-1 FM lF, DetectorandMPXcircuit

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AM Tuner

This uses a variable capacitor type tuning

circuit composed of three transistors, a 2-tran-

sistor front end and a single transistor AM IF

detector.

AF Section

The equalizer circuit has a low-noise operation

amp(2 channel)

M5218P.

The power amp hasa 25 watt output power IC

STK4141-2S

(See

Fig.5-a).

The tone control circuit isplacedin the negative

feedbackloop of the power amp.

Protective

Circuits

This unit has a circuit to detect DC voltagesat

the power amp outputs and a muting circuit that

operates

when power is turned on and off.

Fig. 5-2 shows the construction of the DC

voltage protection circuit. When a DC voltage

appears at the power amp output, either Q13

(plus) or Q14 (minus) is activated depending on

the polarity of the DC voltage and a trigger is

applied to D15. This turns on Dl5, +B1 isshorted,

the fuse on the primary side is cut and the power

supply circuit is shut off.

Fig. 5-3 shows the power on/off muting circuit.

Time constant t1 is longer than t2 so that imme-

diately after the power is turned on, the emitter

potential of Q15 exceeds

its base

potential, QL5 is

turned on to activate Q16 and Q17 and ground the

signal. A few secondslater, the basepotential of

Q15 risesto turn off Q15 along

with Q16 andQ17.

When the power is turned off, the charge of

C161 passes

through D18; it is almost completely

discharged in an instant to make the base

potential

of Q15 zero.However,because

the chargeof C160

remains, Q15 is turned on and muting is activated

in the samemanner as when power is turned on.

SPEAKER

swrTcHEs

Fig.5-2 DC Voltage

protection

circuit

POWERAMP

( Lch

)

MAI

VOLUME

BALANCE

VOLUME

--:-----J

! Dt7 Dr6 RtSl

;-:'- - J

itz

Fig.

5-3 Power

ON/OFFmuting

circuit

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lNl(+)L

tNt

(-)

2(+)

lN2(-)

Ifi

L__t

t5 16

GND 5689rO13t44

MUTING Vee OUT

I OUT

2 Vee

Fig.

54 Equivalent

circuit

of power

Mark No. Part No.

1. AHA-335

2. ARB-525

3. AT8-076

4. ADH-Oos

5. AHE-l02

PACKING

Description

Sidepad

Operating

instructions

(English)

Loop antennaassembly

T-type antenna

Packingcase

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7.EXPLODED

VIEW

AND PARTS

LIST

NOTES;

o Partswithout part number cannot besupplied.

o The I marh found on some component parts indicates the importance of the

safety foctor of thepart. Therefore, when replacing, be sure to useparts

of identical

designation.

o For your Ports Stoch Control, the fast mouing items are indicated with the marks

t* ond i.

rT GENERALLY MOTTES

FASTER THAN *.

This classification shallbe adjusted by eachdistributor because

it dependson model

number, temperature, humidity, etc.

Description No. Part No.

No. Part No. Descriptions

Speaker

switch assembly

Switch holder

Pullyassembly

LED assembly

Earth

Mounting plate

Pullyassembly

Pully holder

Headphone

jackassembly

Chassis

Bottom Plate

Binder

Earth terminal

Rearpanel

Tuningdrum

Smoother

Pointer

holder

Pointer assembly

Heat

sink

1. ANE410

2. BBZ30P080FZK

3. ATT-942

4. PMZ30P060FMC

5. AAD€O8

6. VMZ30P060FMC

7. NKgOFUC

L AAB-317

9. NKTOFUC

10. AAA-O84

11. AAB-316

12. ANM-292

13. AAD€O7

14. AAD€06

15. ASG-541

16. AAD€Os

17. AEC-784

18. AXA-373

19. AEC471

20. MTZ3oP100FZK

21. AEK-121

22. AKP{39

23. ADG{73

24. GWM-267

25. AKN-045

26. SUJSLYXSF

27. ACG-O17

28. BBT3OPOSOFZK

Bonnet

Screw (3 x 8l

Power transformer (1

20V)

Screw (3 x 6)

Speaker knob

Screw(3x6)

Nut

Knob B (BASS,

TREBLE,

BALANCE}

Nut

Tuning knob

Knob

A (VOLUME)

Front panel

assembly

Function knob B (PHONO

FM,

AM)

Function knob A (TAPE,

LOUDNESS)

Push

switch (POWEF)

Power knob

Cabinet bumper

Tuning shaft

Nylon rivet

Screw (3 x 1O)

Fuse

(T 1.6,4)

AC socket

AC power cord

Complex assembly

Phone

Jack(PHONES)

Speakerswitch

Ceramic

{0.01)

Screw (3 x 8l

50.

51.

52.

53.

54.

55.

56.

57.

58.

59.

60.

61.

62.

63.

64.

65.

66.

67.

68.

69.

70.

A**

Wireholder

A**

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A.g

te@

,/ ,/

q---[

\--.

Sr *N

,,-g$

,\r#E

JF]

>l u I

/tri

>\-

,^-2

\rs

./2, \

Z'7

22"

|727^)<

z'

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