Technics SA-DX950 Manuale utente

OrderNo. MD0102029C1

AVControl StereoReceiver

SA-DX950

Color

(K)... Black Type

P... U.S.A.

PC... Canada

SPECIFICATIONS

FMTunerSection

Frequencyrange 87.9-107.9MHz

Sensitivity 11.2dBf(2V, IHF’58)

50 dBquieting sensitivity

MONO 18.3dBf(4.5V, IHF’58)

STEREO 38.3dBf(45 V, IHF’58)

Total harmonicdistortion

MONO 0.2%

STEREO 0.3%

S/N

MONO 73 dB

STEREO 67 dB

Frequencyresponse 20 Hz-15 kHz, +1 dB, -2dB

Alternatechannel selectivity 65 dB

Captureratio 1.5dB

Imagerejection at98 MHz 40 dB

Spuriousresponse rejection at98 MHz 75 dB

AMsuppression 50 dB

Stereo separation

1kHz 40 dB

10 kHz 30 dB

Antennaterminal 75 (unbalanced)

AMTunerSection

Frequencyrange 530-1710 kHz

Sensitivity 20 V, 330 V/m

Selectivity 55 dB

IF rejection (at1000 kHz) 50 dB

Video Section

Outputvoltageat1Vinput

(unbalanced) 1±0.1Vp-p

Maximuminputvoltage 1.5Vp-p

Input/outputimpedance 75

AmplifierSection

Rated minimumsinewaveRMSpoweroutput

40 Hz-20 kHzboth channelsdriven

0.9%total harmonicdistortion 100 W perchannel (6 )

1kHzcontinuouspoweroutputboth channelsdriven

0.05%total harmonicdistortion 105 W perchannel (6 )

Total harmonicdistortion

rated powerat40 Hz-20 kHz 0.9%(6 )

halfpowerat1kHz 0.07%(6 )

Powerbandwidth

both channelsdriven, -3dB 10 Hz-70 kHz(6 , 0.9%)

Poweroutputat1kHzeach channel driven

0.9%total harmonicdistortion

Front 2x100 W (6 )

Center 100 W (6 )

Surround 2x100 W (6 )

Lowfrequencydamping factor 30 (6 )

Load impedance

Front

AorB 4-8

Aand B 8

Center 6-8

Surround 6-8

Dynamicheadroom 2dB(6 )

Frequencyresponse

PHONO RIAA standard curve±0.8dB

CD, TAPE, DVD, TV, VCR 10 Hz-70 kHz, ±3dB

Inputsensitivity

PHONO 0.4mV(3mV, IHF’66)

CD, TAPE, DVD, TV, VCR 27 mV(200 mV, IHF’66)

S/N(IHF A)

PHONO 70 dB

CD, TAPE, DVD, TV, VCR 78 dB

DVD6CH 100 dB(IHF A, Rated Power,

S=2 V), 85 dB(94 dB, IHF’66)

Inputimpedance

PHONO 47 k

PHONO

CD, TAPE, DVD, TV, VCR 22 k

Tonecontrols

BASS 50 Hz, +10 to -10 dB

TREBLE 20 kHz, +10 to -10 dB

Subwooferfrequencyresponse (-6dB) 7-200 Hz

Digital input

Optical 2

Coaxicial 1

General

Powersupply AC120 V, 60 Hz

Powerconsumption 410 VA320 W

Dimensions(W xHxD) 430 x158 x375 mm

(16-15/16”x6-7/32”x14-25/32”)

Mass 9.1kg (20.1lb.)

Powerconsumption in standbymode: 1 W

Notes:

1. Specificationsaresubjectto changewithout notice. / Mass and

dimensionsareapproximate.

2. Total harmonicdistortion ismeasuredbythedigital spectrum analyzer.

*Manufactured underlicense fromDolbyLaboratories. “Dolby”,

“Pro Logic”and thedouble-Dsimbol aretrademarks ofDolby

Laboratories.

** Manufactured underlicense fromDigital TheaterSystem. “DTS”

and “DTSDigital Surround”aretrademarks ofDigital Theater

Syatem.

1. SafetyPrecaution

(This“SafetyPrecaution”isappliedonlyinU.S.A.)

1. Beforeservicing, unplug thepowercordtopreventanelectric

shock.

2. Whenreplacing parts, use onlymanufacturer’srecommended

components forsafety.

3. Check thecondition ofthepowercord. Replace ifwearordamage

isevident.

4. Afterservicing, besuretorestoretheleaddress, insulation

barriers, insulation papers, shields, etc.

5. Beforereturning theservicedequipmenttothecustomer, besure

tomake thefollowing insulation resistance test topreventthe

customerfrombeing exposedtoashock hazard.

-Insulation Resistance Test

1. Unplug thepowercordand shortthetwoprongsoftheplug witha

jumperwire.

2. Turnon thepowerswitch.

3. Measuretheresistance valuewithohmmeterbetweenthejumper

ACplug and eachexposedmetal cabinet part, suchas screw

heads, antenna, control shafts, handlebrackets, etc. Equipment

withantennaterminalsshouldreadbetween3M and 5.2M toall

exposedparts*. (Fig1) Equipmentwithoutantennaterminals

shouldreadapproximatelyinfinitytoall exposedparts. (Fig2)

*Note:Someexposedparts maybeisolatedfromthechassisby

design. These will readinfinity.

4. Ifthemeasurementisoutsidethespecifiedlimits, thereisa

possibilityofashock hazard. Theequipmentshouldberepaired

and recheckedbeforeitisreturnedtothecustomer.

2. BeforeRepairand Adjustment

DisconnectACpower, dischargePowerSupplyCapacitorsC1702 through a10 , 5Wresistor

toground. DONOTSHORT-CIRCUITDIRECTLY(withascrewdriverblade, for instance), as this

may destroysolidstatedevices.

Afterrepairsarecompleted, restorepowergraduallyusing avariac, toavoidovercurrent.

Currentconsumption atAC120 V, 60 HzinNOSIGNALmodeshouldbe400~1200 mA.

3. Protection Circuitry

Theprotection circuitrymay have operatedifeitherofthefollowing conditionsarenoticed:

-Nosound isheardwhenthepoweristurnedon.

-Stopsduring aperformance.

Thefunction ofthiscircuitryistopreventcircuitrydamageif, for example, thepositive and

negative speakerconnection wires are“shorted”, or ifspeakersystemswithanimpedance less

thantheindicatedratedimpedance oftheamplifierareused.

Ifthisoccurs, followtheprocedureoutlines below:

1. Turnoff thepower.

2. Determinethecause oftheproblemand correct it.

3. Turnon thepoweronce againafteroneminute.

Note:

Whentheprotection circuitryfunctions, theunitwill notoperateunless thepowerisfirstturned

off and thenon again.

4. Accessories ACpowersupplycord... 1pc.

AMLoop AntennaSet/ ... 1set.

FMIndoor Antenna... 1pc.

RemoteControl / Transmitter... 1pc.

5. Front Panel Controls

5.1. FrontPanel

5.2. Remote Control

6. Operation Checks and MainComponent

Replacement Procedures

“ATTENTIONSERVICER”

Somechassiscomponentsmaybehave sharp edges. Becareful whendiassembling and

servicing.

1. Thissection describes procedures forchecking theoperation of

themajorprintedcircuitboardsand replacing themain

components.

2. Forreassemblyafteroperation checks orreplacement, reverse the

respectiveprocedures. / Special reassemblyprocedures are

describedonlywhenrequired.

3. Select itemsfromthefollowing index whenchecks orreplacement

arerequired.

Content

-Checking ProcedureforeachmajorP.C.B.

...................................................................................................................

P.g. 7~9

-MainComponentReplacementProcedures

1. ReplacementofthePowerICand Regulator

Transistor.............................................................................................

P.g. 10

2. Installation ofthebottomcoverafter

replacement...........................................................

............................................ P.g. 11

6.1. Checking ProcedureforeachmajorP.C.B.

Step1&2Unscrewand remove top cabinetas shown.

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