Aiwa-NSXF959-cs-sm 电路图 维修手册.pdf
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1、anua CDSTEREOSYSTEM awa SERVICE NSX-A959 NSX-F959 SYSTEM CD-CASSEIVER SPEAKER NSX-A959 (TYPE: U) CX-NA959 SX-WNA958 NSX-F959 (TYPE: LH) CX-NF959 SX-WNF959 GIfrequiringinformationabouttheCDmechanism,seeServiceManualof6ZG-1, S/MCodeNo.09-984-249-90T. RadioFans.CN 收音机爱 好者资料库 TABLEOFCONTENTS PROTECTIONO
2、FEYESFROMLASERBEAMDURINGSERVICING.3 PRECAUTIONTOREPLACEOPTICALBLOCK.3 SPECIFICATIONS.4 NOTEONBEFORESTARTINGREPAIR. 5 ELECTRICALMAINPARTSLIST. 7 TRANSISTORILLUSTRATION. 12 BLOCKDIAGRAM-1(MAIN/FRONT). 13 WIRING-1(MAIN: U. LH) .15 SCHEMATICDIAGRAM-1(MAIN:U) . 17 SCHEMATICDIAGRAM-2(MAIN: LH). 20 SCHEMAT
3、ICDIAGRAM3(TUNER).s.s. 23 IC BLOCKDIAGRAM-1.25 SCHEMATICDIAGRAM4(FRONT). 26 WIRING-2(FRONT).29 SCHEMATICDIAGRAM-5(HIFI-AMP). 31 WIRING-3(HIFI-AMP).s.33 WIRING4(JOG/RELAY/KEY). 35 SCHEMATICDIAGRAM-6(RELAY).n. 37 WIRING-5(DECK).38 WIRING-6(AC/PT).39 ADJUSTMENT1. 40 PRACTICALSERVICEFIGURE.s. 42 ICDESCR
4、IPTION.43 FLGRIDASSIGNMENT6 ohms) LH:170W+170W(75tiz,T.H.D. 10%,6 ohms) 0.3%(13.5W,75Hz,6 ohms,DIN AUDIO) VI DEO/AUX:210mV(adjustable) MD:21OmV(adjustable) MlCl,MIC2: 1.4mV(10kohrms) LINEOUT:200mV SPEAKERS:acceptspeakersof 6 ohmsormore SURROUNDSPEAKERS: acceptspeakersof8 ohmsto16ohms PHONES(stereoja
5、ck): accepts headphonesof32ohmsormore 4 tracks,2 channelsstereo CrO,tape:50Hz-16000Hz Normaltape:50Hz15000Hz 60dB(DoblyB NRON,CrOztape peaklevel) ACbias Deck1:playbackheadx 1 Deck2:Recording/Playbackheadx1/ eraseheadx 1 LaserSemiconductorlaser(1 =780nm) D-Aconverter1 bitdual Signal-to-noiseratio83dB
6、(1kHz,O dB) Harmonicdistortion0.05%(1kHz,O dB) WowandflutterUnmeasurable Cabinettype 4 way(magneticshieldedtype) Speakers Subwoofer: 200mmconetype Woofer: 120mmconetype Tweeter: 60mmceramictype Supertweeter 20mmceramictype Impedance6 ohms Outputsoundpressurelevel87dBAM/m Dimensions(Wx H x D) 260 x 3
7、53x387mm (10/,X14X15/,ln.) Weight6.5kg(14Ibs5OZ.) Cabinettype 4 way(magneticshieldadtype) Speakers Subwoofer: 200mmconetype Woofer: 120mmconetype Tweeter: 60mmceramictype Supertweeter: 20mmceramictype Impedance6 ohms Outputsoundpressurelevel87dBIW/m Dimensions(Wx H x D)270 x 440 x316mm Weight6.8kg c
8、General PowerrequirementsU:120VAC,60HZ LH:120V1220-230V1240V AC (switchable),50/60Hz PowerconsumptionU:195W LH:250W Dimensionsofmainunit300 x 357.5x376mm (1 17/8X14/,X147/,in.) Weight 12.8kg(28Ibs4 OZ.) GDesignandspecificationsaresubjecttochangewithout notice. c Theword“BBEandthe“BBEsymbol”aretradem
9、arksofBBE Sound,Inc. UnderlicensefromBBESound,lnc. GDolbynoisereductionmanufacturedunderlicensefromDolby LaboratoriesLicensingCorporation. “DOLBY”andthedouble-DsymbolnoaretrademarksofDolby LaboratoriesLicensingCorporation. 4 NOTEONBEFORESTARTINGREPAIR 1.Forceddischargeofelectrolyticcapacitorofpowers
10、upplyblock Whenrepairisgoingtobeattemptedinthesetthatusesrelaycircuitinthepowersupplyblock,electricpotentialiskeptcharged acrosstheelectrolyticcapacitors(C 101,102)eventhoughACpowercordis removed.Ifrepairisattemptedinthiscondition,the secondarydefectcanoccur. Inordertopreventthesecondarytrouble,perf
11、ormthefollowingmeasuresbeforestartingrepairwork. Discharctetxocedure,!1 “! RemovetheACpowercord, Connecta dischargingresistoratanendofleadwirethat hasclipsat bothends.Connectortheotherendofthe leadwiretometalchassis. Contacttheotherendofthedischargingresistortothe positive(+)side(+VH)ofCIO1.(Fortwos
12、econds) Contactthesameendofthedischargingresistoras step tothenegative(-)side(-VH)ofC102inthesame way.(Fortwoseconds) CheckthatvoltageacrossC 101andC 102hasdecreased 1 Vorlessusinga multimeteroranoscilloscope. L Selecta dischargingresistorreferringtothefollowingtable. Fig-1 Chargingvoltage(V) Discha
13、rging (Clol,102) Ratedpower(W)Partsnumber resistor(Q) 25-48100387-AOO-247-090 49-1402205 87-AOO-232-090 Note:Thereferencenumbers(C101,C102)oftheelectrolyticcapacitorscanchangedependingonthemodels.Besuretocheckthe referencenumbersofthechargingcapacitoronschematicdiagrambeforestartingthedischargingwor
14、k. 2.CheckitemsbeforeexchangingtheMICROCOMPUTER BesuretocheckthefollowingitemsbeforeexchangingtheMICROCOMPUTER.ExchangetheMICROCOMPUTERafter confirmingthattheMICROCOMPUTERissurelydefective. 2-1.RegardingtheHOLDterminaloftheMICROCOMPUTER WhentheHOLDterminal(INPUT)oftheMICROCOMPUTERis“H,theMICROCOMPUT
15、ERis judgedtobeoperating correctly.Whenthisterminalis“L”,themainpowercannotbeturnedon.Therefore,besuretochecktheterminalvoltageof theHOLDterminalbeforeexchange. WhentheMICROCOMPUTERisnotdefective,theHOLDterminalcanalsogo“L”whenthePOWERAMPLIFIERhasany abnormalitiesthattriggerstheabnormalitydetectionc
16、ircuitontheMAINC.B.thatsetstheHOLDterminalto“L”. GGoodornogoodjudgmentoftheMICROCOMPUTER TurnontheACmainpower. ConfirmthatthemainpoweristurnedonandtheHOLDterminaloftheMICROCOMPUTERkeepsthe“Hlevelor not. WhentheHOLDterminalis“L”level,theabnormalitydetectioncircuitis judgedtobeworkingcorrectlyandthe M
17、ICROCOMPUTERis judgedtobegood. .- r . .-.- FRONTC.B; MAINC.B 1: h Ik HOLD T IIV1lVI t II Insomemodels,itis PIN. 5 - OVERLOADDET POWERAMP -i -$3 DCDETPOWERAMP :. ACDET POWERSUPPL II 7L- dependmguponuncroprocessor. .- .- . Fig-2-l 5 Insucha case,checkalsoifthePOWERAMPLIFIERcircuitorpowersupplycircuith
18、asanyabnormalitiesornot. 2-2.Regardingreset TherearecasesthatthemachinedoesnotworkcorrectlybecausetheMICROCOMPUTERisnotreseteventhoughtheAC powercordis re-inserted,orthesoftwarereset(pressingtheSTOPkey+ POWERkey)isperformed. Whentheabovedescribedphenomenonoccurs,itcanleadstowrongjudgmentas iftheMICR
19、OCOMPUTERisdefectiveandto exchangetheMICROCOMPUTER.Insucha case,performtheforced-resetbythefollowingprocedureandcheckgoodorno goodoftheMICROCOMPUTER. RemovetheACpowercord. Fig-2-2 ShortthebothendsoftheelectrolyticcapacitorC 113thatisconnectedtoVDDoftheMICROCOMPUTERwithtweezers. ConnecttheACpowercord
20、again.IftheMICROCOMPUTERreturnstothenormaloperation,theMICROCOMPUTER isgood. Note:ThereferencenumberorMICROCOMPUTERpinnumberoftransistor(QI10)andelectrolyticcapacitor(Cl13)canchange dependingonthemodels.Besuretocheckthereferencenumbersonschematicdiagrambeforestartingthedischargingwork. 2-3.Confirmat
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