Philips-MC-320-Service-Manual电路原理图.pdf
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1、GBCLASS 1LASER PRODUCTServiceServiceServiceMC-320TABLE OF CONTENTSPageLocation of PCBs Rs=600Tuner in : FM67.5kHz, AM80%ModulationCD in : -6dB trackTape in : 250nWb/mOutput sensitivityHeadphone output at 32 : 15mW 1dBCASSETTE RECORDER:Number of track : 2 Tracks (Stereo)Tape speed : 4.76 cm/sec 2%Wow
2、 and flutter : 48dBADistortion 250nWb/m : 70dBADistortion at 1kHz : 55dBEmphasis : 15/50 S (switchedautomatically by CD10)THD Noise(1kHz) : 70dBOutband Attenuation : 20dB for Frequency 40kHzLF Generator e.g. PM5110RecorderUse Universal Test Cassette CrO2 SBC419 4822 397 30069LEVEL METERe.g. Sennheis
3、er UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRDUTor Universal Test Cassette Fe SBC420 4822 397 30071LEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRDUTCDUse Audio Signal Disc(replaces test disc 3)SBC429 4822 397 30
4、184Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTS/N and distortion metere.g. Sound Technology ST1700BFrame aeriale.g. 7122 707 89001Tuner AM (MW,LW)To avoid atmospheric interference all AM-measurements have to be carried out in a Faradays cage.Use a bandpass filter (or at least a
5、high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BUse a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance f
6、rom the pilottone (19kHz, 38kHz).Ri=50Tuner FMMEASUREMENT SETUP1-41-5SERVICE AIDSService Tools:Universal Torx driver holder . 4822 395 91019Torx bit T10 150mm . 4822 395 50456Torx driver set T6 - T20 . 4822 395 50145Torx driver T10 extended . 4822 395 50423Cassette:SBC419 Test cassette CrO2 . 4822 3
7、97 30069SBC420 Test cassette Fe . 4822 397 30071MTT150 Dolby level 200nWb/M . 4822 397 30271Compact Disc:SBC426/426A Test disc 5 + 5A . 4822 397 30096SBC442 Audio Burn-in Test disc 1kHz . 4822 397 30155SBC429 Audio Signals disc . 4822 397 30184Dolby Pro-logic Test Disc . 4822 395 10216ESD Equipment:
8、Anti-static table mat - large 1200x650x1.25mm . 4822 466 10953Anti-static table mat - small 600x650x1.25mm . 4822 466 10958Anti-static wristband . 4822 395 10223Connector box (1M) . 4822 320 11307Extension cable(to connect wristband to conn. box) . 4822 320 11305Connecting cable(to connect table mat
9、 to conn. box) . 4822 320 11306Earth cable (to connect product to mat or box) . 4822 320 11308Complete kit ESD3(combining all above products) . 4822 320 10671Wristband tester . 4822 344 13999HANDLING CHIP COMPONENTS1-6GB WARNINGAll ICs and many other semi-conductors aresusceptible to electrostatic d
10、ischarges (ESD).Careless handling during repair can reduce lifedrastically.When repairing, make sure that you areconnected with the same potential as the massof the set via a wrist wrap with resistance.Keep components and tools also at thispotential.FATTENTIONTous les IC et beaucoup dautressemi-cond
11、ucteurs sont sensibles auxdcharges statiques (ESD).Leur longvit pourrait tre considrablementcourte par le fait quaucune prcaution nestprise leur manipulation.Lors de rparations, sassurer de bien tre reliau mme potentiel que la masse de lappareil etenfiler le bracelet serti dune rsistance descurit.Ve
12、iller ce que les composants ainsi que lesoutils que lon utilise soient galement cepotentiel.ESDD WARNUNGAlle ICs und viele andere Halbleiter sindempfindlich gegenber elektrostatischenEntladungen (ESD).Unsorgfltige Behandlung im Reparaturfall kandie Lebensdauer drastisch reduzieren.Veranlassen Sie, d
13、ass Sie im Reparaturfall berein Pulsarmband mit Widerstand verbundensind mit dem gleichen Potential wie die Massedes Gertes.Bauteile und Hilfsmittel auch auf dieses gleichePotential halten.NL WAARSCHUWINGAlle ICs en vele andere halfgeleiders zijngevoelig voor electrostatische ontladingen(ESD).Onzorg
14、vuldig behandelen tijdens reparatie kande levensduur drastisch doen verminderen.Zorg ervoor dat u tijdens reparatie via eenpolsband met weerstand verbonden bent methetzelfde potentiaal als de massa van hetapparaat.Houd componenten en hulpmiddelen ook opditzelfde potentiaal.I AVVERTIMENTOTutti IC e p
15、arecchi semi-conduttori sonosensibili alle scariche statiche (ESD).La loro longevit potrebbe essere fortementeridatta in caso di non osservazione della pigrande cauzione alla loro manipolazione.Durante le riparazioni occorre quindi esserecollegato allo stesso potenziale che quello dellamassa dellapp
16、arecchio tramite un braccialettoa resistenza.Assicurarsi che i componenti e anche gli utensilicon quali si lavora siano anche a questopotenziale.“Pour votre scurit, ces documentsdoivent tre utiliss par des spcia-listes agrs, seuls habilits rparervotre appareil en panne”.GBSafety regulations require
17、that the set be restored to its originalcondition and that parts which are identical with those specified,be used.NLVeiligheidsbepalingen vereisen, dat het apparaat bij reparatie inzijn oorspronkelijke toestand wordt teruggebracht en dat onderdelen,identiek aan de gespecificeerde, worden toegepast.F
18、Les normes de scurit exigent que lappareil soit remis ltatdorigine et que soient utiliss les pices de rechange identiques celles spcifies.DBei jeder Reparatur sind die geltenden Sicherheitsvorschriften zubeachten. Der Original zustand des Gerts darf nicht verndert werden;fr Reparaturen sind Original
19、-Ersatzteile zu verwenden.ILe norme di sicurezza esigono che lapparecchio venga rimessonelle condizioni originali e che siano utilizzati i pezzi di ricambioidentici a quelli specificati.“After servicing and before returning set to customer perform aleakage current measurement test from all exposed m
20、etal parts toearth ground to assure no shock hazard exist. The leakage currentmust not exceed 0.5mA.“CLASS 1LASER PRODUCT3122 110 03420GB Warning !Invisible laser radiation when open.Avoid direct exposure to beam.S Varning !Osynlig laserstrlning nr apparaten r ppnad och sprrenr urkopplad. Betrakta e
21、j strlen.SF Varoitus !Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiinankymttmlle laseristeilylle. l katso steeseen!DK Advarse !Usynlig laserstrling ved bning nr sikkerhedsafbrydere erude af funktion. Undg udsaettelse for strling.PREPARATIONS AND CONTROLS1-7PreparationsRear connectio
22、ns The type plate is located at the rear of the system.APowerBefore connecting the ACpower cord to thewall outlet, ensure that all other connections havebeen made.WARNING! For optimal performance, use only theoriginal power cable.Never makeor change any connectionswith the power switched on.Toavoid
23、overheating of the system, asafetycircuit has been built in.Therefore,yoursystem may switch to Standby modeautomatically under extreme conditions. Ifthis happens,let the system cool downbefore reusing it (not available for all versions).BAntennas Connection Connect the supplied AM loop antenna and F
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