Philips-MC-77-Service-Manual电路原理图.pdf

Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Measurement setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Warnings & Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Service Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Location of printed circuit boards . . . . . . . . . . . . . . . . . . . 2-2Brief Operating InstructionsDismantling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Service Testprogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Blockdiagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Published by HB 0218 Service Audio Printed in The Netherlands Subject to modification'3103 785 25160CDR Mini SystemCLASS 1LASER PRODUCT©Copyright 2002 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrievalsystem or transmitted, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.Table of ContentsMC-77/21/21M/22/37Front Display Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Tuner Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Front Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8STANDBY (POWER) PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1KEY CONTROL (KEYB. 1) & LIGHTWASH PARTS . . . . . . . . . . . . . . . 8-2HEADPHONE, JOG (VOLUME) AND CDC KEY PARTS . . . . . . . . . . . . 8-3Electronic Tape Function ETF8 . . . . . . . . . . . . . . . . . . . . 93 Disc Tray Changer Module . . . . . . . . . . . . . . . . . . . . . 10Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Exploded view of set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Partslist of set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121-2General:Mains voltage : 120 / 240V switchable (for /21): 230V (for /22): 120V (for /37)Mains frequency : 50 60HzPower consumption : 43W at 1/8 PRATED: 185W at max output: 10W at Stand by: 1W at ECO Stand byClock accuracy : 4 seconds per dayTuner: FMTuning range : 87.5MHz - 108MHzGrid : 50 kHz, 100kHz for /37IF : 10.7MHz Aerial input : 75 coaxial: 300 click fit for /37Sensitivity Mono (26dB S/N) : 60dBImage rejection : > 25dB-3dB Limiting Point : 45dBImage rejection : > 28dBLWTuning range : 153kHz - 279kHzGrid : 3kHzIF : 450kHz ±1kHzSensitivity at 26dB S/N : 35dBImage rejection : > 30dBAmplifier:Output power : 2 x 75W at 6 (2x70W FTC)Headphone : 2,5V at 100kFrequency response : 20Hz - 20kHz (-3dB) LimitEqualizer : Digital Sound ControlInput sensitivityAux/Line : 500mV ±2dBMicrophone : 2.5mV ±2dB at 1kHzCD unit:Measured at the output of the 3DTC Module.Frequency response within : 20Hz - 20kHz at ±1dBSignal/Noise ratio : > 80dB (A-weighted)Distortion at 1kHz,0dB : 60dB at IEC IFrequency response : 80Hz - 12500Hz within 8dBSignal/Noise ratio : > 48dB (A-weighted)Distortion at 1kHz,250nW/m: 40sTechnical Specification1-3Measurement SetupBandpass250Hz-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 from the pilottone (19kHz, 38kHz).Ri=50WTuner FMBandpass250Hz-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 Faraday´s cage.RF Generator e.g. PM5326Ri=50WLRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTCDUse Audio Signal Disc SBC429 4822 397 30184(replaces test disc 3)LRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTRECORDERUse Universal Test Cassette CrO2SBC419 4822 397 30069or Universal Test Cassette Fe SBC420 4822 397 30071LF Generator e.g. PM51101-4' WARNINGAll ICs and many other semiconductors are susceptible toelectrostatic discharges (ESD). Careless handling duringrepair can reduce life drastically.When repairing, make sure that you are connected with thesame potential as the mass of the set via a wristband withresistance. Keep components and tools at this potential.f ATTENTIONTous les IC et beaucoup d´autres semi-conducteurs sontsensibles aux décharges statiques (ESD). Leur longévitepourrait être considérablement écourtée par le fait qu´aucuneprécaution nést prise à leur manipulation.Lors de réparations, s´assurer de bien être relié au mêmepotentiel que la masse de l´appareil et enfileer le braceletserti d´une résistance de sécurité.Veiller à ce que les composants ainsi que les outils que l´onutilise soient également à ce potentiel.d WARNUNGAlle ICs und viele andere Halbleiter sind empfindlichgegenüber elektrostatischen Entladungen (ESD).Unsorgfältige Behandlung im Reparaturfall kann dieLebensdauer drastisch reduzieren.Sorgen Sie dafür, daß Sie im Reparaturfall über ein Puls-armband mit Widerstand mit dem Massepotential desGerätes verbunden sind.Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesemPotential.WAARSCHUWINGAlle IC´s en vele andere halfgeleiders zijn gevoelig voorelectrostatische ontladingen (ESD).Onzorgvuldig behandelen tijdens reparatie kan de levensduurdrastisch doen vermindern. Zorg ervoor dat u tijdens reparatievia een polsband met weerstand verbonden bent met hetzelfdepotentiaal als de massa van het apparaat.Houd componenten en hulpmiddelen ook op ditzelfde potentiaal.i AVVERTIMENTOTutti IC e parecchi semi-conduttori sono sensibili alle scarichestatiche (ESD).La loro longevità potrebbe essere fortemente ridatta in caso dinon osservazione della più grande cauzione alla loromanipolazione. Durante le riparationi occorre quindi esserecollegato allo stesso potenziale che quello della massadelápparecchio tramite un braccialetto a resistenza.Assicurarsi che i componenti e anche gli utensili con quali silavora siano anche a questo potenziale.'Safety regulations require that the set be restored to itsoriginal condition and that parts which are identical withthose specified be used.Safety components are marked by the symboliLe norme di sicurezza estigono che l´apparecchio vengarimesso nelle condizioni originali e che siano utilizzati ipezzi di ricambiago identici a quelli specificati.Componenty di sicurezza sono marcati conVeiligheidsbepalingen vereisen, dat het apparaat in zijnoorspronkeliijke toestand wordt teruggebracht en datonderdelen, identiek aan de gespecificeerde, worden toegepast.De Veiligheidsonderdelen zijn aangeduid met het symbools Varning !Osynlig laserstrålning när apparaten är öppnad ochspärren är urkopplad. Betrakta ej strålen.¶ Advarsel !Usynlig laserstråling ved åbning når sikkerhedsafbrydere er ude af funktion. Undgå udsaettelse for stråling.§ Varoitus !Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiinanäkymättömälle laserisäteilylle. Älä katso säteeseen !f“Pour votre sécurite, ces documents doivent être utilisés pardes spécialistes agréés, seuls habilités à réparer votreappareil en panne“.ESDSAFETYdBei jeder Reparatur sind die geltenden Sicherheitsvor-schriften zu beachten. Der Originalzustand des Gerätesdarf nicht verändert werden. Für Reparaturen sind Original-ersatzteile zu verwenden.Sicherheitsbauteile sind durch das Symbol markiert.fLes normes de sécurité exigent que lappareil soit remisà létat dorigine et que soient utilisées les pièces derechange identiques à celles spécifiées.Les composants de sécurité sont marquésCLASS 1LASER PRODUCT' DANGER: Invisible laser radiation when open.' After servicing and before returning the set to customerperform a leakage current measurement test from all exposed metal parts to earth ground, to assure noshock hazard exists.The leakage current must not exceed 0.5mA.AVOID DIRECT EXPOSURE TO BEAM.' AVAILABLE ESD PROTECTION EQUIPMENT :anti-static table mat large 1200x650x1.25mm 4822 466 10953small 600x650x1.25mm 4822 466 10958anti-static wristband 4822 395 10223connection box (3 press stud connections, 1M) 4822 320 11307extendible cable (2m, 2M, to connect wristband to connection box) 4822 320 11305connecting cable (3m, 2M, to connect table mat to connection box) 4822 320 11306earth cable (1M, to connect any product to mat or to connection box) 4822 320 11308KIT ESD3 (combining all 6 prior products - small table mat) 4822 310 10671wristband tester 4822 344 13999Warnings & Safety2-1TORX T10 screwdriver with shaftlength 150mm .4822 395 50423TORX screwdriver set SBC 163 .4822 295 50145Audio signal disc SBC 429.4822 397 30184Playability test disc SBC444 .4822 397 30245Test disc 5 (disc without errors) +Test disc 5A (disc with dropout errors, black spots and fingerprints)SBC 426/426A .4822 397 30096Burn in test disc (65 min. 1kHz signal at -30dB level without “pause“) .4822 397 30155SBC420 Test cassette Fe.4822 397 30071SBC419 Test cassette CrO2.4822 397 30069Service hintsHandling chip componentsThe demo mode displays various features of the set and will start automatically.Press and hold DEMO STOP on the system until “DEMO OFF OFF“ is displayed. The system will switch toStandby mode.Note: Even if you remove the AC power cord and reconnect it to the wall socket, the demonstration will remain offuntil you activate it again.Escape from Demo Mode“Service Tools2-2MAINS BOARDSOCKETBOARDTUNER BOARDETF 8BOARDDISPLAY BOARDCOMBI BOARDSTANDBY(POWER)BOARDCDC KEYBOARDKEY CONTROL(KEYB.1)BOARDJOG(VOLUME)BOARDHEADPHONEBOARDLIGHTWASH BOARDCD MAIN BOARD3DTCLOADERMECHANICBOARDLocation of Printed Circuit BoardsAttention:Lightwash, CDC-key board, standby board and headphone board are part of the Front Control Board.For details see chapter 8Brief Operating Instruction2-3The following excerpt of the Owners Manual serves as a very short introduction to the set.The complete Owners Manual can be downloaded in several languages from the Internet site of Philips Customer Care Center: www.p4c.philips.comCD/CD-R/CD-RW COMPATIBLEOPENSTANDBY-ONECOPOWERiRVOLAUX/CDRPROGPRESETTAPESEARCH/TUNETUNERDEMO STOPPAUSEPREV NEXTRECSTOPPLAYBASS TREBLEPHONES1234567890!#$%NEWSDC3CHANGERCD 123CDOPENCLOSECD 1CD 2CD 3MICRO SYSTEMAUTO REVERSE CLASS D AMPLIFIER SYSTEMWOOX ADVANCED TECHNOLOGY SYSTEM2-4Controls (main systems illustration on page 3)Controls on the system andremote control1STANDBY ONyto switch the system on or to Standby mode.2ECO POWERto switch the system on or to Eco PowerStandby mode.3iRinfrared sensor for remote control.4#OPENto open the tape deck door.5PHONESto connect headphones.6PROG (PROGRAM)for CD.to programme disc tracks.for TUNER.to programme preset radiostations.for CLOCK.to select 12- or 24-hour clock mode.7BASS/TREBLEto select BASS or TREBLE sound feature.BASS/TREBLE+/-(on the remote control)to increase or decrease the low or high tonelevel for the respective BASS or TREBLE soundfeature selected.8wOOx(on the system only)to select the next wOOxlevel or switch off wOOx sound effect.(on the remote control only)to switch on or offthe wOOx sound effect. wOOx LEVEL(on the remote control only)to select a desiredwOOx level :WOOX 1,WOOX 2 orWOOX3.9VOL (VOLUME +/-)to increase or decrease the volume.(on the system only)to increase or decrease thelow or high tone level for the respective BASS orTREBLE sound feature selected.00 RECto start recording on a tape.!SOURCE to select the following:CD 123 (CD 123)to select disc tray 1,2 or 3.TUNERto select waveband :FM,MW or LW.TAPEto select tape mode.AUX / CDRto select a connected external source :CDR or AUX (auxiliary) mode.Mode Selection PLAY PAUSE ÉÅfor CD.to start or interrupt playback.for TAPE.to start playback.for PLUG & PLAY(on the system only)toinitiate and start plug & playmode.STOP/DEMO STOP Çfor CD.to stop playback or to clear aprogramme.for TUNER.to stop programming.(on the system only)to delete thepreset radio station.for TAPE.to stop playback or recording.for DEMO.(on the system only)to activate/deactivate the demonstration.for CLOCK.to exit clock setting or cancel timer.for PLUG & PLAY(on the system only)to exitplug & play mode.PREV / NEXT íë(PRESET43)for CD.to skip to the beginning of the current,previous,or next track.for TUNER.to select a preset radio station.for TAPE.to select tape side (back or front).for CLOCK.to set the minute.SEARCH / TUNE àáfor CD.to search backward/forward.for TUNER.totune to a lower or higher radiofrequency.for TAPE.to rewind or fast forward.for CLOCK.to set the hour.Controls ! & ¡ ª 9 6 £ 8*-+-+-( ) 79§#CD OPENCLOSE (CD 1/CD 2/CD 3) 0to open or close the individual disc tray :CD 1,CD 2 or CD 3$Disc trays%Display screento view the current status of the system.MUTEto interrupt or resume sound reproduction.&CD DIRECT 1/2/3to select a disc tray for playback.*IS (INCREDIBLE SURROUND)to activate or deactivate the surround soundeffect.(DIMto select various dim mode :DIM 1,DIM 2,DIM 3 or DIM OFF.)AUTO REV.(AUTO REVERSE)to select the desired tape playback modes.¡TIMERto display timer or set the timer.REPEATto playback track(s)/disc(s)/programmerepeatedly.£SHUFFLEto playback all available discs and their tracks/programme in random order.TIMER ON/OFFto activate or deactivate the timer function.NEWSto hear News automatically.§SLEEPto activate, deactivate or set the sleep timerfunction.RDSto select RDS information.CLOCKto display clock or set the clock.ªBto switch the system to Eco Power Standbymode.Notes for remote control:First,select the source you wish tocontrol by pressing one of the source selectkeys on the remote control (CD 123 orTUNER,for example).Then select the desired function (É,í,ë,for example).Brief Operating Instruction2-5Brief Operating InstructionPreparationsFM Antenna¶For better FM stereo reception, connect an outdoor FM antenna to the FM ANTENNAterminal.CSpeakers ConnectionFront SpeakersConnect the speaker wires to the SPEAKERS(FRONT) terminals,right speaker to “R“ and leftspeaker