Philips-MFX-450-Service-Manual电路原理图.pdf
Service ManualSafety regulations require that the set be restored to its originalcondition and that parts which are indentical with those specifiedbe used.Copyright 2003 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.Published by MD 0309 Service Audio Printed in the Netherlands Subject to modification 3104 215 50220TABLE OF CONTENTSPageLocation Boards / System info . 1-2Technical Specification . 1-3Service Tool / Measurement setup / Safety . 1-4Warning / Handling Chip components . 1-5Abbreviations . 2Block diagram . 3Dismantling hints / Service positions . 4-1Wiring diagram . 4-3Service Test program . 5Front Board . 6ECO 5 Tuner diagram . 7Multi-Channel Decoding Module . 8Mains Board . 9Mono Board . 10Exploded view . 11Exploded view partslist . 12Electrical partslist Mono Board . 13DIGITALE A/V SURROUND RECEIVER MMX450/37MFX450/171-2LOCATION OF PRINTED CIRCUIT BOARDSTuner BoardScrew TerminalMDM BoardMono BoardFront BoardSecondary Trafo BoardMains BoardHeadphone BoardP50 & Subw. &Video Selector Board1-3SPECIFICATIONGeneralMains voltage : 120VMains frequency : 60HzPower concumption : 2W at stbyDimension. wxhxd : 435x138x350 mmRemote control : Multibrand/UniversalAmplifierOutput powerStereo mode (L+R) : 2x50W FTC(40Hz-20kHz, 0,7%THD, 6)Surround modeL + R : 2x60W (1kHz, 0,7%THD, 6)Center : 60W (1kHz, 0,7%THD, 6)Surround Left+Right : 2x60W (1kHz, 0,7%THD, 6)Distortion (5W)1kHz : 0,05%40Hz - 20kHz : 0,2%Headphone : 6,3mm stereo jack with switchOutput level : 3V EMF, 60Crosstalk between source 1kHz : -65dB(1W) 250Hz 10kHz : -60dBCrosstalk between channels -1kHz : -55dB(1W) 250Hz 10kHz : -50dBFrequency response : 10Hz 30kHz (-1dB)Power stage protection : Shortcircuit: DC (Vout 10V) for ±1secTemperature : Transformer ( 140º Celcius): Heatsink ( 140º Celcius)Audio SelectorAnalog Input sensitivityPhono : 5mV impedance 47k/220pfCD : 250mV impedance 47kCDR/TAPE : 250mV impedance 47kVCR : 250mV impedance 47kTV : 250mV impedance 47kSAT : 250mV impedance 47k6 CH/DVD : 250mV impedance 47kOutput levelCDR/TAPE : 250mV impedance 1kVCR : 250mV impedance 1kOutput level (variable)Subwoofer pre-out : 800mV impedance 1kCenter pre-out : 800mV impedance 1kDigital SelectorInput : 2 x cinch: 1 x opticalOutput : 1 x cinchVideo Selector - CVBSInput sensitivityDVD/VCR/TV : 1 Vpp impedance 75Output levelMonitor/VCR : 1 Vpp impedance 75Frequency response : 50Hz Æ 6MHzTone controleLoudness(volume -30dB Ref: 1kHz=0dB) : 100Hz +6 dB: 10kHz +2,5 dBTone control (Ref: 1kHz=0dB): Bass 100Hz -9dB Æ+9dB: Treble 10kHz -9dB Æ+9dBDSC settings 100Hz 1kHz 10kHzPersonal dB 0 0 0Movie dB + 4 +2 +4Speech dB - 4 +1 - 2Music dB + 4 - 1 +2Multimedia dB + 7 +3 +6Multi Channel Decoder - MDM2000MPEG5.1 / MPEG 7.1 (7.1 downmix to 5.1)Dolby Digital (AC-3)Digital Theater Systems (DTS)Linear PCM (up to 96kHz, 24 bits resolution)Automatic audio/data type detection (AC-3,dts,MPEG-2,PCM)Dolby Pro LogicMPEG-2 dual mono channel selection I/IIVirtual Dolby Surround (422/423)Virtual MPEG Digital (522/523)Virtual Dolby Digital (522/523)Virtual DTS Surround (522/523)Multi - Front / Multi - rear / Natural SurroundDigital Bass ManagementParallel Stereo DownmixFour Stereo (224)Volume ControlNoise Generator (test tone)Surround mode selectorDelay Center and Surround Left , Surround RightTuner - (ECO5)FMTuning range : 87.5 108MHzGrid : 100kHzIF frequency : 10.7MHz ±25kHzAerial input : 300 clickfitSensitivity at 26dB S/N : 2µvSelectivity at 300kHz : 55dBImage rejection : 48dBDistortion at RF=1mV,dev.75kHz : 0,9%-3dB Limiting point : 2µVCrosstalk at RF=1mV,dev.40kHz : 27dBMWTuning range : 530 - 1700kHzGrid : 10kHzIF frequency : 450kHz ±1kHzAerial input : Frame aerialSensitivity at 26dB S/N : 3,5mV/mSelectivity at 9kHz bandwidth : 18dBIF rejection : 64dBImage rejection : 28dBDistortion at RF=50mV,m=80% : 3%1-4Bandpass250Hz-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=50Tuner 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.Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50SERVICE TOOLMEASUREMENT SETUPSAFETYGBSafety 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 conNLVeiligheidsbepalingen vereisen, dat het apparaat in zijnoorspronkeliijke toestand wordt teruggebracht en datonderdelen, identiek aan de gespecificeerde, worden toegepast.De Veiligheidsonderdelen zijn aangeduid met het symboolSAFETYDBei 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 marquésAudio Signals Test Disc 1 . 4822 397 301841-5WARNINGGB 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.NL 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.ESDGB 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 13999HANDLING CHIP COMPONENTS2-1Aac 0VA AC 0 Voltageac 10VB AC 10 Voltageac 110VB AC 110 Voltageac 120VB AC 120 Voltageac gnd AC groundac h1 AC high voltage 1ac h2 AC high voltage 2ac l1 AC low voltage 1ac l2 AC low voltage 2ac1 AC voltage 1ac2 AC voltage 2ac3 AC voltage 3amp lr on Amplifier Left - Right Onamp mute c s Amplifier mute center surroundamp mute c s sub Amplifier mute center surroundsubwooferamp mute lr Amplifier mute Left - Rightamp pd Amplifier power downamp prot Amplifier protectionamp s on Amplifier surround Onamp stby Amplifier Standbyav gnd Audio groundav l Audio Leftav r Audio RightA/V Audio/VideoFf1 Filament 1f2 Filament 2fmute Fast muteGgnd d Ground digitalgnd s Ground signalHhp gnd Headphone groundhp l Headphone Lefthp on Headphone Onhp r Headphone Righthst Heatsink temperatureLls c Loudspeaker Centerls gnd Loudspeaker groundls l Loudspeaker Leftls r Loudspeaker RightMmdm Multi channel Decoding Modulemdm c out Center outmdm gnd groundmdm l dmix Downmix Leftmdm l in Left inmdm l out Left outmdm r dmix Downmix Rightmdm r in Right inmdm r out Right outmdm req requestmdm rst resetmdm scl I2C clockmdm sda I2C datamdm sl out surround Left outmdm sr out surround Right outmdm sub out subwoofer outmfd Mains failure detectionPp gnd P50 groundp p50 Cinema link P50 codeSs gnd Surround groundsofac scl Sofac I2C clocksofac1 sda1 Sofac 1 I2C data1sofac2 sda2 Sofac 2 I2C data2ss ce Source selector chipenabless clk Source selector clockss data Source selector datasurr pre-out Surround pre-outTtu clk Tuner clocktu da Tuner datatu en Tuner enabletu gnd Tuner groundtu l Tuner Lefttu r Tuner Righttu rds Tuner RDStu stereo Tuner stereoVv gnd Video groundv scl Video I2C clockv sda Video I2C datav sig Video signalv sub sur Video subwoofer surroundABBREVIATIONS3-1 3-1BLOCKDIAGRAM+5D+6+12protection 3F2F1-30-12+Vo oKey MatrixEepromIR EyeVolume controlSource selectorencoderMenu navigatorµPDisplayLed driveLeftRightCenterSurroundRightECO5Record pathCLKDATA+5D+5D +511xP50Reset+5D+9F1F2protection1,3ATTATTATTATTCDCDR/TapeVCRSATCDR/TapeVCRLOGICL/R inMDM 2000DECODERINGAINVOLLOUDBASSMIDTREBLESPKRATTLOGIC CONTROLINGAINVOLLOUDBASSMIDTREBLESPKRATTLOGIC CONTROLLRINGAINVOLLOUDBASSMIDTREBLESPKRATTLOGIC CONTROLCSUBSRATTMUTEHeadphoneLR+-+-+VMUTEMUTECenter pre-outSubwoofer pre-out+-+-SurroundLeft+-CSLSRStereo/Clock/Data/CETunercontrolRDS DECODERSource selctorcontrolSSCESSCLKSSDataMDMcontrolResetSCL/SDARequestSofaccontrolSDA1SCLSDA2HeadphonesenseSource selctorcontrolTunercontrolMDMcontrolSofaccontrolSofaccontrolSofaccontrolHeadphoneONMutecontrolAmp-ONAmp-ONAmp-ONAmp-ON0,33EMainsMFDElectric voltage selector+V+5D+5D+5DOutletOnly /01Only/01Currentbuffer+5D-30-30SDASCLVideo sel.controlRDS InfoRDS Data/Clk-V+V-VVoltageselectorDownmix outSLRIAALOGICSource selctorcontrolPHONOTVTOSCoax in 1 Coax in 2 Optical in Coax out+12+5+12sel+12-12-12sel+12sel-12sel+9+9+9+5mute+5mute+5mute+12+12-12Shift register+5Donly /00MFDprotection 1MuteMuteMuteSDA2SDA1SDA1-12V+12MDI 11-02-03Cinema Link627462751258SubC/Sub-V-12+12-12Amp StbyAmp Stby0,33EhstPTCMFX450/17+6 only in /00+57404142114227415741314237406/7407/7408740374097411/7412740562677251626862576261 62606258/62596262/62636276725772587908/791062517572-b7572-b7504750375017571790173017621/762214247601766115257660-a76627660-b15507411/74127655/765676587653/765476587651/7652765776417642764376447416/7417/74183915390133283301+5mute66491540hstPTCo o105610626265only in /00only in /17C/SubATTATTATTFront L/RC/SUBSL/SR6CH/DVD Input12601261107810791262 in/17 1256 in/00 4-1 4-1DISMANTLING HINTSsnapsnapDismantling of Front1) Remove top cover2) Remove power rod3) Remove 6 x screw as shown in picture 14) Release two snaps (left & right side front)5) Release two snaps on the bottom side front6) Tipp down front as shown in picture 2 picture 1picture 2Dismantling of mainstrafo3) Remove 12 x screws shown in mentionned aria . See picture 3 picture 31) Remove front . See picture 12) Remove whole front (disconnect the wires on the monoboard coming from front) picture 44) Remove wires out the cable-sleeve.5) Remove 7 x screw and remove metal bracket6) Remove 2 x screw on mono board . See pictue 47) Remove mono board as shown arrow 1 & 2 . See picture 48) Bring the mono board in the service position as shown in picture 512picture 5picture 6Service position monoboard1) Bring front in position as shown in picture 62) Snap nok of front in bottom to make front stable . See picture 7 3) Connect front wiring back to monoboard.*The tuner module doesn't have to be connected. Use an other source (pe.CD)picture 7picture 8Service position main trafo1) Remove power rod2) Remove 4x screw as shown in picture 81) Put main trafo as shown in picture 9picture 9snapPower rodMetal bracketDismantling of mono board11111 112211111= Torx M3x6mm ( screw with big head )Legend2= Torx 3x10mm 3= Torx M3x6mm Handling service cover1) To open the service cover cut 14 x lugs between cover and bottem . See picture 102) To close the service cover put 11 x screw in mentionned holes. See picture 10Service codenumber 12x Torx M3x6mm screw with big head = 4822 502 14659picture 10111111( )1cable-sleeve11 1 11111snap1 132224-2 4
