Philips-MMX-450-Service-Manual.pdf

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1、Service Manual Safety regulations require that the set be restored to its original condition and that parts which are indentical with those specified be used. Copyright 2003 Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may be reproduce

2、d, stored in a retrieval system 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 modification3104 215 50220 TABLE OF CONTENTS Page Location

3、 Boards / System info .1-2 Technical Specification .1-3 Service Tool / Measurement setup / Safety .1-4 Warning / Handling Chip components .1-5 Abbreviations .2 Block diagram .3 Dismantling hints / Service positions .4-1 Wiring diagram . 4-3 Service Test program . 5 Front Board .6 ECO 5 Tuner diagram

4、 .7 Multi-Channel Decoding Module .8 Mains Board .9 Mono Board .10 Exploded view .11 Exploded view partslist .12 Electrical partslist Mono Board .13 DIGITALE A/V SURROUND RECEIVERMMX450/37 MFX450/17 1-2 LOCATION OF PRINTED CIRCUIT BOARDS Tuner Board Screw Terminal MDM Board Mono Board Front Board Se

5、condary Trafo Board Mains Board Headphone Board P50 & Subw. & Video Selector Board 1-3 SPECIFICATION General Mains voltage: 120V Mains frequency: 60Hz Power concumption: 2W at stby Dimension. wxhxd: 435x138x350 mm Remote control: Multibrand/Universal Amplifier Output power Stereo mode (L+R): 2x50W F

6、TC (40Hz-20kHz, 0,7%THD, 6) Surround mode L + 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 switch Output level: 3V EMF, 60 Crosstalk between source 1kHz: -65dB

7、 (1W) 250Hz 10kHz: -60dB Crosstalk between channels -1kHz: -55dB (1W) 250Hz 10kHz: -50dB Frequency response: 10Hz 30kHz (-1dB) Power stage protection: Shortcircuit : DC (Vout 10V) for 1sec Temperature: Transformer ( 140 Celcius) : Heatsink ( 140 Celcius) Audio Selector Analog Input sensitivity Phono

8、: 5mV impedance 47k/220pf CD: 250mV impedance 47k CDR/TAPE: 250mV impedance 47k VCR: 250mV impedance 47k TV: 250mV impedance 47k SAT: 250mV impedance 47k 6 CH/DVD: 250mV impedance 47k Output level CDR/TAPE: 250mV impedance 1k VCR: 250mV impedance 1k Output level (variable) Subwoofer pre-out: 800mV i

9、mpedance 1k Center pre-out: 800mV impedance 1k Digital Selector Input: 2 x cinch : 1 x optical Output: 1 x cinch Video Selector - CVBS Input sensitivity DVD/VCR/TV: 1 Vpp impedance 75 Output level Monitor/VCR: 1 Vpp impedance 75 Frequency response: 50Hz ? 6MHz Tone controle Loudness (volume -30dB Re

10、f: 1kHz=0dB): 100Hz +6 dB : 10kHz +2,5 dB Tone control (Ref: 1kHz=0dB) : Bass 100Hz -9dB ?+9dB : Treble 10kHz -9dB ?+9dB DSC settings100Hz1kHz10kHz PersonaldB 0 0 0 MoviedB + 4+2 +4 SpeechdB - 4+1 - 2 MusicdB + 4- 1 +2 MultimediadB + 7+3 +6 Multi Channel Decoder - MDM2000 MPEG5.1 / MPEG 7.1 (7.1 dow

11、nmix 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 Logic MPEG-2 dual mono channel selection I/II Virtual Dolby Surround (422/423) Virtual MPEG Digital (522/523) Virtual Dolby

12、 Digital (522/523) Virtual DTS Surround (522/523) Multi - Front / Multi - rear / Natural Surround Digital Bass Management Parallel Stereo Downmix Four Stereo (224) Volume Control Noise Generator (test tone) Surround mode selector Delay Center and Surround Left , Surround Right Tuner - (ECO5) FM Tuni

13、ng range: 87.5 108MHz Grid: 100kHz IF frequency: 10.7MHz 25kHz Aerial input: 300 clickfit Sensitivity at 26dB S/N: 2v Selectivity at 300kHz: 55dB Image rejection: 48dB Distortion at RF=1mV,dev.75kHz: 0,9% -3dB Limiting point: 2V Crosstalk at RF=1mV,dev.40kHz: 27dB MW Tuning range: 530 - 1700kHz Grid

14、: 10kHz IF frequency: 450kHz 1kHz Aerial input: Frame aerial Sensitivity at 26dB S/N: 3,5mV/m Selectivity at 9kHz bandwidth: 18dB IF rejection: 64dB Image rejection: 28dB Distortion at RF=50mV,m=80%: 3% 1-4 Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT RF Generator e.g. PM532

15、6 S/N and distortion meter e.g. Sound Technology ST1700B Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz). Ri=50 Tuner FM Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT S/N and distortion meter e.g. Sound Technology ST1700B

16、 Frame aerial e.g. 7122 707 89001 Tuner 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 high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz). RF Generator e.g. PM5326 Ri=50 SERVICE TOOL MEASUREMEN

17、T SETUP SAFETY GB Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used. Safety components are marked by the symbol I Le norme di sicurezza estigono che lapparecchio venga rimesso nelle condizioni originali e che

18、 siano utilizzati i pezzi di ricambiago identici a quelli specificati. Componenty di sicurezza sono marcati con NL Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkeliijke toestand wordt teruggebracht en dat onderdelen, identiek aan de gespecificeerde, worden toegepast. De Veilighei

19、dsonderdelen zijn aangeduid met het symbool SAFETY D Bei jeder Reparatur sind die geltenden Sicherheitsvor- schriften zu beachten. Der Originalzustand des Gertes darf nicht verndert werden. Fr Reparaturen sind Original- ersatzteile zu verwenden. Sicherheitsbauteile sind durch das Symbol markiert. F

20、Les normes de scurit exigent que lappareil soit remis ltat dorigine et que soient utilises les pices de rechange identiques celles spcifies. Les composants de scurit sont marqus Audio Signals Test Disc 1 . 4822 397 30184 1-5 WARNING GB WARNING All ICs and many other semiconductors are susceptible to

21、 electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wristband with resistance. Keep components and tools at this potential. F ATTENTION Tous les IC et beauc

22、oup dautres semi-conducteurs sont sensibles aux dcharges statiques (ESD). Leur longvite pourrait tre considrablement courte par le fait quaucune prcaution nst prise leur manipulation. Lors de rparations, sassurer de bien tre reli au mme potentiel que la masse de lappareil et enfileer le bracelet ser

23、ti dune rsistance de scurit. Veiller ce que les composants ainsi que les outils que lon utilise soient galement ce potentiel. D WARNUNG Alle ICs und viele andere Halbleiter sind empfindlich gegenber elektrostatischen Entladungen (ESD). Unsorgfltige Behandlung im Reparaturfall kann die Lebensdauer dr

24、astisch reduzieren. Sorgen Sie dafr, da sie im Reparaturfall ber ein Puls- armband mit Widerstand mit dem Massepotential des Gertes verbunden sind. Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesem Potential. NL WAARSCHUWING Alle ICs en vele andere halfgeleiders zijn gevoelig voor electrostat

25、ische ontladingen (ESD). Onzorgvuldig behandelen tijdens reparatie kan de levensduur drastisch doen vermindern. Zorg ervoor dat u tijdens reparatie via een polsband met weerstand verbonden bent met hetzelfde potentiaal als de massa van het apparaat. Houd componenten en hulpmiddelen ook op ditzelfde

26、potentiaal. I AVVERTIMENTO Tutti IC e parecchi semi-conduttori sono sensibili alle scariche statiche (ESD). La loro longevit potrebbe essere fortemente ridatta in caso di non osservazione della pi grande cauzione alla loro manipolazione. Durante le riparationi occorre quindi essere collegato allo st

27、esso potenziale che quello della massa delpparecchio tramite un braccialetto a resistenza. Assicurarsi che i componenti e anche gli utensili con quali si lavora siano anche a questo potenziale. ESD GB AVAILABLE ESD PROTECTION EQUIPMENT : anti-static table matlarge 1200 x650 x1.25mm4822 466 10953 sma

28、ll 600 x650 x1.25mm4822 466 10958 anti-static wristband4822 395 10223 connection box (3 press stud connections, 1M )4822 320 11307 extendible cable (2m, 2M , to connect wristband to connection box)4822 320 11305 connecting cable (3m, 2M , to connect table mat to connection box)4822 320 11306 earth c

29、able (1M , to connect any product to mat or to connection box)4822 320 11308 KIT ESD3 (combining all 6 prior products - small table mat)4822 310 10671 wristband tester4822 344 13999 HANDLING CHIP COMPONENTS 2-1 A ac 0VAAC 0 Voltage ac 10VBAC 10 Voltage ac 110VBAC 110 Voltage ac 120VBAC 120 Voltage a

30、c gndAC ground ac h1AC high voltage 1 ac h2AC high voltage 2 ac l1AC low voltage 1 ac l2AC low voltage 2 ac1AC voltage 1 ac2AC voltage 2 ac3AC voltage 3 amp lr onAmplifier Left - Right On amp mute c sAmplifier mute center surround amp mute c s sub Amplifier mute center surround subwoofer amp mute lr

31、Amplifier mute Left - Right amp pdAmplifier power down amp protAmplifier protection amp s onAmplifier surround On amp stbyAmplifier Standby av gndAudio ground av lAudio Left av rAudio Right A/VAudio/Video F f1Filament 1 f2Filament 2 fmuteFast mute G gnd dGround digital gnd sGround signal H hp gndHea

32、dphone ground hp lHeadphone Left hp onHeadphone On hp rHeadphone Right hstHeatsink temperature L ls cLoudspeaker Center ls gndLoudspeaker ground ls lLoudspeaker Left ls rLoudspeaker Right M mdmMulti channel Decoding Module mdm c out Center out mdm gnd ground mdm l dmix Downmix Left mdm l in Left in

33、mdm l out Left out mdm r dmix Downmix Right mdm r in Right in mdm r out Right out mdm req request mdm rst reset mdm scl I2C clock mdm sda I2C data mdm sl out surround Left out mdm sr out surround Right out mdm sub out subwoofer out mfdMains failure detection P p gndP50 ground p p50Cinema link P50 co

34、de S s gndSurround ground sofac sclSofac I2C clock sofac1 sda1Sofac 1 I2C data1 sofac2 sda2Sofac 2 I2C data2 ss ceSource selector chipenable ss clkSource selector clock ss dataSource selector data surr pre-outSurround pre-out T tu clkTuner clock tu daTuner data tu enTuner enable tu gndTuner ground t

35、u lTuner Left tu rTuner Right tu rdsTuner RDS tu stereoTuner stereo V v gndVideo ground v sclVideo I2C clock v sdaVideo I2C data v sigVideo signal v sub surVideo subwoofer surround ABBREVIATIONS 3-13-1 BLOCKDIAGRAM +5D +6 +12 protection 3 F2 F1 -30 -12 +V o o Key Matrix Eeprom IR Eye Volume control

36、Source selector encoder Menu navigator PP Display Led drive Left Right Center Surround Right ECO5 Record path CLK DATA +5D +5D+5 11x P50 Reset +5D +9 F1 F2 protection1,3 ATT ATT ATT ATTCD CDR/Tape VCR SAT CDR/Tape VCR LOGIC L/R in MDM 2000 DECODER IN GAIN VOL LOUD BASS MID TREBLE SPKR ATT LOGIC CONT

37、ROL IN GAIN VOL LOUD BASS MID TREBLE SPKR ATT LOGIC CONTROL L R IN GAIN VOL LOUD BASS MID TREBLE SPKR ATT LOGIC CONTROL C SUB SR ATT MUTE Headphone L R + - + - +V MUTE MUTE Center pre-out Subwoofer pre-out + - + - Surround Left + - C SL SR Stereo/Clock/Data/CE Tuner control RDS DECODER Source selcto

38、r control SSCE SSCLK SSData MDM control Reset SCL/SDA Request Sofac control SDA1 SCL SDA2 Headphone sense Source selctor control Tuner control MDM control Sofac control Sofac control Sofac control Headphone ON Mute control Amp-ON Amp-ON Amp-ON Amp-ON 0,33E Mains MFD Electric voltage selector +V +5D

39、+5D +5D Outlet Only /01 Only/01 Current buffer +5D -30 -30 SDA SCL Video sel. control RDS Info RDS Data/Clk -V +V -V Voltage selector Downmix out SL RIAA LOGIC Source selctor control PHONO TV TOS Coax in 1 Coax in 2 Optical in Coax out +12 +5 +12sel +12 -12 -12sel +12sel -12sel +9 +9 +9 +5mute +5mut

40、e +5mute +12 +12 -12 Shift register +5D only /00 MFD protection 1 Mute Mute Mute SDA2 SDA1 SDA1 -12V +12 MDI 11-02-03 Cinema Link 6274 6275 1258 Sub C/Sub -V -12 +12 -12 Amp Stby Amp Stby 0,33E hst PTC MFX450/17 +6 only in /00 +5 7404 1421 1422 7415 7413 1423 7406/7407/7408 7403 7409 7411/7412 7405

41、6267 7251 6268 6257 6261 6260 6258/6259 6262/6263 6276 7257 7258 7908/7910 6251 7572-b 7572-b 7504 7503 7501 7571 7901 7301 7621/7622 1424 7601 7661 1525 7660-a 76627660-b 1550 7411/7412 7655/7656 7658 7653/7654 7658 7651/7652 7657 7641 7642 7643 7644 7416/7417/7418 3915 3901 3328 3301 +5mute 6649 1

42、540 hst PTC o o 1056 1062 6265 only in /00 only in /17 C/Sub ATT ATT ATT Front L/R C/SUB SL/SR 6CH/DVD Input 1260 1261 1078 1079 1262 in/17 1256 in/00 4-14-1 DISMANTLING HINTS snapsnap Dismantling of Front 1) Remove top cover 2) Remove power rod 3) Remove 6 x screw as shown in picture 1 4) Release t

43、wo snaps (left & right side front) 5) Release two snaps on the bottom side front 6) Tipp down front as shown in picture 2 picture 1 picture 2 Dismantling of mainstrafo 3) Remove 12 x screws shown in mentionned aria . See picture 3 picture 3 1) Remove front . See picture 1 2) Remove whole front (disc

44、onnect the wires on the mono board coming from front) picture 4 4) Remove wires out the cable-sleeve. 5) Remove 7 x screw and remove metal bracket 6) Remove 2 x screw on mono board . See pictue 4 7) Remove mono board as shown arrow 1 & 2 . See picture 4 8) Bring the mono board in the service positio

45、n as shown in picture 5 1 2 picture 5 picture 6 Service position monoboard 1) Bring front in position as shown in picture 6 2) Snap nok of front in bottom to make front stable . See picture 7 3) Connect front wiring back to monoboard. *The tuner module doesnt have to be connected. Use an other source (pe.CD) picture 7 picture 8 Service position main trafo 1) Remove power rod 2) Remove 4x screw as shown in picture 8 1) Put main trafo as shown in picture 9 picture 9 snap Power rod Metal bracket Dismantling of mono board 1 1 1 1 11 1 2 2 1 1 1 1 1 = Torx M3x6mm ( screw with big head ) Legend 2