Philips-MCD708-cs-sm 电路图 维修手册.pdf

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1、Version 1.0 MCD708 3141 785 30730 Service Manual DVD Micro System all versions Published by LX 0539 Service Audio Printed in The Netherlands Subject to modification Copyright 2005 Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may be rep

2、roduced, 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. Handling chip components .1- 1 Information about lead- free soldering.1- 2 Technical specification.2- 1 Service tools.2- 1 Se

3、rvice measurement setup.2- 2 Connections and controls.3- 1.3- 4 Disassembly diagram.4- 1.4- 2 Software version and upgrading.5- 1 Set block diagram.5- 2 Set wiring diagram.5- 3 VFD BOARD circuit diagram .6- 1 layout diagram.6- 2 TUNER BOARD circuit diagram .7- 1 layout diagram.7- 2 layout diagram- a

4、mp box pcb assy.7- 2 AMP BOARD circuit diagram .8- 1 layout diagram.8- 2 CPU BOARD circuit diagram .9- 1 layout diagram.9- 2 ALC VOLUME BOARD circuit diagram .10- 1 layout diagram.10- 2 DVD MPEG BOARD circuit diagram.11- 1.11- 5 layout diagram.11- 6 Exploded view diagram.12- 1 Mechanical partslist.1

5、2- 2 Electrical partslist.13- 1.13- 4 TABLE OF CONTENTS CLASS 1 LASER PRODUCT 内部资料 RadioFans.CN 收音机爱 好者资料库 1 - 1 HANDLING CHIP COMPONENTS WARNING All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When

6、 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 beaucoup dautres semi-conducteurs sont sensibles aux dcharges statiques (ESD). Leur longvite pourrait t

7、re 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 serti dune rsistance de scurit. Veiller ce que les composants ainsi que les outils que lon utilise so

8、ient galement ce potentiel. d WARNUNG Alle ICs und viele andere Halbleiter sind empfindlich gegenber elektrostatischen Entladungen (ESD). Unsorgfltige Behandlung im Reparaturfall kann die Lebensdauer drastisch reduzieren. Sorgen Sie dafr, da Sie im Reparaturfall ber ein Puls- armband mit Widerstand

9、mit dem Massepotential des Gertes verbunden sind. Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesem Potential. WAARSCHUWING Alle ICs en vele andere halfgeleiders zijn gevoelig voor electrostatische ontladingen (ESD). Onzorgvuldig behandelen tijdens reparatie kan de levensduur drastisch doen v

10、ermindern. 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 potentiaal. i AVVERTIMENTO Tutti IC e parecchi semi-conduttori sono sensibili alle scariche statiche

11、(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 stesso potenziale che quello della massa delpparecchio tramite un braccialetto a resistenza. Assicurars

12、i che i componenti e anche gli utensili con quali si lavora siano anche a questo potenziale. 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 sicurez

13、za estigono che lapparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambiago identici a quelli specificati. Componenty di sicurezza sono marcati con Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkeliijke toestand wordt teruggebracht en dat ond

14、erdelen, identiek aan de gespecificeerde, worden toegepast. De Veiligheidsonderdelen zijn aangeduid met het symbool s Varning ! Osynlig laserstrlning nr apparaten r ppnad och sprren r urkopplad. Betrakta ej strlen. Advarsel ! Usynlig laserstrling ved bning nr sikkerhedsafbrydere er ude af funktion.

15、Undg udsaettelse for strling. Varoitus ! Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina nkymttmlle laseristeilylle. l katso steeseen ! f Pour votre scurite, ces documents doivent tre utiliss par des spcialistes agrs, seuls habilits rparer votre appareil en panne. ESD SAFETY d Bei

16、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 Les normes de scurit exigent que lappareil soit remis lta

17、t dorigine et que soient utilises les pices de rechange identiques celles spcifies. Les composants de scurit sont marqus CLASS 1 LASER PRODUCT DANGER: Invisible laser radiation when open. After servicing and before returning the set to customer perform a leakage current measurement test from all exp

18、osed metal parts to earth ground, to assure no shock hazard exists. The leakage current must not exceed 0.5mA. AVOID DIRECT EXPOSURE TO BEAM. HANDLING CHIP COMPONENTS 内部资料 RadioFans.CN 收音机爱 好者资料库 1 - 2 INFORMATION ABOUT LEAD-FREE SOLDERING Philips CE is producing lead-free sets from 1.1.2005 onwards

19、. IDENTIFICATION: Regardless of special logo (not always indicated) one must treat all sets from 1 Jan 2005 onwards, according next rules: Example S/N: Bottom line of typeplate gives a 14-digit S/N. Digit 5&6 is the year, digit 7&8 is the week number, so in this case 2005 wk12 So from 0501 onwards =

20、 from 1 Jan 2005 onwards Important note : In fact also products of year 2004 must be treated in this way as long as you avoid mixing solder-alloys ( leaded/ lead -free). So best to always use SAC305 and the higher temperat ures belong to this. Due to lead-free technology some rules have to be respec

21、ted by the workshop during a repair: Use only lead-free solder alloy Philips SAC305 with order code 0622 149 00106. If lead-free solder-paste is required, please contact the manufacturer of your solder-equipment. In general use of solder-paste within workshops should be avoided because paste is not

22、easy to store and to handle. Use only adequate solder tools applicable for lead-free solder alloy. The solder tool must be able o To reach at least a solder-temperature of 40 o To stabilize the adjusted temperature at the solder-tip o To exchange solder-tips for different applications. Adjust your s

23、older tool so that a temperature around is reached and stabilized at the solder joint. Heating-time of the solder-joint should not exceed 4 sec. Avoid temperatures above 400 otherwise wear-out of tips will rise drastically and flux-fluid will be destroyed. To avoid wear-out of tips switch off un-use

24、d equipment, or reduce heat. Mix of lead-free solder alloy / parts with leaded solder alloy / parts is possible but PHILIPS recommends strongly to avoid mixed solder alloy types (leaded and lead-free). If one cannot avoid or does not know whether product is lead-free, clean carefully the solder-join

25、t from old solder alloy and re-solder with new solder alloy (SAC305). Use only original spare-parts listed in the Service-Manuals. Not listed standard-material (commodities) has to be purchased at external companies. Special information for BGA-ICs: - always use the 12nc-recognizable soldering tempe

26、rature profile of the specific BGA (for de-soldering always use the lead-free temperature profile, in case of doubt) - lead free BGA-ICs will be delivered in so-called dry-packaging (sealed pack including a silica gel pack) to protect the IC against moisture. After opening, dependent of MSL-level se

27、en on indicator-label in the bag, the BGA-IC possibly still has to be baked dry. (MSL=Moisture Sensitivity Level). This will be communicated via AYS-website. Do not re-use BGAs at all. For sets produced before 1.1.2005 (except products of 2004), containing leaded solder-alloy and components, all nee

28、ded spare-parts will be available till the end of the service-period. For repair of such sets nothing changes. On our website www.atyourservice.ce.P you find more information to: BGA-de-/soldering (+ baking instructions) Heating-profiles of BGAs and other ICs used in Philips-sets You will find this

29、and more technical information within the magazine, chapter workshop news. For additional questions please contact your local repair-helpdesk. SERVICE INSTRUCTION 1. Unplug the AC Power cord and connect a wire between the two pins of the AC Power plug. 2. Set the AC Power switch to the on position (

30、keep the AC Power cord unplugged!). 3. Measure the resistance value between the pins of the AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be larger than 4.5 Mohm (For U.S. it should be between 4.2 Mohm and 12 Mohm). 4. Switch off the set,

31、and remove the wire between the two pins of the AC Power plug. Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points: Route the wire trees correctly and fix them with the mounted cable clamps. Check the

32、 insulation of the AC Power lead for external damage. Check the strain relief of the AC Power cord for proper function. Check the electrical DC resistance between the AC Power Plug and the secondary side (only for sets which have a AC Power isolated power supply): Check the cabinet for defects, to a

33、void touching of any inner parts by the customer. 内部资料 RadioFans.CN 收音机爱 好者资料库 2 - 1 TECHNICAL SPECIFICATIONS GENERAL Mains voltage-/93 -/93 : : Mains frequency 220V -/98 : 120/230V -/12 : 230V -/79 : 240V 50 Hz -/98:60 Hz -/12: 50/ 50 Hz -/79:50 Hz Battery remote : 3 V (AAA x 2) Power consumptionno

34、rmal55W Standby : 4 W Dimension (W x H x D): 147 x 232 x 223 mm Weight (excluding packing and batteries) : 5.15 Kg AMPLIFIER Output powermains mains : 2 x 50W Speaker impedance2 x 4 ohm Frequency response : : 20 Hz - 20 kHz (3dB) TUNER - FM SECTION Tuning range: 87.5 - 108 MHz IF frequency: 10.7 MHz

35、 0.02 MHz Sensitivity: 33 dB IF Rejection: 60 dB Image Rejection: 25dB Distortion : 12 dB :IF rejection: 24 dB Distortion : 20 dB DVD / MP3 / CD Laser Type : Semiconductor Disc Diameter : 12cm / 8cm Video Decoding : MPEG-2 / MPEG-1 Signal System : PAL / NTSC Video S/N : 53 dB (min.) Composite Video

36、Output : 1.0 Vp-p, 75 S-Video Output : Y - 1.0 Vp-p, 75 C - 0.286 Vp-p, 75 Audio DAC : 24 Bits / 96 kHz Frequency Response : 20 Hz - 20 kHz Channel Unbalance : 2dB THD Noise : 0.5% No. of programmable tracks : 20 Signal-to-noise ratio : 70 dBA Channel separation : 40 dB (1 kHz) : 35 dB (16 kHz) : 30

37、 dB (20 kHz) Total harmonic distortion : 0.02% (1 kHz) SERVICE TOOLS Audio signal disc SBC 429.4822 397 30184 Playability test disc SBC 444.4822 397 30245 Test disc 5(disc without errors ) + Test disc 5A (disc with dropout errors, black spots and fingerprints) SBC 426/426A.4822 397 30096 Burn in tes

38、t disc (65 min. 1kHz signal at -30 dB level without “pause”).4822 397 30155 anti-static table matlarge 1200 x650 x1.25mm 4822 466 10953 small 600 x650 x1.25m 4822 466 10958 anti-static wristband4822 395 10223 connection box (3 press stud connections, 1M) 4822 320 11307 extendible cable (2m, 2M, to c

39、onnect wristband to connection box) 4822 320 11305 connecting cable (3m, 2M, to connect table mat to connection box) 4822 320 11306 earth cable (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

40、 tester4822 344 13999 AVAILABLE ESD PROTECTION EQUIPMENT 内部资料 2 - 2 SERVICE MEASUREMENT Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT RF Generator e.g. PM5326 S/N and distortion meter e.g. Sound Technology ST1700B Tuner SW To avoid atmospheric interference all AM-measurements

41、 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). Ri=50 Aerial replacement Capacitor R=50 Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT S/N and distortion meter e.g. Sound Technology S

42、T1700B 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. RF Generator e.g. PM5326 Ri=50 Low pass filter 22kHz L R LEVEL METER e.g. Sennheiser UPM550 with FF-filter S/N and distortion meter e.g. Sound Tec

43、hnology ST1700B DUT CD Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3) L.P.F. = 13 th order filter 4822 395 30204 内部资料 3 - 1 Connections Step 2: Connecting speakers Connect the speaker wires to the SPEAKERS terminals, right speaker to “R” and left speaker to “L”, coloured (marked) wire to “+” and