Philips-MCM-720-Service-Manual电路原理图.pdf

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1、Version 1.1MCM720 3141 785 31001MP3 Micro Systemall versionsPublished by LX 0718 Service Audio Subject to modification Copyright 2006 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrievalsystem or transmi

2、tted, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.Repair policy of PCBS . 1-1Technical specification . 2-1Service tools . 2-1Service measurement setup . 2-2Connections and controls. 3-1.3-3Dismantling instructions . 4-1.4-3Bl

3、ock diagram. 5-1Wiring diagram . 6-1Main Board circuit diagram . 7-1.7-2layout diagram . 7-3.7-4C Music Boardcircuit diagram . 8-1.8-2layout diagram . 8-3.8-4Panel Boardcircuit diagram. . 9-1layout diagram . 9-2Cassette Boardcircuit diagram . 10-1 layout diagram . 10-2Tuner Boardcircuit diagram. .11

4、-1layout diagram .11-2Rectifier Boardcircuit diagram. . 12-1layout diagram . 12-2Exploded view diagram . 13-1Mechanical partslist . 13-2Electrical partslist . 14-1.14-7TABLE OF CONTENTSRevision list.15-11 - 1REPAIR POLICY OF PCBSVERSION VARIATIONS:Type /Versions:FeaturesBoard in used:MCM720Service p

5、olicy* TIPS : C - Component Lever Repair.M - Module Lever Repair - UsedCFeature diffrenceRDSVOLTAGE SELECTORECO STANDBY - DARKType /Versions:CCCCC/05 /12MAIN BOARDCASSETTE BOARDPANEL BOARDCMUSIC BOARDMCM720/05 /12TUNER BOARDCCCCCCRECTIFIER BOARD2 - 1TECHNICAL SPECIFICATIONS2 - 2SERVICE MEASUREMENT B

6、andpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BTuner FW Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).Ri=50Bandpass250Hz-15kHze.g. 7122 707 48001LF Vo

7、ltmetere.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 high pass filter with 250kHz) to eliminate hu

8、m (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50LRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTCD RECORDERUse Audio Signal Disc SBC429 4822 397 30184(replaces test disc 3)Use Universal Test Cassette Fe SBC420 4822 397 30071LRLEVEL METERe.g. Senn

9、heiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTLF Generator e.g. PM5110Ri=503 - 1CONNECTION AND CONTROLS8dcigdah(illustrations on page 3)8dcigdahdciZhnhiZbVcYgZbdiZXdcigda1:XdEdlZg$HI6C97NDCyidhliXiZhnhiZbdcdgid:XdEdlZghiVcYWn$cdgbVahiVcYWnliXadXYheaVn#29heaVnhXgZ

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16、VYZgcidiZhdXZidciZhZi#8dccZXicVcdc“JH7YZkXZJhZVXcXXVWaZidXdccZXi6JMCidiZVcVadjZVjYddjiiZgbcVahdVcZmiZgcVaZfjebZciIK!K8G!AVhZg9hXeaVnZg!9K9eaVnZgdg89GZXdgYZg#CdiZ/ ndjVgZXdccZXicZfjebZciliVbdcddjiejiVhcaZVjYddjiiZgbcVa!XdccZXiiidiZ6JMCaZiiZgbcVa#6aiZgcVikZan!ndjXVcjhZVhcaZidYdjWaZXcXXVWaZiZdjiejihdjc

17、YhiaagZbVcbdcd#EgZeVgVidchGZVgXdccZXidch The type plate is located at the rear of thesystem. For users in the U.K.:please follow theinstructions on page2.AEdlZg7ZdgZXdccZXiciZ68edlZgXdgYidiZlVaadjiaZi!ZchjgZiViVaadiZgXdccZXidchVkZWZZcbVYZ#WARNING! For optimal performance,use only theoriginal power c

18、able.Never make or change connections withthe powerswitched on.Toavoidoverheating of the system,a safetycircuit has been built in.Therefore,yoursystem may switch to Standby modeautomatically under extreme conditions.Ifthis happens,let the system cool downbeforereusing it cdiVkVaVWaZdgVaakZghdch.B6ci

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