Philips-MCM-726-Service-Manual电路原理图.pdf
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Philips-MCM-726-Service-Manual电路原理图.pdf
Version 1.0MCM726© 3141 785 31790MP3 Micro Hi-Fi Systemall versions Published by LX 0717 Service Audio Subject to modification© Copyright 2007 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.Handling chip components . 1-1Leadfree and safety information . 1-2Technical specification . 2-1Service tools . 2-1Service measurement setup . 2-2Connections and controls. 3-1.3-2Dismantling instructions . 4-1.4-3Block 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 . 8-3.8-4VFD Boardcircuit diagram. . 9-1layout diagram . 9-2Cassette Boardcircuit diagram . 10-1 layout diagram . 10-2Tuner Boardcircuit diagram. .11-1layout diagram .11-2Rectifier Boardcircuit diagram. . 12-1layout diagram . 12-2Exploded view diagram . 13-1Mechanical partslist . 13-2Electrical partslist . 14-1.14-5Supplier BomlistTABLE OF CONTENTS1 - 11 - 22 - 1TECHNICAL SPECIFICATIONS2 - 2SERVICE MEASUREMENTBandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BTuner FWUse a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).Ri=50Bandpass250Hz-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 250kHz) to eliminate hum (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. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTLF Generator e.g. PM5110Ri=503 - 1CONNECTION AND CONTROLS3 - 2CONNECTION AND CONTROLS5 - 1 5 - 1SET BLOCK DIAGRAM6 - 16 - 1SET WIRING DIAGRAM7 - 17 - 1CIRCUIT DIAGRAM - MAIN BOARDPART 1
