Philips-MCM-704-D-Service-Manual电路原理图.pdf

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1、Version 1.1MCM704D 3141 785 31780DVD Micro theatreall versions Published by LX 0719 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 tran

2、smitted, 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

3、-3Software version check and upgrading .4-1Block diagram .5-1Wiring diagram .6-1VFD Board circuit diagram .7-1 layout diagram .7-2Tuner Boardcircuit diagram .8-1 layout diagram .8-2AMP Boardcircuit diagram .9-1.9-2 layout diagram .9-3CPU Board circuit diagram. .10-1layout diagram .10-2.10-3Exploded

4、view diagram .11-1Service partslist .12-1Commercial partslistTABLE 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 band

5、pass 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

6、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 hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50LRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTCD RECORDE

7、RUse 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 CONTROLS3 - 3CONNECTION AND CONTROLS4 - 1 4 - 1SOFTWARE VERSION CHECK AND UPGRADINGSET BLOCK DIAGRAM5 - 1 5 - 1