Philips-MAS-55-Service-Manual电路原理图.pdf

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1、Version 1.1FWC5, MAS55 3141 785 30351Mini Systemall versions Published by YT 0521 Service Audio Printed in The Netherlands Subject to modification Copyright 2005 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in

2、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 . 2-2C

3、onnections and controls . 3-1.3-3Disassembly diagram . 4-1Block diagram . 5-1Wiring diagram . 5-2Radio boardcircuit diagram . 6-1layout diagram . 6-2Cassette boardcircuit diagram . 7-1layout diagram . 7-2CD boardcircuit diagram. . 8-1layout diagram . 8-2Control and Main boardcircuit diagram (control

4、 board) . 9-1circuit diagram (main board) . 9-2layout diagram . 9-3Exploded view diagram . 10-1 .10-2Mechanical partslist . 10-2Electrical partslist .11-1TABLE OF CONTENTS1 - 1HANDLING CHIP COMPONENTS1 - 22 - 12 - 2SERVICE MEASUREMENTBandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF

5、 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

6、 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 hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50LRLEVEL METERe.g. Senn

7、heiser 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 Techn

8、ology ST1700BDUTLF Generator e.g. PM5110Ri=503 - 1CONNECTION AND CONTROLS3 - 2CONNECTION AND CONTROLSxx3 - 3CONNECTION AND CONTROLSFor more information onoperation instruction please visit Philips Audio internet site : http:/xx4 - 1DISASSEMBLY DIADRAMSA. Remove Back Cabinet Screws SP3x10 (2 pcs.) Screws SP3x25 (5 pcs.) Screws SP3x8 (5 pcs.)B. Remove Top Cabinet and Main PCB Assembly Screws SP3x10 Washer head (3 pcs.)xx5 - 1BLOCK DIADRAMS