Philips-MCM-177-Service-Manual电路原理图.pdf

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1、Version 1.0MCM1773141 785 32470Micro Hi-Fi System-/12/05Published by LX 0805 Service Audio Subject to modification Copyright 2008 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrievalsystem or transmitted

2、, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.CONTENTSTechnical specification .1-2Service measurement setup.1-3Service aids .1-4Instructions on CD playability .2-1. 2-2Disassembly diagram. .3-1Block diagram .4-1Wiring diagram

3、 .4-2 Main boardCircuit diagram .5-1.5-3 Layout diagram .5-4.5-5Display boardCircuit diagram .6-1 Layout diagram .6-2Exploded view diagram .9-1Mechanical parts list .9-2Electrical parts list.10-1.10-2AMPLIFIEROutput power . 2 x 10W RMSSignal-to-noise ratio. 60 dBA (IEC)Frequency response . 125 16000

4、 HzImpedance loudspeakers . 4CD PLAYERFrequency range . 125 16000 HzSignal-to-noise ratio. 65 dBATUNERFM wave range . 87.5 108 MHzSensitivity at 75 FM 26 dB sensitivity . 20 VTotal harmonic distortion. 5%SPEAKERSBass reflex systemDimensions (w x h x d) . 160 x 250 x 180 (mm)GENERAL INFORMATIONAC Pow

5、er . 100 240V, 50/60 HzDimensions (w x h x d) .232 x 85 x 275 (mm)Weight (with speakers) . approx. 5 kgPower consumptionActive . 30 WStandby . 5 WEco Power Standby . 1 WSpecifications and external appearance aresubject to change without notice.TECHNICAL SPECIFICATION1 - 21-3LF Generator e.g. PM5110R

6、ecorderUse Universal Test Cassette CrO2 SBC419 4822 397 30069LEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metee.g. Sound Technology ST170LRDUTor Universal Test Cassette Fe SBC420 4822 397 30071LEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Tech

7、nology ST1700BLRDUTCDUse Audio Signal Disc(replaces test disc 3)SBC429 4822 397 30184Bandpass250Hz-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-measuremen

8、ts 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).RF Generator e.g. PM5326Ri=50:Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Techn

9、ology ST1700BUse a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).Ri=50:Tuner FMMEASUREMENT SETUP1-4SERVICE AIDSGB WARNINGAll ICs and many other semi-conductors aresusceptible to electrostatic discharges (ESD).Careless handling during repair can redu

10、ce lifedrastically.When repairing, make sure that you areconnected with the same potential as the massof the set via a wrist wrap with resistance.Keep components and tools also at thispotential.ESDCLASS 1LASER PRODUCTGBSafety regulations require that the set be restored to its originalcondition and

11、that parts which are identical with those specified,be usedSafety components are marked by the symbol!.Lead freeSet remains closed!NYPlay a CD for at least 10 minutesYplayabilityok ?Nplayabilityok ?add Info for customer“SET OK“check playabilityNYplayabilityok ?check playabilitycheck playabilityretur

12、n setCustomer complaint“CD related problem“fast“ lens cleaning123For flap loaders (= access to CD drive possible)cleaning method 4 is recommendedINSTRUCTIONS ON CD PLAYABILITY2 - 1Exchange CDM1 - 4 For description - see following pages1PLAYABILITY CHECKFor sets which are compatible with CD-RW discsu

13、se CD-RW Printed Audio Disc.7104 099 96611TR 3 (Fingerprint)TR 8 (600 Black dot) maximum at 01:00 playback of these two tracks without audible disturbanceplaying time for: Fingerprint 10secondsBlack dot from 00:50 to 01:10 jump forward/backward (search) within a reasonable timeFor all other sets use

14、 CD-DA SBC 444A.4822 397 30245TR 14 (600 Black dot) maximum at 01:15TR 19 (Fingerprint)TR 10 (1000 wedge) playback of all these tracks without audible disturbanceplaying time for: 1000 wedge 10secondsFingerprint 10secondsBlack dot from 01:05 to 01:25 jump forward/backward (search) within a reasonabl

15、e time2CUSTOMER INFORMATIONIt is proposed to add an addendum sheet to the set whichinforms the customer that the set has been checkedcarefully - but no fault was found.The problem was obviously caused by a scratched, dirty orcopy-protected CD. In case problems remain, the customeris requested to con

16、tact the workshop directly. The lens cleaning (method 3) should be mentioned in theaddendum sheet.The final wording in national language as well as the printingis under responsibility of the Regional Service Organizations.4LIQUID LENS CLEANINGBecause the material of the lens is synthetic and coatedw

17、ith a special anti-reflectivity layer, cleaning must be donewith a non-aggressive cleaning fluid. It is advised to use“Cleaning Solvent The actuator is a very precise mechanical component andmay not be damaged in order to guarantee its full function.Clean the lens gently (dont press too hard) with a

18、 soft andclean cotton bud moistened with the special lens cleaner.The direction of cleaning must be in the way as indicated inthe picture below.Before touching the lens it is advised to clean thesurface of the lens by blowing clean air over it.This to avoid that little particles make scratches onthe

19、 lens.INSTRUCTIONS ON CD PLAYABILITY2 - 2DISASSEMBLY DIAGRAMDismantling of the Bottom CabinetDismantling of the PCB Board1)Remove 7 screws A as indicated to loosen the Bottom Cabinet.3)Remove 12 screws C&D as indicated to loosen the Main&Display Board.2)Remove 5 screws B before dismantling of the PCB Board “C“.SET BLOCK DIAGRAM4 - 1 4 - 1SET WIRING DIAGRAM4 - 2 4- 25 - 15 - 1CIRCUIT DIAGRAM - MAIN BOARDCD & MP3 PART