Philips-FWM-208-Service-Manual电路原理图.pdf

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1、Version 1.1FWM2083141 785 34921120W Mini Hi-Fi System-/55/77Published by LX 1010 Service Audio Subject to modificationCopyright 2010 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrievalsystem or transmit

2、ted, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.CONTENTSTechnical specification .1-2 Service measurement setup.1-3 Service aids .1-4 Instructions on CD playability .2-1.2-2Block diagram .3-1Wiring diagram.3-2AMP boardCircuit

3、 diagram .4-1 Layout diagram .4-2.4-5LCD boardCircuit diagram .5-1 Layout diagram .5-2.5-3CD boardCircuit diagram .6-1.6-2 Layout diagram .6-3.6-4Exploded view diagram .7-1Revision list.8-1AmplifierRated Output Power 4X30W RMSFrequency Response 63 - 16000 Hz, 3dBSignal to Noise Ratio 62dBDiscLaser T

4、ype SemiconductorDisc Diameter 12cm/8cmSupportDisc CD-DA,CD-R,CD-RW, MP3-CD,WMA-CDAudio DAC 24Bits / 44.1kHzTotal HarmonicDistortion65dBATunerFMTuning Range 87.5 - 108 MHzTuning grid 50 KHzSensitivity- Mono, 26dB S/N Ratio- Stereo, 46dB S/N Ratio45 dBMWTuning Range 530 - 1700 kHzSpeakersSpeaker Impe

5、dance 4ohmGeneral informationAC power 110 - 127V/220 - 240V, 50/60HzOperation powerconsumption55WStandby powerconsumption8WUSB direct Version 2.0/1.1Dimensions- Main Unit (W x H x D)- Speaker Box (W x H xD)292 x 285 x 220mm310 x 207 x 186mmWeight- Main Unit-SpeakerBox3.8 kg1.3 kgTECHNICAL SPECIFICAT

6、ION1 - 21-3LF Generator e.g. PM5110RecorderUse 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

7、 and distortion metere.g. Sound Technology 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 atmosp

8、heric 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 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

9、and distortion metere.g. Sound Technology 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).Care

10、less handling during repair can reduce 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 re

11、stored to its originalcondition and 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 ?che

12、ck playabilitycheck playabilityreturn 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 wh

13、ich are compatible with CD-RW discsuse 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 r

14、easonable timeFor all other sets use 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/

15、backward (search) within a reasonable 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 rem

16、ain, the customeris requested to contact 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

17、of the lens is synthetic and coatedwith 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

18、 gently (dont press too hard) with a 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 lens.INSTRUCTIONS ON CD PLAYABILITY2 - 2SET BLOCK DIAGRAM3 - 1 3 - 1SET WIRING DIAGRAM3 - 2 3 - 24 - 14 - 1CIRCUIT DIAGRAM - AMP BOARD4 - 2 4 - 2LAYOUT DIAGARM - AMP BOARDTOP SIDE VIEW