Philips-FWC-143-Service-Manual(1)电路原理图.pdf
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1、Version 1.0FWC1433141 785 32460Mini Hi-Fi System-/12/05Published by LX 0804 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. .3-1.3-2Block diagram .4-1Wiring diag
3、ram .4-2 CD boardCircuit diagram .5-1 Layout diagram .5-2.5-3Radio boardCircuit diagram .6-1 Layout diagram .6-2Control boardCircuit diagram .7-1Layout diagram .7-2.7-3Power & AMP boardCircuit diagram .8-1 Layout diagram .8-2.8-3Exploded view diagram .9-1Mechanical parts list .9-2Electrical parts li
4、st.10-1.10-2AMPLIFIEROutput power . 2 x 10 W RMSSignal-to-noise ratio. 62 dBA (IEC)Frequency response . 63 16000 Hz, 3 dBImpedance loudspeakers . 8Impedance headphones . 32 1000 CD PLAYERFrequency range . 63 16000 HzSignal-to-noise ratio. 65 dBATUNERFM wave range . 87.5 108 MHzMW wave range . 526.5+
5、0/-20 1606.5+50/-0 kHzTAPE DECKFrequency responseNormal tape (type I).125 8000 Hz (8 dB)Signal-to-noise ratioNormal tape (type I). 35 dBAWo w and flutter . 0.4% DINSPEAKERSBass reflex systemDimensions (w x h x d) . 190 x 292 x 182 (mm)GENERAL INFORMATIONAC Power . 220 230 V / 50 HzDimensions (w x h
6、x d) . 220 x 292 x 285 (mm)Weight (with/without speakers) . approx. 4.9 / 2.3 kgSpecifications and external appearance aresubject to change without notice.TECHNICAL SPECIFICATION1 - 21-3LF Generator e.g. PM5110RecorderUse Universal Test Cassette CrO2 SBC419 4822 397 30069LEVEL METERe.g. Sennheiser U
7、PM550with 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 Technology ST1700BLRDUTCDUse Audio Signal Disc(replaces test disc 3)SBC429 4822 397 30184Band
8、pass250Hz-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 Faradays cage.Use a bandpass filter (or at least a high pa
9、ss 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 Technology ST1700BUse a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from th
10、e 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 reduce lifedrastically.When repairing, make sure that you areconnected with the same potentia
11、l 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 that parts which are identical with those specified,be usedSafety components are marked b
12、y 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 playabilityreturn setCustomer complaint“CD related problem“fast“ lens cleaning123For flap loaders (= acce
13、ss 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 discsuse CD-RW Printed Audio Disc.7104 099 96611TR 3 (Fingerprint)TR 8 (600 Black dot) maximum
14、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 CD-DA SBC 444A.4822 397 30245TR 14 (600 Black dot) maximum at 01:15TR 19 (Fingerprint)TR
15、 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 reasonable time2CUSTOMER INFORMATIONIt is proposed to add an addendum sheet to the set whichinform
16、s 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 contact the workshop directly. The lens cleaning (method 3) should be mentioned in theaddend
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