Philips-CED-320-CED-320-X-Service-Manual(1)电路原理图.pdf

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1、 CED320/55Copyright 2008 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior perm

2、ission of Philips.Published by JZ-SL 0845 Service Audio Printed in The Netherlands Subject to modificationCar Entertainment SystemVersion 1.1CLASS 1LASER PRODUCT 3141 785 33201TABLE OF CONTENTSPagePCBs Location .1-1Specifi cations .1-2Measurement Setup .1-3Service Aids, Safety Instruction, etc .1-4I

3、nstructures on CD Playability .1-5 to 1-6Disassembly Diagrams .2-1 to 2-2Software Version Check 1kHz,0dB,10K load)2.0V (CD play mode)“e500mV188x58x193mm1.9kgSystem:Frequency response:Signal/noise ratio:Total harmonic distortion:Channel separation:Video signal for mat:Video output:Disc digital audio

4、system20Hz-20k Hz75dBLess than 0.3%(1KHz)55dBNTSC/PAL/AUTO1+/0.2VScreen size:Display resolution:Active area:Dot pitch:Contrast ratio:Brightness:3.5 inches(16.91)320x234 dots76.32x42.822mm0.2385x0.183mm350220cd/mFrequency range-FMFrequency range-AM(MW)Usable sensitivity-FMUsable sensitivity-AM(MW)(S/

5、N=20dB)Frequency responseStereo separationSignal/noise ratio87.5-108.0MHz(Eur)65.0-74.0MHz(OIRT)87.5-107.9MHz(Ame)522-1620KHz(Eur)530-1710MHz(Ame)8uV30uV30Hz-15KHz30db(1KHz)55dBMEASUREMENT SETUPTuner FMDUTRF GeneratorBandpassLF Voltmetere.g. PM5326250Hz-15kHze.g. 7122 707 48001 e.g. PM2534S/N and di

6、stortion metere.g. Sound Technology ST1700BRi=50Use a bandpass filter to eliminate hum(50Hz,100Hz) and disturbance from the pilottone(19kHz,38kHz). Tuner AM (MW,LW)DUTRF GeneratorBandpassLF Voltmetere.g. PM5326250Hz-15kHze.g. 7122 707 48001 e.g. PM2534S/N and distortion metere.g. Sound Technology ST

7、1700BRi=50Frame aeriale.g. 7122 707 89001To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday s cage.Use a bandpass filter ( or at least a high pass filter with 250Hz) to eliminate hum ( 50Hz,100Hz ).DUT DUTLRLF Generatore.g. PM5110LEVEL METERe.g. Sennheiser UPM5

8、50with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BUse Audio Signal Disc SBC429 4822 397 30184(replaces test disc 3) CassetteUse Universal Test Cassette CrO2 SBC419 4822 397 30069

9、or Universal Test Cassette Fe SBC420 4822 397 30071CD1-31-4SERVICE AIDSGBGBWARNINGAll 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 potential

10、 as the massof the set via a wrist wrap with resistance.Keep components and tools also at thispotential.ESDCLASS 1LASER PRODUCTSafety regulations require that the set be restored to its originalcondition and that parts which are identical with those specified,be usedSafety components are marked by t

11、he symbol ! .Lead free1-5INSTRUCTIONS ON CD PLAYABILITYSet remains closed!check playabilityNNNYYYcheck playabilityExchange CDM“fast“ lens cleaningplayabilityok?playabilityok?playabilityok?$Customer complaint“CD related problem“Check playabilityPlay a CDfor at least 10 minutesann lnfo for customer“SE

12、T OK“ $areturn set$-$cFor description-see following pages$bFor flap loaders(=access to CD drive possible)clesning method$cis recommended1-6Disassembly Diagram2-1 2-120Press the release key first, then take out the panel.1234530Take out the top cover with a forceps. 10Pull out the mounting collar fro

13、m the main set with two L-keys.40Take out the bottom cover with a forceps. 50loosen and take out the bolt $with a screw-driver. 60loosen and take out the five bolts $awith a screw-driver, 70Pull out the two pieces of connection-pegs $bcarefully80loosen and take out the five bolts $cwith a screw-driv

14、er, 90loosen and take out the bolt $dwith a screw-driver, Disassembly Diagram2-2 2-26789100loosen and take out the bolt $ewith a screw-driver, 110loosen and take out the bolt $fwith a screw-driver, 120Pull out the two pieces of connection-pegs $gcarefully130Take out the knob from panel.140Loosen and take out the five bolts $hwith a screwdriver .