Philips-MCD-170-Service-Manual电路原理图.pdf

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1、Version 1.2MCD1703141 785 33302DVD Micro Theater-/98/12/58Published by LX 0923 Service Audio Subject to modificationCopyright 2009 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrievalsystem or transmitte

2、d, 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 .2-1.2-2Disassembly diagram. .,.3-1Block diagram.4-1Wiring dia

3、gram .4-2Main boardCircuit diagram .5-1.5-2Layout diagram.5-3.5-4Front boardCircuit diagram .6-1Layout diagram.6-2.6-3Tape boardCircuit diagram .7-1Layout diagram.7-2.7-3DVD boardCircuit diagram .8-1.8-5Layout diagram.8-6Exploded view diagram .9-1Mechanical parts list.9-2.9-3Electrical parts list.10

4、-1TunerTuning Range FM: 87.5 - 108 MHz; MW:531 - 1602 kHzTuning grid 50 kHz (FM); 9 kHz (MW)FMSensitivity- Mono, 26dB S/N Ratio- Stereo, 46dB S/N Ratio43 dBfSearch Selectivity 28 dBfTotal Harmonic Distortion 55dBTape deckFrequency response- Normal tape (type I) 125 - 8000 Hz (8 dB)Signal-to-noise ra

5、tio- Normal tape (type I) 40 dBAWow and ? utter 82dB/m/WAmplifierRated Output Power 2X5W RMSFrequency Response 60 - 16kHz, 3dBSignal to Noise Ratio 65dBAux Input 0.5 V RMS 20kohmDiscLaser Type SemiconductorDisc Diameter 12cm/8cmVideo Decoding MPEG-2/MPEG-1Video DAC 10 BitsSignal System PAL/NTSCVideo

6、 Format 4:3/16:9Video S/N 56 dB (minimum)Composite VideoOutput1.0 Vp-p, 75 ohmS-Video output Y- 1.0 Vp-p, 75 ohmC- 0.286 Vp-p, 75 ohmAudio DAC 24Bits / 96 kHzTotal HarmonicDistortion65dBA1 - 2TECHNICAL SPECIFICATIONSType /Versions:FeaturesBoard in used:MCD170Service policyFRONT BOARDMAIN BOARDDVD BO

7、ARDTAPE BOARD* TIPS : C - Component Lever Repair.M - Module Lever Repair- Used/05 /12 /5589/16/85/Feature diffrenceRDSVOLTAGE SELECTORECO STANDBY - DARKCCType /Versions:MCD170/05 /12 /5589/16/85/MVERSION VARIATIONCC39/39/MMMCCMM1-3LF Generator e.g. PM5110RecorderUse Universal Test Cassette CrO2 SBC4

8、19 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 Technology ST1700BLRDUTCDUse Audio Signal Disc(r

9、eplaces 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-measurements have to be carried out in a Faradays cage

10、.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 Technology ST1700BUse a bandpass filter to elimin

11、ate 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 reduce lifedrastically.When repairing, make sure

12、 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 that parts which are identical with those sp

13、ecified,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 playabilityreturn setCustomer complaint“CD related problem“f

14、ast“ 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 discsuse CD-RW Printed Audio Disc.7104 099 96611TR

15、 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 CD-DA SBC 444A.4822 397 30245TR 14 (600 Bla

16、ck 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 reasonable time2CUSTOMER INFORMATIONIt is proposed to

17、 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 contact the workshop directly. The lens cleanin

18、g (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 coatedwith a special anti-reflectivity layer, clean

19、ing 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 soft andclean cotton bud moistened with the

20、 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 - 2DISASSEMBLY DIAGRAM VIEW3 - 1 3 - 1SET BLOCK DIAGRAM4 - 1 4 - 1SET WIRING DIAGRAM4 - 2 4- 25 - 15 - 1CIRCUIT DIAGRAM - MAIN BOARDAMP PART