Philips-MCB-395-Service-Manual电路原理图.pdf

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1、 MCB395/05Copyright 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 SL 0820 Service Audio Printed in The Netherlands Subject to modificationDAB Micro SystemVersion 1.0CLASS 1LASER PRODUCT 3141 785 32850TABLE OF CONTENTSPagePCBs Location & Version Variations .1-2Specifi cations .1-3Measurement Setup .1-4Service Aids, Safety Instruction,

3、 etc .1-5 to 1-7Software Version Checking . 2Set Block Diagram . 3Set Wiring Diagram . 4Main Board & MCU Board . 5Key & LCD Board . 6Power Board . 7Power AMP Board . 8ECO Power Board . 9Headphone & AUX & USB Board . 10Set Mechanical Exploded View & Parts List . 11KEY & LCD BOARDECO POWER BOARDMAIN B

4、OARDPOWER BOARD POWER AMP BOARD/12 /58niRDC/nixuALine OutVideo OutSubwoofer OutDigital OutKaraoke FeaturesVoltage SelectorECO Power Standby (LCD Display Off)USB DirectType /Versions: MCB395 Featuresin used:/05VERSION VARIATIONSType /Versions:Board in used:MCB395Service policyMAIN BOARDPOWER BOARDPOW

5、ER AMP BOARDECO POWER BOARD* TIPS : C - Component Lever Repair.M - Module Lever Repair- UsedC/12 /05 855/9/16/85/Feature diffrenceKEY & LCD BOARDCCCDAB MODULE Mxxx1 - 2PCBS LOCATIONUSB & AUX & HP BOARD CCMCU BOARDMCU BOARD C1 - 3AMPLIFIEROutput power . 2 x 50 W RMS. 100 W + 100 W MPOSignal-to-noise

6、ratio. t 62 dBA (IEC)Frequency response . 40 15000 Hz, 3 dBImpedance loudspeakers . 4 :Impedance headphones . 32 : -1000 :CD/MP3-CD PLAYERNumber of programmable tracks . 20Frequency range . 20 20000 HzSignal-to-noise ratio. 75 dBAChannel separation .t 50 dBA (1 kHz)Total harmonic distortion.d 0.5%MP

7、EG 1 Layer 3 (MP3-CD) . MPEG AUDIOMP3-CD bit rate . 32-256 kbps(128 kbps advised)Sampling frequencies . 32, 44.1, 48 kHzUSB PLAYERUSB . 12Mb/s, V1.1Number of albums/folders . maximum 99Number of tracks/titles . maximum 999TUNERFM wave range . 87.5 108 MHzSensitivity at 75 : mono, 26 dB signal-to-noi

8、se ratio . 2.8 V stereo, 46 dB signal-to-noise ratio . 61.4 VTotal harmonic distortion. d 5%Frequency response . 63 12500 Hz ( 3 dB)Signal-to-noise-ratio . t 50 dBADAB wave range . 174-240 MHzSPEAKERS2-way Bass reflex systemGENERAL INFORMATIONAC Power .220 230 V / 50 HzStandby Power Consumption .d 7

9、WECO Standby Power Consumption .d 1WDimensions (w x h x d) Main unit (w x h x d) . 152 x 228 x 285 mm Speaker box (w x h x d) 152 x 228 x 257 mmWeight With Packing . 8.92 kg Main Unit . 3.66 kg Speaker box . 4.13 kgSpecifications and external appearance aresubject to change without notice.SPECIFICAT

10、IONS1 - 4LEVEL METERe.g. Sennheiser UPM550with FF-filterS/N 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 ST1700BFra

11、me 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 pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50Bandpass250Hz-15kHze.g. 7122 707 4

12、8001LF 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 the pilottone (19kHz, 38kHz).Ri=50Tuner FMMEASUREMENT SETUP1 - 5SERVICE AIDSGB WARNINGAll ICs and many other semi-condu

13、ctors aresusceptible to electrostatic discharges (ESD).Careless 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 1L

14、ASER 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 by the symbol!.Lead freeSet remains closed!NYPlay a CD for at least 10 minutesYplayabilityok ?Nplayabilityok ?add Inf

15、o for customer“SET OK“check playabilityNYplayabilityok ?check playabilitycheck playabilityreturn setCustomer complaint“CD related problem“fast“ lens cleaning123For flap loaders (= access to CD drive possible)cleaning method 4 is recommendedINSTRUCTIONS ON CD PLAYABILITY1 - 6Exchange CDM1 - 4 For des

16、cription - 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 at 01:00 playback of these two tracks without audible disturbanceplaying time for: Fingerprint 10secondsBlack dot fr

17、om 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 10 (1000 wedge) playback of all these tracks without audible disturbanceplaying time for: 1000 wedge 10secondsFinge

18、rprint 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 whichinforms the customer that the set has been checkedcarefully - but no fault was found.The problem was obviously caused by a

19、 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 theaddendum sheet.The final wording in national language as well as the printingis under responsibility of the Regional Servi

20、ce Organizations.4LIQUID LENS CLEANINGBecause the material 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 dam

21、aged in order to guarantee its full function.Clean the lens 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

22、 the lens by blowing clean air over it.This to avoid that little particles make scratches onthe lens.INSTRUCTIONS ON CD PLAYABILITY1 - 71) MCU version : at standby mode, press and hold “ALBUM -“ & “STOP“ buttons at the same time. e.g. V2.01GSoftware checking: SOFTWARE VERSION CHECKING2 - 1 2 - 1 SET BLOCK DIAGRAM3 - 13 - 1SET WIRING DIAGRAM4 - 14 - 1