Philips-MC-146-Service-Manual电路原理图.pdf

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1、 MC146/05/12/96Copyright 2007 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

2、 permission of Philips.Published by SL 0738 Service Audio Printed in The Netherlands Subject to modificationMicro SystemVersion 1.0CLASS 1LASER PRODUCT 3141 785 31800TABLE OF CONTENTSPageLocation of PCBs .1-2Specifi cations .1-3Measurement Setup .1-4Service Aids, Safety Instruction, etc .1-5CD Playa

3、bility Check .1-6 to 1-8Software Version Checking . 2Set Block Diagram . 3Set Wiring Diagram . 4Main Board . 5Front Board. 6Set Mechanical Exploded View & Parts List . 7Electrical Parts List . 8PCBS LOCATIONFRONT BOARDMAIN BOARD1-21-3AMPLIFIEROutput power . 2 x 2W RMSSignal-to-noise ratio. t 60 dBA

4、(IEC)Frequency response . 125 16000 HzImpedance loudspeakers . 8:CD PLAYERFrequency range . 125 16000 HzSignal-to-noise ratio. 65 dBATUNERFM wave range . 87.5 108 MHzMW wave range . 531 1602 kHzSensitivity FM 26 dB sensitivity . 20 V MW 26 dB sensitivity . 5 mV/mTotal harmonic distortion. d 5%SPEAKE

5、RSBass reflex systemDimensions (w x h x d) . 134 x 230 x 152 (mm)GENERAL INFORMATIONAC Power . 220 230 V / 50 HzDimensions (w x h x d) . 148 x 233 x 216 (mm)Weight (with/without speakers) . approx. 3.65 / 1.53 kgPower consumptionActive . 15 WStandby . 250mV-Laser damaged !4,6V3V3,3V3,9V2V0,17V0,17VS

6、anyoDA12T3HF-AmplifierD3D2D1Drive detection680R390539033K3BC847B787747n28181K53902574216364891011470R3893+3.3V2K23908 10K3923BC847B7878BC847B78764n728133896100R220u28852881560p47n2887560R39012883470n28174u73n328143898220R389527K470n2884+3.3V3909820R3907100R392033K3897288282p3K339042K738993906470R+5V

7、_HFHFINVrefCD10100p2815281622nLDONto 3826,3827VREF GEVDDA1VRINVSSA1ISLICELDOND1D2D3D4HFINHFREFIREFCD_DA: 0V / CD_RW: 3V (A-D)800mVppTB = 0.5s/divEYE-PATTERN1,8V1,2V2,4V2,6V0,65VINSTRUCTIONS ON CD PLAYABILITY1-82-1 2-1To hold REPEAT &PRESET+ depressed Display shows theROM version “U - XX“U refers to VersionXX refers to Software version number of the uProcessor(counting up from 01 to 99)SOFTWARE VERSION CHECKINGSet on Standby.YNYNButton pressed?9Button pressed?DISPLAYTESTDisplay shows all patterns PRESET-Display shows “NEW“SOFTWARERESET3-1 3-1SET BLOCK DIAGRAM