Philips-MME-140-Service-Manual电路原理图.pdf

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1、Version 1.0MME140/77/78 3141 785 30670Micro SystemPublished by YT 0546 Service Audio Printed in The Netherlands Subject to modification Copyright 2005 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrieval

2、system or transmitted, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.Handling Chip Components . 1-1Service Tools . 1-1Leadfree and Safety Information . 1-2Technical Specification . 2-1Service Measurement Setup . 2-2Alignment In

3、struction . 2-3Connections and Controls . 3-1.3-3IC Pins Description . 4-1.4-2Set Block Diagram . 5-1Set Wiring Diagram . 5-2Circuit DiagramCombi board (Tuner/Tape/AMP) . 6-1Combi board (CD/Display) . 6-2Layout DiagramCombi board (Top view) . 7-1Combi board (Bottom view) . 7-2Exploded View Diagram .

4、 8-1Accessories and Mechanical Partslist . 8-2Electrical Partslist . 9-1TABLE OF CONTENTS1 - 1HANDLING CHIP COMPONENTS1 - 22 - 1SPECIFICATIONS GENERAL: Mains voltage : 110-127/220-240V Switchable Mains frequency : 50/60 Hz Power consumption : 45 dB IF rejection : 50 dB Image rejection : 20 dB Distor

5、tion : 22 dB MWTuning range : 530 1700 kHz Grid : 10 kHz IF Frequency : 455 kHz 1kHz Aerial input : Inner frame antenna Sensitivity at 26sb S/N : 18 dB IF rejection : 45 dB Image rejection : 28 dB Distortion : 35 dB with type 1 tape COMPACT DISC: Number of programming track : 20 Frequency response W

6、ithin 1.5 dB : 63 Hz 16 kHz Signal/Noise ratio : 50 dB/A-weighted Distortion at 1 kHz : 25 dB 2 - 2SERVICE MEASUREMENTBandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BTuner FWUse a bandpass filter to eliminat

7、e hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).Ri=50Bandpass250Hz-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

8、 be carried out in a Faradays cage.Use a bandpass filter (or at least a high pass filter with 250kHz) to eliminate hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50LRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTCD RECORDERUse Audio Signal Disc

9、SBC429 4822 397 30184(replaces test disc 3)Use Universal Test Cassette Fe SBC420 4822 397 30071LRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BDUTLF Generator e.g. PM5110Ri=502 - 2AM I.F. ALIGNMENT1. Set the FUNCTION SWITCH to RADIO2. Set the BAN

10、D SELECTOR switch to AM .3. Connect a SWEEPSCOPE OUTPUT to AM ant Terminal.4. Connect a SWEEPSCOPE INPUT to pin18 of IC4 TA2111N through a 1uF capacitor and ground.STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR1 455KHz GANG OPEN IF1 (AM IF) CENTRE& MAXIMUM OUTPUTAM R.F. ALIGNMENT1. Connect an RF generat

11、or to a standard radiating loop.2. Connect a SCOPE VTVM across the speaker output.STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR1 520KHz GANG CLOSED IF3 (AM OSC COIL)2 1720KHz GANG OPEN PV1-D (AM OSC TRIM.) MAXIMUM3 600KHz 600KHz L6 (AM ANT COIL) OUTPUT4 1400KHz 1400KHz PV1-C (AM ANT TRIM.)5 REPEAT STEP

12、S 3 AND 4 TO OBTAIN BEST TRACKING.FM I.F. ALIGNMENT1. Set the FUNCTION SWITCH to RADIO2. Set the BAND SELECTOR to FM position.3. Connect a SWEEPSCOPE OUTPUT to pin 21 of IC4 TA2111N through a 20pF capacitor and ground.4. Connect a SWEEPSCOPE INPUT to pin18 of IC4 TA2111N through a 1uF capacitor and

13、ground.STEP SET SIGNAL SET DIAL ADJUST ADJUST FORBALANCED CURVE1 10.7MHz GANG OPEN Check WITH 10.7MHz ATZERO CROSSOVERFM R.F. ALIGNMENT1. Connect an RF generator to the FM antenna terminal and ground.2. Connect a SCOPE & VTVM across the speaker output.STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR1 87MH

14、z GANG CLOSED L3 (FM OSC COIL)2 108.5.MHz GANG OPEN PV1-A (FM OSC TRIM.) MAXIMUM3 90MHz 90MHz L4 (FM RF COIL) OUTPUT4 106MHz 106MHz PV1-B (FM RF TRIM.)5 REPEAT STEPS 3 AND 4 TO OBTAIN MAXIMUM OUTPUT.CASSETTE ALIGNMENT1. Set the FUNCTION SELECTOR switch to TAPE.2. Connect a Scope & VTVM across the sp

15、eaker output.3. Insert the 8KHz tape in to cassette deck and push play buttom.4. Adjusting HEAD for speaker maximum output.ALIGNMENT INSTRUCTIONxx3 - 1CONNECTION AND CONTROLS83 - 2CONNECTION AND CONTROLS#ONTROLSILLUSTRATIONSONPAGE #ONTROLSONTHESYSTEM4OPANDFRONTPANELS 4ELESCOPICANTENNAn IMPROVES&-REC

16、EPTION /0%.#,/3%n LIFTSHERETOOPENTHE#$DOOR 45.).n TUNESTORADIOSTATIONS 02/2%0%!4nPROGRAMSTRACKSANDREVIEWSTHEPROGRAM 2%0%!4nREPEATSATRACK DISCORAPROGRAM 6/,5-%ROTARYnADJUSTSTHEVOLUME $“$YNAMIC“ASS“OOST nTURNSTHEBASSENHANCEMENTONOFF4APEDECK 0/7%2n SWITCHESTHESYSTEMONOROFF$)30,!9n #$ ONLYDISPLAYSDISCIN

17、FORMATION &REQUENCYINDICATORn SHOWSTHERADIOFREQUENCYOFYOURSELECTEDWAVEBAND 0OWERINDICATORn LIGHTSUPWHENTHESYSTEMISPOWEREDON02/INDICATORn FLASHESWHENPROGRAMISACTIVE2%0%!4INDICATORn FLASHESLIGHTSUPWHENREPEATMODEISACTIVE&-34INDICATORn LIGHTSUPWHENSTEREO&-SIGNALISRECEIVED 0,!90!53%n STARTSORPAUSES#$PLAY

18、BACK34/0STOPSPLAYBACKERASEAPROGRAMn SKIPSORSEARCHESTRACKSPASSAGEBACKWARDFORWARD 3OURCESELECTOR#$ 45.%2 4!0%n SELECTS#$ RADIOORTAPE nn MMHEADPHONESOCKET(ELPFULHINTSn !DJUSTTHEVOLUMETOAMODERATELEVELBEFOREYOUPLUGINTHEHEADPHONESn #ONNECTINGHEADPHONESWILLSWITCHOFFTHESPEAKERS8 “ANDSELECTORn SELECTSWAVEBAN

19、DS !- &-OR&-34 4APEDECKKEYS2%#/2$ STARTSRECORDING0,!9 STARTSPLAYBACK2%7&7$FASTREWINDSWINDSATAPE34/0%*%#4STOPSPLAYBACKORRECORDINGOPENSTHETAPEHOLDER0!53% INTERRUPTSPLAYBACKORRECORDINGxx#ONNECTINGTHESPEAKERS5SETHESUPPLIEDSPEAKERSONLY5SINGOTHERSPEAKERSCANDAMAGETHESETORTHESOUNDQUALITYWILLBENEGATIVELYAFFE

20、CTED#ONNECTTHEWIRESOFTHELEFTSPEAKERTO,REDANDBLACK ANDTHEWIRESOFTHERIGHTSPEAKERTO2REDANDBLACK ASFOLLOWS/PENTHECLIPOFTHEREDTERMINALANDFULLYINSERTTHESTRIPPEDPORTIONOFTHECOLOUREDORMARKED SPEAKERWIRESINTOTHESOCKET THENCLOSETHECLIP/PENTHECLIPOFTHEBLACKTERMINALANDFULLYINSERTTHESTRIPPEDPORTIONOFTHEBLACKORUN

21、MARKED SPEAKERWIRESINTOTHESOCKET THENCLOSETHECLIP7ARNING.EVERMAKEORCHANGECONNECTIONSWITHTHEMAINSSUPPLYSWITCHEDON3PEAKERS!TTACHINGTHESUPPLIEDSPEAKERS!SSHOWNBELOW ALIGNTHETABSBETWEENTHESPEAKERANDTHEMAINUNIT THENSLIDETHESPEAKERSDOWNWARDSUNTILITLOCKSINTOPLACE2EPEATTHESAMESTEPSTOATTACHTHEOTHERSPEAKER4OTA

22、KEOFFTHESPEAKERS KEEPTHELEVERFOUNDONTHEBACKOFTHESPEAKER PRESSEDAS2%,%!3%SHOWNANDSLIDETHESPEAKERUPWARDS)NSTALLATION110V 220V!#POWERCORD6X5-ORh#vSIZE30%!+%24!“3 -!).5.)44!“3 30%!+%22%,%!3%3 - 2CONNECTION AND CONTROLS4 - 1IC PINS DESCRIPTIONLEDoutputLCDoutputP7-2/INTR/SO2 RemoconP7-0/SCK2/TX2 DisplaySe

23、lectPUSelect1P1-0/SCK1/TX1/Ctin/DATA SCKMVDDPP6-1/S14/ADin2/IPFP5-2/S11/LRCKP5-1/S10/BCK6-2/S15/ADin3/SBOK KEYAD3P5-3/S12/AOUT DoorP7-1/SDIO2/RX2 CDRW SelectP1-1/SDIO1/RX1/SFSY PUSelect0PUSelect2MVSSP6-3/S16/ADin4/CLCKKEYAD2P6-0/S13/ADin1/DOUT DOUTSyncrecFOORFGCSELDMOXOCVSSDVSSTROFMOTEBCCVDDXIDVDDRO

24、LODVRTC94A29F/FAG-008(SVFP64pin)MCU Oscillator MCU Power supplyTEITEZISBAD FEIRFRPVREFRFZI AVDDRFI SLCOAVSSVCOF LPFOTMAXPDOTESLPFNX-BassP8-0/MXI/OSC/RESETHOLD8-1/MXOP2-0/COM1P2-1/COM2P2-3/COM4P2-2/COM3TEST/P3-0/S1P3-1/S2P3-2/S3P3-3/S4P4-0/S5P4-1/S6P4-3/S8P5-0/S9P4-2/S71720242832333640444849 52 56 60 641481216P1-3/BUZRP1-2/SO1/SBSY