JVC-RCEX30B-cs-sch 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, LimitedNo.MB2792004/6CD PORTABLE SYSTEMMB27920046RC-EX30BTABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SE

2、RVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54ADJUSTMENT .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-145TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15PUSH

4、PLAY/PAUSESTOPPROGRAM/CLOCK SETHBS/PRESET EQPRESETUPPRESETDOWNDISPLAYTAPECDBANDRANDOMTUNERGROUPREMOTESENSORTAPEFM MODE/BEAT CUTPROGRAM/CLOCK SETUPDOWNINTROHBS/PRESET EQREPEATSTANDBY/ONDISPLAYMUTINGPRESETVOLUMERM-SRCEX30J REMOTE CONTROL1234567890OVERCD/RANDOMTUNER/BANDGROUP+Area suffixA - AustraliaB

5、- U.K.E - Continental EuropeEN - Northern EuropeEV - Eastern EuropeSERVICE POLICYNo service part is available for this model.Exchange only.RadioFans.CN 收音机爱 好者资料库1-2 (No.MB279)SPECIFICATIONDesign and specifications are subject to change without notice.CD playerCD capacity1 CDSignal-to-noise ratio75

6、dBDynamic range60 dBTunerFrequency rangeFM 87.5 - 108.0 MHzAM 522 - 1 629 kHzAntennasTelescopic antenna for FMFerrite core antenna for AMCassette deckFrequency response60 Hz - 10 000 HzWow & flutter0.15% (WRMS)Fast wind timeApprox. 150 sec. (C-60 cassette)GeneralSpeakers9 cm cone 2Speaker impedance4

7、 Output power4 W (2 W + 2 W) at 4 (10% THD)Output terminalsPHONES 1Power supplyAC 230 V , 50 Hz DC 9 V (R20 (SUM-1)/D (13D)-size batteries 6)Power consumption18 W (at operation) 3 W (on standby)Dimensions420 mm 178 mm 250 mm (W/H/D)MassApprox. 3.2 kg (without batteries)RadioFans.CN 收音机爱 好者资料库(No.MB2

8、79)1-3SECTION 1PRECAUTIONThis service manual does not describe PRECAUTION.1-4 (No.MB279)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB279)1-5SECTION 3DISASSEMBLY3.1Main body3.1.1Removing the rear cover assembly section (See Fig.1 to 3

9、)(1) Remove the eight screws A, the three screws B and thefour screws C attaching the rear cover assembly on theback of the body.(2) Remove the battery cover on the back of the body and re-move the two screws D attaching the rear cover assembly.(3) Move the rear cover assembly in the direction of th

10、e arrowand remove. At this time, disconnect the wire from connec-tor CN406 and FM-ANT on the main board.Fig.1Fig.2Fig.3CBCADAADBattery coverFM-ANTTop cover assemblyRear cover assemblyTuner boardCN406Front panel assemblyMain board 1-6 (No.MB279)3.1.2Removing the top cover assembly section and the fro

11、nt panel assembly section (See Fig.4 to 8) Prior to performing the following procedure, remove the rearcover assembly.(1) Release the tab a of the handle using a screwdriver. Returnthe handle below and pull out in the direction of the arrow.(2) Disconnect the wire from connector CN404 and 4pin con-n

12、ector on the main board.(3) Remove the six screws E and the two screws F attachingthe top cover.(4) Draw out the top cover assembly from the front panel as-sembly section backward.(5) Disconnect the wire from connector CN501 and CN506 onthe main board, and disconnect the card wire from connec-tor CN

13、507 and CN508.(6) Disconnect the wire from board connector CON301 of thecassette mechanism assembly.Fig.4Fig.5Fig.6Fig.7Fig.8tab atab aHandleCN404Main board4pin connectorFront panel assemblyTop cover assemblyETop cover assemblyEEECD doorFMain boardCN501,CN506Main boardCN508,CN507Cassette mechanism b

14、oard CON301(No.MB279)1-73.1.3Removing the main body (See Fig.9, 10)Caution:Make sure to solder the short-circuit point on the CD servoboard before disconnecting the card wire from connectorCN201 on the main board and from the CD servo board. If youdont observe this instruction, the pickup may be dam

15、aged.(1) Remove the eight screws G attaching the main board onthe top cover assembly.(2) Disconnect the wire from connector CN501, CN502,CN511, CN202, CN401 and CN504 on the main board.(3) Disconnect the card wire from connector CN201 on themain board.Caution:If necessary, cut the band.Fig.9Fig.10CN

16、504CN501CN202CN201CN502GGGGGCN511BandCN401UnsolderShort-circuit pointCD servo board1-8 (No.MB279)3.1.4Tuner board (See Fig.11) Prior to performing the following procedure, remove the mainboard.(1) Remove the three screws H attaching the tuner board.Fig.113.1.5Removing the top switch board (See Fig.1

17、2) Prior to performing the following procedure, remove the mainboard and the tuner board.(1) Remove the four screws J attaching the top switch board.Fig.12HHTuner boardJJTop switch board(No.MB279)1-93.1.6Removing the volume board and the power switch board (See Fig.13 to 16) Prior to performing the

18、following procedure, remove the mainboard.(1) Remove the three screws K attaching the volume board.(2) Pull out the volume board from the volume knob.(3) Remove the four screws L attaching the cover on the sideof the power switch.(4) Release the three tabs b of the cover on the side of thepower swit

19、ch.(5) Remove the three screws M attaching the power switchboard to the cover.Caution:If necessary, unsolder the solder points.Fig.13Fig.14Fig.15Fig.16KKVolume boardSolder pointTop cover assemblyVolume boardKKVolume knobSwitch boardSolder pointSide top coverSwitch boardTab bLMMSide top coverPower sw

20、itch boardSolder point1-10 (No.MB279)3.1.7Removing the CD mechanism assembly (See Fig.17) Prior to performing the following procedure, remove the mainboard.(1) Remove the four screws N attaching the CD mechanismassembly.Fig.17NNCD mechanismassemblyTop cover assembly(No.MB279)1-113.1.8Removing the ca

21、ssette mechanism assembly (See Fig.18 21)(1) Remove the four screws P attaching the cassette mecha-nism cover.(2) Remove the four screws Q attaching the cassette mecha-nism assembly.(3) Push Eject button to open the cassette door.(4) Pull out the cassette mechanism assembly in the directionof arrow.

22、(5) Remove the six screws R attaching the operation board.Fig.18Fig.19Fig.20Fig.21Cassette mechanism coverPPCassette mechanism assemblyQQCassette doorEJECT buttonCassette mechanism assemblyRButton1-12 (No.MB279)3.1.9Removing the LCD & switch board (See Fig.22) Prior to performing the following proce

23、dure, remove the cas-sette mechanism assembly.(1) Remove the eight screws S attaching the LCD & switchboard.Fig.223.1.10 Removing the speaker (SeeFig.23)(1) Remove the six screws T attaching the speaker bracket.(2) Peel the tape and glue off attaching the speaker cord.Caution:The band comes off when

24、 you remove the speaker.Fig.23LCD & switch boardSSSpeakerSpeakerSpeaker bracketBandTapeTapeGlueTT(No.MB279)1-133.1.11 Removing the power transformer and the battery board (See Fig.24, 25)(1) Remove the two screws U attaching the power transform-er.(2) Remove the two screws V attaching the power sock

25、et.(3) Remove the support board attaching the battery board.(4) Release the tab d setting the battery board and pull out thebattery board.(5) If necessary, unsolder the solder points.Caution:When you remove the power transformer, the band setting thecord to the screw hole comes off.Fig.24Fig.25UBatt

26、ery boardVSupport boardTapeTab dBattery boardSolder point1-14 (No.MB279)SECTION 4ADJUSTMENTThis service manual does not describe ADJUSTMENT.(No.MB279)1-15SECTION 5TROUBLESHOOTING5.1Block diagramSPEAKERPHONETUNERTA2149POWER AMPTA8227PLLTC9257SOURCESELECTORTC9422LCDMCU4K76KEY BOARDREMOTESENSORFLASHROM

27、MX29F040DRAMHY51181ESS 3890D/AP18211REMOTECONTROLCD SERVOTA2092CDPICKUPCD RF AMPTA2153DSPTC9462HCF4052TAPEAN7312POWERSUPPLYDC SUPPLYBATT 6x1.5VAC IN1-16 (No.MB279)5.2Standard schematic diagrams5.2.1Amp section(No.MB279)1-171-18 (No.MB279)5.2.2Micon section(No.MB279)1-191-20 (No.MB279)5.2.3CD section

28、(No.MB279)1-211-22 (No.MB279)5.2.4MP3 section(No.MB279)1-231-24 (No.MB279)5.2.5Cassette section(No.MB279)1-251-26 (No.MB279)5.2.6Tuner section(No.MB279)1-27(No.MB279)AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,JapanVictor Company of Japan, LimitedWPCPrinted in Japan