JVC-RCEX30B-cs-sch维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 Victor Company of Japan, Limited No.MB279 2004/6 CD PORTABLE SYSTEM MB27920046 RC-EX30B TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SP

2、ECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 4A

3、DJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . 1-15 PUSH PLAY/PAUSE STOP PROGRAM/ CLOCK SET HBS/ PRESET EQ PRESET UP PRESET DOWN DISPLAY TAPE CD BAND RANDOM TUNER GROUP REMOTE SENSOR TAPE FM MODE /BEAT CUT PROGRAM/ CLOCK SET UP DOWN INTRO HBS/ PRESET EQ REPEAT STANDBY/ON DISPLAY MUTING PRESET VOLUME RM-SRCEX30J REMOTE CONTROL 123 456 789 0 O

5、VER CD/ RANDOM TUNER/ BAND GROUP + Area suffix A - Australia B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe SERVICE POLICY No service part is available for this model. Exchange only. RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB279) SPECIFICATION Design and specifications are subject

6、to change without notice. CD playerCD capacity1 CD Signal-to-noise ratio75 dB Dynamic range60 dB TunerFrequency rangeFM 87.5 - 108.0 MHz AM 522 - 1 629 kHz AntennasTelescopic antenna for FM Ferrite core antenna for AM Cassette deckFrequency response60 Hz - 10 000 Hz Wow & flutter0.15% (WRMS) Fast wi

7、nd timeApprox. 150 sec. (C-60 cassette) GeneralSpeakers9 cm cone 2 Speaker impedance4 Output power4 W (2 W + 2 W) at 4 (10% THD) Output terminalsPHONES 1 Power 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

8、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.MB279)1-3 SECTION 1 PRECAUTION This service manual does not describe PRECAUTION. 1-4 (No.MB279) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB

9、279)1-5 SECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the rear cover assembly section (See Fig.1 to 3) (1) Remove the eight screws A, the three screws B and the four screws C attaching the rear cover assembly on the back of the body. (2) Remove the battery cover on the back of the body and re- mo

10、ve the two screws D attaching the rear cover assembly. (3) Move the rear cover assembly in the direction of the arrow and remove. At this time, disconnect the wire from connec- tor CN406 and FM-ANT on the main board. Fig.1 Fig.2 Fig.3 C B C A D A A D Battery cover FM-ANT Top cover assembly Rear cove

11、r assembly Tuner board CN406 Front panel assembly Main board 1-6 (No.MB279) 3.1.2Removing the top cover assembly section and the front panel assembly section (See Fig.4 to 8) Prior to performing the following procedure, remove the rear cover assembly. (1) Release the tab a of the handle using a scre

12、wdriver. Return the handle below and pull out in the direction of the arrow. (2) Disconnect the wire from connector CN404 and 4pin con- nector on the main board. (3) Remove the six screws E and the two screws F attaching the top cover. (4) Draw out the top cover assembly from the front panel as- sem

13、bly section backward. (5) Disconnect the wire from connector CN501 and CN506 on the main board, and disconnect the card wire from connec- tor CN507 and CN508. (6) Disconnect the wire from board connector CON301 of the cassette mechanism assembly. Fig.4 Fig.5 Fig.6 Fig.7 Fig.8 tab a tab a Handle CN40

14、4 Main board 4pin connector Front panel assembly Top cover assembly E Top cover assembly E EE CD door F Main board CN501,CN506 Main board CN508,CN507 Cassette mechanism board CON301 (No.MB279)1-7 3.1.3Removing the main body (See Fig.9, 10) Caution: Make sure to solder the short-circuit point on the

15、CD servo board before disconnecting the card wire from connector CN201 on the main board and from the CD servo board. If you dont observe this instruction, the pickup may be damaged. (1) Remove the eight screws G attaching the main board on the top cover assembly. (2) Disconnect the wire from connec

16、tor CN501, CN502, CN511, CN202, CN401 and CN504 on the main board. (3) Disconnect the card wire from connector CN201 on the main board. Caution: If necessary, cut the band. Fig.9 Fig.10 CN504 CN501 CN202 CN201 CN502 GG GGG CN511 Band CN401 Unsolder Short-circuit point CD servo board 1-8 (No.MB279) 3

17、.1.4Tuner board (See Fig.11) Prior to performing the following procedure, remove the main board. (1) Remove the three screws H attaching the tuner board. Fig.11 3.1.5Removing the top switch board (See Fig.12) Prior to performing the following procedure, remove the main board and the tuner board. (1)

18、 Remove the four screws J attaching the top switch board. Fig.12 H H Tuner board J J Top switch board (No.MB279)1-9 3.1.6Removing the volume board and the power switch board (See Fig.13 to 16) Prior to performing the following procedure, remove the main board. (1) Remove the three screws K attaching

19、 the volume board. (2) Pull out the volume board from the volume knob. (3) Remove the four screws L attaching the cover on the side of the power switch. (4) Release the three tabs b of the cover on the side of the power switch. (5) Remove the three screws M attaching the power switch board to the co

20、ver. Caution: If necessary, unsolder the solder points. Fig.13 Fig.14 Fig.15 Fig.16 K K Volume board Solder point Top cover assembly Volume board K K Volume knob Switch board Solder point Side top cover Switch board Tab b L M M Side top cover Power switch board Solder point 1-10 (No.MB279) 3.1.7Remo

21、ving the CD mechanism assembly (See Fig.17) Prior to performing the following procedure, remove the main board. (1) Remove the four screws N attaching the CD mechanism assembly. Fig.17 N N CD mechanism assembly Top cover assembly (No.MB279)1-11 3.1.8Removing the cassette mechanism assembly (See Fig.

22、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 direction of arrow. (5) Remove the six screws R

23、 attaching the operation board. Fig.18 Fig.19 Fig.20 Fig.21 Cassette mechanism cover PP Cassette mechanism assembly QQ Cassette door EJECT button Cassette mechanism assembly R Button 1-12 (No.MB279) 3.1.9Removing the LCD & switch board (See Fig.22) Prior to performing the following procedure, remove

24、 the cas- sette mechanism assembly. (1) Remove the eight screws S attaching the LCD & switch board. Fig.22 3.1.10 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 yo

25、u remove the speaker. Fig.23 LCD & switch board SS SpeakerSpeaker Speaker bracket Band Tape Tape Glue T T (No.MB279)1-13 3.1.11 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 t

26、he power socket. (3) Remove the support board attaching the battery board. (4) Release the tab d setting the battery board and pull out the battery board. (5) If necessary, unsolder the solder points. Caution: When you remove the power transformer, the band setting the cord to the screw hole comes o

27、ff. Fig.24 Fig.25 U Battery board V Support board Tape Tab d Battery board Solder point 1-14 (No.MB279) SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. (No.MB279)1-15 SECTION 5 TROUBLESHOOTING 5.1Block diagram SPEAKER PHONE TUNER TA2149 POWER AMP TA8227 PLL TC9257 SOURCE SELEC

28、TOR TC9422 LCD MCU 4K76 KEY BOARD REMOTE SENSOR FLASH ROM MX29F040 DRAM HY51181 ESS 3890 D/A P18211 REMOTE CONTROL CD SERVO TA2092 CD PICKUP CD RF AMP TA2153 DSP TC9462 HCF4052 TAPE AN7312 POWER SUPPLY DC SUPPLY BATT 6x1.5V AC IN 1-16 (No.MB279) 5.2Standard schematic diagrams 5.2.1Amp section (No.MB

29、279)1-17 1-18 (No.MB279) 5.2.2Micon section (No.MB279)1-19 1-20 (No.MB279) 5.2.3CD section (No.MB279)1-21 1-22 (No.MB279) 5.2.4MP3 section (No.MB279)1-23 1-24 (No.MB279) 5.2.5Cassette section (No.MB279)1-25 1-26 (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,Japan Victor Company of Japan, Limited WPC Printed in Japan