Kenwood-RXDA75-cs-sm 维修电路原理图.pdf

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1、(XD-A55/A75)70%MINI HiFi COMPONENT SYSTEMRXD-A55/A75SERVICE MANUAL 2001-4/B51-5713-00 (K/K) 1382 Panel assy (A60-2091-08)Knob(VOLUME) (K27-2470-08)Dress ring(A21-3957-08)In compliance with Federal Regulations, following are repro-duction of labels on, or inside the porduct relating to laser prod-uct

2、 safety.KENWOOD-Crop. certifies this equipment conforms to DHHSRegulations No.21 CFR 1040. 10, Chapter 1, subchapter J.DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.* Refer to parts list on page 33. Panel(CD) (A60-2090-08)Front glass *(B10-)RadioFans.CN 收音机

3、爱 好者资料库RXD-A55/A752CONTENTS / ACCESSORIESCONTENTS / ACCESSORIES . 2EXTERNAL VIEW.3DISASSEMBLY FOR REPAIR.4BLOCK DIAGRAM .9CIRCUIT DESCRIPTION.11ADJUSTMENT.14PC BOARD . 16SCHEMATIC DIAGRAM . 23EXPLODED VIEW .31PARTS LIST.33SPECIFICATIONS .37ContentsFM Antenna (1)(T90-0883-08)AM Loop Antenna (1)(T90-0

4、879-08)Remote Control (1)(A70-1531-08)AA size battery (UM/SUM-3, R6, HP-7 or similar)(2)AccessoriesSYSTEM CONFIGURATIONCautionsSYSTEMMAIN UNITDESTINATIONSPEAKERXD-A55RXD-A55KPLS-N50SXD-A75RXD-A75KPLS-N70SCLASS 1LASER PRODUCTThe marking this product has beenclassified as Class 1. It means that therei

5、s no danger of hazardous radiatioutside the product.RadioFans.CN 收音机爱 好者资料库RXD-A55/A753EXTERNAL VIEWANTENNAFM75AM LOOPRSPEAKERS+-RL-VIDEO/AUXLPin jack (E63-1219-08)Pin assy(E40-8933-08)Cabinet(TOP) (A02-3014-08)Lock terminal board(E70-0144-08)AC power cord bushing (J42-0351-08)AC power cord (E30-722

6、2-08)FM Antenna(E70-0145-08)Caution on DisassemblyFollow the below-mentioned notes when disassemblingthe unit and reassembling it, to keep it safe and ensureexcellent performance:1. Take cassette tape and compact disc out of the unit.2. Be sure to remove the power supply plug from the walloutlet bef

7、ore starting to disassemble the unit.3. Take off nylon bands or wire holders where they need beremoved when disassembling the unit. After servicingthe unit, be sure to rearrange the leads where they werebefore disassembling.4. Take suffcient care on static electricity of integratedcircuits and other

8、 circuits when servicing.Figure 7-2Figure 7-31Top Cabinet1. Screw . (A1) x47-12Side Panel1. Screw . (B1) x87-1(Left/right)3CD Player Unit/1. Turn on the power supply,7-2CD Tray Cover open the disc tray, take out the CD cover, and close. (Note 1)2. Screw . (C1) x13. Hook. (C2) x34. Hook. (C3) x25. So

9、cket . (C4) x24Rear Panel1. Screw . (D1) x97-25Main PWB1. Screw . (E1) x17-22. Socket . (E2) x38-23. Flat Cable . (E3) x14. Tip Wire. (E4) x16Power Supply PWB1. Screw . (F1) x28-22. Socket . (F2) x13. Flat Wire. (F3) x18-37Front Panel1. Screw . (G1) x38-28Display PWB1. Screw .(H1) x98-32. Socket . (

10、H2) x19Tape Mechanism1. Open the cassette holder.8-32. Screw. (J1) x510Headphones PWB1. Screw . (K1) x18-311Turntable1. Hook. (L1) x28-42. Cover . (L2) x112Disc Tray1. Turn fully the lock lever in the7-3arrow direction.2.While holding the lock lever,rotate8-1the cam gear until the cam gearrib engage

11、s with the clamp lever.3. Push the slide holder backward to8-5engage the claw with the grooveand remove it in the directionof the arrow. .(M1) x613CD Servo PWB1. Screw . (N1) x18-6(Note 2)2. Hook. (N2) x23. Socket . (N3) x414CD Mechanism1. Hook. (P1) x29-12. Hook. (P2) x315Loading Motor PWB1. Hook.

12、(Q1) x59-1STEPREMOVALPROCEDUREFIGUREFigure 7-1(B1)x43x10mm(B1)x23x10mmRearPanel(B1)x23x10mmSide Panel(Right)Side Panel(Left)(A1)x23x12mm(A1)x23x12mmTop Cabinet(E1)x13x10mm(C3)x1(D1)x23x10mm(C1)x13x10mm(D1)x73x10mmCD PlayerUnitDC Tray CoverRearPanelPull(C3) x1(C4)x2(C2) x3112Main PWBCD ServoPWBNote 1

13、:How to open the changer manually. (Fig. 7-3)1. In this state, turn fully the lock lever in the arrow directionthrough the hole on the loading chassis bottom.2. While holding the lock lever, rotate the cam gear anticlockwiseuntil the cam gear rib engages with the clamp lever. (Fig. 8-1)3. After that

14、, push forward the CD slide holder.Note 2:1. After removing the connector for the optical pickup from theconnector, wrap the conductive aluminium foil around thefront end of the connector so as to protect the optical pickupfrom electrostatic damage.Note 3:1. Be careful not to break the claw of the C

15、D mechanism.2. When fining back the cam gear assembly, let it lock by frontmovement.LOCK LEVERRXD-A55/A754DISASSEMBLY FOR REPAIRRXD-A55/A755DISASSEMBLY FOR REPAIRFigure 8-1Figure 8-2Figure 8-3Figure 8-4Figure 8-5Figure 8-6CLAMP LEVERCAM GEAR RIB(F1)x13x6mm(G1)x33x10mm(F1)x13x10mm(F2)x1(E3)x1(E4)x1(E

16、2)x2Main PWB(E2)x1PowerSupplyPWBPowerSupplyPWB(H1)x93x10mm(H2)x1(J1)x53x10mm(K1)x13x10mm(F3)x1Display PWBHeadphonesPWBOpenCassetteHolderTapeMechanismTurntableDisc Tray(L2) x1CD Player Unit(L1) x2132(M1) x3(M1) x3(N3) x2(N2) x2(N3) x2CD ServoPWBCD PlayerBase(N1)x13x8mmRXD-A55/A756DISASSEMBLY FOR REPA

17、IRFigure 9-1(P2) x3(P1) x1(Q1) x5(P1) x1LoadingMotorPWBCDMechanismRXD-A55/A757DISASSEMBLY FOR REPAIRREMOVING AND REINSTALLING THE MAIN PARTSTAPE MECHANISM SECTIONPerform steps 1 to 7 and 9 of the disassembly method toremove the tape mechanism.How to remove the record/playback and eraseheads (TAPE 2)

18、 (See Fig. 10-1)1. When you remove the screw (A1) x 2 pcs., the recording/playback head and three-dimensional head of the erasinghead can be removesd.How to remove the playback head (TAPE 1)(See Fig. 10-2)1. When you remove the screw (B1) x 2 pcs., the playbackhead.How to remove the pinch roller (TA

19、PE 1/2)(See Fig. 10-3)1. Carefully push the inside claw to remove it. The pinch rollerpawl in the direction of the arrow , and remove the pinchroller (C1) upwards.Note:When installing the pinch roller, pay attention to the springmounting position.How to remove the belt (TAPE 1) (See Fig. 10-4)1. Rem

20、ove the main belt (D1) x 1 pc., from the motor side.2. Remove the FF/REW belt (D2) x 1 pc.How to remove the belt (TAPE 2) (See Fig. 10-4)1. Remove the main belt (E1) x 1 pc., from the motor side.2. Remove the FF/REW belt (E2) x 1 pc.How to remove the motor (See Fig. 10-5)1. Remove the screws (F1) x

21、2 pcs., to remove the motor.Figure 10-1Figure 10-2Figure 10-3Figure 10-4Figure 10-5TAPE2TAPE1Main Belt(D1)x1TAPE2Main Belt(E1)x1TAPE1Main BeltFF/REWBelt(E2)x1FF/REWBelt(D2)x1MotorMotor(A1)x22x9mmTAPE2Record/PlaybackHeadErase Head(B1)x22x9mmTAPE1PlaybackHeadPinch Roller(C1)x1STEP1STEP2(F1) x22.6x5mmM

22、otorRXD-A55/A758DISASSEMBLY FOR REPAIRHow to remove the pickup (See Fig. 11-2)1. Remove the stop washer (B1) x 1 pc., to remove the gear(B2).2. Remove the screws (B3) x 2 pcs., to remove the shaft (B4).3. Remove the pickup.Figure 11-2CD MECHANISM SECTIONPerform steps 1, 2, 3, 11 and 14 of the disass

23、embly methodto remove the CD mechanism.How to remove the loading motor(See Fig. 11-1)1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.Figure 11-1NoteAfter removing the connector for the optical pickup from theconnector wrap the conductive aluminium foil around the frontend of connector s

24、o as to protect the optical pickup fromelectrostatic damage.(A1)x2(A1)x1Loading MoterCD Base(A1)x2(B3) x2 2.6 x6mmShaft(B4) x1Stop Washer(B1) x1Gear(B2) x1CD MechanismPickupRXD-A55/A759BLOCK DIAGRAM345132T.F12381697232471821151412168412951713AM MIXAM IFGNDVCCFM DETVCOMO/STLRAM OSC INAM OSC OUTFM/AM

25、OUTAM RF INSTEREOMPXINFM/AM107921201MO/STFM/AM1115221617VDO3456OSC4.5MHzX352+B4CEDICLDO1329107161513121411RLRLRLRL173+B4FMOSCAM INFM INVTFM OSCFMFM+B214RL818AUXTAPECDTUNERLR23+B4RL242346916T1/T2REC1345718VCC1+5V+B3+B32314122120P.BH/N1781519NOR/ HIGHT1/T2+B4LRLR10L NFR NFALCREFR RECR NFL RECPOP REDUC

26、ER(T2)L NFR(T1)L(T2)L(T1)+B4+B4REC7418-B2+B45VH+VH-VL-VL+1418RL678,910,111-B1+B1L-OUTR-OUTSP.DET.12-1425-3615-244-111,238,39,50104-67-912215658595755544950484746434267-787980-8990-9293-10052535145444140383936372533-3134351116131217-20+B7+B7+B7+B7+B7VDDVLOADRESETVDO222324CECLDODIVDDAVDO+B6BIAST1/T2RE

27、C123+B7+B3+B6R-CHL-CH+B2-B2+B3M10V+B4A10VVF2+B463Hz307-B241810Hz1K2928-VFVF1+B6+5V+B5CD+BC801+B7T1/T2P.BPOWER AMP.IC901Q302CNP301AMFMBF301B.P.FFM FRONT ENDTA7358APIC301FM RFL312T301FM OSCT302FM IFCF303COVERAGETRACKINGAMAM BANDT303T306OSC BUFFCF352T351CF351IC302FM IF DET./FM MPX./AM IF LA1832SX351456

28、kHzZD351PLL(TUNER)LC72131IC303Q360CNS11FROM CD SECTIONCNP1LC75341IC601AUDIO PROCESSORJK601VIDEO INMIC101Q703Q704Q70554PINIC700IC70056PIN53PINIC70055PINIC700MOTORDRIVERTAPE MECHANISMASSEMBLYSOLM1,SOLM2SOLENOIDMM1MOTORTAPESWM2T2 PLAYR.PLAYSWM4SWM1T1 PLAYSWM3F.PLAYAN7345K/PLAYBACK AMP.PLAYBACK AND RECO

29、RDRchLchRchLchTAPE 1TAPE2PB HEADREC/PB HEADSWITCHINGQ103-106SWITCHINGQ107,108AC BIASQ111Q109Q126Q110SWITCHINGQ121,122MUTINGSWITCHINGERASEHEADL104Q128BIAS OSCSWITCHINGQ124BIASAM IFQ862,863IC860KIA4558POPE AMP.-2ODBATTSYSTEMMUTEQ603,604Q605,606Q864,865Q901-904FL701DISPLAYIC700(1/2)SYSTEMUPD 780206Q710

30、-712Q701-703MICROCOMPUTERQ700RESETXL7014.1943MHzP-INJOG701JOGRX701SENSORREMOCONKEYTO CDSECTIONJK670HEADPHONESMM901FAN MOTORQ907DRIVERQ905RL901SO901TERMINALSPEAKERD809T801TRANSFORMERF8045A/125VF8055A/125VD810D811-814Q803Q850F806CONSTANTVOLTAGE2A/125VKIA7810APREGULATORVOLTAGEQ851VOLTAGECONSTANTZD8512A

31、/125VF807KIA4558PMICROCOMPUTERIC700(2/2)OPEAMP.IC561,562SYSTEMUPD 780206ZD801REGULATORKIA7805PVOLTAGEQ852Q802Q801D804D8035A/125VF801D801CONSTANTREGULATORVOLTAGED802-805T802SUB POWERTRANSFORMERRY801AC POWERSUPPLY CORDAC 120V 60HzUNSWITCH 5VSWITCHINGMAIN POWERRXD-A75/A55RXD-A55/A7510BLOCK DIAGRAMFOCUS

32、 COILTRACKING COILFD0TD0SLDOSPDO20222126XOUTWRQDORESDICECONT5193728505675RFVDDVVDDVDDADAVDDFIN1RVDDLVDDXVDDFIN2LDSLDDTIN2TIN1CLKXIN234051555769494866656463616257281874641478010799842434544257071LCHOLVSSRCHORVSSCONT2CONT3CONT4+3.3V+3.3V45761823244082VCC1VCC2VCC4VCC3122517393842418-142229-351516272621

33、+5V123456AGNDR-CHDGNDL-CH+5V+5VDO465DICLK321CEWRQDRF897OC. DISC NOCLAMP SWCD RES456123162345146532+5VPICK UP UNITIC1LC78645ECONTROLSERVO/SIGNALXL133.8688MHzQ2CONSTANTVOLTAGEQ1LASERDRIVERIC2M63001FPDRIVERFOCUS/TRACKING/SPIN/SLEDMMM1MOTORSPINDLEMOTORSLEDM2PICKUP INQ3CNP7toSECTIONMAINSECTIONCNP8DISPLAY

34、toCNP4CNS4MSW1OPEN/CLOSESW2CLAMPDISCSW3NUMBERLOADINGRXD-A75/A55RXD-A55/A7511CIRCUIT DESCRIPTIONPort No.Port NameI/OFunction1VDD-POWER SUPPLY(+5V)2-20dB ATTO-20dB ATTENUATION3NO USE/DSA STB-GND4T BIASODECK BIAS CONTROL5T T1/T2ODECK T1/T2 CHANGE OVER6REC/PLAYODECK RECORDING/PLAYBACK CHANGE OVER7RES OU

35、TOCD DSP REQUEST8DRFICDRF LEVEL DETECTION9WRQICD DSP WRITE REQUEST10REQUESTIRESET SIGNAL INPUT11X2OMAIN CLOCK OUTPUT12X1IMAIN CLOCK INPUT13VPP/IC-GND14XT2-OPEN15SPN-OPEN16VDD-POWER SUPPLY(+5V)17CD CLKOCD DSP CLOCK 18CD DIOCD DSP COMMAND19CD DOICD DSP CODE Q INPUT20CD CEOCD DSP CE OUTPUT21CEOCHIP ENA

36、BLE OUTPUT22CLKOCLOCK OUTPUT23DIODATA OUTPUT24DOIDATA INPUT25AVSS-GND26O/C SW/DSA DATAICD OPEN CLOSE SWITCH INPUT27NO USE/DSA ACK/TUN SM-GND28SPEANA 2ISPEANA DATA INPUT(16kHz)29SPEANA 1ISPEANA DATA INPUT(1kHz)30SPEANA 0ISPEANA DATA INPUT(63kHz)3133KEY2KEY0IKEY INPUT34AVDD-ANALOG POWER SUPPLY35AVREF-

37、ANALOG REFERENCE VOLTAGE36P INIPOWER FAILURE DETECTION37,38JOG1,0IJOG VOLUME INPUT 1, 039REMOCONIREMOTE CONTROL SIGNAL INPUT40VSS-GND41SMUTEOSYSTEM MUTE CONTROL42T SOL BODECK2 SOLENOID CONTROL43T SOL AODECK1 SOLENOID CONTROL44T MOTORODECK MOTOR CONTROL45TIMER LEDOTIMER LED CONTROL46VDD-POWER SUPPLY(

38、+5V)47AC RLY CONT.OAC RELAY CONTROL48SP RLYOSPEAKER OUTPUT RELAY CONTROL49SP DETISPEAKER OUTPUT DETECTION50T1 RUNIDECK1 REEL SENSOR DETECTION PORT51T2 RUNIDECK2 REEL SENSOR DETECTION PORT52CD CLAMP SWICD CHANGER CLAMP SWITCH INPUT53PLAY SW AIDECK PLAY SWITCH A INPUT54PLAY SW BIDECK PLAY SWITCH B INP

39、UT55FPAIDECK FORWARD RECORDING SWITCH INPUT1. Port Description of MicroprocessorRXD-A55/A7512CIRCUIT DESCRIPTIONPort No.Port NameI/OFunction56FPBIDECK REVERSE RECORDING SWITCH INPUT57MIC IN-OPEN58MP3 LEDOMP3 LED CONTROL59DESTOUTODISCRIMINATION PORT FOR DESTINATION60STANDBY LEDOSTANDBY LED CONTROL61K

40、ARAOKE LATCH-OPEN6266NO USE-GND6770P22P19OFL DISPLAY CONTROL PORTDEST3DEST0IDESTINATION INPUT PORT7178P18P11OFL DISPLAY CONTROL PORT79VLOAD-FL DRIVER POWER SUPPLY(-30V)8089P10P1OFL DISPLAY SEGMENT CONTROL PORT90100G11G1OFL DISPLAY GRID CONTROL PORTPort No.Port NameI/OFunction1IN2-ICH2 inverted input

41、.2IN1A-ICH1 inverted input.3IN1B-OCH1 output offset control.4OUT1-OCH1inverted output.5OUT1+OCH1 non-inverted output.6OUT2-OCH2 inverted output.7OUT2+OCH2 non-inverted output.814GND-GND15OUT3+OCH3 non-inverted output.16OUT3-OCH3 inverted output.17IN3-ICH3 inverted input.18VCC1-Power supply 1 (CH1, C

42、H2, CH3).19STANDBYISTANDBY signal input.20VREF-CH1CH4 reference voltage input.21MUTEIMute signal input (CH6).22IN5-GND23IN5+-Connected to power supply.24VCC2-Power supply 2 (CH4).25IN4-ICH4 inverted input.26OUT4-OCH4 inverted output.27OUT4+OCH4 non-inverted output.28VCC3-Power supply 3 (CH5).2935GND

43、-GND36OUT5+OCH5 non-inverted output.37OUT5-OCH5 inverted output.38OUT6+OCH6 non-inverted output.39OUT6-OCH6 inverted output.40VCC4-Power supply 4 (CH6).41IN6-ICH6 inverted input.42IN6+ICH6 non-inverted input.2. Focus/Tracking/Spin/Sled Driver : M63001FP (CD Section IC2)RXD-A55/A7513CIRCUIT DESCRIPTI

44、ON1. Test Mode1-1 How to Set up the Test Mode During POWER OFF mode, push below each 2 keys and POWER key.Then go to each TEST MODE.1-2 Cancelling the Test Mode Turn the power off.1-3 Contents of the Test Mode1-3-1 CD Test ModeKEYSTEST MODE POWER SOUND + CD CD TEST MODE POWER SOUND + STOP ALL CLEAR

45、(RESET) POWER TUN DOWN + TUNER PRODUCTION INITIALIZE FOR CHANGER POWER REC + CDCD CHANGER TESTEnter the Test ModeOPEN/CLOSE operation is using manual, buttons make picks slide possible. key input key inputDo TOC IL. Do normal play Laser ON.When these following key is inputinto PLAY key, track number

46、 can key inputbe appoint directlyTracking OFF play at that specific point key inputRemote Controller Only key: Track 4Tracking ON play from that key: Track 9 specific point key: Track 15 key input key inputSTOPexplanation :a)Focus off set =FOFF_XX b)Tracking off set =TOFF_XX key inputc)Tracking bala

47、nce =TBAL_XXd)Tracking Gain =TGAN_XXSTOPf)Focus Gain =FGAN_XXg)RF level shift =RFLS_XXXX :Hex value Sliding the PICKUP with, button must only be in STOP mode.DSTETCAdjustment resultautomaticallywilldisplay as belowfor each 2 sec :a)FOFF_XXb)TOFF_XXc)TBAL_XXd)TGAN_XXf)FGAN_XXg)RFLS_XXAdjustment resul

48、t automatically willdisplay as below for each 2 sec : a)FOFF_XX b)TOFF_XX c)TBAL_XX d)TGAN_XX f)FGAN_XX g)RFLS_XXkey inputRXD-A55/A7514CIRCUIT DESCRIPTIONFunction:-Software RESET.-All the function condition will be initialize.-It will jump to A operation in case of power ON.-After display CLEAR ALL,

49、 power will off.-Forwarding condition set for CD changer.-Forwarding condition set for TAPE mecha.CLEAR_AL displayLEARLACFunction:The SET willbe set toshipping- All the function, condition are initialized. - CLEAR ALL TUNER PRESET MEMORY . - CLOCK INITIAL - CLEAR CD MEMORY - Initialize the CD change

50、r mecha and compact cassette mecha.- For CD changer mecha, set the CD mecha in upward condition.Display, key inputWAIT displayFINISHED displayWhen initialize the mechanism, it will display WAIT and will not accept any changes in inputAfter shipping condition setting is ended, FINISHED is displayed a