Kenwood-RXD-755-Service-Manual电路原理图.pdf

70%MINI HiFi COMPONENT SYSTEMRXD-655/655-GR/655-H/655E/655E-GR©2001-6 PRINTED IN KOREAB51-5737-00 (K/K) 2308Panel ass'y *(A60-)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 product relating to laser prod-uct safety.KENWOOD-Crop. certifies this equipment conforms to DHHSRegulations No.21 CFR1040. 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-)RXD-655E-H/655L/655M/655M-HRXD-755/755E/755L/755MSERVICE MANUAL(XD-655855)*Refer to page 2 if you want to know system configuration.AM Loop Antenna(1)(T90-0879-08)“AA” size battery (UM/SUM-3,R6, HP-7 or similar)(2)Remote Control(1)(A70-1531-08): MXM3M5(A70-1537-08): ETE2FM Antenna(1)(T90-0883-08)Use to adapt the plug on thepower cord to the shape of thewall outlet.(Accessory only for regions whereuse is necessary.)AC Plug Adaptor (1)(E03-0115-05)RXD-655/7552CONTENTS / ACCESSORIESCONTENTS / ACCESSORIES.2EXTERNAL VIEW.3DISASSEMBLY FOR REPAIR.4BLOCK DIAGRAM.9CIRCUIT DESCRIPTION.10ADJUSTMENT.15PC BOARD.16SCHEMATIC DIAGRAM.23EXPLODED VIEW.31PARTS LIST.33SPECIFICATIONS.Back coverContentsAccessoriesCLASS1LASER PRODUCTThe marking this product has beenclassified as Class 1. It means that thereis no danger of hazardous radiatiooutside the product.SYSTEMMAIN UNITDESTINATIONSPEAKERXD-655RXD-655ETLS-N50SXD-655ERXD-655EE2 LS-N50SXD-655-GRRXD-655-GRET LS-N50S-GRXD-655E-GRRXD-655E-GRE2 LS-N50S-GRXD-655-HRXD-655-HELS-N50S-HXD-655E-HRXD-655E-HE2LS-N50S-HXD-655-HRXD-655M-HMLS-N50S-HXD-655RXD-655MMXLS-N50SXD-655(M3)RXD-655L(M3)M3LS-N50S(M3)XD-655(M5)RXD-655L(M5)M5LS-N50S(M3)XD-755RXD-755ETLS-N70SXD-755ERXD-755EE2 LS-N70SXD-755RXD-755MMXLS-N70SXD-755(M3)RXD-755L(M3)M3LS-N70S(M3)XD-755(M5)RXD-755L(M5)M5LS-N70S(M3)XD-855RXD-755ETLS-N90SXD-855ERXD-755EE2 LS-N90SXD-855RXD-755MMXLS-N90SXD-855(M3)RXD-755L(M3)M3LS-N90S(M3)XD-855(M5)RXD-755L(M5)M5LS-N90S(M3)SYSTEM CONFIGURATIONCAUTIONSRXD-655/7553EXTERNAL VIEWANTENNAAM LOOPFM75VIDEO/AUX+-LRRLSPEAKERSPin jack (E63-1219-08) Pin jack(AM)(E40-8933-08)Cabinet(TOP) (A02-3014-08)Lock terminal board(E70-0144-08)AC power cord bushing (J42-0338-08)AC power cord *(E30-)FM Antenna(E70-0145-08)*Refer to parts list on page 33 . RXD-655/7554DISASSEMBLY FOR REPAIRCaution 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 before 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 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 Coveropen the disc tray, take out the CD cover, and close. (Note 1)2.Screw.(C1)x13.Hook.(C2)x34.Hook.(C3)x25. Socket.(C4) x24RearPanel1.Screw.(D1)x97-25MainPWB1.Screw.(E1)x17-22. Socket.(E2) x38-23.FlatCable.(E3)x14.TipWire.(E4)x16Power Supply PWB1.Screw.(F1)x28-22. Socket.(F2) x13.FlatWire.(F3)x18-37FrontPanel1.Screw.(G1)x38-28Display PWB1. Screw.(H1) x98-32. Socket.(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 engages 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) x613CDServoPWB1.Screw.(N1)x18-6(Note 2)2.Hook.(N2)x23. Socket.(N3) x414CD Mechanism1.Hook.(P1)x29-12.Hook.(P2)x315Loading Motor PWB1.Hook.(Q1)x59-1STEPREMOVALPROCEDUREFIGUREFigure 7-1(B1)x4ø3x10mm(B1)x2ø3x10mmRearPanel(B1)x2ø3x10mmSide Panel(Right)Side Panel(Left)(A1)x2ø3x12mm(A1)x2ø3x12mmTop Cabinet(E1)x1ø3x10mm(C3)x1(D1)x2ø3x10mm(C1)x1ø3x10mm(D1)x7ø3x10mmCD PlayerUnitDC Tray CoverRearPanelPull(C3) x1(C4)x2(C2) x3112Main PWBCD ServoPWBNote 1: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, 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 CD mechanism.2. When fining back the cam gear assembly, let it lock by frontmovement.LOCK LEVERRXD-655/7555DISASSEMBLY FOR REPAIRFigure 8-1Figure 8-2Figure 8-3Figure 8-4Figure 8-5Figure 8-6CLAMP LEVERCAM GEAR RIB(F1)x1ø3x6mm(G1)x3ø3x10mm(F1)x1ø3x10mm(F2)x1(E3)x1(E4)x1(E2)x2Main PWB(E2)x1PowerSupplyPWBPowerSupplyPWB(H1)x9ø3x10mm(H2)x1(J1)x5ø3x10mm(K1)x1ø3x10mm(F3)x1Display PWBHeadphonesPWBOpenCassetteHolderTapeMechanismTurntableDisc Tray(L2) x1CD Player Unit(L1) x2132(M1) x3(M1) x3(N3) x2(N2) x2(N3) x2CD ServoPWBCD PlayerBase(N1)x1ø3x8mmRXD-655/7556DISASSEMBLY FOR REPAIRFigure 9-1(P2) x3(P1) x1(Q1) x5(P1) x1LoadingMotorPWBCDMechanismREMOVING 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) (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 (TAPE 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. Remove the main belt (D1) x 1 pc., from the motor side.2. Remove the FF/REW belt (D2) x 1 pc.Figure 10-1Figure 10-2Figure 10-3(A1)x2Ø2x9mmTAPE2Record/PlaybackHeadErase Head(B1)x2Ø2x9mmTAPE1PlaybackHeadPinch Roller(C1)x1STEP1STEP2RXD-655/7557DISASSEMBLY 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 disassembly 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 so as to protect the optical pickup fromelectrostatic damage.(A1)x2(A1)x1Loading MoterCD Base(A1)x2(B3) x2 ø2.6 x6mmShaft(B4) x1Stop Washer(B1) x1Gear(B2) x1CD MechanismPickupHow 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 2 pcs., to remove the motor.Figure 10-4Figure 10-5TAPE2TAPE1Main Belt(D1)x1TAPE2Main Belt(E1)x1TAPE1Main BeltFF/REWBelt(E2)x1FF/REWBelt(D2)x1MotorMotor(F1) x2Ø2.6x5mmMotorRXD-655/75582 6 72T.F481532223 21 1441 2 95 17 16OUTINGND VCCMPX INAM OSC INAM OSC OUT AM RF IN53 42120 1 1522 16 6OSC1329107161513121411RLRLRLRL173+B4FM OSCAM IN FM INFM OSCFM+B214RL818AUXTAPECDTUNERL R23+B4RL242346916T1/T2REC1345718VCC1+B3+B32314122120P.BH/N17815 19NOR/ HIGH T1/T2+B4LRLR10L NFR NFALCREFR RECR NFL RECPOP REDUCER(T2)L NFR(T1)L(T2)L(T1)+B4+B4REC7418-B2+B45VH+VH-VL-VL+1418RL678,910,111-B1+B1L-OUTR-OUTSP.DET.12-14 25-3615-244-111,238,391067-91 221565859 57 55 54 4950 48 47 46 43 4267-787980-8990-9293-1005253 51 45 44 41 40383936372533-31343511 16131217-20+B7+B7 +B7+B7+B7VDDVLOADRESET VDO22 23 24CE CL DODIVDDAVDD+B6BIAST1/T2REC123+B7+B3+B6-+R-CHL-CH+B2-B2+B3M10V+B4A10VVF2+B463Hz 307-B241810Hz 1K2928-VFVF1+B6+5V+B5CD+BC801+B7T1/T2P.BRECP.B4 5VTFM IF INREG3+B48 19 20 18FM/AMOUT15L R12111012IF IN136SD1013FM MONO/ST117STEREOMONO/STIF OUT24INOUT AFCAM RF IN+B417FM+B46CEDICL DO162 4 83 715 14 13 1110 963-66MPX IN VSSA VDDA MPX INRDS-IDRDCL RDDARSTXINVDDDVSSDXOUTAM RFP-INPOWER AMP.IC901TERMINALAM LOOP ANTFM FRONT ENDFE301CF301FM IF FM IFCOVERAGETRACKINGAM AM BANDT303 T306T351IC303FM/AM IF MPX.LA1832SX351456kHzPLL(TUNER)LC72131IC3024.5MHzX352Q360CNS11from CD SECTIONCNP1LC75341IC601AUDIOJK601VIDEO/MIC101Q703Q704Q70554PINIC700IC70056PIN53PINIC70055PINIC700MOTORDRIVERTAPE MECHANISMASSEMBLYSOLM1,SOLM2SOLENOIDMM1MOTORTAPESWM2T2 PLAYR.PLAYSWM4SWM1T1 PLAYSWM3F.PLAYAN7345K/PLAYBACK AMP.PLAYBACKRchLchRchLchTAPE 1TAPE2PB HEADREC/PB HEADSWITCHINGQ103-106SWITCHING108AC BIASQ111Q109Q126Q110SWITCHINGQ121,122MUTINGSWITCHINGERASEHEADQ128,L104BIAS OSC SWITCHINGQ124BIASAM IF863 IC860KIA4558POPE AMP.-20dBATTSYSTEMMUTE604 606Q864,865Q901-FL701DISPLAYIC700(1/2)SYSTEMUPD780206708Q706-MICROCOMPUTERQ700RESETXL7014.1943MHzVR701JOGRX701SENSORREMOTEKEY0-2to CDSECTIONJK670HEADPHONESMM901FAN MOTORQ907DRIVERQ905RL901SO901TERMINALSPEAKERD809T801TRANSFORMERF804T5AL 250VF805T5AL 250VD810D811-814Q803Q850F806CONSTANTVOLTAGET2AL 250VKIA7810APREGULATORVOLTAGEQ851 VOLTAGECONSTANTZD851T2AL 250VF807KIA4558MICROCOMPUTERIC700(2/2)OPEAMP.562SYSTEMUPD780206ZD801REGULATORKIA7805PVOLTAGEQ852Q802Q801D804D803T2.5AL250VF801D801CONSTANTREGULATORVOLTAGED802-805T802SUB POWERTRANSFORMERRL801AC POWERSUPPLY CORDAC 230V 50HzUNSWITCH 5VVOLTAGEMAIN POWERAUX INAND RECORDQ107,PROCESSORQ603,Q862,Q605,IC561,904ANTENNASO301AQ301AMPFM IFCF303FM IFCF351L.P.FL351QT21AMPL341BALUNREGULATORLC72723ICT214.332MHzXT21RDS DECODERRXD-755/655BLOCK DIAGRAMBLOCK DIAGRAMFOCUS COILTRACKING COILFD0TD0 SLDOSPDO20 222126XOUTWRQDORESDICECONT519 3728 50 56 75RFVDDVVDDVDDADAVDDFIN1RVDDLVDDXVDDFIN2LDSLDDTIN2TIN1CLKXIN23 405155 57 6949 48 66 65 64 63 616257281874641478010799842434544257071LCHOLVSSRCHORVSSCONT2CONT3CONT4+3.3V+3.3V457618 23 24 40 82VCC1 VCC2VCC4 VCC3122517393842418-142229-351516272621+5V123456AGNDR-CHDGNDL-CH+5V+5VDO465 DICLK321CEWRQDRF897OC. DISC NOCLAMP SWCD RES456123162345146532+5VPICK UP UNITIC1LC78645ECONTROLSERVO/SIGNALXL133.8688MHzQ2CONSTANTVOLTAGEQ1LASERDRIVERIC2M63001FPDRIVERFOCUS/TRACKING/SPIN/SLEDMMM1MOTORSPINDLEMOTORSLEDM2PICKUP INQ3CNP7toSECTIONMAINSECTIONCNP8DISPLAYtoCNP4 CNS4MSW1OPEN/CLOSESW2CLAMPDISCSW3NUMBERLOADINGRXD-755/655RXD-655/7559Port No.Port NameI/OFunction1VDD-POWER SUPPLY(+5V)2-20dB ATTO-20dB ATTENUATION3NO USE/DSA STB-GND4TBIASODECK BIAS CONTROL5TT1/T2ODECK T1/T2 CHANGE OVER6REC/PLAYODECK RECORDING/PLAYBACK CHANGE OVER7RES OUTOCD 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 ENABLE OUTPUT22CLKOCLOCK OUTPUT23DIODATA OUTPUT24DOIDATA INPUT25AVSS-GND26O/C SW/DSA DATAICD OPEN CLOSE SWITCH INPUT27NO USE/DSA ACK/TUN SMITUNER SIGNAL METER INPUT28SPEANA 2ISPEANA DATA INPUT(16kHz)29SPEANA 1ISPEANA DATA INPUT(1kHz)30SPEANA 0ISPEANA DATA INPUT(63kHz)3133KEY2KEY0IKEY INPUT34AVDD-ANALOG POWER SUPPLY35AVREF-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(+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 INPUT55FPAIDECK FORWARD RECORDING SWITCH INPUT1. Port Description of MicroprocessorRXD-655/75510CIRCUIT DESCRIPTION