Kenwood-RXD-371-S-Service-Manual电路原理图.pdf

MINI HiFi COMPONENT SYSTEMRXD-251/301/301E/301W/RXD-351/351E/351W/371S/A3SERVICE MANUAL©1998-7/B51-5454-00 (K/K) 3763(XD-251A3)*In compliance with Federal Regulations, following are reproduc-tions of labels on, or inside the product relating to laser productsafety.*Refer to page 2 if you want to know system configuration.KENWOOD-Crop. certifies this equipment conforms to DHHSRegulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.DANGER : Laser radiation when open and interlock defeated.AVOID DIRECT EXPOSURE TO BEAMPanel(CD) *(A60-)Front glass *(A29-)Knob *(K29-)Knob (K29-7512-08)Knob (K29-7519-08) Knob (K29-7518-08)Phone jack(E11-0386-08)Konb(K-29-7516-08)Cassette lid(R) *(A53-) Front glass(R)(B10-3451-08)Front panel *(A60-)Knob *(k29-)Knob(K29-7523-08)Knob(K29-7522-08)Knob(K29-7521-08)Cassette lid(L) *(A53-) Front glass(L)(B10-3450-08) Knob(K29-7515-08) Knob(K29-7511-08) Mic jack(E11-0387-08)Knob *(K29-)Knob *(K29-)Knob(K29-7513-08)Illust. is RXD-351.* Refer to parts list on page 38.FM indoor antenna (1)Europe and U.K.Other countriesAM(T90-0815-08)loop antenna (1)AC(E03-0115-05) plug adaptor (1)Remote(A70-1260-08) control unit (1)Batteries (R6/AA) (2)Use to adapt the plug on the power cordto the shape of the wall outlet.(Accessory only for regions where use isnecessary.)(T90-0801-05): K1P1Y1M1M2M3X1X2X3(T90-0836-05): E1E2E3E4T1T2Q1Q2Operation to resetThe microcomputer may fall into malfunction (impossibility to oper-ate, erroneous display, etc.) when the power cord is unpluggedwhile power is ON or due to an external factor. In this case, executethe following procedure to reset the microcomputer and return it tonormal condition.Press the “POWER“ key while holding the Stop (7) key ofthe CD section pressed, to switch off the power, and thenswitch the power on again after a few seconds.CRPlease note that resetting the microcomputer clears the contentsstored in and returns and to condition when it left the factory.SYSTEMMAIN UNITDESTINATIONSPEAKERXD-301RXD-301E3T2X3LS-N301XD-301ERXD-301EE4LS-N301XD-301WRXD-301WQ2LS-N301XD-351RXD-351E1T1LS-N351XD-351RXD-351M1X1Y1LS-N371XD-351ERXD-351EE2LS-N351XD-351WRXD-351WQ1LS-N351XD-A3RXD-A3K1P1LS-N351XD-371SRXD-371SM2LS-N371XD-251RXD-251M3X2LS-N351RXD-251/301/351/371S/A32CONTENTS / ACCESSORIESCONTENTS / ACCESSORIES.2EXTERNAL VIEW.3CONTROLS.4BLOCK DIAGRAM.6CIRCUIT DESCRIPTION.7CD MECHANISM OPERATION DESCRIPTION.9ADJUSTMENT.11WIRING DIAGRAM.15PARTS DESCRIPTIONS.16PC BOARD.17SCHEMATIC DIAGRAM.23EXPLODED VIEW.37PARTS LIST.38SPECIFICATIONS.47ContentsAccessoriesSystem configurationCautionsRXD-251/301/351/371S/A33EXTERNAL VIEWSlide switch (S62-0083-08)AC power cord *(E30-)Cabinet *(A01-)Phono jack(E63-1073-08)Slide switch(S62-0057-08)Lock terminal board(E70-0108-08)Antenna terminal *(E70-)Illust. is RXD-351.* Refer to parts list on page 38.RXD-251/301/351/371S/A34CONTROLSCD unitDISC 1DISC 2DISC 3076¢CRCR4DISCSKIP1234567Receiver unitON/STANDBYINPUTSTANDBYMIC 1MIC 2MIC VOLUMEMIN.MAX.TIMER SETCLOCKDISPLAY/DEMOROCKFLATEX.BASSPOPJAZZBANDTUNINGPHONESUPDOWNAUTOPRESETMANUALPRESETAUTO/MONOTIMER890!#$%&()CRCR“CRCR£CRCR*¢CRCRCRCR1Skip (4,¢CR) keys2DISC SKIP keyUsed to skip discs.3Disc selection keysThe disc number is selected directly and playback starts.4OPEN/CLOSE (0) keyThe disc tray is opened and closed.5Stop (7) key6Play/pause (6) key7Disc trayThree discs can be stored.8ON/STANDBY () key9INPUT keyKey for input switching.0TIMER keyKey for timer START/STOP switching.!MIC 1/MIC 2 jack (except for some areas)MIC VOLUME knob (except for some areas)#TIMER SET keyUsed for setting the timer ON/OFF time.$CLOCK keyUsed to set the present time.%DISPLAY/DEMO keySwitches the display contents.*Used for demonstration (DEMO) ON/OFF.AUTO/MONO keySwitches the tuning mode.&MANUAL PRESET keyUsed to memorize broadcasting stations in the desired order.*BAND keyPress to switch the receiving band.(TUNING/keysUsed for tuning to broadcasting stations and for time settings.)PHONES terminalFor connection of a headphone (optional).CRAUTO PRESET keyUsed for automatic presetting of broadcasting stations.“CRVOLUME CONTROL knobThis is used for volume adjustment.£CRSound selection keysUsed to select the desired sound type.FLAT: For listening without changing the sound.JAZZ: A sound quality curve suitable for jazz.POP: A sound quality curve suitable for popularmusic.ROCK:Asound quality curve suitable for rock-and-roll.EX.BASS: For listening with abundant bass. (Can be usedtogether with other sound selection keys.)¢CRDisplayCRSTANDBY indicator (Except for some areas)RXD-251/301/351/371S/A35CONTROLSRXD-251/301/351/371S/A36BLOCK DIAGRAMCEDICLVREF24 23 20 19 16 141 2 5 911233,28 2,29 1,30+TUNERCDAUXCONTROLSERIESDATAA/BPLAYAMPALCPLAYR/POSCBIAS(Q209,L201)Q205Q203 Q204Q206Q201Q202TAPE OUTTAPEQ405,406REC BUFFERIC402TAPE OUTREC OUTREC INDECK A/B SWQ213+BIC301MIC AMPMIC INQ403,404+3dB AMPPRE SETEQ.PRE AMPIC404EX-BASS412Q411,410Q409, RL501Q413,414MUTESYSTEM714-10dBATTENUATORQ713,POWER AMPIC501+VCC-VCCQ504-506DETECTORIC502SPEAKERPROTECTOR+12V512Q511,MUTEJACKSPEAKERLchHEADPHONESJK502RchJK501+5.5VQ702+7.5V +12VQ701Q704+VCCSWITCHEDtoX'FORMER-12VQ709+12V-VCCCN701D702-705D701Q705,706Q703LCD DISPLAYIC601u-COMKEYMATRIXCN09to CD PCBCN401to MAIN PCBRFAMP FILTERRCTUNEAMPMIXIFT CF1BUFFOSCTUNEAMPIFCF2TUNEAM RFAMPRFQ106FM SECTIONQ101PLLIFTAMu-COMIC201L.P.FQ107,1087.2MHzAM SECTIONV.T.AM ANTGNDFM ANT OUTMIXBUFFAMPTUNEAM ANTGNDFM ANTAMPAM RFTUNEOSCANTRFIFTPLLL.P.FQ107,108AMPRFIC201u-COMAMPQ106IFT CF1IFFILTERAM SECTIONAMFM SECTIONCF2OUTRCIC102IC102TUNEFM RFFMOSCQ102GNDIC01 CXA1782BQRF SIGNAL PROCESSING/SERVO AMPPROCESSOR W/DACDIGITAL SIGNALCD POWER DRIVERIC03 BA5936SI/O PORT EXTENSIONIC02 74HC4094IC04 CXD2508QXTL0133.86MHzIC15 NJM4558LOP AMPMMOTORDISCMOTORFEEDMTRACKINGFOCUSTRAY MOTORT/T MOTORSWLIMIT INOUTPUTAUDIOCONTROL SWS01-04RchLchu-COMSUB WOOFERIC602-VCC+VCCPRE AMPJK601USED RXD-301(X3)/RXD-351(M1,X1)/RXD-371S(M2)IC201FM FRONT-ENDFM RF IC101TUNER UNITCD MECHA. UNITTUNER UNITAUDIO UNIT/DISPLAY UNITRXD-351IC401RXD-A3(K1,P1) TYPE ONLYNo.NameI/ODescriptionActiveHL1CEILC7218, LC75392 CE out2ENABLENo used3DIILC7218, LC75392, 74HC4094 data out4DOOData output to LC72185CLKILC 7218, LC75392, 74HC4094 clock out6DATAOSerial data out to CXD2508Q7SQCOISerial output of SUBQ 80BIT8SQCKOClock output9XLATOLatch output10FOKOFocus OK output11GNDGND12RESETIReset signal input13POWER - DOWNIPower down input14SENSICXD2508Q sens15VSSVss16X1Xtal 6.0MHz17X2Xtal 6.0MHz18VDD1Vdd1922K1K4IKey input (K1K4)23, 24GNDGND25MODE - SW2IModel discrimination (RXD-371S only)26MODE - SW1IModel discrimination27SCORICXD2508Q Sub - code synch detect28COUNTOTrack number count signal output29REMOTE INIRemote signal input30VR +IVR encoder input A31VR -IVR encoder input B32PIC - UPIPick - up SW33PIC - DOWNIPick - down SW34DISC - COUNTIDisc counter SW35TURNTABLE - SWITurntable SW36TRAY - OPENITray open SW37TRAY - CLOSEITray close SW38N/CNo used39VR - 1OVR step extend out0, 1 stepothers4051N/CNo used5255S1 - S4OSegment out (14)56VDD2Vdd57VSS2Vss5879S5S26OSegment out (526)8082BIAS 31GND8386COM - 03OFL Common 0387FM - STEREOIFM stereo signal inputMonoStereo88SYN RECISynchro start input89VSS3VssRXD-251/301/351/371S/A37CIRCUIT DESCRIPTION1. Microprocessor : (IC601, LC867224A-5H71)1-1 Pin descriptionPORTSW 1SW 2SW 3SW 4SW 5SW 6SW 7SW 8SW 9SW 10Pin 19PowerInputClockTimerTimerDisplayEQ OffRockJazzPop(K1)SetModeSetPin 20TuningTuningBandAuto/AutoManualEX Bass(K2)UpDownMonoPresetPresetPin 21CDAMS -DiscDisc 1Disc 2Disc 3Open(K3)AMS +SkipClosePin 22CDCD PlayFF(K4)StopPauseRXD-251/301/351/371S/A38CIRCUIT DESCRIPTIONNo.NameI/ODescriptionActiveHL90VDD3Vdd91POWER - SWOPower SW outOnOff92SYS - MUTOSystem mute outOffOn93TU - MUTOTuner mute outOnOff94MODE - SW - ININo used95FUNCTION - TAPEOFunction tape outTapeOthers96LCD - BACK - LIGHTOLCD back light controlOnOff97N/CNo used98EX - BASSOEX - bass controlOnOff99LATCHNo used100STBO74HC4094 strobePINNAMEI/ODESCRIPTIONACTIVE4MUTEOCXD2508Q Muting (DAC)H : ONL : OFF5CONTROLOCXA1782BQ, CXD2508Q Vdd controlH : OthersL : CD6XRSTOCXD2508Q XRST7T T +OT T/U D Motor (+)11CONTROLOT T Motor speed Control12TRAY -OTray Motor Control (-)13TRAY +OTray Motor Control (+)14T T -OT T/U D Motor (-)4. All LCD light on mode The all LCD light up when the STOP key and TIMER SET key are pressed simultaneously, while the power is ON. When the ON/STANDBY key is pressed, the all LCD light on mode is canceled.2. Key matrix3. I/O port extension (CD mecha. unit)IC02 (74HC4094)RXD-251/301/351/371S/A39CD MECHANISM OPERATION DESCRIPTIONROTARYMOTORGEARPULLEYRELAYGEAR ARELAYGEAR BTR LOCKGEARUD-CAMUD REDUCEGEARCHANGEGEARTURN TABLEDISC 2DISC 1DISC 3DISC SWFig.1SW CTRAYMOTORFig.3Fig.223TR GEARSENSOR SW(STOPPOSITION OF DISC 3)1. In case of disc 3 (Refer to figure 1 and 2)1The rotary motor turns counterclockwise by pressing disc 3 key, therefore the turntable turns clockwise and disc 3 is detect-ed by disc number detector switch.2The turntable stops the position of 3marked as figure 2 and stop position of disc 3 is detected by sensor switch.At this time, the position of TR lock gear is as shown figure 1.3The rotary motor turns clockwise and the relay gear B also turns clockwise.By turning the relay gear B, the arm of relay gear B moves to arrow direction (2 7 7 7) and the TR lock gear will belocked.After that, the change gear separates from TR lock gear.4The UD reduce gear turns clockwise by turning the change gear.5The traverse moves up-side.6After finished the traverse operation, the disc motor turns and the disc 3 will be played.2. Open/Close operation of traywhile playing the disc. (Refer to figure 3)1The tray motor turns clockwise by pressingopen/close key while playing the disc.2The change base moves to frontward byturning the TR gear.3Pushing switch C by change base, the traymotor stops.RXD-251/301/351/371S/A310CD MECHANISM OPERATION DESCRIPTIONHow to replace the pick up. (Refer to figure 47)1. Remove the screws (1x 4), top chassis and spring (2x 2).2. Detach the traverse unit by removing shield (bottom side) and screws (3x 2).3. Short the short land and remove screws (4x 4, 5x 1).4. Remove the rod and replace the pick up.1x21x23x13x12x22x1Fig.4Fig.5BOTTOM VIEW4x24x25x1Fig.7Fig.6SHORTLANDTOPVIEW