Kenwood-RXDM-57-Service-Manual电路原理图.pdf

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1、COMPACT Hi-Fi COMPONENT SYSTEMRXD-M57MP-H/M57MP-SSERVICE MANUAL(HM-537MP) 2004-8 PRINTED IN KOREAB51-5923-00 (K/K) 339In compliance with Federal Regulations, following are repro-duction of labels on, or inside the product relating to laserproduct safety.KENWOOD Corp. certifies this equipment conform

2、s to DHHSRegulations No.21 CFR 1040. 10, Chapter 1, subchapter J.DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.Caution : No connection of ground line if disassemble the unit. Please connect the ground line on rear panel, PCBs, Chassis and some others.70%Fro

3、nt cabinet assy *(A60-)Knob(Open/Close)(K29-8416-08)Knob(EQ/Bass) *(K29-)Knob(Volume)(K29-8413-08)Control panel *(A21-)Knob(Demo) *(K29-)Knob(Prog) *(K29-)CD Door *(A29-)Knob(Power)(K29-8417-08)Knob(Function)(K29-8414-08)Knob(Stop/REC)(K29-8415-08)Cass lid assy *(A53-)Rubber foot(G11-2961-08)Knob(Pl

4、ay) *(K29-)Phone jack(E11-0981-08)* Refer to parts list on page 20.Remote control unit (1)(A70-1688-08)AM loop antenna (1)(T90-0908-08)FM ANT Wire (1)(T90-0918-08)Batteries (R6/AA) (2) AC plug adapter (1)(E03-0115-05)Use to adapt the plug on the power cord to the shape of the wall outlet.(Accessory

5、only for regions where use is necessary.)RXD-M57MP2CONTENTS / ACCESSORIES / CAUTIONSCONTENTS / ACCESSORIES / CAUTIONS.2EXTERNAL VIEW .3ADJUSTMENT .4PC BOARD .8SCHEMATIC DIAGRAM .13EXPLODED VIEW .19PARTS LIST.20SPECIFICATIONS.BACK COVERCONTENTSACCESSORIESSYSTEM CONFIGURATIONCLASS 1 LASER PRODUCTLASER

6、 KLASSE 1APPAREIL A LASER DE CLASSE 1LUOKAN 1 LASERLAITEKLASS 1 LASERAPPARATThe marking this product has been classified as Class 1. It means that there is no danger of hazardous radiation outside the product.Location: BottomResetting the MicrocomputerThe microcomputer may malfunction (unit can-not

7、be operated, or shows an erroneous dis-play) if the power cord is unplugged while thepower is ON, or due to some other externalfactor. If this happens, execute the followingprocedure to reset the microcomputer andreturn the unit to its normal operating condition.Plug in the AC power cord to the wall

8、 outlet,and within 5 seconds, press and hold downthe 7 button and press CD button. Please note that resetting the microcomputerwill clear the contents of the memory andreturn the unit to the state it was in when itleft the factory .CAUTIONSSYSTEM RECEIVER SPEAKERSHM-537MP-H RXD-M57MP-H LS-M57-HHM-53

9、7MP-S RXD-M57MP-S LS-M57-SRXD-M57MP3EXTERNAL VIEW220-240V110-120VVOLTAGESELECTORTop cabinet(A01-3943-08)FM 75 ohm Ant.(E70-0200-08)Rear cabinet(A80-4494-08)Voltage SW. *(S62-0124-08)* Refer to parts list on page 20.RXD-M57MP4ADJUSTMENTSERVICE ADJUSTMENT Lubrication The mechanical parts are factory c

10、oated with a thin coat of light grease and should not require further lubrication. If a light grease is applied, be careful not to get any grease on the play/record head or erase head, hubs, pulleys, tapes reels, drive belts, or switches. Use a good lubricant such as Silicon Lube G322L or Lubricate.

11、Service Check Before aligning the mechanism, wipe off any accumulated dirt with denatured alcohol. Wipe around parts where the tape contacts and around all rotating parts. Drive belts are specially processed. Do not clean them with alcohol. Mechanical Torque Use a cassette type torque gauge and chec

12、k the tape mechanism. Take-up torque 35 to 70 g-cm Rewind torque 50 g-cm min. Fast forward torque 50 g-cm min. Pinch Wheel Pressure No adjustment to the pinch roller spring is necessary. It should be sufficient to give at least 40 g-cm pull force. Tape Head Servicing Each time the unit is serviced,

13、the face of all heads should be thoroughly cleaned with denatured alcohol or commercial head cleaning solution. The playback head should be demagnetized with a commercial demagnetizer. Accumulation of tape oxide during normal operations can cause problems, including loss of high frequencies and wow

14、and flutter. Erase Head The erase head is properly aligned when the tape rides directly between the tape guide on the head without crinkling the tape. Play/Record and Playback Head Azimuth Adjustment To adjust the play/record and playback head azimuth screw: 1. Connect two (2) VTVMs and a dual trace

15、 scope to the stereo headphone jack (as shown) with a 32 ohm dummy load. (See Figure 1.) VTVM VTVMDUMMY LOADJK400SCOPECH1CH2Figure 1. Azimuth Adjustment RXD-M57MP5ADJUSTMENT2. Insert a 10 kHztest tape (TeacMTT-1141V orEquivalent)into the tape mechanismand playit back.3. While playing backthe test ta

16、pe, slowlyturn the azimuth adjusting screwuntil the amplitude ofboth channel output waveformsismaximumand in phase. Note: Reiteration adjusting Right, lift the screw,until the amplitude ofboth channel output waveformismaximum.(See Figure 2.) 4. Securethe azimuth screwin place with glue orpaint after

17、making the adjustment. Figure 2. Head Output Signal TapeSpeedAdjustment1. Set the function switch to TAPE. 2. Connect a frequencycounterwith a 32 ohmdummyload to the stereo headphone jack. (See Figure 3.)FREQUENCYCOUNTERDUMMYLOADJK400Figure 3. Tape Speed Adjustment 3. Insert and playbacka 3 kHztestt

18、ape (TeacMTT-111 orEquivalent)into the tape mechanism.4. Insert an insulated alignment tool and adjustthe tape speed potentiometer(MOTOR)until the frequencycounterindicates2940 Hzto 3090 Hz. Bias Oscillator Frequencyand Level Adjustment 1. Set the function switch to TAPE and the recordand playtape m

19、echanismto RECORD. 2. Connect a VTVM and frequencycounterto test point R/P HEAD. 3. Adjust biasoscillator coil L203 until the frequencycounter indicates67 kHz0.5 kHz.RXD-M57MP6ADJUSTMENTTUNER ALIGNMENT PROCEDURE Equipment needed: 1. AM Signal generator 2. FM Signal generator 3. DC Voltage meter 4. O

20、scilloscope 5. Output meter (VTVM) AM Alignment Step S/G Frequency Dial Setting Indicator Adjust Remarks 1 450 kHz (1 kHz 30% mod.) 612 kHz Connect oscilloscope or VTVM to speaker jack T101 Adjust for maximum output 2 531 kHz (1 kHz 30% mod.) Low end Connect DC voltage meter to test point Vt and gro

21、und L102 Adjust until Vt equal to 1.5 0.05V 3 1602 kHz (1 kHz 30% mod.) High end Same as step 2 Confirm Vt: 6.58.5V 4 612 kHz (1 kHz 30% mod.) 612 kHz Same as step 1 L103 Maximum output 5 1404 kHz (1 kHz 30% mod.) 1404 kHz Same as step 1 TC101 Maximum output 6 Repeat steps 4 and 5 to minimize tracki

22、ng error 7 999 kHz (1 kHz 30%mod.) 999 kHz Same as step 1 Offset is less than 6 dB. 60 cmAM SIGNAL GENERATORAM LOOP ANTAM LOOPANTENNADUMMY LOADVTVMTEST UNITFigure 4. AM IF/RF Tracking RXD-M57MP7ADJUSTMENTFMAlignment: TESTUNITFigure 5.FMBand FrequencyCoverageAlignment Connect FMS/G to ANTinputs (mod

23、1 kHz 22.5kHz dev.) StepS/G FrequencyDial Setting IndicatorAdjust Remarks 1 87.5 MHzLowend Connect DC Voltage meter to testpoint Vt and ground ConfirmVt: 1.7 0.2V 2 108 MHzHigh end Sameasstep 1 ConfirmVt: 8.5 1V Figure 6. FM Band/Tracking FM GENERATORDUMMYANTENNATP1TEST UNITDUMMYLOADVTVMOSCILLOSCOPE

24、VtGROUND DC8ACEBD2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view)CN501SW511KEYHEADPHONESW510SW509SW516SW506SW512SW503SW19SW515SW505SW514SW513SW500SW502SW504SW517SW507SW501SW508LED500IC501CN1CN3JACK2CN4JK400PHONESCN403OPEN/CLOSETIMERSETT

25、IMERON/OFFPRE/ALBUMUPPRE/ALBUMDOWNEQ/1158X-BASSDEMOPROGRAMRECPLAY/PAUSECDTAPE/MODETUNER BANDSTANDBY31DIRECTIONF-SKIP UPF-SKIP DOWNSTOPVOLUMER513R514R515R516R500R521R520R519R517R518R524R509R510R511R508R507R506R505R504R503R522R501R502R523R512L405L406L408J4C2C8C1C402 C4012FHJLNGIKMO1357 46CN103IC101IC2

26、02IC402CN101CN102D105IC302CN402CN302CN303CN304Q428CN301IC201CN201D202D108D106D102D101D103D104D409D107D201ZD101ZD410Q303Q304ZD302ZD301D401CN401LRSPEAKERSCN404Q416D410D411Q401Q111Q107Q115Q101Q114Q204Q209Q205Q113Q302Q408Q301Q414Q413Q404Q425Q426Q109Q208Q213Q427Q415Q412Q210Q211Q217Q216Q215Q212Q214Q110Q40

27、2Q409Q105Q103Q104Q112Q106Q102FP101IC102IC301IC401IC103MAINC139C142C144C176C170C177C174C148L105L108C235C257L202C261C263C258C204C243C262C203C264C272C270C238C463C444C330C328C332C440C302C322C447C127TC101C130C134C154C135C131C115C153C114C109C111C113C104C107C420BP101TIEGND1OSCGND2TRAOSC2CF101CF102CF103CF10

28、4C428C416C415C438C429ECECL407 L403L404 L409L413L412C465L-chR-chC439GNDC445 C418C340C331C441C446C321L203C325C327C461C265C224C271J4J3J2J5J14J7J27J24J89J30J13J15J22J29J55J53J90J91J72J62EBEBJ61J59J80J78J79J71J54J43915111311IGO13711 8169J52J20J18L101L301J36J40J37J58J48J83J70J82J74J77J88J76J63J60J57J46J45

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32、7C159C152C106C108C128C326R166R174R113R111R160R158R170R119R120R133R318R315R134R142C141C140C118C147C173C169C268C254C269C266C255C260C245C291C226C202C252C163C164C171C151C143R118R115R154R161R114R162R110R159R103R125R404R414R482R454R310R453R452R455R405R496R491R448R440R476R477R303R304R312R351C443C313C319C31

33、7C315C455C364C480C477C479C324C320C448C336C312C314C318C316C310C306C304C363C311C309R352R335R238R216R228R215R235R207C259C256R205R206R259R204R302R495R415R483R417R428R422R434R457R458R459R429R470R419C417C451C453C414C419C421C431C412C413R432R425R427R433R418R106R108R107R469R403R444R308R406R165R123R101R104R10

34、2R157R172R116R117R140R143R141R139R210R212R249R261R262R264R265R267R266R236R201R250R243R244EBEBEBEBEBEBBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBERefer to the schematic diagram for the value of resistors and capacitors. PC BOARD(Component side view)910PQSUWYRTVX2 1357 46Q704Q7

35、09Q711Q706Q707Q708Q712Q703Q710Q705MP3CN704CN705ZD703ZD701ZD705D703D702ZD704ZD702CN700CN707CN706CN702IC702 CN703CN701IC701IC704IC706IC700IC705IC707IC703C770J9L704J27C700L710R700J48J42J40C780C724R748J41J24J54R743R747R745R744R746C779C740C723C722C713C710C709J8X701C777R726R727J34J38C791J52J53C734C754C707

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38、29R730R733R731C771C748C739C737C792R6R5C749C744C731R702C753R704C751C745C752R701C755R751R754C762R755C761R758R757C764C750R703R749C756R741R706G79FEVREFTEG63R819R818R760G84R768R769R770R771R772R761R762R763R764R765R766R767C767R774R775R776R777R778R779R780R787R788R791R792C7663V3C763R734R815R720R816R719R817R7

39、05C732R735R736R737C775R785C776R739C781R784 C778R786C746G78R1C725C726C730C743C7291911530315051808110012413131151612OGI1316121530161714811617323348496411 92 1 3 1163217EBEBEBEBBEBEBEBEBEBECN601CN607CN602D601ZD601D605D607CN608CN605LCD601DISPLAYD602CN609Q604CN604CN603Q607D604D603LED605 LED604D606D608CN6

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41、C648C614R620R621R616R656R657R661R625R658R623R643R644C666R642R631R628R655R648R649R647R650R645R604R603R618J13J131191521191ECCE101118 11 8J2J3J4R659R619J5J6R664R622J18J27J30C622C610J35R629C602C613J33L602R627 J31J26J25J17J24 J23J16J22 J21 J20 J19X602R605J28R615C603C601C618R606R607C660J7J8R660J11R624J14J

42、15R610R609R608J32R632J34R652R651R663R626J29X601R617J9J10J12R666R662R633R6371140308081100515031EBEBEBEBBEBEWHT-AWHT-BORG-AORG-BRED-BRED-ABLKF901F904F902F903C921C922C912C910C909C911R908J1J2C918C917R905R904R907C919R906C920R901R902R909C914C916C915C913C908C906C905C907C901C903C904C902C925R903ECCBE11 1EBLUAC2AC1BLU1RL901TR901L901C923Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)1112