Kenwood-RV251-avr-sm 维修电路原理图.pdf

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1、AV SURROUND RECEIVERR-V251SERVICE MANUAL 1999-8/B51-5562-00 (K/K) 179270%Caution : No connection of ground line if disassemble the unit.Please connect the ground line on rear panel, PCBs, Chassis and someothers.* Refer to parts list on page 25ON/STANDBYPHONESINPUTTAPE 2(MONITOR)TA/NEWS/INFO.DISP.AUT

2、O A.MEMO BANDPTYCLOCKMODETIMERSETTUNINGMODEMULTI CONTROLLEVELVOLUME CONTROLDOWNUPAV SURROUND RECEIVER R-V251 R D SEONSYSTEMCONTROLFRONTSURROUNDCENTERSUB WOOFERSUB WOOFERPRE OUTREARFRONTCENTERSPEAKERS( 6-16 )UNSWITCHED TOTAL150W MAX.AC 230V 50HzANTENNAAMFM 75 GNDTAPE 2(MONITOR)TAPE1 / MDCDAUXINRECVCR

3、PLAYRECPLAYRECPLAYRLLAUDIOVIDEOVCRREC OUTMONITOROUTDVDVCRPLAY INLRRLC131015171912112IN495757DVD 6CH./2CH.INPUTR161820224331333937353432363840Panel dressing(A21-3777-03)Window(B10-2367-02)Panel *(A60-)Knob(k29-6727-04)Button(R) *(K29-)Button(L)(K29-6816-02)Phono jack(4P)(E63-0186-08)Phono jack(6P)x2(

4、E63-0187-08)Lock terminal board(E70-0120-08)Phono jack(E63-1137-08)Phono jack(6P)(E63-1136-08)AC outlet *(E03-)Lock terminal board(E70-0119-08)Power cord bushing(J42-0346-08)Metallic cabinet(A01-3750-08)Lock terminal board(E21-0034-08)Phono jack(4P)(E63-1152-08)Phone jack(E11-0188-05)AC power cord *

5、(E30-)RadioFans.CN 收音机爱 好者资料库R-V2512CONTENTS / ACCESSORIES / CAUTIONSContentsCONTENTS / ACCESSORIES / CAUTIONS. 2BLOCK DIAGRAM .3CIRCUIT DESCRIPTION.4ADJUSTMENT.8PC BOARD . 9SCHEMATIC DIAGRAM . 13EXPLODED VIEW .24PARTS LIST.25SPECIFICATIONS .31FM indoor antenna (1)(T90-0830-08)AM loop antenna (1) (T

6、90-0804-08)Remote control unit (1)(A70-1306-05): RC-S0506.TE(A70-1305-05): RC-S0505.XBattery cover (A09-0378-08)Loop antenna stand (1)Batteries(R6/AA) REMOTE CONTROL UNITRC-S0506A B+1054321098766788%fi?44?1?3377?221ALL INFO.TEXT DISP.TITLESEARCHMEMOTUNERBANDe STILL STEP EA.MONI.AUTOMEMORYRDSDISPLAYP

7、TYSEARCHDISPLAYSLEEPNEXTPREV.POWERTIMECLEARP.MODECHECKSTEREOMUTESOURCEDIRECTDSPLEVELVOLUMEPRO LOGIC 3 STEREOMULTICONTROLTESTTONEMODEINPUTTAPE 2(MONITOR)FREEZEPAL/NTSCRETURNTAPEMD/LOSELECTP.B.C.REC/ARMO.T.E.LDAUTO DIGITALCD/VIDEO CD/LDREPEATFRAME/TIMEPTYTA/NEWS/INFO.DISC SKIPEDIT MODEALL TEXTSEARCHP.

8、CALLfi?%How to reset the microcomputerThe microcomputer may malfunction (impossibility of operation,erroneous display, etc.) when the power cord is unplugged andplugged in again while the unit is in ON mode with the keypressed or due to other external causes. In this case, execute theprocedure on th

9、e right to reset the microcomputer and return theunit to the normal condition.Unplug the power cord from the wall outlet.While holding the (ON/STANDBY) key depressed,plug the power cord into the wall outlet again.Resetting the microcomputer clears the memory you entered andreturns it to the initial

10、condition when the unit left the factory.AccessoriesCautionsRadioFans.CN 收音机爱 好者资料库FL DISPLAYTUNER UNITK01POWER AMPK02K03K02BD1017815+VH(AMP)-30VAVRKEY MATRIXSTK411-210EIC103STK410-010EIC104Q119-124Q113-118NJM2068DIC113HEADPHONESLRLRSPEAKERCSLSRSW-PRE OUTM62446FPIC107ELECTRIC TONE/VOLUMEBD102IC10179

11、15IC102Q101-VH(AMP)+VL(AMP)-VL(AMP)F1FILAMENT ACFL DISPLAY+5V(u-COM)+10V(PRO LOGIC)+5V(VIDEO SEL)+7V(E.VOL)+15V-15V-5V(VIDEO SEL)-7V(E.VOL)F2IC106(2/2)TC9163ANIC111NJM2068DIC112NJM2068DIC105CDX271AQIC110NJM2068DIC702(2/2)NJM2068DIC603-6ab ATTIC702(1/2)LC7821IC601LC7821IC106(1/2)DOLBYPROLOGICIC108NJM

12、2279SELECTORVIDEOTUNERCDAUXMD PLAYPLAYTAPE/MONITORVIDEO PLAYTAPE/MONITORRECMD RECVIDEO RECVIDEO PLAYVIDEO RECDVD/GCH INPUTMONITOR OUTLRCSLSRSWDVDGCH INPUTIC701u-COMFLT701+MUTELRCSLSRSWCRLSWSRSL-10ab ATT-B LOW TAP-B HI TAP+B LOW TAP+B HI TAPLRCSLRRGRIDREMOCON INROTARY ENCODERRELAYVIDEO1,VIDEO2,VMUTEE

13、.VOL (DATA,CLK,STB)10ab ATTMUTETUNERRESETP/L (DATA,CLK,STB)SYNCHRDRDSPROTECTIONSEGMENTKEY SCANKEY RETURNR-V251R-V2513BLOCK DIAGRAMR-V2514CIRCUIT DESCRIPTIONActivePin. No.Pin NameI/ODescriptionHL1,2G1,G2OFL grid control.3PULL UP-Connected to VCC(+5.0V).4POWER DOWNIAC selector.5VOL. UPIVolume encoder

14、A(CW) signal.6RDS CLKIRDS IC(IC703) clock input control.7VOL. DOWNIVolume encoder B(CCW) signal.8RMCIRemote control signal input.9RDS DATAIRDS IC(IC703) data input control.10,11NC-Unused.12PROTECTIONIDetection input port of protection.ON13STEREOIDetection input port of stereo signal for TUNER.STEREO

15、14PLL CEOPLL IC(IC402) CE signal output.15RCVR CLKOSEL. IC(IC601,602,106) clock signal output.16RCVR DATAOSEL. IC(IC601,602,106) data signal output.1719KEY31IKey return 31.20S. DATAI/OSerial communication data.21S. BUSYI/OSerial communication busy.22E.VOL CKOE.volume IC(IC107) clock control.ACTIVE23

16、E.VOL DTOE.volume IC(IC107) data control.24E.VOL STOE.volume IC(IC107) strobe control.ACTIVE25PLL DOIPLL IC(IC402) DO signal.26RCV CEIReceiver chip enable signal.ENABLE27DSP CEODSP IC(IC105) XLAT.28AVREF-Analog power supply(+5.0V).29H/P DETECTIDetection input port of headphones jack.30SDIDetection i

17、nput port of SD signal for TUNER.TUNED31S. LEVELIA/D input port of signal level.32DSP READYODSP IC(IC105) ready.33DSP DATAODSP IC(IC105) data.34DSP CLKODSP IC(IC105) clock.35OPTIDiscrimination port of model.E,TX36CH.SPACE-Unused.37AVSS-Analog ground.38RESETIu-COM reset.39EXTALIMain clock(10MHz).40XT

18、AL-Main clock(10MHz).41VSS-u-COM ground.42TX-Sub clock(32.768kHz).43TEXISub clock(32.768kHz).44VDD-Power supply(+5.0V).45VFDP-FL power supply(-33V).46T. MUTEOMuting control of TUNER.ON47MAIN MUTEOMuting control of main output.ON48H/P MUTEOMuting control of headphones.ON49VCR MUTEOVIDEO IC(IC108) con

19、trol.ON50DSP RESETODSP IC(IC105) reset.51RCV. CEIReceiver chip enable signal.52-Unused.53F. RLYOFront speaker relay control.ON54S. RLYOSurround speaker relay control.ON55C. RLYOCenter speaker relay control.ON1. Microprocessor : (FRONT PCB,IC701)1-1. Pin descriptionPin No.NameI/ODescription13T.POTest

20、 monitor. Normally outputs Low.(Unused.)4VSSO-Digital GND.58T.POTest monitor. Normally outputs Low.(Unused.)9TSTOIDigital GND.10VDDO-Digital power supply.11VSS1-Digital GND.1215TST14IDigital GND.16XRSTISystem reset input. Reset when Low.17BFOTOUnused.18CSL1IDigital power supply.19CSL2IDigital GND.20

21、VSS2-Digital GND.21AVS3-L-ch DA converter GND.22AVD3-L-ch DA converter power supply.23LOUTOL-ch DA converter output.24AVD1-L-ch AD converter power supply.25AVS1-L-ch AD converter GND.26L01OL-ch AD converter LPF operational amplifier inverted output.27LINIL-ch AD converter analog input.28AVD5-C-ch DA

22、 converter power supply.29AVS5-C-ch DA converter GND.30XCOUTOC-ch DA converter output.31AVDX-Analog power supply for master clock.32XTLOOCrystal oscillator circuit output.33XTL1ICrystal oscillator circuit input.34AVSX-Analog GND for master clock.35XSOUTOS-ch DA converter output.36AVS6-S-ch DA conver

23、ter GND.37AVD6-S-ch DA converter power supply.38RINIR-ch AD converter analog input.39LO2OR-ch AD converter LPF operational amplifier inverted output.40AVS2-R-ch AD converter GND.R-V2515CIRCUIT DESCRIPTIONActivePin. No.Pin NameI/ODescriptionHL56POWER RLYOPower relay control.ON5710dB. ATTOVolume 10dB

24、attenuator control.ON58ST. LEDOSTANDBY LED control(RED).ON59ST. LEDOSTANDBY LED control(GREEN).ON6069-Unused.70779S16SOFL segment(916) and key scan(18) control.78851S8SOFL segment(18) control.8688-Unused.89VDD-u-COM power supply(+5.0V).90,91-Unused.92100G11G03OFL grid control.2. Key matrix3. Pin des

25、cription of dolby prologic IC(MAIN PCB IC105)KS1(77pin)KS2(76pin)KS3(75pin)KS4(74pin)KS5(73pin)KS6(72pin)KS7(71pin)KS8(70pin)K1(19pin)MODETUNING -PTYAUTOTIMERTIMER TIMERK2(18pin)MULTI TUNING CLOCK-MODESETTAMEMOK3(17pin)MULTI -INPUT ON/STBYINPUT TAPE2DISPBANDR-V2516CIRCUIT DESCRIPTIONPin No.NameI/ODe

26、scription41AVD2-R-ch AD converter power supply.42ROUTOR-ch DA converter output.43AVD4-R-ch DA converter power supply.44AVS4-R-ch DA converter GND.45VSS3-Digital GND.46SCKIShift clock input for microcomputer interface.47REDYOTransfer enabling signal output for microcomputer interface. Transfer prohib

27、ited when Low.48T.POUnused.49XLATILatch input for microcomputer interface.50RVDTIData input for microcomputer interface.51XS24ISerial data 24-/32bit slot selection.24-bit slot when Low.(valid for slave mode)52VDD1-Digital power supply.53VSS4-Digital GND.54T.POUnused.55SIIGND.56T.PIGND.57BCKI/OUnused

28、.58LRCKI/OUnused.59VSS5-Digital GND.60XMSTIDigital GND.6163T.POUnused.64VSS6-Digital GND.6572T.POUnused.73VDD2-Digital power supply.74VSS7-Digital GND.7580T.POUnused.IC CHANNELLchRchLchRchLchRchLchRchLchRchLchRchLchRchLchRchIC PORT22732642562372282110191118SURROUND-prologicstereo6ch inputprologicpro

29、logic6ch inputprologicSPEAKERFLch FRch FLch FRchFLchFRchSLch SRch SLch SRch SLch SRchCchSWch CchSWchDOLBY PROLOGIC-XXXXDOLBY 3STEREO-XXXXXDSP LOGIC-XXXXXSTEREO-XXXXXXSOURCE DIRECT-XXXXXXX6ch INPUT(6ch)-XXXXX6ch INPUT(2ch)-XXXXXXXIC CHANNELRchchRchchRchchRchchRchchRchchRchchRchchIC PORT13022932842762

30、57249221021INPUT SELECTOR-VCR REC TAPE1/MD REC-MONITOR TAPE2 PLAY-ATTCD-X-AUX-X-VCR-X-X-TAPE1/MD-X-X-MONITOR ON-X-XTUNER-X-DVD/6ch INPUT-X-7CIRCUIT DESCRIPTIONR-V2514. Function table4-1. Mode selector: KIC9163AN(IC106)4-2. MODE/ATT selector IC: LC7821(IC602)5. Test modeSetting : While pressing the I

31、NPUT key,plug the AC power cord into the AC wall outlet.All the fluorescent display indicates.(The all-illuminated state is cleared by pressing any main unit keys.)Cancelling: Plug the AC power cord out from the AC wall outlet.?(B)FM-SGFM-SGAM-SGMPXAGAGAG(A)(D)(C)AC voltmeterOscilloscopeDistortion m

32、eterDummy antennaINPUT PCBIC601PIN 30 (Lch)PIN 1 (Rch)8ADJUSTMENTR-V251No.1ITEMDISCRIMINATORINPUT SETTING(A)CARRIER FREQ. : 98.0MHzMOD FREQ.: 1kHzDEVIATION: 75kHzSELECTOR: MONOANT INPUT LEVEL: 60dBuOUTPUTSETTINGConnect aDCvoltmeter toTP401TUNERSETTINGMONO98.0MHzALIGNMENTPOINTST402ALIGN FOR0V50mVFIG.

33、3TUNED LEVEL(A)CARRIER FREQ. : 98.0MHzMOD FREQ.: 1kHzDEVIATION: 75kHzSELECTOR: MONOANT INPUT LEVEL: 30dBu5dB-MONO98.0MHzVR401AdjustVR401 andstop at thepoint where(TUNED)goes ON.2DISTORTION(STEREO)(A)CARRIER FREQ. : 98MHzMOD FREQ.: 1kHzDEVIATION: 67.5kHzPILOT: 7.5kHzSELECTOR: L or RANT INPUT LEVEL: 6

34、0dBu(B)AUTO98.0MHzT403Minimumdistortion.FM SECTIONBAND : FMTuner adjustmentAM SECTIONBAND : AM1TUNED LEVEL(D)CARRIER FREQ. : 999kHzMOD FREQ.: 1kHz30%DEVSELECTOR: MONOANT INPUT LEVEL: 30dBu5dB-999kHzVR402AdjustVR402 andstop at thepoint where(TUNED)goes ON.?R272C231C232C235R263R264R236R279R276R233R244

35、C250C249C206C205C247R232R235R231R04R288C55C54R56R54R53R50R40R44C194C246R222R220R202R76C243C244C150C160C138C139C143C64R94R13C11C12C10C09R46R08R59R72R29R31R47C42C41C133R148C65C66R127R144C124C122R142R146R137R130R118R102C67C68R147C111R125R103C131C135R145RC45C46C123C121R143C130R91R105C105R107R109R111C107

36、C50R254R35R192R174R173R175R196R190R201R221R219R37R195R217R215R24R23R09R10R26R25R22R21C04R216C223C226C224R285C233C229C230C234C225R277R280R208C227C207J78J77J76J75J74R234R06R05R03R136C53J71J70J73R133R83C05C193C245R256R255R253R281R77C70R81R168R166R165C148C149R163C141C108R110R112R108C106R106R12C44C295R58

37、C33C34R62R61C36C37C241R32R287C296R92R128R104C144R140J65J64J63J62J67J66J68J60J61J79C128C132R93R139C63C112R124C119R149R126C114C120R150C113R117R123R167R164R80R86R79R85R78R82R170R169C170C168C167C169C159R282C222C182R178R189R213J72C181R177C186R181C182C185R179C183R180C184R186R185R187R205R134R135R20C137R203

38、R204R188C221C228R283R265R266R27312122421854118065644140252445814581458D10D09D151D08D201D202D20IC107IC113IC110IC105IC112IC111J162J102J103J108J104J29J26J17J18J27J28J30J34J15J14J12J251J252J244J250J245J246J247J242J241J33J35J107J109J110J111J49J50J48J47J46J45J43J219J82J81J218J215J200J214J83J42J41J44J112J1

39、13J114J116J115J129J150J152J149J151J153J154J155J156J157J158J166J167J168J164J165J170J176J174J175J177J223J222J202J199J198J197J196J195J194J193J188J192J186J185J187J184J183J182J178J190J189J224J212J211J210J209J128J118K01K02J132J138J133J234J146J233J239J135J136J137J134J140J143J139J143J208J207J204J216J206J203

40、J232J231J230J213J240J1911412815J142J144J169J163J171J117J101J106J54J53J52J51J40J39J38J37J36J21J19J227J229J221J226J225J238J20J25J57J16J263J262J261J260J259J10 J263J254J255J256J257J258J31J32J22J243J24J23J55J120J145J160J161J235J119J131J121J122J123J130J56J105J127J147J124J125J126C210C216C215C209C214C26C27C

41、195C197C198C196C187C176C188C48C49C47C175C178C177C179C180C174C173C172C171C157C140C127C103C101C102C118C126C125C104C43R69C21C22C20C19C18C17C129X101C61C134C62C31C32C56C251C52C189C190C191C109C110C117C158C163C164C166C161C165C162C28C208C13C14C240C220C236C238C237R248R247R271R262 R261C218C211R240C4011478C39C

42、24C23C25C38C35C07C08C06R237R213R239R238R200R132R55R225R252R251R74R75R199R197R198R226C199C30C29C202R36R270R269R278R119R19R138R120R121C115R113R116R101R292R88R33R286JK104JK101JK102R11R98R97R65R64R67R45R151R152R155R295R296R156R159R160CNT101JK103C151R60R63C152C153C154C155C156R66C239K03SPK101SPK102R275L10

43、1L102L103L105L104C212R210R246R209R243R245R211C51R57R52C293R194R218R48R90R73R72R71R89R141R114I G OR115C116R122J220R129R131C147R49R51R18R193C201C203R34R42C204R84R38R207R229R208C200R224R223R184R39R176R183R171R172C69R214R249R230R43R41R242R241C58C59C217C219R268R258R274R260R259R257R250R07R95R28R30R87R02R9

44、6IIGGOOR01R17R154R153R158R157R162R161R267EEBBEBEBEBEBEBEEBEBE11211128143BBEBEBEB126122EBEBEBEEEBBEBEBEBEBBEBEBEEBBEBEBEBEBEEBB313012EBZD102ZD21ZD101ZD22ZD12ZD11CN110ZD23ZD202ZD201ZD203ZD19ZD20ZD204IC104IC103D23D22IC102IC101D04CN601D02D03IC106D01Q215Q151Q211Q120Q217Q218Q207ZD10Q221Q219CN105Q220BD101B

45、D102CN103CN101IC109CN102CN701Q209IC108Q208Q124Q123Q121Q119Q114Q120Q113Q111Q110Q122Q203Q201Q204Q205Q118Q117Q115Q116Q101Q214Q213Q202Q206PHONESRMAIN UNITLREARSPEAKERSRPRE OUTREC OUTOUTDVDRMONITORVCRPLAY INFRONTLVIDEOSURROUNDSUBWOOFERCONTROLSYSTEMCENTERSUBWOOFERCLFRONTCENTERABDFHJCEGI2135746Refer to the

46、 schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view)109R705J784J786J785J783R706R739R735R731C708R720R719R715R768R771C723R714R713R769R711J781J782R710R708R709J787J788R751R750R749R732C713R740C454R446R447C456R431C428C427C424C403R404C406C419R424R421EEBEEEEBBBBBR417C4

47、15C410R403C420R413C472 C409R411R408R414R407R428C416R422R452C461R453R458R437R465R439C617R642R648R641R635R632R631R628R627R624R623R620R619R616R615R612R611R608R607R604R603C623R636J691R436C476C453R429J430C435C434C433C432R725C715R736R734C707C704C705R762R729R729R727R721R722R774R772R770C725C721R746R748R747R

48、745C701C720C719R724R723R738C712R427R445R449R469R438R470R633R634C621C620C619C622R643R644R638C631R639C635R640C636C632R637R645R646R647J426J428R460R442R430C430C423C422R402C404R405R416C418R601R606R605R602R609R610R613R614R618R621R617R622R625R626R629R630C601C602C604C605C606C607C608C610C611C609C612C613C614C

49、615C616C603C414R418R425C457R464C452R461R451C450R415C412R409R401C417R448R454R455R761R76011100102011808151503031D722D720D721D719D718D717D713D402D601D602D401D405D404Q407Q408Q402Q401Q405Q406D709D710D714D707D706D703D705D701D702IC701IC703J737J746J745J744J743J742J741J740J739J738J748J747J732J730OGIJ731J729J

50、727J718J719J712J713J705J702J763J762J701FLT701J710J643J649J653J641J642J607J622J602J651J648J711J704J703J723J724J726J720J721J722J717J749J764J709J635J534J633J625J624J623J626J644J621J611J609J610J608J606J605J604J603J601J620J619J618J617J613J615J614J630J629J628J613J612J637J638J410J412J414J404J409J434J639J40