BO-BeoSoundCentury_type26xx-sm维修电路原理图.pdf

rt.Bang&OlufsenBeoSound CenturyTyp 2651, 2652, 2654, 265/lSERVICE MANUALCircuit Description3540178 Danish3540179 English3540180 German3540181 FinchRadioFans.CN 收音机爱 好者资料库22-12-2Adjusffnents .Tuner.Tape.cD .LoudspeakerReplacement of PCB 2 AmplifierReplacement of PCB 3 or 31C4Replacement of a speaker unit.Repair tips .LubricationReplacement of CD drive mechanismTape Wow frequenciesTest functions .Test mode.Display of tuner variantGearbox test .,.Keyboard test .LED testDisplay of software versionPresetting of EEPROMContinuous operation of tape recorderSpeaker sound level adjustmentffi; ;il;il: : : :r :GB5-15-15-15-35-45-45-55-5DF5-10 5-225-10 5-225-10 5-225-13 5-255-14 5-255-14 5-255-15 5-275-15 5-275-17 5-295-17 5-295-17 5-295-17 5-295-17 5-295-18 5-305-18 5-305-18 5-30s-18 5-305-18 5-305-18 5-305-19 5-315-19 s-315-19 5-315-19 5-315-20 5-325-65-55-55-65-55-75-75-75-75-75-75-85-85-85-85-9DisassemblyGlass door. .;. 5-1Front fabric t,r.:.:.:.:. 6-lHandle/PCB 21 Active antenna 5-1Rear panel 6-2CD front frame/PCB 20 Door sensor 5-3Tape/Keyboard front frame. . 5-4Gear box/PCB 9 Gear sensor 54Sf iding bracket for glass door. 6-4Transformer 64PCB 1 - PCB 22 . 6-5 - 6-7Tape mechanism . 5-8Bang &OlufsenCONTENTSSurvey of modules 1-1Specification Guidelines for service use. 1-2Wiring of transformer.,. . 1-3Brief operation guide 1-5Diagrams etc.Explanation of diagramWiring diagramBlock diagrams . 2-3 -2-8Diagrams 2-9 -2-24List of electrical parts .List of mechanical partsAdjustments and repair tipsInsulation test-RadioFans.CN 收音机爱 好者资料库sIBang &Olufsen1 - 1SURVEY OF MODULESIFM/AM decoder . diagr. Apage 2-10Amplifier Sound processing . diagr. Ipage 2-19Output Amplifier, left . . diagr. Jpage 2-20Output Amplifier, right . . diagr. Kpage 2-212 Door sensor transmit.diagr. Lpage 2-222 Amplifier power supply diagr. Mpage 2-233 Microcomputer. ;$:rr1;4 oisptay & Keyboard ;rJ:rrl;l5 Power Supply & Motor Control diagr, Mpage 2-236 rR Receiver. ;.T:rr1;l7 rape dieital ;#:rr:;?7 tape analos ;#?:;7 Reset converter ;$:T-r?I.fSeen from the frontrI1 - 1SURVEY OF MODULES1 - 18 cD servo diagr. Epage 2-158 CD Decoder . . diagr. Fpage 2-169 Gear-sensor . diagr. Gpage 2-171o Mains ;:i1tl-ii11 Re_deck electronic ;$:T1?12 Oscillator . diagr. Dpage 2-1417 FM Front end. diagr. Apage 2-10Seen from the back2O ooor Sensor receive. .,.,., diagr, Lpage 2-2221 active FM Antenna diagr. Ipage 2-1922 Crossover network, left .,.,.,., diagr. Jpage 2-2022 Crossover network, right .,. diagr. Kpage 2-211 / 1 78Z1 - 21 - 2SPECIFICATION GUIDELINESSPECIFICATION GUIDELINES FOR SERVICE USEBeoSound CenturyrV ranfe Type 2651 EUFM-MW-LW range Type 2652 cB, 2653 USA/CAN, 2654 JApOperation Direct, easy-touch pushbuttonsOptional extra Beolink 1000, one-wayCabinet finish BlackFront cover Grey-Red-Blue-Green, type 6037Acoustic system:Active speakersOutput amplifierSound Pressure LevelFrequency responseCabinet principleCroosover frequencyActive crossover networkWooferTweeterNet volumeTuner:Tape recorder:Compact casettePretuneJ radio programs 30 FM or AMFM section:FM range 87.5 - t08.0 MHz EU/GB76.0 - 90.0 MHz JAPFM aerial impedance 75 OSensitivity 1,4;rV 26 dB S/N monoQulgting sensitivity 66 dB mono 63 dB stereoTotai Harmonic Distortion 0,8%o mono 33 dB lkHzlmage rejection 75 dBlF rejection 80 dBAM section:AM range LW 150 -279kHzGBMW 522 - 1610 kHz GBMW s20 tttOiiz USA/CANAntenna Loop 18.1prHSensitivity 4mV/m 26dB S/N 156kHz 47dB 50mV/r gOitHtTotal Harmonic Distortion 42 dB 1494kHzlmage rejection 40 dB 270kHz 30 dB 1494KHzlF rejection 65 dB 270kHz 50 dB 558kHz2x2outputamplifierClass G95 dB IEC noise/3m/stereo/room75 - 20,000 Hz +4 -8 dBBass Reflex3500 Hz24 dB/octave Linkwitz/Ri ley1 0 c m - 4 1.8 cm - 3/q1 .l litresc46 - C120- 2INES1 - 2SPECIFICATION GUIDELINESBang &Olufsenfape transportAuto reverseTape recording systemRecord levelNoise reductionrape swttcnfape freadWow and flutterSpeed deviationFast forwardFrequency rangesig;at to-noise ratioDistortionChannel separationChannel unbalanceErasureErasure freqencyCD player:Drsc type:Converter systemFrequency rangeSignal-to-noise ratioHarmonic distortionConnections:nuOio AuxPower supplyPower consumptionfotaiOimensionrW|*OWeightHX PROAuto Record LevelNRAuto ferro/chromeoynattoy iHarO permalloy) 0.15% DtN +2o/o 53 dB ferrot 62 ;B ferro with noise reduction 56 dB chrome 64 dB chrome with noise reduction 3 5 d B 1 k H z 7 0 d B80 kHz12 cm (5) and 8 cm (3)B itstrea m20 - 20,000 kHz +0.5 dB/ 2 dB 94 dB A-weighted O.025o/o at 0 dB/1 kHzPin t l.t.C.Pin 2 Signal groundPin 3 AF in left 0.25-2V RM5 47kOPin 4 N.C.Pin 5 AF in right O.25-2V RMS 47kOPin 6 N.C.Pin 7 N.C.230V AC 2651 EU240V AC 2652 GB12OV AC 2653 USA/CANtoovnc 2654 JAPMax. 50 wattst wati in stand-by75x37 x17 cm75 x 33.5 x 11 cm on wall bracketOptional accessories:Beolink1000Carrying handle/active FM antennanfV loop antennaWall bracketSubj-ct to change without notice12 kgType 1501, 1502 ltalyType 20368720043Type 2OaSr-Bang &0lufsenwtRtNG or r*o*rrJ*tf,WIRING OF TRANSFORMERType 2551EU 230V-PCB 10, MainsffifrffiXffiilffiXffiilffiilffiil.1 Qve,rN1 - 3WIRING OF TRANSFORMER1 - 3ffimffiilffiilffiXreilJ l 1IIType 2552GB 24OV-PCB 10, Mains1 - 41 - 4WIRING OF TRANSFORMERType 2553cDN, USA 120V-PCB 10, Mainsffiilffiil-/_.- Ig 3,lQvnrNSBang &Olufsen1 - 5BRIEF OPERATION GUIDE1 - !BRIEFBRIEF OPERATION GUIDEBeoSound Century is primarily designed for closeup operation. Only therelevant buttons light up. Use Beolinkl 000for remote control (see Usersguide).RADIO:Turn on the radioChange display indication(display = frequency)Tune into and store all FMradio stations in the areaSearches up/down thefrequencies for an accep-table signalKey in frequency(ex. 87.5MHz)Store the station on a vacantprogram number (0-30)Store the station to a pro-gram number (0-30)Erase the station from pro-gram no.Switching between FM/AM(not all types)Browse through programnumbersKey in exact program numberSelect another sourceSwitch to stand-byN EE.EZnffiflNe2 sec. EE.EEE.EE 1.5P DE E.E1DCOMPACT DISC:Raise the CD-clampLower the CD-clampStart playing the CD(Display = track no.)Browse through tracksSelect track number (ex. 5)Pause the CD playerResume playing after stop,or change display indication(display = track time)Change display indication(display = remaining time)Random play status(display indication isblinking)Random play on/off(display indication rotateswhen random play is on)Select another sourceSwitch to stand-by., 1-ill0$ltu DrspLAy:/ pFEPPAUXITLARY SOURCE:Open auxilay input(start now auxilary source)Switch to stand-byACTIVE ANTENNAOPTION:Select active antenna optionCut out active antenna optionDSOUND ADJUSTMENTS:Raises/lovers the levelsVolume levelStore all sound levelsLoudspeaker balanceBass levelTreble levelLoudnessREMOTE CONTROL:(No light in buttons)Disable the remote control functionRegain the remote control functionDt - 5GUIDE1 - 5BRIEF OPERATION GUIDEDISPLAY:TAPE RECORDER:Start playing the tapePlay the other side (turn)Play from the beginningBrowse through tracksPause the tape recorderFast forwards/rewindsthe tapeErase tape (no source)Resume playing after stopNoise reduction statusNoise reduction on/off(display indication blinkswhen noise reduction is off)Select another sourceRecording pause mode(display blinks alternately)Auto reverse statusAuto reverse onlofl(display indication blinkswhen auto reverse is off)Start recording track 4 (ex.)on CD (only if CD is selectedas source)Stop recording pause modeStart recordingPause the recordingStop recording completelyReturn to approx. recor-ding startResume recording afterpauseSelect another sourceSwitch to stand-byDISPLAY:Dnn- nnnNDDIInPlDEEDEEDJlnr-N TrEt- - l- - lrPrr,.IfIt lt. 1IE lEt ll l.,9cNUa1n1DEEDDL n u drPrBang &Olufsen2 - 2WIRING DIAGRAM2 - 2WIRIN(WIRING DIAGRAM5D .,! ERSI.PP.YA GEAR-/ llF lsaRPEI=. V RI Q va,xsCL A N1PFR,/ L-OORMOTIR CONIRCLMTI.A IABLF V:T3A9lt/23 ricttttit,tP7 D I S P T A Y+ (EVBIARI2-2IAGRAM2 - 2WIRING DIAGRAM2-2(JCD?I VEi-3,tct?o:rir4PJlfrrr)raANlPL 1I- I IRAUXANI NAIVE 5IGNALTURN TABLE I,1O-OR91t!2I rlNrnffi655 66cDl 7 .DI t - !SC i| -_.-. r :i:g- J3:I r az= :t;-:,r,2 - 32 - 3BLOCK DIAGRAM2-iBLOCBLOCK DIAGRAM FOR POWER SUPPLYTR3Z TX7888FJBj?- , , ;-!rP32 r-t5vA5VAP2 - 2230V!I/A NS2 - 3)CK DIAGRAM2 - 3BLOCK DIAGRAMBang &Olufser -lP23-2, a . tt j r . D - . -,:jt., ,336sv-_lt-_: . I-r t:u u il-r* uo v 6 o u ,-lti-u2 AMPLIFIERtrEI R29BC84 7R244. :i| sR35BCB5 7 BP20P t 6 6 A 0P2 -lP 1 6 6 A /or otr -l5VP30 IIe22BC32oNtD 5 dT R 8BC32I7 TAPE5vB -li:;-r-f-Hs rvt -Ilr?2tB:33 76 t RRECEIVER5Vt|;lLr_i P4JIII TUNER5VTAl 0 v,aal1BC558Cl-, ,P4 2i . p3 -2r-l-T-f-lr c 788288 r -frF-lJi 1-r .ut :ffi;- ov,:i:lL;:il- o .0T-4DISPLAY & XEYBOARD- a-T,;|ool.,| BrPbr b1.,- | BCP53 6- 5V4Vrull 4 v)V99tr = orrcneu xBang &0lufsen2 - 4BLOCK DIAGRAM2 -BLOBLOCK DIAGRAM FOR SYSTEM CONTROLR A q T R F B I FTDtrRI trtoon opEt,rcrostoCD ON,/OFFrurrR 0N/lIIIAPE ON,/OFFSYS. ON/OFFT A P E o S C . & 5 / 8 . 4 1MOTOR ON/OFFDOOR CLOSECLAMPER ON,/OFFOPEN,/C L OStTAPE ON/OFFCulZOf rtrDIACRAIl )OPTO RESETSDAIC STROBE 2SCLl41CROCOI.1PUTER3IC2 SOHzrnLllSTROBECLOCKDATACECOI,JNT ERFM ONS T O P S I G .KEYBOARD DATAKEYBOARD STROBELED CLOCKLED DATA-lirrO f o F L = O c .I l uo l & o U i - srs. onzorr-JJ TAPE oSC . 8. 5 /8 . 47MOTOR ON/OJ:-DOOR CLOSECLAI.4PER ON,/OFFOPEN / CL OSETAPE ON/OFFON,/OFFtrDIAGRAI4 XBLOCK DIAGRAM FOR TUNERFM TUNVOL T AGFo2ttOttOZSf f nf O2ND3 1 2 5SEARCHLE VELTU. LEFT3 r 3CROS5 t 0 6 ( 5 r 2 9 1ANT BIRDY FILTER13MONo-,/STEREO2ND-PCB3f t 0 6ST ALKMUT E-DAT ACLOCKCOUNTER1.t 4FM TUNVOL TAGEDISPLAY &KE YB OARDz a x p4x IF RON I FND.- -0_3 . M AV DL I LL IOP 6. AD 5I RLo DLCODER5 2 IAM TUNER5 0 7 . / 0 ,I | . / 4 ,7 l 5 _ljl7 0 5LC12 8TUNNG CONTROL( PL L )LOOP FILTER = oracnau x2 - 52 - 5BLOCK DIAGRAM2 -BLO(N . R .p. e . zRECBLOCK DIAGRAM FOR TAPE ANALOGRtcMUTEt /L I T TNOISE REL!CIIONNOlSE REDUCTIONt1RIGHTVR2232VRVRIlLr I EFElCRDECK A/BNS/ NSVRVRVIl3otl o flfL-l-FI LOGrc Ir+- Jl + lfPAUSEMSSB DEKVR63AP . B .LLVELBREC RP B AP.ll.-AlB = orncnnv x1l a62 - 5DIAGRAM2 - 5BLOCK DIAGRAMBang &0lufseni765;l atr.I f- l 5 o r O t Di,/C POR I God6fd.OtNTFRt,/0 P0Rt t2 - 6IAGRAM2 - 6BLOCK DIAGRAM2 - 6DECK09SER. DATA_-_ cuE112f- 2I HRE. MUTEl,/- rrtn-nEc.- N. n.- PAUSE l4SS# P . 8 . B D E C K A / B712At|)xo-c.a -e# P . B - l V t l T F,- P . 8 . C R , / F FP . B .1 625WINDREl, ND-a cAS-4 FE/cR-t-*-t-.1-t-t-EOUALIZATlON CR,/FEBIAS CORRECTION CR,/FE_-_-_-_ H.S2,t-+ spr I D I oLA_ t./A-o+MUTEfL-OUOD2 - 72 - 7BLOCK DIAGRAM2BLOCIBLOCK DIAGRAM FOR CDI r c7800PHOTO DIODE SIGNALP ROCE SSOR!_l!c _D S CMOTORarcrsos lll| ,.,u II DRIVEr x3?,1f - rL-:- - JNlONITOR DIODE8 I C7402RADIAL ERRORPROCESSOR _H8rc7843fTURN TABLENlOTOR AMP.2 - 7CK DIAGRAM2 - 7BLOCK DIAGRAMBang &Olufsel8IC7842 RAt12- A/ 3/.23.24 5- 940 | 8 9 2 l2 f388rc784DECoDER,FILTER AND DAc 6025249051B r c 7 8 825SERVO !Ptrta 29/23 2 3f 36 30 t7 38/3uCONTR0LL ER8 r c7802RADIAL ERROR8IC7800PHOTO DiODE SIGNALP RCCE SSOR6 2 2 2 5 2 2 A 5RS232 BUSBang &Olufsen2 - 8BLOCK DIAGRAM2BLBLOCK DIAGRAM FOR AMPLIFIERL,/R TREBLEPOWER AMPOUTPUT TREBLEr_li 22 ecrrvt cROssovER NErwoRK rc. IBASS EXTENSION/2 ICA7trU LEFTE = or,qccnMOOJ?FP!5OND I FFERENCE| /2aP *FTLTER-Bang &0lufsen2 - 1 0DIAGRAM A2D) onGRAM A FM/AM DE.DERTU NER U NITMODULE 1FM- FRONTENDl0Slllz 7-9v87.9ttlz 1.3-2v9Oltlz 7-9v JAPAN781+lzl,3-2.2v JAPANlSllkHz 8.5Y +-0,1v EURoPE522kHz l. lv +-0.3v EUROPE279kHz 8.5v +-0.lv Etn0PElS3KllZ lV +-0.1V EUROPEl7lfiHz 8,5v +-0. lY USA530kHz lY +-0.3v USA522KHz l IY +-0.3v JAPANl829kHz 8v +-0.3v JAPANFxFtlFilFMIffttLWLUtttfllfllfl_ _ 9_F10LEr9ll-0,1-93 ES.3l0,l-217-03140.SERV.ES-ttTWffiffifuAM- OSCILLATORt3151 Hor ron us,r9107U32-10DIAGRAM A2-10-:-r-.-.-:-.-:-:-!-.-9-.- !-!-!-3-r1-.-3-3r-1-.-FM-DETECTORSEARCH-LEELt0 0A0PC83 ,JS111,_ 456kHzffiffiffih,/1i_tl0y L-l 0vl-.lll= ruLi,Y-l= u- = FU !i8n- - AM sigr7113 r3151r ONLY FOR AYA ONLY FOR FMx oNLY FoR USAQ xor ron usrL 2-102-102 - 1 0- -!3-:- 21 26 -L rrot ttzi zr0l c2I ztoz czI zro: cri 2to1 E2; . 2105 0/ti zroT Gs; 2108 csi 2r0s c8i 2lr0 D8i 2l l4 816i zus 817i 2116 8181 2ll7 D20r 2ll8 F20i B zlls o2l1 2120 F2l| 2l2l E7| 2t23 cAl 2t21 et1| 2125 09| 2t26 010| 2126 iloTo DTAGRAM r,/M I c 2129 or3pcBz . pLUc zo | 2t3l 016Jsr i ;lil l?1117 l. 2r1z 16| 2143 t3LEFT I Zt11 K1lP28-l I ZtlS JsI D 2115 L6| 211? Jl5| 2r1B Jt5| 2149 Jt5r. 2150 JlG| 2tst rtz3t87 F223190 tfl33191 8t63t96 8r83t9? J233198 0l?3200 c63202 x73223 CA3225 Jl83233 DZ3236 0103239 0t33210 nt3211 ltt3212 Ctz3213 n13211 8193215 J225l0t F5st02 015t03 0s5104 8t25105 8t55106 0125107 J35t08 t?5t0g t35llt 0t15n2 Lt25l13 085u1 165!28 Bl05129 Jt05l0l il36102 r(16109 F226121 tll86t23 il7?tot 047102 c1?r03 E97101 8t6?t05 n37106 J221107 L227108 lt1?t09 0r17il0 L2?il t t27il2 n57l13 iltz7tt1 n2?u5 I17il6 C77t20 0229160 J7sT0P stc | . 3103 83I n 3lol c3r 3105 E2MU|L i gtoo os| 310? 01srEREo t 3108 Es| 3109 c1E | 3ll0 0| 3lll 05| | 3ll2 c5corJtIER | 3tt3 R5| 3ll1 c7DT I 3ll3 3;| 3u7 C?ctocr( | 3lt8 8?| 3t20 Rt3| .l 3tzl BilI gtzz BltI 3123 Bt?| 3121 818r. 3125 820| 3126 820| 312? 020| 3128 F20i r 3129 016| 3l3l 019i 3132 013| 3133 olol. 3133 rr0I 3t31 013i 3l3s F8i 3110 L2i, 3l1t t12i - 3t1z )tzi 3113 J4i 3111 Jsi. 3t1s r5i 3u6 H6i 3117 r(si 3118 rsi r :l;3 ti,i 3tst 0t2| 3152 012I 3153 L3i 3ls1 L1I 3lss nlS1 3156 Il5| 315? 011i tl 3158 iltl| 3lsg Nt7| 3160 il18| 3162 Jt3l 3t63 122| 3161 Jlo| 3165 Jl?| 3166 Jl8| 3t67 Jt7| 0 3t?0 t2l| 3t?r Lzt| 3t12 K22| 3l?3 X23| 3186 021J FOf, AMJ FOR FM.Y FoR tSI toR us-+2821e62-112-112-11DIAGRAM B rApE DrGrrAL (pcB DRAWTNG sEE pAGE 2-13)RECORDER/DIGITAL PARTMODULE 7RE-DEC(DELECTROIII CIODULE I It - - - - - tINTERC0NilECTI0N | .-B0nB!_ | i9PR(TECTI()N DI()t)EFoR 7639CRPSTRNf10T0RA3645 PVCC?5298C807-l12-112-11DIAGRAM B) J l807- 40il z.zvvllEl3641t N ltl_ lCLOCK INPUOS - SERI8L OUI8 SISGE SHIFIREOI STER8 8IT SHIFTREGI STEROE?70940FROIlP I N+5V366 I38132-11IAGRAM B2-11DIAGRAM BBang &OlufsenI O J f ,I 655I 656 1 6 6 1 2t5l2t68360 43605360?360SJ O Z )E 7829E 2E l 4D l tK23F23D21F23F22023G r 6E 8F 8G 80 1 0F 9c l 00 1 0F l I828c23c t 2t1l50 1 3nt2123n r 6E l 5F 1 7R l 7R 1 8B 1 ?8 1 8c28c28H l 6E 1 lH23TO IIRGRRII 6PC83 PLUO 5l 6553529B : o : t363536 373639364 I364 33645364?c a6483649365 r365 53657366 I366 43565D 366?36683669367036? l36t236?436?5E 36?736793?50380538073 8 1 33 8 1 73820F 3900390 13907663 l?625t6217629763 I ?633+5VRECNUTEN R 8PflIJSEP80-8PVCC10.6V _t s . 8 - l 1 v )-_ -._ P0lNtu Jb49 _3.6V:vilil-.-ut I b:bu=/ O J f ,?6 3?76 39?64 17643764 51647?653H lloa?09*t,; n00uLE t2il DrscRnn 0+5v5V _IC VOLTROTSA TERSURED IN+ PLBYERC( noDEO r.v.uIee)o_-o_-.;:=o_ca-E.Oo_:=L-OCOEOo_C);_l(YOo_a;Bang &0lufsen2-12DIAGRAM C2 - 1DIAGRDIAGRAM C rApE ANALoG (pcB DRAWTNG sEE pAGE 2-13)1,?,3,456RECORDER/ANALOG PARTNODULE 7I 65912661l t t n oTIl v R3171VRTAPE DCI(TODUL 91-_-1IIIl gt=t-tH_ t EI 650AA#ouo*nI t . , v *rr-,T-l-I 12J T =:E=-tl764s V llPB ov _BcB17- ao_l r LlvP8 IN O LIFTC 1OSCILLSTOR05C. CONTROLc2lznrq j 2611r-;.-,rR , nv+zzN 9 rlh-rFt 4V Iii ii- lrr r.ill looN n s.ovlraREC 1 3 .8V?655ToVnn BC848Bin oJP8 IN R R:GHTPB IN 8 R,O