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    NAD-C372-int-sm 维修电路原理图.pdf

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    NAD-C372-int-sm 维修电路原理图.pdf

    NADSERVICE MANUAL C 372STEREOAMPLIFIERC 372STEREOAMPLIFIERMay 2005 RadioFans.CN 收音机爱 好者资料库ALIGNMENT PROCEDURE (C372) I. INITIAL ADJUSTMENT (No load connected) A. OUTPUT OFFSET VOLTAGE 1. Connect a DC Millivoltmeter between TP303 and TP304, then adjust VR303 (50kohms) to get a reading of 0V +/-3V so at the speaker terminals of 0V+/-30mV. 2. Connect a DC Millivoltmeter between TP403 and TP404, then adjust VR401 (50kohms) to get a reading of 0V +/-3V so at the speaker terminals of 0V+/-30mV. B. IDLING CURRENT 1. Connect a DC Millivoltmeter to TP301 and TP302, then adjust VR302 (500ohms) for 5-6mV reading on meter. 2. Connect a DC Millivoltmeter to TP401 and TP402, then adjust VR402 (500ohms) for 5-6mV reading on meter. 3. Leave power “ON” for a minimum of 5 minutes. C. ISC SENSITIVITY Connect a DC Millivoltmeter to TP701 and TP702, then adjust VR701 (47kohms) between 50mV to -100mV. II. FINAL ADJUSTMENT Repeat procedure A and B for offset voltage and idling current alignment respectively. VR303 VR302TP303 TP304TP302TP301VR402VR401TP402TP403TP404TP401LEFT CHANNELRIGHT CHANNELRadioFans.CN 收音机爱 好者资料库MAIN BOARD B649E C B2SB6492SD669PORT2/0PORT2/1PORT2/2PORT2/3PORT2/4PORT2/5PORT2/6PORT2/7VCCXTAL2XTAL1PORT3/1PORT3/2PORT3/3PORT0/0PORT0/1PORT0/2GND123456789101112131415161718Z86C0812PSC1234567891011121314GNDVCC74LS00IC902:QP0 QP1 QP2 QP3 QP4 QP5 QP6 QP7123456789101112131415168-STAGE SHIFT REGISTER8-BIT STORAGE REGISTER3-STATE OUTPUTSDCPSTROEQS1QS2VCCGNDCD40942SA8722SA10152SC1815A970E C BK369D G S2SK369S G VIS1U621LR103470 MFR105470 MFC102100pC103100pR107470 MFR109470 MFR111470 MFC104100pC105100pC106100pR113470 MFR115470 MFR118470 MFC107100pC108100pC109100pR1161MR1141MR1121MR1041MR1061MR1081MR1101M654RL6B654RL7B654RL8B654RL9B654RL10B654RL11B654RL12BRCA1CCDRCA1EVIDEORCA2AAUXRCA2CTUNERRCA3AREC2RCA3CTAPE1RCA3EREC1RCA2ETAPE2RCA4APREOUT1RCA4BPREOUT 1RCA4EPREOUT 2RCA4FPREOUT 2R203470 MFR205470 MFC202100pC203100pR207470 MFR209470 MFR211470 MFC204100pC205100pC206100pR213470 MFR215470 MFR217470 MFC207100pC208100PC209100PR2161MR2141MR2121MR2041MR2061MR2081MR2101M321RL6A321RL7A321RL8A321RL9A321RL10A321RL11A321RL12ARCA1DCDRCA1FVIDEORCA2BAUXRCA2DTUNERRCA3BREC2RCA3DTAPE1RCA3FREC1RCA2FTAPE2R119220 MF12345678910M102C372 PREAMP MODULE+V34R120100C2118.2PR219220 MF-V3412345678CB5018PINL buff outR buff outGND+34V-34VLoutGNDRout+V34-V34C21222NPEC213220uC214220PR22375/FS 0.5WR22222K654RL2BA2RV5B1KC215220PRCA4DMAIN LINRCA4CMAIN RIN12345CB3015PIN123456CB4016PINR753100C78610n/63VTO LEFT POWER AMPTO RIGHT POWER AMPRCA1BDISCRCA1ADISCR101470 MFC101100pR1021M654RL5BR201470 MFC201100pR2021M321RL5AC11122NPEC112220uC113220PR12475/FS 0.5WR12322K321RL2AB1A1RV5A1KC114220PR1171MR2181M456SW2BSOFTV34RCLLEDBRIDGELED8RL5C12V8RL6C12V8RL7C12V8RL8C12V8RL9C12V8RL10C12V8RL11C12V8RL12C12VD7301N4148D7311N4148D7321N4148D7331N4148D7341N4148D7351N4148D7361N4148V5IR INIR out+12VTAPE1TAPE2TUNERAUXVIDEOCDDISCA SPEAKER ONIRMUTEB SPEAKER ONMAIN ON789SW3CBRIGDE12345678910CB90610PIN12345678910CB90710PIN+12VR126100KR226100KV34RPRIRMUTE+5V+12VR127200R227200C501220u/25R5063K32 MF 1%R507750 MF 1%R504390 MF 1%R505180 1%B1A1RV1A10KAB1A1RV2A10KAC50722n 2%C5080.1u 2%R5011K5 MF 1%R502390 MF 1%C5030.22u 5%C5040.97u 5%C509470PRV4A20K MNC601220u/25R6063K32 MF 1%R607750 MF 1%R604390 MF 1%R605180 1%A2RV1B10KAA2RV2B10KAC60722n 2%C6080.1u 2%R6011K5 MF 1%R602390 MF 1%C6030.22u 5%C6040.97u 5%C609470PRV4B20K MNR5035K1R6035K1ONOFFOFFONBALANCE POTBALANCE POTBASS POTBASS POTTREBLE POTTREBLE POTRV3A10KARV3B20KA12345678CZ5018PINVOL-UPTONE RINTONE ROUTTONE LOUT12345678910M501C372 PREAMP MODULER509100C51144P-34VR511590 1% MFR609590 1% MFMD1CR5232K2R5212K2R5252K2R5202K2R5242K2R5222K2C5204u7C5214u7Q502C1815Q501A1015Q504C1815Q503A1015MOTORMVOLUME CONTROL5V1234CB5024PINVOL-DNTONE-LINC60210nC50210n+34V-34V+34V+34VTONE&VOL BAL456SW4BDEFEAT123SW4ADEFEATC5220.1u-34VR51310MR5141.6 MFR6141.6 MFR51510KR61510KQ8042SK209R81018KR8011KR80810R80410R8021KR8051MR806 430R8091KR8031K5R807560Q8062SA1225Q8012SA1312Q8022SC3324Q8052SC3324Q8032SC2983C8021NC80147pFQ8092SK209R81818KR8111KR82010R81910R8121KR8141MR815 430R8171KR131K5R816560Q8122SA1225Q8072SA1312Q8082SC3324Q8102SC3324Q8112SC2983C8041NC80347pF12345678910P80110PINVEEVCCVCCVEEVCCVEER821220C80522pC80822pR822220C8060.1uFC8070.1uFC8090.1uFC100.1uF123SW3A456SW3BR1110K+12VR1222KR1310K-V34PRSP BSP AMAIN ONBG_OBG_IBG_SBG_OBG_IBG_SJIRAIR INJIRBIR OUTSTR1D2CLK3OE15Q14Q25Q36Q47Q514Q613Q712Q811QS9QS10VCC16GND8IC9054094STR1D2CLK3OE15Q14Q25Q36Q47Q514Q613Q712Q811QS9QS10VCC16GND8IC9044094C90220PC90320PX90112MHzC9010.1uC9150.1u+5VCVITUAUT2T1DILD902CDLD904AUXLD901DISCLD905TUNERLD903VIDEOLD907TAPE1LD906TAPE2R9244K7R9031KR9232K2Q913A1015P241P252P263P274VCC5X26X17P318P329P3310P0011P0112P0213GND14P2015P2116P2217P2318IC902Z86C0812PSCQ901C1815Q902C1815Q903C1815Q904C1815Q905C1815Q906C1815Q907C1815R9224K7R9204K7R9184K7R9164K7R9144K7R9124K7R9104K7C90610nC90710nC90810nC90910nC91010nC91110nC91210nCVITUAUT2T1DICDVIDEOTUNERAUXTAPE2TAPE1DISCCDVIDEOTUNERAUXTAPE2TAPE1DISCR9094K7R9114K7R9134K7R9154K7R9174K7R9194K7R9214K7R93910KR90610KR94010KGREENGREENGREENGREENGREENGREENGREENR935100R936100R93710K8123456712111091314IC90174LS00+5V+5V+5V+5VR92510K+5VV34R+12VK907VIDEOK906AUXK904TAPE2K905 CDK903TAPE1K901DISCK902TUNERVSGIC903IS1U621LC90410u+5VK908BR9306K8R9332K2R9280Q910C1815LD911BRIDGELD912SOFTLD909BAA SPEAKER ONA SPEAKER ONMUTE blinkV34RA SPEAKER ONTAPE1TAPE2TUNERAUXVIDEOCDDISC+5VREMOTEREMOTECONTROLLERKEYBOARDB SPEAKER ONIRMUTEB SPEAKER ONBLD908AB SPEAKER ONQ908C1815R9084K7C91310nR9074K7Q909C1815R9044K7C91410nAR9054K7BRLEDCLLEDIRMUTEB BRLEDCLLEDPRPRK909A1593BLINK+5VR927330R934820Q912C1815D9091N4148D9121N4148LED910LED2GRNREDGRNIR OUTIR IN+5VIR OUTIR IN+12VD9076V8+12VR92922KLED BOARDP ON/OFFD9081N4148D9061N4148D9101N4148D9111N4148P12VTO PHONE BOARD CZ70612345678910CZ90610PIN12345678910CZ90710PIN1234CZ5024PINV34RQ914C1815R94110KR9434K7P ON/OFFR9442K2R9452K2Q916C1815R901200R9001K+5VR9021KQ915A1015+5V+5VNC1NC2NC3Vss4SDA5SCL6NC7Vcc8IC90624C00R93110K+5VC90547uF/25VR938330R92622R798330R61015KR51015KR121562R221562/2SD1815/2SD1815/2SB1215/2SB1215C372 PREAMP MODULEC372 PREAMP MODULEC252N2C262N2CHASSISCHASSISTO STAR GNDTO STAR GNDRLO2ARLO4AR VSPSP0RSP0LL VSPPOWER AMPFROM RIGHTTO SPEAKERSL OFFSETL PHONESR PHONESR OFFSETLALBLA-LB-RA-RB-RARBCB1SPK-OUTRLO3ARLO1APOWER AMPFROM LEFT2SA1943B C E2SC52002SA8722SA10152SC1815A872E C BB649TL431LM3171 2 3LM317R A KE C BTL4312SB6492SD6691:ADJUST,2:OUT,3:INLM337LM337 1:ADJUST,2:IN,3:OUT1 2 3LM7805LM7805 1:IN2:GND,3:OUTC71722n/250VC71822n/250VC724C727Q7042SC1815Q7032SA1015D702BT151-500RD703BT151-500RR7031KR71522KR706100R7081KR7041KR7051KR707100R70922KR7100.025/3W 2%R711100 1%Q7052SA1015Q7062SA1015R713470KFPH1H2L1L2G52.1V AC35.1V ACC73022n/250VC73122n/250V40V ACR733240/1% MFR735240/1% MFR7326K2/1% MFR7346K2/1% MFC75422u/50VC75522u/50VC75622NC75722NINIC703LM317MINIC704LM337MC75022NC75122N+V34-V34C7482m2/50VC7492m2/50VC75210u/50VC75310u/50VD7091N4148D7101N4148C72022n/100VC72122n/100VR7461/1W FSR7471/1W FSR7481/1W FSR7491/1W FSC73222n/100VC73322n/100VC7341000u/100VC7351000u/100VR7161KR7171KR72233 FSR7191KR7181KR7201KR7241KR7211KR73010KR7261KR7253K3R72810KR72333 FSR7271KR72922KC738100u/16VC74210u/100VC7434u7/100VC739100u/16VC74722u/80VC74422nC74147PC74047PC74522nQ7092SD669A/KSC2690Q7102SC1775AQ7112SC1775AQ7122SB649A/KSA1220Q7132SA872D7051N4148D7061N4148D7081N4148D7071N4148C73647u100VC73747u/100VR73122KC74622u/80V+V34+V68-V6861.5V ACQ7142SC1775AQ7152SD669A/KSC2690R7366K2R7373K9R738270/2W FP+V34V34R+12VACS1ACS2+-B705DB104ACS1ACS2+-B706DB104ACS1ACS2+-B703KBU1004ACS1ACS2+-B704KBU1004ACS1ACS2+-B701DB101C70622NC7072m2/16VC708100NC710100NC70910u/16VINIC7017805D7011N4148V5C72222n/100VC72322n/100VD7041N5401123456789CB4029PIN123456789CB3029PIN10A10A1AQ7072SA1015Q7082SC1815R71422KR76836K 1%R7401K 1%R7421KR78936K 1%C70310uF/50VC70410uF/50V123SW2AR7441KR7411K 1%D73224V/0.5WD73124V/0.5WSC-NOVER CURRENT+68V-68VPOS 90POS 80+V68-V68-68V+68VOVER CURRENTSC-PFROM VI OVER LOAD DET IN POWER AMPD7241N4148D7221N4148R78122KQ7232SA1015+12VRLO1B36VQ7272SC1815R7885K6+V34clip123CB7058RL2C12VL PHONESR PHONESC75910nCHASSISR7452.2+20/-10%C72810000u/80V x 6C7250L0RSP0LSP0RSTARGROUNDPOINT-V64TO LEFT POWER AMPI/VI/V OVER LOAD DETFROM POS 80FROM POS 90(TRIG)+V64-V64SOFT CLIP12345CB7045PIN12CB7022PIN12345CB7035PIND7251N4148RLO3B36VQ7252SA1015Q7262SA1015D7231N4148D7261N4148R78610KR78510KSP ASP BL OFFSETR OFFSETISCISC CIRMUTEQ7222SC1815R79110KR792100R793100C7050.1uFSC-PSC-NR213R3/1W FPL21uHC2422NR203R3/1W FPL11uHC2322NR VSPQ7292SC1815D7271N4148R794220K+V34-V34MUTE-LMUTE-RPRTO CB304&CB404C2122NC2222NPRRLO2B36VRLO4B36VR795100KR7129K1 1%R796470KD7161N4148R757100KR756100KR75862K 1%R767390K 1%6784IC705ATL082BDR76420KR76512KR76920KR77012KR76610R77110Q7202SC1815Q7212SA1015+V34C76410u/50VC76910u/25V-V34V12C7671uF/50VR755220KIC705BTL082BDR752200KR743470KC7611uF/50VC7621uF/50VR75910KD7151N4148R75127K 1%R760220K123-V125R761220KQ7302SC1815R79922-V12BG_DISCR VSPISC C1VR70150KC7191N1234CB4041234CB304-V64+V64+V64R797470KTP9TP10R75410KD7146.8VC7601uF/50VD711BAV21D713BAV21R VSPD7204.7VD7194.7VD717BAV21D718BAV21C766C765V34RQ7012SD669A/KSC2690R73910PJ701+12VOUTR7011KC714100NR70268Q7022SC1815Q7002SC1815D70014VR700270R77456KR77356KC781330u/16VC7834u7/50C7820.22uR78210KR78010KR77756KC78447u/5012345678IC706uPC1237HA+V34RR77522KR77622KD7201N4148D7281N4148D72910VQ7242SA1015C78510u/50R783820R78410KR78710KR77810KR779220/3W FPR7905K1!REDGRYBLKORGVIO!P1AT2:TI-67790B: AC 230V/50HzTI-67791B: AC120V /60Hzt0AUTORESET230V/50Hz120V/60Hz0VP1BCHASSIS12345CZ7045PIN12CZ7022PIN12345CZ7035PINMAINSTANDBYP2BP2AT2!t0YELYELBLUBLUWHI123CZ711D7121N4148F701T3.15AL/250V CERL701250V/10AC7024n7/400V+5VP ON/OFFSTANDBY&!C7014n7/400VSW1!123CB711123CZ70712CB70912CZ709123CB70712CB710123CZ710!PHONE BOARDN13C372D06N13C372D11N13C372D12AC IN/OUTLETBOARDPSW BOARD12CZ706AH123CZ71212CZ713T6.3AL/250V AHPHONE BOARDR762220/2W FPJK701123CZ705PHONE SOCKETPHONE BOARDR763220/2W FPSTANDBY&PHONE BOARDN13C372D06R374100Q329A872Q330C1775R373100C30722PC302680PC30522PC3150.1uFR30222KR303100R312100R304100R31327KR30527KR314100R306100Q313NOTEQ310NOTEQ3092SA1015Q3052SA1015Q3072SA872Q3062SA872Q3012SA872Q311NOTQ3122SC1815Q3082SC1815Q3042SC1775Q3032SC1775Q3022SC1775R30833R32033R31847K MFR35910/1W FSR3151KR32382 FP 1/2WR32139KR317150/1/4W 1%R3199K1 1/2W 1%R32739KR30782R31610KR328100R3111KR31010KR326100KR324100KR30982 FP 1/2WD3031N4148D3041N4148D3061N4148D3051N4148C308N.I.Q314NOTER3303R3/0.5W FPR332330/0.5W FPR3344K7/3W FPR3383R3/0.5W FPR341330/0.5W FPR3444K7/3W FPR337100/1W FSR329100/1W FSR3314R7/FSR3394R7/FSR33633R34033L30110uHL30210uHR3451K2R3461KQ315KSC2690Q317NOTEQ3242SC5200Q3222SC5200Q318NOTER3570.05/5WR3560.05/5WR34875 1W FPR34975 1W FPR34210KR33310KC313470PC314470PQ3272SA1943Q3212SA1943D308BAV21D307BAV21C3180.1uF+V64-V64+V64-V64+V68-V680VRAR3014700VRA0VRA0VRA0VRA0VRB0VRBC30110uF/50VC30310uF/50VC30410uF/50VC3062200u/6.3VC311100UFC312100u/25VR33510KR34310KC3160.1uFC3170.1uFC3090.1uFC3100.1uF0VRA0VRAQ3262SA1015Q3252SC1815R3646K8C32110u/50VR36322KR3611KR36215KC32022ND3091N4148R36522KQ3232SA1943Q3282SC52000VRBLEFT POWER AMPR32210K 1/2W 1%L i/pGNDR367T0=80 degree C0VRB-V68+V68123456789CZ302V/I OVER 0VRB+V640VRB-V64VOP LD30218VD30118V3IC2TL4313IC1TL4311VR302500R347220Q3162SA101512345CZ304VOP LR358100 1W FPR3752K2123CZ3013PINC3240.1uFTO CB302TO CB301TP1TP3TP2TP40VRBC32210uF/50VC32310uF/50V0VRB0VRBN13C372D02ADJ DCADJ Bias DCR376220KR37782R37839KR3802.2R3822.2R3842.2R3862.2Q3192SA1943R3812.2R3832.2R3852.2R3872.2Q3202SC52000VRAL SCPL SCNL MUL SCPL SCNL MUR35122C32610uF/50VVR30150KC32510uF/50VR379180KNBNBQ337NOTEQ338NOTER3911R3881R3891R3901C3190.1uF0VRAVOP L12CB7062PINMAIN ON+5SPEAKERR474100Q429A872Q430C1775R473100C40722PC402680PC40522PC425470pFR40222KR403100R412100R404100R41327KR40527KR414100R406100Q413NOTEQ410NOTEQ4092SA1015Q4052SA1015Q4072SA872Q4062SA872Q4012SA872Q411NOTEQ4122SC1815Q4082SC1815Q4042SC1775Q4032SC1775Q4022SC1775R40833R42033R41847K MFR45910/1W FSR4151KR42382 FP 1/2WR42139KR417150/1/4W 1%R4199K1 1/2W 1%R42739KR40782R41610KR428100R4111KR41010KR426100KR424100KR40982 FP 1/2WD4031N4148D4041N4148D4061N4148D4051N4148Q414NOTER4303R3/0.5W FPR432330/0.5W FPR4344K7/3W FPR4383R3/0.5W FPR441330/0.5W FPR4444K7/3W FPR437100/1W FSR429100/1W FSR4314R7/FSR4394R7/FSR43633R44033L40110uHL40210uHR4451K2R4461KQ415KSC2690Q417NOTEQ4242SC5200Q4222SC5200Q418NOTER4570.05/5WR4560.05/5WR44875 1/2W FPR44975 1/2W FPR44210KR43310KQ4212SA1943Q4232SA1943D408BAV21D407BAV21C4180.1uF+V64-V64+V64-V64+V68-V680VRAR4014700VRA0VRA0VRA0VRA0VRA0VRB0VRBC40110uF/50VC40310uF/50VC40410uF/50VC4062200u/6.3VC411100UFC412100u/25VR43510KR44310KC4160.1uFC4170.1uFC4090.1uFC4100.1u/80V0VRA0VRAQ4262SA1015Q425C1815R4646K8C42110u/50VR46322KR4611KR46215KC42022ND4091N4148R46522KQ4272SA1943Q4282SC52000VRBRIGHT POWER AMPR42210K 1/2W 1%R i/pGNDVR40150KR46690C THERMAL BREAKERR467T0=80C POSISTOR0VRB-V68+V68123456789CZ4020VRB+V640VRB-V64VOP RD40218VD40118V4IC2TL4314IC1TL4311VR402500R447220Q4162SA10150VRA12345CZ404VOP R1234CZ401R4752K2R4718K2 1/2W 1%R4728K2 1/2W 1%Q431C2878C4240.1uFTO CB402C42210uF/50VC42310uF/50V0VRB0VRBTP7TP5TP6TP80VRBN13C372D03ADJ DCADJ Bias DCR476220KR47782C41510uF/50VR42539KR4802.2R4822.2R4842.2R4862.2Q4192SA1943Q4202SC5200R4812.2R4832.2R4852.2R4872.2C426470pFR451220VRBNB RNB RBGR SCPR SCNR MUR MUBGR SCPR SCNR450180KC41910uF/50VQ437NOTER4881R4891Q438NOTER4911R4901C4280.1uFC4130.1UFAC INAC INLET23184IC301ATL082DC3271uFR3921MR39324K0VRAVOP L-18V-18V23184IC401ATL082DC4271uFR4521MR45324K0VRA-18VVOP RR7503K3R7722K2D7401N4148R3964K7/3W FPR3954K7/3W FPR4954K7/3W FPR4964K7/3W FP+64V-64V123451234123451234R?STANDBY TRANSFORMERR33690C THERMAL BREAKERB C E2SA18372SC47931 2 3BT1511: CATHODE2: ANODE3: GATENOTE:Q310 Q311 Q313 Q314 Q317 Q318 Q337 Q338 Q410 Q411 Q413 Q414 Q417 Q418 Q437 Q438 ARE DIFFERENT FOR EACH VERSION OF C372, PLEASE WATCH THEVERSION NUMBER ON THE AMP PCB TO MAKE SURE THAT: IF IT IS V4, PLEASE REPLACE THE ABOVE TRANSISTORS WITH 2SB649A/2SD669A. IF IT IS LATER THAN V4.1, PLEASE REPLACE IT WITH 2SA1837/2SC4793.THE TRACE FOR EACH VERSION ARE DIFFERENT, DO NOT MIX THEM! S004S003C005C004C003S004S003S002C001S002S001S002S006S006S007S006S006S008S009S008F002S009F004F005F006F001F003S009F012F010F011F009F008F007S010T001R001R002R003S009F008F016F015F014F013S013S014F019F017F018F021F020F022S015C012S017C015C014S016C009C008C007C006C002C011C010C024S012C017C018C019C020S011C021C022C023C016C013M001M005M002M003M004S005S006S005EXPLODED VIEWEXPLODED VIEW PARTS LISTREF. NOPART NO.DESCRIPTIONQty.REF. NOPART NO.DESCRIPTIONQty.C00167-005010-0Transformer Shielding Box1F00776-001001-0 IR Lens1C00201-37205-10Assemblied Pre Amp Module 2F00876-003001-0 LED Lens12C00318-37371-22Transformer C Version1F00977-002002-1 Tone Defeat Button118-37371-12Transformer AH Version1F01073-014001-1 Tone Knob3C00466-005007-0Metal Disc1F01177-001001-1 Tone Control Lozenge 1C00594-005004-1Transformer Disc Label1F01273-014002-1 Volume Knob1C00666-018001-1Chassis1F01374-001002-1 Input Button (3P)3C00766-005004-0Base Cover1F01475-005001-0 Sleeve(1P)4C00875-010004-1Foot4F01501-37204-00 Assembled Key B

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