NAD-C272-cd-sm 维修电路原理图.pdf

NADSERVICE MANUAL C 272STEREOAMPLIFIERC 272STEREOAMPLIFIERRadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS STEREO MODE CONTINUOUS AVERAGE POWER = 150 W (21.8 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS (Min. power per channel, 20 Hz 20 kHz, both channels driven, with no more than rated distortion) Rated Distortion = 0.03% (THD 20 Hz 20 kHz) Clipping power = 170 W (maximum continuous power per channel). IHF dynamic headroom at 8 ohms = +2.3 dB IHF dynamic power (Maximum short term power per channel) 8 ohms: = 230 W (23.6 dBW) 4 ohms: = 410 W (26.1 dBW) 2 ohms: = 520 W (27.2 dBW) Damping factor 150 (ref. 8 ohms 50Hz) Input Impedance R = 20 kohms C = 470 pF Input sensitivity (for rated output into 8 ohms) 1.2 V0.1V Voltage gain 29 dB Frequency response 20 Hz 20 kHz 0.3 dB - 3 dB at 3 Hz/70 kHz Signal / Noise ratio, A-weighted 100 dB ref. 1 W 120 dB ref. rated power BRIDGED （MONOPHONIC）MODE CONTINUOUS AVERAGE POWER 330 W 25.2 dBW） OUTPUT INTO 8 OHMS (Min. power per channel, with no more than rated distortion) IHF dynamic headroom at 8 ohms 3 dB IHF dynamic power 8 ohms: 800 W (29.0 dBW) IHF dynamic power 4 ohms: 1200 W (30.8 dBW) DIMENSIONS AND WEIGHTS Net Weight 12.5 kg ( 27.5 Ib) Shipping Weight 14.2 kg ( 31.3 Ib) Dimension (W H D) 435 133 350 mm RadioFans.CN 收音机爱 好者资料库ALIGNMENT PROCEDURE (C272) I. INITIAL ADJUSTMENT (No load connected) A. OUTPUT OFFSET VOLTAGE 1. Connect a DC Millivoltmeter to L Channel TP2 (DC) and TP8 (GND). 2. Turn unit “ON” and adjust VR301 (100ohms) to get a reading of 0V+/-30mV. 3. Connect a DC Millivoltmeter to R Channel TP5 (DC) and TP7, then adjust VR401(100ohms) to get a reading of 0V+/-30mV reading on meter. B. IDLING CURRENT 1. Connect a DC Millivoltmeter to L Channel TP1 (IDL) and TP3 (IDL), then adjust VR302 (500 ohms) for 67.5mV reading on meter. 2. Connect a DC Millivoltmeter to R Channel TP4 (IDL) and TP6 (IDL), then adjust VR402 (500 ohms) for 67.5mV reading on meter. II. ISC ADJUSTMENT (WITH LOAD CONNECTED) 1. Connect a DC Millivoltmeter to Power Board CB725, and connect 4 ohms load to both L&R speaker output terminals. Then feed 20kHz signal to Fixed In RCA. 2. Turn unit ”ON” and try to get 15W on speaker output terminal. Then adjust VR701 (82kohms) to get a reading of 0V+/-10mV. 3. Change the load to 8 ohms and try to get 160W on speaker output terminals. Then adjust VR701 (82kohms) to get a reading of 1.4V+/-30mV. III. FINAL ADJUSTMENT Repeat procedure A and B for offset voltage and idling current alignment respectively. DRAFTC70222n/250VC70322n/250VC715C716Q703C1815Q702A1015TC701TIC116DTC702TIC116DR7071KR71322KR709100R7111KR7121KR7081KR710100R71422KR7160.025/3W 10%R717100MF 1%Q706A1015Q707A1015R7189K1MF 1%R719220K!REDGRYBLKORGVIO!H1H2L1L252.1V AC10%10%33.1V ACC70422n/100VC70522n/250V!10%10%32.5V ACC71122n/250VC71222n/250VR701R702R703R704C72122n/100VC72222n/100VC7231000u/100VC7241000u/100VR7211KR722 1KR72333/FSR7261KR7251KR7271KR730 1KR7281KR7353K31%MFR7321KR7311K8R7349K11%MFR72433/FSR7331KR73722K 1%MFC728100u/25VC73210u/100VC7334u7/100VC729100u/25VC73722u/100VC73422n100VC73147PC73047PC73522n 100VQ708KSC2690Q710C1775Q711C1775Q709KSA1220Q712A872D7031N4148D7041N4148D7061N4148D7051N4148C72547u100VC72647u/100VR736 22K 1%MFC73622u/100V!60.5V ACT701: TI-65381: AC 230VACS1ACS2+-B703DB104ACS1ACS2+-B704DB104ACS1ACS2+-B701KBU1004ACS1ACS2+-B702KBU1004C71322n/250VC71422n/250VD7021N540110A10A0.5A0.5AQ704A1015Q705C1815R71522KC717C718C719N.I.C720N.I.123478956101112T701MAIN TRANSFORMER12345CZ7025PIN12345CB7025PIN12345CZ7015PIN12345CB7015PINR720100R729100C7270.1uFUSEABLE : 4 X 1/1WAC-DETISC-CISC-S4X10000uF/80V +20%/-20%C715-C718+18VR742249R743249R7403K32R7413K32C74422u/50VC74522u/50VC74622n100VC74722n100VINIC702LM317MINIC703LM337MC74022n100VC74122n100V+18V-18VC7382200uF/50VC7392200uF/50VC74210u/50VC74310u/50VD7071N4148D7081N414812CB7032PINC7060.1u!ACS1ACS2+-B705DB104C7081000u/16VC7070.1uR70610K1456791028T702STANDBY TRANSFORMERPJ701+12V TRIGR7052K2Q701C1815123SW702AAUTO TRIG12RL701ASTAND-BYRL701B5VD7011N4148INIC7017805C7100.1uC70910uFTGND1234CZ7064PIN1234CZ706A4PIN12CZ7032PINF701T4AL/250V(CE)R738200/1W FSR739200/1W FSR740-R743=1% MFYELBLUWHIBLUYEL12CZ7042PIN+T5V+T5VTGNDR74910KD7101N4148R758100K 1% MFR75991K1% MFR75762K1% MFR756390K1% MFC75310u/25VR7541KC75010u/25VR7551KC75110u/25VIC704ATL082CPC75210u/25VR7511MIC704BTL082CPR74527K MFR7521MC7481u/50VC7491u/50VR75010KD7111N4148R746270K 1% MFD7121N4148R748100KR753100K1% MF-18VD7091N4148-18V+18VISC-SISC-CR77256KR77356KC758330u/16VC7564u7/100VC757220n/63VR76410KR76956KC75547u/50V12345678IC705uPC1237HA+V34R77122KR77022KD7191N4148D71810VQ715A1015C75410u/50VR76222KR76310KR76510KR76810KD7131N4148RL702B36VR766220/2W FPL-OUTR-OUTR7675K6+V34PROTECT-IPT-OUTAC-DET+5V12CB7072PIN12CB7082PINLAG1G2RALBG3G4RBCB715BINDING POSTS12RL702ARL-LCH12RL703ARL-RCH12345678CZ709A8PIN12345678CZ710A8PINC75922n100VC76022n100VC7612n2C7622n2L-OUTR-OUT+64V-64V123SW704ABG-SIGNALPROTECT-I123SW703ASOFTCLIP101112SW704DBRIDGE123CZ7113PIN+18VR779 10KR77710KR7744K7D722 1N4148D7211N4148D7201N4148R775560R778 4K7R7760Q716C1815Q717C1815123CZ7123PIN+18V+18VPT-OUT456SW702BAUTO TRIG+5VQ714C1815Q713C1815R76122KR76022KPROTECT-TPROTECT-TISC-CR783 25KR782 25KR785 1KR784 1KR7811KR7801K+68V-68VC76410u/25VC76310u/25VD71424VD71524V456SW703BSOFTCLIP+64V-64V+18V+68V-68VR744100Q718C1815R78622KD7161N4148+18V-18VC270 STANDBY BOARDLOUTGND+64V-64V-64V+64VGNDROUTMUTE-LMUTE-RPOS90POS90POS80POS80SC-PSC-PSC-NSC-NOVERI-SOVERI-S-68V-68V+68V+68VBG-OBG-S12CZ714A2PINBG-G456SW704BBG-GND12CZ713A2PINLINGND123456789CZ619PINR6121KC62100PR62220 MFR642.2MMFQ622SK369R681K MFR610100/MFQ652SA970AQ682SD667AQ662SB647AD631N4148D641N4148C6439PR62010/MFC680.1uC670.1uMGND123456789CB619PINMLO+18VLOUTLIN-LIN+GNDRIN+RIN-ROUT-18VR61847/MFR6160R61410KMGND+18M-18MMGNDMLOMROR621N.I.C611N.I.MR-FBC270-INPUT BUFFERR66N.I.1% MFC61047PR6111KC61100PR61220 MFR632.2MMFQ612SK369R671K MFR69100/MFQ632SA970AQ672SD667AQ642SB647AD611N4148D621N4148C6339PR619 10/MFC660.1uC650.1uMGNDMROR61747/MFR6150R61310KMGND+18MR65N.I.1% MFC6947PMR-FB-18MML-FBML-FB-18MRINGND2SA1943BCE2SA19432SA8722SA10152SC1815A872E C BB649TL431LM317:R A KE C BTL4312SB6492SD6693:INLM337:1:ADJUST,2:IN,1 2 3LM7805LM7805 1:IN2:GND,3:OUT2SC5200R101220 MFC101100PR1022M2RCA1AFIXED-LR201220 MFC201100PR2022M2RCA1BFIXED-R123SW705AF/V SW456SW705BF/V SWR103220 MFC102100PR1042M2RCA2AVARI-LR203220 MFC202100PR2042M2RCA2BVARI-RA1RV1A1KA2RV1B1KR1050R2050C10310n63VC20310n63VC104100uFC204100uF123CZ301A3PIN123CZ401A3PIN+18V-18VC10510uFC20510uF789SW705CF/V SW101112SW705DF/V SWBUF-RBUF-R1 2 3LM317LM3371:ADJUST,2:OUT,3:OUT2.5Vref+-Reference(R)Cathode (K)Anode (A)123KSC2690TL431B647E C B2SB647A2SD667AC6130.22uC6120.22uC76522u/50VR50R60C5N.I.C6N.I.P15 LOUTP16 SGNDP7-64VP9PGNDP11 +64VP13 LOUT+64V-64VP17 ROUTP18 SGNDP8-64VP10 PGNDP12 +64VP14 ROUTC7664n7/400VGNDK A GTIC116DTIC116D2SA970GNDGNDC76710u/25VD7231N4148R788100K1% MFR-OUTL-OUTD7241N4148R789270K 1% MFRL703B36VR7902K2+18V!R791100KR7922KR793560C40722P/500VC402220PC40522P/500VC4150.1uR40222KR403100 MFR412100R404100R41339KR40539KR414 100R406 100 Q4132SB649AQ4102SB649AQ4092SA1015Q4052SA1015Q4072SA872Q4062SA872Q4012SA872Q4112SD669AQ4122SC1815Q4082SC1815Q4042SC1775Q4032SC1775Q4022SC1775R40833R42033R41847K1%MFR459 10/1W FSR4603R3/1W FPR4151KR423100 MF 1%R4211K MF 1%R417150 1%R41910K0.5W 1%MFR42739KR407910 MF 1%R41610KR428100 MFR4111KR41010KR426100KR424100KR409100 MF 1%D4031N4148D4041N4148D4061N4148D4051N4148C408100PQ4142SD669AR4303R31W FPR4325101W FPR4342K23W FPR4383R31W FPR4415101W FPR4442K23W FPR437 1001W FSR429 1001W FSR4314R7 FSR4394R7 FSR43633R44033L401 10uHL402 10uHR4451K2R446820Q415KSC2690Q4172SC4937Q4222SC5200Q4202SC5200Q4182SA1837R4500.21W FSR4520.21W FSR4510.21W FSR4530.21W FSR4570.055WR4560.055WR448751W FPR449751W FPR44210KR43310KC413470P500VC414470P500VQ4192SA1943Q4212SA1943D408BAV21D407BAV21C4180.1u100VL403 1uHR401470/MFR-FDBKC40110uFC40310uF/25VC40410uF/25VC4062200u/6.3VC411100uFC412100u/25VR435 10KR44310KC4160.1u100VC4170.1u100VC4090.1u100VC4100.1u100VQ4262SA1015Q425C1815R4646K8C42110u50VR46322KR4611KR46215KC42022n100VD4091N4148R46522KR4540.21W FSQ4232SA1943Q4242SC5200R4550.21W FSR422 9K10.5W 1%MF12CZ4012PIN1VR401180R466t=90 CR467t=80 CRSCNR-FDBKD40218VD40118VIC402TL431IC401TL4311VR402500R447220Q416A1015TP4IDLING-ITP5OFFSETTP6IDLING-IR4680.21W FSQ4272SA1943Q4282SC5200R4690.21W FS-V64R+V64R12CZ7082PIN12345678CZ7108PIN-64V+64VGNDROUTMUTE-RPOS90POS80SC-PSC-NOVERI-S-68V+68VGNDBG-SRSCNRSCPR-MUQ4292SC1775Q4302SA872-V68R+V68RR425 100R470 100RSCP+V68R-V68R+V64R-V64RR471 2K2R-MUR4728K2R358100/0.5W MF123CZ7143PINBG-GBG-GBG-SBG-SBG-GC30722P/500VC302220PC30522P/500VC3150.1uR30222KR303100 MFR312100R304100R31339KR30539KR314 100R306 100 Q3132SB649AQ3102SB649AQ3092SA1015Q3052SA1015Q3072SA872Q3062SA872Q3012SA872Q3112SD669AQ3122SC1815Q3082SC1815Q3042SC1775Q3032SC1775Q3022SC1775R30833R32033R31847K 1%MFR359 10/1W FSR360 3R3/1W FPR3151KR323100 MF 1%R3211K MF 1%R317150 1%R31910K 0.5W 1%MFR32739KR307910 MF 1%R31610KR328100 MFR3111KR31010KR326100KR324100KR309100 MF 1%D3031N4148D3041N4148D3061N4148D3051N4148C308100PQ3142SD669AR3303R31W FPR3325101W FPR3342K23W FPR3383R31W FPR3415101W FPR3442K23W FPR337 1001W FSR3291001W FSR3314R7/FSR3394R7/FSR33633R34033L301 10uHL302 10uHR3451K2R346820Q315KSC2690Q3172SC4793Q3222SC5200Q3202SC5200Q3182SA1837R3500.21W FSR3520.21W FSR3510.21W FSR3530.21W FSR3570.055WR3560.055WR348751W FPR349751W FPR34210KR33310KC313470P500VC314470P500VQ3192SA1943Q3212SA1943D308BAV21D307BAV21C3180.1u100VL303 1uHR301470/MFL-FDBKC30110uFC30310UF/25VC30410uF/25VC3062200u/6.3VC311100uFC312100u/25VR335 10KR34310KC3160.1u100VC3170.1u100VC3090.1u100VC3100.1u100VQ3262SA1015Q325C1815R3646K8C32110u50VR36322KR3611KR36215KC32022n100VD3091N4148R36522KR3540.21W FSQ3232SA1943Q3242SC5200R3550.21W FSR4588K2R322 9K10.5W 1%MF12CZ3012PIN1VR301180R366t=90 CR367t=80 CLSCNL-FDBKD30218VD30118VIC302TL431IC301TL4311VR302500R347220Q316A1015TP1IDLING-ITP2OFFSETTP3IDLING-IR3680.21W FSQ3272SA1943Q3282SC5200R3690.21W FS-V64L+V64L12CZ7072PIN12345678CZ7098PIN-64V+64VLOUTMUTE-LPOS90POS80SC-PSC-NOVERI-S-68V+68VBG-OLSCNLSCPL-MUQ3292SC1775Q3302SA872-V68L+V68LR325100R370100LSCP+V68L-V68L+V64L-V64LR3712K2L-MU12CZ7132PINGNDGNDC32210u/100VC31910u/100VC42210u/100VC41910u/100VTP8GNDTP7GNDC3230.1u100VC4230.1u100VQ431C28781%1%R79710KB-B-12CB716M-TEST12CB717M+TEST1VR70182KR-OUTL-OUT12CZ7182PIN12CZ7192PIN12CB7192PIN12CB7182PIN123CB72068VTEST+68V-68V123CB72318VTEST+18V-18VT6.3AL/250V(AH)123CB724N/ATGND12CB725PTEST789SW704CBRIDGE12CZ7052PINGNDROUT12CB7052PINR747470K-18VNOTE:1. RESISTORS ARE CARBON FILM 1/4W 5% UNLESS SPECIFIED. FP - FLAME PROOF 5%. FS-FUSIBLE 5% MF - METAL FILM 5%. CE-CERAMIC CASE 5% 2. ALL CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 20%3. COMPONENTS WITH N.I. MEANS NOT INSERT.4. COMPONENTS WITH * ARE ADJUSTABLE PARTS.5. COMPONENTS WITH ARE SAFETY CRITICAL PARTS.!12345CZ705230V120VC272NAD ELECTRONICS INTERNATIONALDocumentSheet:Date:Date:Date:DraftedPL CheckedApprovedby:by:by:Number:REV.DateECN No.DESCRIPTIONAPPRO.Project:State:PTA Checkedby:Date:HS4_C272_B007 V3.0-MAIN.schTRIG OFFR7992.2KCHANGE R744 TO 100 ADD R799 1/4W 2K DRAFTCIN11COUT9COUT10RST12Q47Q55Q64Q76Q814Q913Q1015Q121Q132Q143VCC16GND8U801CD4060CLK11D12SD10CD13Q9Q8U803B74HC74CLK3D2SD4CD1Q5Q6714U803A74HC7489U802D74HC141011U802E74HC1412714U802A74HC1434U802B74HC1456U802C74HC141213U802F74HC14R80210KQ8012SC1815R80310KR80410KR810100KR814200KR8012MR80510KR80610KR80710KR8131MR811100KR80810KR80910KR81610KR81510KR81710KR81910KR81810KQ8022SC1815Q8032SC1815C8030.1uFC8072.2uFC8060.1uFD8011N4148R8121MC8020.1uF+5V+5V+5V+5V+5V+5VC8010.1uFC8050.1uFC8040.1uF123456CZ8046PIN123CZ8013PIN+5V1234CZ8024PIN1234CZ8034PIN+5VOUTPUTIN SENSETRIG IN312Q8042SA1015HS4_C272_B007 V4.0-ATO.SCHC272R9011MR9021MR91010KR90730MR90910KR9111MC90610pFC904100nFC9090.1uF12D9031N414812D9041N414812D9051N414812D9061N414812D9011N414812D9071N414812D9111N4148+5V+5V+5VC901100nFC903100nFC905100nFC902100nFR90830MC90710pF12D9081N414812D9091N414812D9101N414812D9121N414812D9021N414812D9131N4148R906100KR903100KR905100KR904100K32184U901ALF353567U901BLF35312C908100nF123CZ9013PIN123CZ9023PINS_LCHS_RCH123CZ9033PIN134256S901Q9012SC1815GRR913100kR912100k+5V12C910100n1233PIN1233PIN1234566PINR11010R110247LED1106LED1105R11051KR11041KSCBG+18VAGNDLED1104LED1103LED1102Q11032SA1015Q11022SA1015Q11012SA1015R1103510TS1101GND+5VTSLED_SENSELED_TRIGLED_TSGREENGREENGREENGREENAMBERGREEN/AMBER/REDINSENSE BORADATO BORADTACT SWITCH&LED BORADLED1101PWRTO MAIN BOARD CZ712TO MAIN BOARD CZ711TO STANDBY BOARD CZ706 TO MAIN BOARD CZ706A 123CB9013PIN123CB9023PINTO MAIN BOARD CZ61 PIN4TO MAIN BOARD CZ61 PIN6123CB9033PIN123CB903A3PINP1001AC INLET12CZ10012PIN12C10014.7nF1000V12CB10012PIN123CB1101A3PIN123CB1102A3PIN12CB1001A2PIN1234CB8024PIN1234CB8034PIN123456CB8046PIN1234CB803A4PIN1234CB802A4PINTO STANDBY BOARD CZ704AC INPUT BOARDTO STANDBY BOARD CZ705123CZ10022PIN123CB10022PIN12C912220uF/16VR91410K12C911220uF/16VADD R914,C808,C911,C91212C808220uF/16V123CZ10032PIN123CB10032PIN12345CB7055PINS1001ROCK SWITCH123CB10022PIN12345CB7055PIN(AH VER.)(C VER.)TO MAIN BOARD CZ61 PIN5TO MAIN BOARD CZ61 PIN5PN U1 CHANGED TO U801NAD ELECTRONICS INTERNATIONALDocumentSheet:Date:Date:Date:DraftedPL CheckedApprovedby:by:by:Number:REV.DateECN No.DESCRIPTIONAPPRO.Project:State:PTA Checkedby:Date:C8090.1uF100VADD 0.1uF CAP FROM TRIG IN TO GNDR819 CHANGED TO 10KC022V1-01303-12-10V3.7WIRING DIAGRAMF001F002F003F004F005F006F007F008F009C001C002C003C004C005C006C007R002R003R001C008C016C010C009C011C012C015C014C013C017C018R006R004C020C021C022C019C023C024C025C026C027C028C029C030C031C032C033C034C035C036C037C038C039T001C041S001S002S001S001S001S001S001S001S003S003S004S005S006S007S008S009S009S010S011C040S012S014S014S013S015S014S013S015S005S005S001S005S001S002S001S002S005R005EXPLODED VIEWREF.NO PART NO.DESCRIPTIONQty.REF.NOPART NO.DESCRIPTIONQty.C00166-026002-1Chassis1F00167-026001-0Fascia1C00266-005004-0Base Cover1F00267-018001-0End Cap L1C00375-010004-1Foot4F00367-018002-0End Cap R1C00478-001002-0Foot Pad4F00476-003001-0LED Lens6C00566-005006-0BDP Support1F00577-026002-0Power Button Bezel1C00669-006003-0Copper Slot1F00677-026001-0Power Button1C00766-006001-0Bus Bar2F00775-005001-0Sleeve5C00870-002004-0Module Support 21F00816-27209-00LED&Ttact Switch Board 1C00975-003004-0Module Lid1F00966-026001-0Subfascia1C01073-003001-0Rotate Knob1C01169-002004-0BDP Pin 4C01269-005006-0BDP Pin 4R00167-026003-0Rear Panel (AH)1C01311-05202-01Slide Swich267-026002-0Rear Panel (C)1C01411-05202-00Slide Swich2R00216-27205-00Insense Board1C01517-07001-00Trigger In Socket1R00311-05202-00Slide Switch1C01617-01002-01RCA2R00466-010010-0L Type Bracket2C01716-27010-00Main PCB1R00517-07102-00AC Inlet1C018Binding Post8R00616-27207-00AC Input Board1C01970-005005-0Heat Sink2R00711-01101-02Rock Swich1C02070-026004-1Heat Sink 2b2C02170-026005-1Heat Sink 1a1C02270-026002-1Heat Sink 22T00167-018004-0Top Cover1C02370-026001-1Heat Sink 1b2C02470-026003-1Heat Sink 2a1C02585-005001-0PC Spacer8S00161-023106-0Self Taping Screw STB3x650C02616-27020-00Amplifier PCB2S00261-023108-0Self Taping Screw STB3x822C02716-2704