NAD-C372-int-sm 维修电路原理图.pdf
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1、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
2、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
3、 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. FIN
4、AL 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 B2SB6492SD669PORT2/0PORT2/1PORT2/2PORT2/3PORT2/4PORT2/5PORT2/6PORT2/7V
5、CCXTAL2XTAL1PORT3/1PORT3/2PORT3/3PORT0/0PORT0/1PORT0/2GND123456789101112131415161718Z86C0812PSC1234567891011121314GNDVCC74LS00IC902:QP0 QP1 QP2 QP3 QP4 QP5 QP6 QP7123456789101112131415168-STAGE SHIFT REGISTER8-BIT STORAGE REGISTER3-STATE OUTPUTSDCPSTROEQS1QS2VCCGNDCD40942SA8722SA10152SC1815A970E C B
6、K369D G S2SK369S G VIS1U621LR103470 MFR105470 MFC102100pC103100pR107470 MFR109470 MFR111470 MFC104100pC105100pC106100pR113470 MFR115470 MFR118470 MFC107100pC108100pC109100pR1161MR1141MR1121MR1041MR1061MR1081MR1101M654RL6B654RL7B654RL8B654RL9B654RL10B654RL11B654RL12BRCA1CCDRCA1EVIDEORCA2AAUXRCA2CTUNE
7、RRCA3AREC2RCA3CTAPE1RCA3EREC1RCA2ETAPE2RCA4APREOUT1RCA4BPREOUT 1RCA4EPREOUT 2RCA4FPREOUT 2R203470 MFR205470 MFC202100pC203100pR207470 MFR209470 MFR211470 MFC204100pC205100pC206100pR213470 MFR215470 MFR217470 MFC207100pC208100PC209100PR2161MR2141MR2121MR2041MR2061MR2081MR2101M321RL6A321RL7A321RL8A321
8、RL9A321RL10A321RL11A321RL12ARCA1DCDRCA1FVIDEORCA2BAUXRCA2DTUNERRCA3BREC2RCA3DTAPE1RCA3FREC1RCA2FTAPE2R119220 MF12345678910M102C372 PREAMP MODULE+V34R120100C2118.2PR219220 MF-V3412345678CB5018PINL buff outR buff outGND+34V-34VLoutGNDRout+V34-V34C21222NPEC213220uC214220PR22375/FS 0.5WR22222K654RL2BA2R
9、V5B1KC215220PRCA4DMAIN LINRCA4CMAIN RIN12345CB3015PIN123456CB4016PINR753100C78610n/63VTO LEFT POWER AMPTO RIGHT POWER AMPRCA1BDISCRCA1ADISCR101470 MFC101100pR1021M654RL5BR201470 MFC201100pR2021M321RL5AC11122NPEC112220uC113220PR12475/FS 0.5WR12322K321RL2AB1A1RV5A1KC114220PR1171MR2181M456SW2BSOFTV34RC
10、LLEDBRIDGELED8RL5C12V8RL6C12V8RL7C12V8RL8C12V8RL9C12V8RL10C12V8RL11C12V8RL12C12VD7301N4148D7311N4148D7321N4148D7331N4148D7341N4148D7351N4148D7361N4148V5IR INIR out+12VTAPE1TAPE2TUNERAUXVIDEOCDDISCA SPEAKER ONIRMUTEB SPEAKER ONMAIN ON789SW3CBRIGDE12345678910CB90610PIN12345678910CB90710PIN+12VR126100K
11、R226100KV34RPRIRMUTE+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%A2RV1B10KAA2RV2B10KAC607
12、22n 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% MFR609
13、590 1% MFMD1CR5232K2R5212K2R5252K2R5202K2R5242K2R5222K2C5204u7C5214u7Q502C1815Q501A1015Q504C1815Q503A1015MOTORMVOLUME CONTROL5V1234CB5024PINVOL-DNTONE-LINC60210nC50210n+34V-34V+34V+34VTONE&VOL BAL456SW4BDEFEAT123SW4ADEFEATC5220.1u-34VR51310MR5141.6 MFR6141.6 MFR51510KR61510KQ8042SK209R81018KR8011KR8
14、0810R80410R8021KR8051MR806 430R8091KR8031K5R807560Q8062SA1225Q8012SA1312Q8022SC3324Q8052SC3324Q8032SC2983C8021NC80147pFQ8092SK209R81818KR8111KR82010R81910R8121KR8141MR815 430R8171KR131K5R816560Q8122SA1225Q8072SA1312Q8082SC3324Q8102SC3324Q8112SC2983C8041NC80347pF12345678910P80110PINVEEVCCVCCVEEVCCVEE
15、R821220C80522pC80822pR822220C8060.1uFC8070.1uFC8090.1uFC100.1uF123SW3A456SW3BR1110K+12VR1222KR1310K-V34PRSP BSP AMAIN ONBG_OBG_IBG_SBG_OBG_IBG_SJIRAIR INJIRBIR OUTSTR1D2CLK3OE15Q14Q25Q36Q47Q514Q613Q712Q811QS9QS10VCC16GND8IC9054094STR1D2CLK3OE15Q14Q25Q36Q47Q514Q613Q712Q811QS9QS10VCC16GND8IC9044094C90
16、220PC90320PX90112MHzC9010.1uC9150.1u+5VCVITUAUT2T1DILD902CDLD904AUXLD901DISCLD905TUNERLD903VIDEOLD907TAPE1LD906TAPE2R9244K7R9031KR9232K2Q913A1015P241P252P263P274VCC5X26X17P318P329P3310P0011P0112P0213GND14P2015P2116P2217P2318IC902Z86C0812PSCQ901C1815Q902C1815Q903C1815Q904C1815Q905C1815Q906C1815Q907C1
17、815R9224K7R9204K7R9184K7R9164K7R9144K7R9124K7R9104K7C90610nC90710nC90810nC90910nC91010nC91110nC91210nCVITUAUT2T1DICDVIDEOTUNERAUXTAPE2TAPE1DISCCDVIDEOTUNERAUXTAPE2TAPE1DISCR9094K7R9114K7R9134K7R9154K7R9174K7R9194K7R9214K7R93910KR90610KR94010KGREENGREENGREENGREENGREENGREENGREENR935100R936100R93710K81
18、23456712111091314IC90174LS00+5V+5V+5V+5VR92510K+5VV34R+12VK907VIDEOK906AUXK904TAPE2K905 CDK903TAPE1K901DISCK902TUNERVSGIC903IS1U621LC90410u+5VK908BR9306K8R9332K2R9280Q910C1815LD911BRIDGELD912SOFTLD909BAA SPEAKER ONA SPEAKER ONMUTE blinkV34RA SPEAKER ONTAPE1TAPE2TUNERAUXVIDEOCDDISC+5VREMOTEREMOTECONT
19、ROLLERKEYBOARDB SPEAKER ONIRMUTEB SPEAKER ONBLD908AB SPEAKER ONQ908C1815R9084K7C91310nR9074K7Q909C1815R9044K7C91410nAR9054K7BRLEDCLLEDIRMUTEB BRLEDCLLEDPRPRK909A1593BLINK+5VR927330R934820Q912C1815D9091N4148D9121N4148LED910LED2GRNREDGRNIR OUTIR IN+5VIR OUTIR IN+12VD9076V8+12VR92922KLED BOARDP ON/OFFD
20、9081N4148D9061N4148D9101N4148D9111N4148P12VTO PHONE BOARD CZ70612345678910CZ90610PIN12345678910CZ90710PIN1234CZ5024PINV34RQ914C1815R94110KR9434K7P ON/OFFR9442K2R9452K2Q916C1815R901200R9001K+5VR9021KQ915A1015+5V+5VNC1NC2NC3Vss4SDA5SCL6NC7Vcc8IC90624C00R93110K+5VC90547uF/25VR938330R92622R798330R61015K
21、R51015KR121562R221562/2SD1815/2SD1815/2SB1215/2SB1215C372 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 E2SC
22、52002SA8722SA10152SC1815A872E 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/250VC724C727Q7042SC1815Q7032SA1015D702BT151-500RD703BT151-500RR7031KR71522KR706100R7081KR7041KR7051KR707100R70922K
23、R7100.025/3W 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/50VD7091N41
24、48D7101N4148C72022n/100VC72122n/100VR7461/1W FSR7471/1W FSR7481/1W FSR7491/1W FSC73222n/100VC73322n/100VC7341000u/100VC7351000u/100VR7161KR7171KR72233 FSR7191KR7181KR7201KR7241KR7211KR73010KR7261KR7253K3R72810KR72333 FSR7271KR72922KC738100u/16VC74210u/100VC7434u7/100VC739100u/16VC74722u/80VC74422nC7
25、4147PC74047PC74522nQ7092SD669A/KSC2690Q7102SC1775AQ7112SC1775AQ7122SB649A/KSA1220Q7132SA872D7051N4148D7061N4148D7081N4148D7071N4148C73647u100VC73747u/100VR73122KC74622u/80V+V34+V68-V6861.5V ACQ7142SC1775AQ7152SD669A/KSC2690R7366K2R7373K9R738270/2W FP+V34V34R+12VACS1ACS2+-B705DB104ACS1ACS2+-B706DB104
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- NAD-C372-int-sm 维修电路原理图 NAD C372 int sm 维修 电路 原理图