NAD-C375BEE-int-sm 维修电路原理图.pdf

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1、LAUNAMECIVRESLAUNAMECIVRESC375BEE C/AH? NAD 2010NAD ELECTRONICS INTERNATIONALTORONTOC375BEEHA/C STEREO INTEGRATED AMPLIFIERC375BEEHA/C STEREO INTEGRATED AMPLIFIERSTEREO INTEGRATED AMPLIFIERRadioFans.CN 收音机爱 好者资料库CONTENTS FRONT PANEL/REAR PANEL VIEW? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

2、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?3 SPECIFICATIONS? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 4 ALIGNMENT PROCEDURE/ALIGNMENT POINTS? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 5-7 WIRING DIAGRAM? ? ? ?

3、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?8 SCHEMATIC DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?9-18 PCB LAYOUT? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

4、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 19-27 ELECTRICAL PARTS LIST? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?28-48 EXPLODED VIEW? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

5、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 49 EXPLODED VIEW PARTS LIST? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?50 PACKING DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 51VERSIO

6、N HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 SERVICE SAFETY PRECAUTIONS 1. Replacing the Fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. REFERENCE NO. PART NUMBER DESCRIPT

7、ION Rear Panel AH A20-12103-00 Littelfuse618 T10AL/250V C A20-12702-20 Littelfuse618 T5AL/250V STANDBY Board F401 A20-12102-00 Littelfuse618 T1AL/250V NOTE: *AH : North American version only *C : European version only 2. Safety-check out (North American model only) Before returning the product to th

8、e customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit. Parts marked with the symbol are critical with regard to the risk of fire and electric shock.Replace only parts recommended by the manufacturer. - 2 -RadioFan

9、s.CN 收音机爱 好者资料库? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?module? non-service-part? ? ? ? ? ? ? ? ? ? ? ?- 3 - PREAMPLIFIERS SECTION THD(2V in 2V out,CCIF IMD,DIM 100) 102 dB S/N re 2V output, max volume 110 dB S/N re 100mV o/p (unity gain) 92 dB Channel separation 1KHz 80 dB 10KHz 70 dB Input impedance 100

10、kohms+320pF Max input, 0.1% thd 8 V rms Output impedance pre out 75 ohms Output impedance variable out 325 ohms Output impedance tape out source Z + 1k ohms Input sensitivity for 500mV out 158 mV Frequency response 20-20k tone defeat on +/- 0.1dB tone defeat off 10 V Max output 600 ohm,s load 10V To

11、ne controls Bass at 100Hz +/- 8 dB Treble at 10KHz +/- 5dB POWER AMPLIFIERS SECTION Continuous average power , stereo,8 and 4 ohms at rated thd ,20-20k 150W Continuous average power 8 ohms , bridge mode 330W Rated thd, 20-20k, SMPTE and CCIF IMD, DIM 100 170W IHF dynamic power 8 ohms 250W IHF dynami

12、c power 4 ohms 410W IHF dynamic power 2 ohms 600W IHF dynamic power 8 ohms(Bridge Mode) 800W IHF dynamic power 4 ohms(Bridge Mode) 1200W Peak output current 1msec, 1 ohm 50A S/N A wtd re 1 W 102 dB S/N A Wtd re 150W 123 dB Damping factor ( re 8 ohms, 50 Hz and 1kHz) 200 Frequency response 20-20k 85

13、dB 10kHz 75 dB Trigger out Output resistance 120 ohms Output current 50mA Output voltage +12V OVERALL CD In Speaker Out THD 20-20k, CCIF IMD, DIM 100 , 0.25W to rated power 94dB S/N A wtd re 150W ( volume set for 2V input) 113 dB Frequency response 20-20k Tone defeat in 80 dB 10KHz 70 dB Rated power

14、 ( 230 or 120 V AC 50.60 Hz) 290 W Standby power 1W Idle power 120W Net weight 15.3 kg Shipping weight 18 kg Dimensions 435x133x352 mm - 4 -SPECIFICATIONSA. DC OFFSET VOLTAGE The DC OFFSET between OFFSET Test Point and AGND must be within 0+/-20mV. B. IDLING CURRENT The idling current in the output

15、stage of the poweramp should be set to 30mA+/-5mA per pnp-npn transistor pair (This means the mid point voltage is 6.6mV with down limit of 5.5mV and up limit of 7.7mV). The alignment procedure is: At first, adjust RV102 (Markedas “Idling Current ADJ” in the drawing page 6) for a voltage of 6.6mV +/

16、- 1mV between Test point 1 and 2. Then preheat the unit for 1 minutes, let idling current settled and then readjust to 6.6mV +/- 1mV. This is a no-load adjustment. Pls note: Though the idling current is set as 6.6mV +/-1mV during the adjustment, due to the influence of varied ambient temperature and

17、 mains voltage etc., the idling current will drift after some time. During the normal checking of idling current in the service field, its acceptable as long as the voltage is in the range of 5.5mV7.7mV. C. ISC SENSITIVITY The ISC sensing voltage can allow 0mV+/-50mV. But, for the alignment process

18、in our factory, we tighten the limit to 0mV+/-10mV. That is to adjust Pot RV103 (as marked as “ISC SENS ADJ” in the drawing page 6) to get a voltage between the “ISC SENSE TEST POINT” and AGND to be 0mV+/-10mV. D. MINIMUM VOLUME LEAKAGE CANCELLATION The volume control, 20k potentiometer has a finite

19、 end stop resistance, variable and about 7 ohms max, so at minimum volume there is some signal leakage to pre out, appearing 29 dB higher at poweramp out. The cancellation circuit applies a fraction of the signal to the negative input of the line out amp to cancel this leakage. The alignment procedu

20、re is: feed 1KHz/2V signal in CD. Set volume for 10V speaker out as 0 dB reference. Then set vol to minimum. Adjust RV307 (Marked as “LEFT MIN. LEAKAGE ADJ” in the drawing page 7) for a minimum at left speaker out, the reading should be -86 dB, or 0.5mV. Adjust RV308 (Marked as “RIGHT MIN. LEAKAGE A

21、DJ” in the drawing page 7) for a voltage minimum at right preout, the reading should be -86 dB or 0.5 mV. E. FREQUENCY RESPONSE The frequency response should be set to 0+/-0.3dB. The alignment procedure is: Disable tone defaet first, feed 1KHz/2V to CD, Adjust Preout to 500mV as 0dB reference level.

22、 Change to 20Hz and set RV305 (Marked as “LEFT FREQUENCY RESPONSE ADJ” in thedrawing on page 7) to within +/-0.1dB. Then repeate the above for the RHC, adjust RV306(Marked as RIGHT FREQUENCY RESPONSE ADJ” in the drawing below) to within +/-0.1dB. - 5 -ALIGNMENT PROCEDURE?- 6 -ALIGNMENT PROCEDURE?!?#

23、- 7 -ALIGNMENT PROCEDUREP300LEFT POWERAMP BOARDRIGHT POWERAMP BOARDTO P201BPAD6 PAD5PAD2PAD3PAD4PAD1P401P402FROM PAD1-6FROM P203AFROM P211AFROM P209ATO LEFT P101BTO LEFT P103BTO P901BTO L&R P102BFROM P504AFROM P503ATO P205BTO P302BFROM P501ATO P402BFROM P502AFROM XFORMERFROM XFORMERFROM XFORMERFROM

24、XFORMERFROM P301ATO P202BTO STAR GNDTO P208BFROM P801AFROM REAR PANEL L&NTO P204BFROM P701AFROM P300TO RIGHT P103BTO RIGHT P101BFROM P212AFROM P210AFROM P203AMAIN BOARDBINDING POST BOARDRS232 BOARDHEADPHONE BOARDSTANDBY BOARDDISPLAY BOARDTONE BOARDTO EXTEND MODULEP404BP404BAC INLETAC INLET12J701J701

25、P212AP212AP504AP504AP103BP103BP203AP203AP205BP205BP801AP801AP209AP209APOWER SWITCHPOWER SWITCH12P210AP210AP102BP102BJ402J402P502AP502AP211AP211AP206BP206BP501AP501AG2G1G2G1P402BP402BP302BP302BP101BP101BP901BP901BP202BP202BP301AP301AAC OUTLETAC OUTLETP208BP208BP103BP103BP213BP213BP701AP701AP207BP207B

26、P503AP503AP101BP101BP102BP102BJ401J401P403BP403BP201BP201BP204BP204BP214BP214B- 8 -WIRING DIAGRAMFROM XFORMER (MDC 8.8V VERSION)P217BISCBIRIDGESCN/MUTEGNDOUTINPROTECTFBTP2SCPO/P-15VVCC+80VVSSVCC-80V+15V-15V-15VVCC+15V+15V-15V+15V+80V-80V111/5W/5W/5W/5WTO MAIN BOARD/1%/1KV/100V/1W/1/4W/100V/1W/1%/1W/

27、1%/1W/1%/1%/1/2W/1%/1W/1%DC SERVO/100V/3W/1W/1%/1KVTO MAIN BOARDAll Polyester capacitors are 63V 10% unless noted.All Elec. capacitors are 50V 20% unless noted.All Resistor are 1/6W 5% RJ13 unless noted.All Zener diode are 1/2W unless noted.ISC COMPARATOR/3W/3W/1%/1KV/1KV/1KV/25V/25V/1/2WMPSA42MPSA9

28、2bceMPSA06MPSA562SA21212SC5949KSA1220AKSC2690Abcebcebc/1/4We/1/4W/1/4W2SA1013/1/4W/1/4W2SC2383/1/2W/100V/1KV/1KV/5W/1KV/1%/1/4W/1%/3W/1%TO MAIN BOARDcbe/1/2W/5W/1/4W/1/2W/250V/1%/3W2SA9702SA10152SC18152SC2240TEST POINT/5W/1KV/1/4W/100V/1%/100V/1KV/1%/250V/5W/100V/100V/1KV/1KVQ152 mount tomain heatsi

29、nk/2W/1%/1%/1%/1%C138220pFC138220pFD1161N4148D1161N4148C151100nFC151100nFR13936KR13936KR195100R195100P102B5PIN2.54-CP102B5PIN2.54-C12345R1720.22R1720.22R19410R19410+C10710uF+C10710uFD122N.I.D122N.I.R18622KR18622KR1G31KR1G31KR1E4100R1E4100R191100R191100C11247pFC11247pFR199220R199220Q1442SC5949Q1442SC

30、5949R107100R107100Q1112SA970Q1112SA970R12082R12082C12222pFC12222pFC102100nFC102100nFR103549R103549+C15747uF+C15747uFR11624KR11624KR1730.22R1730.22Q136KSC2690AQ136KSC2690AR1352.2KR1352.2KD1171N4148D1171N4148R1541.2KR1541.2KR16233R16233R11239KR11239KD1031N4148D1031N4148+C13047uF+C13047uFR1A6100KR1A610

31、0KC155100nFC155100nFC12322pFC12322pF+C14310uF+C14310uFD1141N4148D1141N4148D1301N4148D1301N4148R18347KR18347KR1A124.3KR1A124.3KQ1052SA1015Q1052SA1015D1271N4148D1271N4148Q133KSC2690AQ133KSC2690AR160100R160100R1691R1691R11482R11482C135100nFC135100nFCWRV10310KCWRV10310K132R1322.2KR1322.2KQ1412SA2121Q141

32、2SA2121C127100nFC127100nFR1F64.7megR1F64.7megR1413.9KR1413.9KQ1482SC2240Q1482SC2240R12910R12910R11939KR11939KD1071N4148D1071N4148R1E21megR1E21megR1591KR1591KR12810R12810R12710R12710C134470pFC134470pFQ1192SA1013Q1192SA1013C124430pFC124430pFP103B5PIN3.96-CP103B5PIN3.96-C12453R193100R193100Q1022SA970Q1

33、022SA970R1G51megR1G51megQ1042SC2878Q1042SC2878+C1414.7uF+C1414.7uFR15010KR15010KG1G1N.I.G1G1N.I.1Q1122SC2240Q1122SC2240+-IC104BTL084CN+-IC104BTL084CN567R14810KR14810KR1E9330KR1E9330K+C10510uF+C10510uFR1810.22R1810.22Q1032SC2240Q1032SC2240Q131KSA1220AQ131KSA1220AD1151N4148D1151N4148Q135KSC2690AQ135KS

34、C2690AR122100KR122100KQ101KSC2690AQ101KSC2690AR15110KR15110KR1F122KR1F122K+-IC104ATL084CN+-IC104ATL084CN321411C142100nFC142100nFR11715R11715Q1162SA970Q1162SA970R13810KR13810KCWRV102500CWRV102500132Q138KSA1220AQ138KSA1220AR196100KR196100KR18833KR18833K+C10810uF+C10810uFQ149MPSA92Q149MPSA92R1F5270KR1F

35、5270KQ1212SC1815Q1212SC1815R1554.7R1554.7D1051N4148D1051N4148R1A8220R1A8220Q1292SA970Q1292SA970Q147MPSA92Q147MPSA92R18922KR18922KQ1392SA2121Q1392SA2121R124100KR124100KR1F210KR1F210KQ132KSC2690AQ132KSC2690AC11633pFC11633pFR17610KR17610KR1651R1651R16722R16722+C12510uF+C12510uF+-IC104DTL084CN+-IC104DTL

36、084CN121314R10210KR10210K+C14610uF+C14610uFD124N.I.D124N.I.CB101ST-22 90C L TYPECB101ST-22 90C L TYPE12+C14510uF+C14510uFR1443.3R1443.3+C10310uF+C10310uFD11118VD11118V+C15010uF+C15010uFR1614.7R1614.7Q1172SC2240Q1172SC2240R1A410R1A410R1332.7KR1332.7KR1E124.3KR1E124.3K+-IC104CTL084CN+-IC104CTL084CN109

37、8R158910R158910P104A5PIN2.54-CP104A5PIN2.54-C13245C154100nFC154100nFR1H31KR1H31KR1E5100R1E5100+C11510uF+C11510uFR1981KR1981KQ150MPSA92Q150MPSA92R105100R105100C110100nFC110100nFR1301KR1301KQ1302SC2240Q1302SC2240D109BAV21D109BAV21IC101TL431IC101TL431231+C11810uF+C11810uFD121N.I.D121N.I.R1790.22R1790.2

38、2R111100R111100Q1152SA970Q1152SA970R16418R16418D1061N4148D1061N4148C139100nFC139100nFR184470R184470Q1202SC2383Q1202SC2383R1E30.05R1E30.05C144100nFC144100nFQ137KSA1220AQ137KSA1220ACB102ST-22 80C L TYPECB102ST-22 80C L TYPE12Q1062SC2878Q1062SC2878+C10910uF+C10910uFC128100nFC128100nFP101B11PIN2.54-CP10

39、1B11PIN2.54-C1234567891011R1A27.32KR1A27.32KR1A97.32KR1A97.32KR1G2220KR1G2220K+C11110uF+C11110uFR10924KR10924KR17810KR17810KR1463.9KR1463.9KR113220KR113220KL103100uHL103100uHR17710R17710C113120pFC113120pF+C11410uF+C11410uFR1740.22R1740.22R18547KR18547KIC103TL431IC103TL431231R1433.3R1433.3D1121N4148D

40、1121N4148R1403.9KR1403.9KC126100nFC126100nFR1573.3KR1573.3KR1N2N.I.R1N2N.I.C153N.I.C153N.I.R1N1100R1N1100D1131N5404D1131N5404D1252.4VD1252.4VR12382R12382R1N81KR1N81KD110BAV21D110BAV21Q1142SC2240Q1142SC2240D1206.8VD1206.8VR125200R125200C101100nFC101100nFR1F410KR1F410KR1872.2KR1872.2KR192100R192100Q14

41、52SC5949Q1452SC5949R145330R145330R134N.I.R134N.I.R17018R17018L10210uHL10210uHC148470nFC148470nFR1E8100KR1E8100KR131N.I.R131N.I.R1681R1681Q1462SC5949Q1462SC5949Q1182SA1015Q1182SA1015R1H263.4R1H263.4R11515R11515R14910KR14910KL10110uHL10110uHR1F310KR1F310KR142330R142330R1361KR1361KR1101KR1101KR1F8390KR

42、1F8390KC131100nFC131100nFR1820.22R1820.22C10433pFC10433pFR1800.22R1800.22R1531.8megR1531.8megR1F9110KR1F9110KC132220pFC132220pFR1F7470KR1F7470KQ1512SC1815Q1512SC1815R1750.22R1750.22CWRV104100CWRV104100132+C15847uF+C15847uFR15633R15633Q1432SC5949Q1432SC5949C149470nFC149470nFR1E7560KR1E7560KD119BAV21D

43、119BAV21R17115R17115R1661R1661R1A3100R1A3100Q1132SC2240Q1132SC2240R1041KR1041KQ1402SA2121Q1402SA2121R108100R108100R1473.9KR1473.9KD1041N4148D1041N4148R12610R12610C152100nFC152100nFR19010KR19010KC12122pFC12122pF+C14710uF+C14710uF+C11910uF+C11910uFIC102TL431IC102TL431231Q1082SA970Q1082SA970R118220KR11

44、8220KR1H110KR1H110KD118BAV21D118BAV21D123N.I.D123N.I.Q152KSC2690AQ152KSC2690AD1021N4148D1021N4148R12182R12182R16315R16315D1291N4148D1291N4148R1G41megR1G41megR1A5100KR1A5100KR1371.5KR1371.5KR10624KR10624KR101475R101475+C12947uF+C12947uFR1N71KR1N71KR1E69.1KR1E69.1KQ1422SA2121Q1422SA2121R1G1100KR1G1100

45、KQ109KSA1220AQ109KSA1220AD1281N4148D1281N4148D1081N4148D1081N4148+C12010uF+C12010uFD1011N4148D1011N4148R197100KR197100KQ1222SA970Q1222SA970Q1072SC2240Q1072SC2240C136470pFC136470pFD1261N4148D1261N4148C156N.I.C156N.I.R152845R152845- 9 -SCHEMATICS DIAGRAM POWER AMP SECTIONISC TPOffset TPTP1 TP2AGND TPT

46、UNERAUXDISCCDTAPE2MUTETAPE1CDTUNERVIDEOAUXDISCIPODVIDEOIPODTAPE2TAPE1R1OUTDGNDT1OUTT1OUTR1OUTL OUTR OUTL INR IN-26V+26V+12VD+12VD+5VD+12VD-26V+26VSP AMUTESP BPROTSCLEDIR INBRIDGEIR OUTMM/MCEXTRAPHONO LPHONO RPHONO ENT1OUTR1OUT/1KV/1KV/1KV/1KV/1KV/1KV/1KV/1KV/1KV/1KV/1KV/1KVMP R INLEFTCD INLEFTTUNER

47、INLEFTDISC/PHOIN LEFTAUX INLEFTTAPE2 INLEFTTAPE2 OUTLEFTTAPE1 INLEFTTAPE1 OUTLEFTMP F INTO DISPLAY BOARD P701BFROM DISPLAYBOARD P702AAll Polyester capacitors are 63V 5% unless noted.All Elec. capacitors are 50V 20% unless noted.All Resistor are 1/6W 5% RJ13 unless noted.TAPE2 OUTRIGHTTAPE1 INRIGHTTA

48、PE1 OUTRIGHT/1KVMP R INRIGHT/1KV/1KV/1KV/1KVCD INRIGHT/1KV/1KVTUNER INRIGHT/1KV/1KVDISC/PHOIN RIGHTAUX INRIGHTTAPE2 INRIGHTPREOUT1/2 RIGHTPREOUT1/2 LEFTFROM RS232BOARD PS01A/1KVFROM TONEBOARD P301AMAIN INRIGHTMAIN INLEFTBRIDGESTEREO POSITIONTO L/R POWERAMPBOARD P102B/2W/1%/1%R247100KR247100KRL206AJR

49、C-27F/012/SRL206AJRC-27F/012/S345RCA203FAV6-8.4-13RCA203FAV6-8.4-1389R2331megR2331megRL209CJRC-27F/012/SRL209CJRC-27F/012/S12+C22410uF+C22410uFRL203CJRC-27F/012/SRL203CJRC-27F/012/S12C225220pFC225220pFC209100pFC209100pFC205100pFC205100pFRCA204CAV6-8.4-13RCA204CAV6-8.4-1346CWRV201A1KACWRV201A1KA312R2

50、20220R220220D2091N4148D2091N4148P203A8PIN2.54-A200BP203A8PIN2.54-A200B23415678R2261megR2261megR202220R202220RCA203BAV6-8.4-13RCA203BAV6-8.4-1323R2251megR2251megC201100pFC201100pFR2211megR2211megR2401megR2401megR2271megR2271megRL208CJRC-27F/012/SRL208CJRC-27F/012/S12RCA203DAV6-8.4-13RCA203DAV6-8.4-13