NAD-C300-int-sch 维修电路原理图.pdf

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1、NADSERVICE MANUAL C 300STEREOAMPLIFIERC 300STEREOAMPLIFIER December 2005 RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E REAR PANEL/FRONT PANEL VIEW.3 SPECIFICATIONS.4- 5 DISASSEMBLY INSTRUCTIONS.6 ALIGNMENT PROCEDURE7 PCB LAYOUT. 8- 9 SCHEMATIC DIAGRAM.10 WIRING DIAGRAM.11 IC BLOCK DI

2、AGRAM.12 ELECTRICAL PARTS LIST13- 16 EXPLODED VIEW PARTS LIST.17 EXPLODED VIEW.18 PACKING DIAGRAM.19 _SERVICE SAFETY PRECAUTIONS_ 1. Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE, REPLACE ONLY WITH DESIGNATED TYPE OF FUSE FOR *AH, *B1, *B AND *C VERSIONS. Reference N

3、o Part Number Description F701F702 20-00500-25 T5AL250V Fuse F703F704 20-00050-25 T0.5AL250V Fuse NOTE: : USA, CANADIAN MODEL ONLY. : UK MODEL ONLY. : AUSTRALIAN MODEL ONLY. : EUROPEAN MODEL ONLY. 2. Safety check out (Only U.S.A. Model) Before returning the product to the customer, make leakage curr

4、ent 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 with parts recommended by the manufacturer. !RadioFans.CN 收音机爱 好者资料库 - 4 - SP

5、ECIFICATIONS POWER AMPLIFIER SECTION STEREO MODE CONTINUOUS AVERAGE POWER OUTPUT INTO 8 OHMS.25W (Min. Power per channel, 20Hz-20kHz, both channels driven, with no more than rated distortion) Rated impedance.4-8ohms Rated distortion (THD 20Hz-20kHz).0.03% Clipping power (maximum continuous power per

6、 channel) .30W IHF dynamic headroom at 8 ohms.+2.4dB IHF dynamic power 8 ohms: .43W 4 ohms: .65W 2 ohms: .90W Damping factor (ref. 8 ohms 50Hz) .100 Peak undistorted O/P current (into 0.10.5ohms, both channels running) 40A Frequency response at 20Hz-20kHz (Tone Control in).00.5dB Frequency response

7、at 10Hz/70kHz.-2dB THD.0.03% (Total Harmonic Distortion, 20Hz-20kHz, from 250mW to rated output) SMPTE I.M. .0.03% (IM distortion, 60Hz + 7kHz, 4:1, from 250mW to rated output) IHF I.M. (CCIF IM distortion, 19+20kHz at rated output) and DIM 100100dB ref.1W 114dB ref. rated power Maximum Output Level

8、 (Tape 1&2).5V rms TONE CONTROLS Treble (at 10kHz).6dB Bass (at 100Hz) .5dB PHYSICAL SPECIFICATION Dimensions in mm (WidthHeightDepth) .43595325 Net weight.5.0kg Shipping Weight.6.2kg Power Consumption(at 250W/4ohms output) 230V 50Hz.185W T P 5T P 6T P 7T P 8V R 3 0 2V R 3 0 1V R 4 0 1D 3 0 5D 4 0 5

9、V R 4 0 2ALIGNMENT PROCEDURE A. OUTPUT OFFSET VOLTAGE 1.Push Power on, preheat unit for 5 minutes. 2.Connect the DC Millivoltmeter to L Channel speaker output terminals or TP5 and TP7, adjust VR301 to get a reading of 0V30mV. 3.Connect the DC Millivoltmeter to R Channel speaker output terminals or T

10、P6 and TP8, adjust VR401 to get a reading of 0V30mV. B. IDLING CURRENT 1.Connect the DC Millivoltmeter across D305, adjust VR302 for 160 - 180mV reading on meter. 2.Connect the DC Millivoltmeter across D405, adjust VR402 for 160 - 180mV reading on meter. - 5 -R C H - B A RG N D - B A RP O W E R T R

11、A N S F O R M E RC B 7 0 4H E A D P H O N EB O A R DP O W E R S W I T C HB O A R DP O W E R L E DB O A R DD I S P L A Y B O A R DM O D U L E 1 T O C Z 3 0 1M O D U L E 2 T O C Z 4 0 1M O D U L E 3 T O C Z 6 1C B 5 0 1C B 1 0 2M A I N B O A R DT O N E C O N T R O L B O A R DR E D ( C E ) B L U E ( A

12、H )B R O W N ( C E )B L U E ( C E )P R E - E N D B A RP O W E R B O A R DWIRING DIAGRAM- 9 -B L U E ( A H )W H I T E ( A H )B L A C K ( A H )W H I T E ( A H )RESISTORSR71707- 90001- 00Tt= 90PosistorR813207- 05082- 068R21/6W5%Carbon Film ResistorR1, R617, R618, R619, R620,R815x207- 05100- 06101/6W5%C

13、arbon Film ResistorR615, R616, R814207- 05330- 06331/6W5%Carbon Film ResistorR809207- 05680- 06681/6W5%Carbon Film ResistorR808207- 05221- 062201/6W5%Carbon Film ResistorR810207- 05471- 064701/6W5%Carbon Film ResistorR611, R61207- 05102- 061K1/6W5%Carbon Film ResistorR613, R614, R812207- 05103- 0610

14、K1/6W5%Carbon Film ResistorR324, R42407- 05104- 06100K1/6W5%Carbon Film ResistorR321, R42107- 05020- 0420.25W5%Carbon Film ResistorR319, R41907- 05220- 04220.25W5%Carbon Film ResistorR309, R316, R409, R41607- 05330- 04330.25W5%Carbon Film ResistorR313, R41307- 05680- 04680.25W5%Carbon Film ResistorR

15、314, R414, R738, R744,R74507- 05101- 041000.25W5%Carbon Film ResistorR310, R41007- 05221- 042200.25W5%Carbon Film ResistorR315, R41507- 05271- 042700.25W5%Carbon Film ResistorR305, R307, R312, R405,R407, R412, R511, R51207- 05102- 041K0.25W5%Carbon Film ResistorR320, R322, R420, R42207- 05471- 04470

16、0.25W5%Carbon Film ResistorR504, R505, R506, R507,R508, R50907- 05222- 042K20.25W5%Carbon Film ResistorR711, R726, R728, R73507- 05332- 043K30.25W5%Carbon Film ResistorR318, R418R311, R41107- 05472- 044K70.25W5%Carbon Film ResistorR704, R72007- 05682- 046K80.25W5%Carbon Film ResistorR736, R73707- 05

17、822- 048K20.25W5%Carbon Film ResistorR302, R308, R402, R408,R503, R510, R513, R514,R515, R708, R709, R729,R74007- 05103- 0410K0.25W5%Carbon Film ResistorR304, R404, R721, R74107- 05223- 0422K0.25W5%Carbon Film ResistorR703, R705, R706, R707,R710, R712, R714, R715,R716, R718, R719, R724,R72707- 05333

18、- 0433K0.25W5%Carbon Film ResistorR702, R73007- 05563- 0456K0.25W5%Carbon Film ResistorR328, R42807- 05104- 04100K0.25W5%Carbon Film ResistorR701, R72507- 05224- 04220K0.25W5%Carbon Film ResistorR323, R42307- 05684- 04680K0.25W5%Carbon Film ResistorR102, R104, R106, R108,R110, R112, R114, R116,R202,

19、 R204, R206, R208,R210, R212, R214, R21607- 05105- 041M0.25W5%Carbon Film ResistorR71307- 05005- 50A0.055W5%Cerment ResistorR327, R42707- 01911- 10B9101W1%Flame Proof ResistorR326, R42607- 05033- 20B3R32W5%Flame Proof ResistorR329, R42907- 05221- 20B2202W5%Flame Proof ResistorR306, R40607- 05102- 20

20、B1K2W5%Flame Proof ResistorR72307- 10561- 02C5600.5W10%Fusible ResistorR8052, R806207- 05680- 06D681/6W5%Metal Film ResistorR802207- 05101- 06D1001/6W5%Metal Film ResistorR61, R6207- 05221- 06D2201/6W5%Metal Film ResistorR65, R6607- 01391- 06D3901/6W1%Metal Film ResistorR69, R61007- 01621- 06D6201/6

21、W1%Metal Film ResistorR67, R6807- 05102- 06D1K1/6W5%Metal Film ResistorREF. NO.DESCRIPTIONPART NO.!REF. NO.DESCRIPTIONPART NO.R62107- 05102- 06D1K1/6W5%Metal Film ResistorR803207- 05222- 06D2K21/6W5%Metal Film ResistorR8072, R819207- 05103- 06D10K1/6W5%Metal Film ResistorR120, R22007- 05393- 06D39K1

22、/6W5%Metal Film ResistorR63, R6407- 01225- 06D2M21/6W1%Metal Film ResistorR801207- 01225- 06D2M21/6W1%Metal Film ResistorR303, R40307- 01330- 04D330.25W1%Metal Film ResistorR301, R40107- 05101- 04D1000.25W5%Metal Film ResistorR135, R23507- 05151- 04D1500.25W5%Metal Film ResistorR73107- 012260- 04D22

23、60.25W1%Metal Film ResistorR73407- 012320- 04D2320.25W1%Metal Film ResistorR130, R23007- 05391- 04D3900.25W5%Metal Film ResistorR133, R23307- 05431- 04D4300.25W5%Metal Film ResistorR105, R107, R115, R207,R209, R101, R201, R117,R211, R103, R215, R111,R109, R205, R217, R203,R113, R21307- 05471- 04D470

24、0.25W5%Metal Film ResistorR131, R23107- 05102- 04D1K0.25W5%Metal Film ResistorR129, R22907- 05182- 04D1K80.25W5%Metal Film ResistorR134, R23407- 05222- 04D2K20.25W5%Metal Film ResistorR128, R22807- 05332- 04D3K30.25W5%Metal Film ResistorR732, R73307- 01622- 04D6K20.25W1%Metal Film ResistorR132, R232

25、07- 05912- 04D9K10.25W5%Metal Film ResistorR119, R21907- 05104- 04D100K0.25W5%Metal Film ResistorR118, R21807- 05274- 04D270K0.25W5%Metal Film ResistorPOTENTIOMETERSRV1, RV209- 16103- 1210KATONE PotentiometersRV309- 16103- 12M10KAVOLUME PotentiometerRV409- 16203- 0220K MNBALANCE PotentiometerVR301,

26、VR302, VR401,VR40210- 01103- 00T10KSEMI PotentiometersCAPACITORSC63, C6405- 00100- 2010pF50V20%Ceramic Disk CapacitorC502, C50305- 00220- 2022pF50V20%Ceramic Disk CapacitorC802205- 00470- 1047pF50V10%Ceramic Disk CapacitorC101, C102, C103, C104,C105, C106, C107, C108,C109, C201, C202, C203,C204, C20

27、5, C206, C207,C208, C20905- 00101- 20100pF50V10%Ceramic Disk CapacitorC69, C61005- 00101- 20100pF50V10%Ceramic Disk CapacitorC804205- 00151- 10150pF100V 10%Ceramic Disk CapacitorC61, C62, C801205- 00221- 10220pF50V10%Ceramic Disk CapacitorC61105- 00331- 10330pF50V10%Ceramic Disk CapacitorC121, C2210

28、5- 00102- 201000pF50V10%Ceramic Disk CapacitorC62305- 04472- 204.7nF400V20%Ceramic Disk CapacitorC112, C212, C509, C708,C723, C724, C73405- 00103- 2010nF50V +50- 20%Ceramic Disk CapacitorC65, C66, C67, C68, C501,C714, C715, C718, C719,C722, C8062, C8072,05- 10104- 200.1uF50V20%Ceramic Disk Capacitor

29、C311, C411, C303, C40305- 30103- 1010nF63V10%Polyester Film CapacitorC117, C21705- 30183- 1018nF63V10%Polyester Film CapacitorC110, C210, C118, C218,C308, C309, C408, C40905- 30104- 100.1uF63V10%Polyester Film CapacitorC701, C70205- 31104- 100.1uF100V 10%Polyester Film CapacitorC120, C22005- 20115-

30、10A1.15uF63V5%Metallized Polyester Film CapacitorC119, C219, C810205- 20224- 10A0.22uF63V5%Metallized Polyester Film Capacitor!REF. NO.DESCRIPTIONPART NO.C508, C70706- 50105- 201uF50V20%Electrolytic CapacitorC504, C50506- 50475- 204.7uF50V20%Electrolytic CapacitorC803206- 16106- 20M10uF16V20%Electro

31、lytic CapacitorC72106- 25106- 2010uF25V20%Electrolytic CapacitorC727, C72806- 35106- 2010uF35V20%Electrolytic CapacitorC705, C716, C717, C725,C726, C729, C73006- 50106- 2010uF50V20%Electrolytic CapacitorC808206- 35226- 20M22uF35V20%Electrolytic CapacitorC70906- 16336- 2033uF16V20%Electrolytic Capaci

32、torC305, C307, C405, C407,C50606- 16476- 2047uF16V20%Electrolytic CapacitorC116, C21606- 25107- 20100uF25V20%Electrolytic CapacitorC710, C71106- 06107- 20100uF6.3V20%Electrolytic CapacitorC304, C404, C720, C731,C73206- 35107- 20100uF35V20%Electrolytic CapacitorC70606- 50107- 20100uF50V20%Electrolyti

33、c CapacitorC306, C40606- 10227- 20220uF10V20%Electrolytic CapacitorC703, C70406- 50109- 2010000uF50V +50%- 20% Electrolytic CapacitorC302, C40206- 06228- 202200uF6.3V20%Electrolytic CapacitorC712, C71306- 50228- 202200uF50V20%Electrolytic CapacitorDIODESD304, D40402- 00027- 052V70.5WZener DiodeD7150

34、2- 00056- 055V60.5WZener DiodeD704, D70602- 00240- 0524V0.5WZener DiodeD8012, D8022, D61, D6302- 24148- 001N4148Switch DiodeD303, D403, D71802- 24148- 001N4148Switch DiodeD62, D64, D302, D306, D307,D301, D401, D402, D406,D407, D701, D702, D703,D705, D707, D708, D711,D712, D713, D714, D716,D71702- 24

35、148- 001N4148Switch DiodeD305, D40502- 15822- 001N5822Schottky DiodeD309, D40902- 00014- 002AK14Switch DiodeLD50102- 30515- 255D- LED5Dual- Color LEDB70202- 42006- 00KBU6DRectifier BridgeB70102- 42008- 00KBU8DRectifier BridgeICIC50103- 10621- 03IS1U621LIR SensorIC50203- 02051- 20AT89C2051- 24MicomIC

36、70103- 00317- 03LM317TRegulatorIC70203- 00337- 03LM337TRegulatorIC70303- 07805- 037805RegulatorTRANSISTORSQ303, Q305, Q309, Q403,Q405, Q409, Q501, Q502,Q503, Q504, Q506, Q702,Q703, Q710, Q711, Q713,Q805201- 01015- 0702SA1015- GRSmall Signal TransistorQ63, Q65, Q310, Q410, Q714,Q8022, Q8032, Q8042,Q8

37、06201- 00872- 0202SA872AESmall Signal TransistorQ64, Q66, Q304, Q404, Q712,Q808201- 00649- 0012SB649APower TransistorREF. NO.DESCRIPTIONPART NO.Q302, Q402, Q701, Q704,Q705, Q70701- 01775- 0002SC1775AESmall Signal TransistorQ306, Q406, Q505, Q708,Q70901- 01815- 070Small Signal TransistorQ301, Q40101-

38、 02878- 0202SC2878- ASwitching TransistorQ67, Q68, Q706, Q807 201- 00669- 0012SD669APower TransistorQ307, Q308, Q407, Q40801- 00055- 003STP55NE06LPower MOSFETQ61, Q62, Q801 201- 00369- 070Junction FETSWITCHESSW1, SW2, SW3, SW4, SW5,SW6, SW711- 03007- 00Latching SwitchSW811- 01022- 01DPDT2Push Switch

39、SW70111- 01001- 00Power SwitchFUSESF703, F70420- 00050- 25T500mA250VTime- lag FuseF701, F70220- 00500- 25T5A250VTime- lag FuseOTHERSL301, L40108- 15580- 101uHAir InductorT701*C08- 67261- 00TI- 67261DTransformer C VersionT701*AH08- 67262- 00TI- 67262Transformer AH VersionJD60112- 02024- 05RelayTP5, T

40、P6, TP7, TP813- 01000- 00Test PinCB70117- 00200- 01PHONE JACKHead Phone JackRCA1, RCA2, RCA317- 01200- 044- Pin RCARCA417- 01200- 066- Pin RCACB117- 02200- 04Binding PostSDDLB1027U- RN2SK369- GRFTR- F1AA024ASW1- SW5, SW7 DPDT2SW6 FPDT22SC1815- GR!Qty.Qty.C00145- 00300- 01Chassis117- 01200- 066- Pin

41、RCA1C00245- 00300- 04Base Cover1C03745- 00320- 08Module Support 11C00353- 00320- 05Foot4C00456- 00320- 01Foot Pad4F00155- 00300- 01Fascia1C00509- 16103- 12MVolume Potentiometer1F00253- 00300- 01Input Button Lozenge1C00611- 03007- 00Latching Switch1F00353- 00320- 01Tone Control Lozenge1C00745- 00300-

42、 02Stopper2F00451- 00320- 01Volume Knob1C00840- 08040- 22Bolt1F00551- 00320- 02Tone Knob3C00945- 00320- 07Trans. Bracket1F00652- 00320- 02Power Button1C01046- 00320- 03Shielding Box1F00753- 00300- 02Push Button8C01143- 08002- 00Spring Washer2F00853- 00320- 04Power Button Bezel1C01241- 08008- 00Nut2F

43、00954- 00320- 02LED Lens1C01356- 00320- 05Rubber Pad2F01054- 00320- 01IRS LENS1C014*C08- 67261- 00Transformer C Version1S00145- 00300- 03Subfascia1C014*AH08- 67262- 00Transformer AH Version1S00245- 00300- 10IR Cover1C01545- 00320- 09Transformer Disc1S00345- 00300- 09Bracket (PH.)1C01669- 00300- 02Tr

44、ansformer Label1S00411- 01001- 00Power Switch1C01747- 00300- 03Heat Sink(Big) Plate1S00517- 00200- 01Head Phone Jack1C01847- 00300- 02Heat Sink1S00611- 01022- 01Push Switch1C01956- 00300- 01Heat Conductive Pad4S00709- 16203- 02BALANCE POT1C02016- 0C300- 11Power Transistor Fixer2S00809- 16103- 12TONE

45、 POT2C02145- 00300- 06Tr. Clamper2C02207- 90001- 00TPosistor1R001*C46- 00300- 02Rear Panel1C02345- 00300- 05PCB Support1R001*AH46- 00300- 02HRear Panel1C02455- 00300- 02Module Lid2R00258- 00320- 01Strain Relief Bushing 1C02545- 00300- 13Trans.Clamp (Module)2R003*C15- 00183- 00AC Cord C Version1C0264

46、7- 00300- 04Module Support 22R003*AH15- 00183- 00HAC Cord AH Version1C02756- 00300- 02Insulated Cushion2C02847- 00300- 01Small Heatsink3T00146- 00300- 01Top Cover1C02948- 00300- 04Bus Bar (3)1C03048- 00300- 02Bus Bar (1)2000140- 04008- 07Self Taping Screw(48)8C03148- 00300- 03Bus Bar (2)1000240- 040

47、12- 01Machine Screw(412)2C03259- 00300- 02PCB Spacer1000340- 03008- 01Self Taping Screw(STB38)5C03345- 00300- 11BDP Support 1000440- 13008- 01Self Taping Screw(BTB38)17C03448- 00300- 01Pin (BDP)1000540- 03006- 01Self Taping Screw(36)46C03517- 02200- 04Speaker Binding Post1000640- 12604- 01Self Tapin

48、g Screw(2.64)2C03617- 01200- 044- Pin RCA3REF. NO.PART NO.DESCRIPTIONREF. NO.PART NO.DESCRIPTION!2F001F001F002F002F003F003F010F010F007F007F005F005F007F007F006F006F008F008F009F009F004F004S001S001S002S002S003S003S004S004S005S005S006S006S007S007C001C001C002C002C003C003C004C004C005C005C006C006C007C007C0

49、08C008C009C009C010C010C011C011C012C012C013C013C014C014C013C013C017C017C018C018C019C019C020C020C021C021C022C022C023C023C024C024C025C025C026C026C028C028C029C029C030C030C031C031C032C032C027C027C033C033C034C034C035C035C036C036T001T001R001R001R002R002R003R003000100010002000200010001000300030004000400040004000400040005000500050005000500050004000400050005000500050005000500050005000500050005000500060006000500050005000500050005C037C037S008S008MEMOSERVICE MANUAL NAD 2005C 300STEREOAMPLIFIERNAD ELECTRONICS INTERNATIONALTORONTO