NAD-C300-int-sch维修电路原理图.pdf

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1、NAD SERVICE MANUAL C 300 STEREO AMPLIFIER C 300 STEREO AMPLIFIER 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 BL

2、OCK DIAGRAM.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. Refer

3、ence No 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 leakag

4、e 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 with parts recommended by the manufacturer. ! RadioFans.CN 收音机爱 好者资料库 R

5、adioFans.CN 收音机爱 好者资料库 - 4 - SPECIFICATIONS 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 powe

6、r (maximum continuous power per 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

7、 in).00.5dB Frequency response 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. r

8、ated power Maximum Output Level (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 RadioFans.CN 收音机爱 好者资料库 T P 5T

9、 P 6 T P 7T P 8 V R 3 0 2 V R 3 0 1V R 4 0 1 D 3 0 5D 4 0 5 V R 4 0 2 ALIGNMENT 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

10、 DC Millivoltmeter to R Channel speaker output terminals or TP6 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 re

11、ading on meter. - 5 - RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 R C H - B A RG N D - B A R P O W E R T R A N S F O R M E R C B 7 0 4 H E A D P H O N E B O A R D P O W E R S W I T C H B O A R D P O W E R L E D B O A R D D I S P L A Y B O A R D M O

12、 D U L E 1 T O C Z 3 0 1M O D U L E 2 T O C Z 4 0 1 M O D U L E 3 T O C Z 6 1 C B 5 0 1 C B 1 0 2 M A I N B O A R D T O N E C O N T R O L B O A R D R E D ( C E ) B L U E ( A H ) B R O W N ( C E )B L U E ( C E ) P R E - E N D B A R P O W E R B O A R D WIRING DIAGRAM - 9 - B L U E ( A H )W H I T E ( A

13、 H ) B L A C K ( A H ) W H I T E ( A H ) RadioFans.CN 收音机爱 好者资料库 RESISTORS R71707- 90001- 00Tt= 90Posistor R813207- 05082- 068R21/6W5%Carbon Film Resistor R1, R617, R618, R619, R620, R815x2 07- 05100- 06101/6W5%Carbon Film Resistor R615, R616, R814207- 05330- 06331/6W5%Carbon Film Resistor R809207-

14、05680- 06681/6W5%Carbon Film Resistor R808207- 05221- 062201/6W5%Carbon Film Resistor R810207- 05471- 064701/6W5%Carbon Film Resistor R611, R61207- 05102- 061K1/6W5%Carbon Film Resistor R613, R614, R812207- 05103- 0610K1/6W5%Carbon Film Resistor R324, R42407- 05104- 06100K1/6W5%Carbon Film Resistor

15、R321, R42107- 05020- 0420.25W5%Carbon Film Resistor R319, R41907- 05220- 04220.25W5%Carbon Film Resistor R309, R316, R409, R41607- 05330- 04330.25W5%Carbon Film Resistor R313, R41307- 05680- 04680.25W5%Carbon Film Resistor R314, R414, R738, R744, R745 07- 05101- 041000.25W5%Carbon Film Resistor R310

16、, R41007- 05221- 042200.25W5%Carbon Film Resistor R315, R41507- 05271- 042700.25W5%Carbon Film Resistor R305, R307, R312, R405, R407, R412, R511, R512 07- 05102- 041K0.25W5%Carbon Film Resistor R320, R322, R420, R42207- 05471- 044700.25W5%Carbon Film Resistor R504, R505, R506, R507, R508, R509 07- 0

17、5222- 042K20.25W5%Carbon Film Resistor R711, R726, R728, R73507- 05332- 043K30.25W5%Carbon Film Resistor R318, R418 R311, R41107- 05472- 044K70.25W5%Carbon Film Resistor R704, R72007- 05682- 046K80.25W5%Carbon Film Resistor R736, R73707- 05822- 048K20.25W5%Carbon Film Resistor R302, R308, R402, R408

18、, R503, R510, R513, R514, R515, R708, R709, R729, R740 07- 05103- 0410K0.25W5%Carbon Film Resistor R304, R404, R721, R74107- 05223- 0422K0.25W5%Carbon Film Resistor R703, R705, R706, R707, R710, R712, R714, R715, R716, R718, R719, R724, R727 07- 05333- 0433K0.25W5%Carbon Film Resistor R702, R73007-

19、05563- 0456K0.25W5%Carbon Film Resistor R328, R42807- 05104- 04100K0.25W5%Carbon Film Resistor R701, R72507- 05224- 04220K0.25W5%Carbon Film Resistor R323, R42307- 05684- 04680K0.25W5%Carbon Film Resistor R102, R104, R106, R108, R110, R112, R114, R116, R202, R204, R206, R208, R210, R212, R214, R216

20、07- 05105- 041M0.25W5%Carbon Film Resistor R71307- 05005- 50A0.055W5%Cerment Resistor R327, R42707- 01911- 10B9101W1%Flame Proof Resistor R326, R42607- 05033- 20B3R32W5%Flame Proof Resistor R329, R42907- 05221- 20B2202W5%Flame Proof Resistor R306, R40607- 05102- 20B1K2W5%Flame Proof Resistor R72307-

21、 10561- 02C5600.5W10%Fusible Resistor R8052, R806207- 05680- 06D681/6W5%Metal Film Resistor R802207- 05101- 06D1001/6W5%Metal Film Resistor R61, R6207- 05221- 06D2201/6W5%Metal Film Resistor R65, R6607- 01391- 06D3901/6W1%Metal Film Resistor R69, R61007- 01621- 06D6201/6W1%Metal Film Resistor R67, R

22、6807- 05102- 06D1K1/6W5%Metal Film Resistor REF. NO.DESCRIPTIONPART NO. ! ! ! ! ! RadioFans.CN 收音机爱 好者资料库 REF. NO.DESCRIPTIONPART NO. R62107- 05102- 06D1K1/6W5%Metal Film Resistor R803207- 05222- 06D2K21/6W5%Metal Film Resistor R8072, R819207- 05103- 06D10K1/6W5%Metal Film Resistor R120, R22007- 053

23、93- 06D39K1/6W5%Metal Film Resistor R63, R6407- 01225- 06D2M21/6W1%Metal Film Resistor R801207- 01225- 06D2M21/6W1%Metal Film Resistor R303, R40307- 01330- 04D330.25W1%Metal Film Resistor R301, R40107- 05101- 04D1000.25W5%Metal Film Resistor R135, R23507- 05151- 04D1500.25W5%Metal Film Resistor R731

24、07- 012260- 04D2260.25W1%Metal Film Resistor R73407- 012320- 04D2320.25W1%Metal Film Resistor R130, R23007- 05391- 04D3900.25W5%Metal Film Resistor R133, R23307- 05431- 04D4300.25W5%Metal Film Resistor R105, R107, R115, R207, R209, R101, R201, R117, R211, R103, R215, R111, R109, R205, R217, R203, R1

25、13, R213 07- 05471- 04D4700.25W5%Metal Film Resistor R131, R23107- 05102- 04D1K0.25W5%Metal Film Resistor R129, R22907- 05182- 04D1K80.25W5%Metal Film Resistor R134, R23407- 05222- 04D2K20.25W5%Metal Film Resistor R128, R22807- 05332- 04D3K30.25W5%Metal Film Resistor R732, R73307- 01622- 04D6K20.25W

26、1%Metal Film Resistor R132, R23207- 05912- 04D9K10.25W5%Metal Film Resistor R119, R21907- 05104- 04D100K0.25W5%Metal Film Resistor R118, R21807- 05274- 04D270K0.25W5%Metal Film Resistor POTENTIOMETERS RV1, RV209- 16103- 1210KATONE Potentiometers RV309- 16103- 12M10KAVOLUME Potentiometer RV409- 16203

27、- 0220K MNBALANCE Potentiometer VR301, VR302, VR401, VR402 10- 01103- 00T10KSEMI Potentiometers CAPACITORS C63, C6405- 00100- 2010pF50V20%Ceramic Disk Capacitor C502, C50305- 00220- 2022pF50V20%Ceramic Disk Capacitor C802205- 00470- 1047pF50V10%Ceramic Disk Capacitor C101, C102, C103, C104, C105, C1

28、06, C107, C108, C109, C201, C202, C203, C204, C205, C206, C207, C208, C209 05- 00101- 20100pF50V10%Ceramic Disk Capacitor C69, C61005- 00101- 20100pF50V10%Ceramic Disk Capacitor C804205- 00151- 10150pF100V 10%Ceramic Disk Capacitor C61, C62, C801205- 00221- 10220pF50V10%Ceramic Disk Capacitor C61105

29、- 00331- 10330pF50V10%Ceramic Disk Capacitor C121, C22105- 00102- 201000pF50V10%Ceramic Disk Capacitor C62305- 04472- 204.7nF400V20%Ceramic Disk Capacitor C112, C212, C509, C708, C723, C724, C734 05- 00103- 2010nF50V +50- 20%Ceramic Disk Capacitor C65, C66, C67, C68, C501, C714, C715, C718, C719, C7

30、22, C8062, C8072, 05- 10104- 200.1uF50V20%Ceramic Disk Capacitor C311, C411, C303, C40305- 30103- 1010nF63V10%Polyester Film Capacitor C117, C21705- 30183- 1018nF63V10%Polyester Film Capacitor C110, C210, C118, C218, C308, C309, C408, C409 05- 30104- 100.1uF63V10%Polyester Film Capacitor C701, C7020

31、5- 31104- 100.1uF100V 10%Polyester Film Capacitor C120, C22005- 20115- 10A1.15uF63V5%Metallized Polyester Film Capacitor C119, C219, C810205- 20224- 10A0.22uF63V5%Metallized Polyester Film Capacitor ! RadioFans.CN 收音机爱 好者资料库 REF. NO.DESCRIPTIONPART NO. C508, C70706- 50105- 201uF50V20%Electrolytic Ca

32、pacitor C504, C50506- 50475- 204.7uF50V20%Electrolytic Capacitor C803206- 16106- 20M10uF16V20%Electrolytic Capacitor C72106- 25106- 2010uF25V20%Electrolytic Capacitor C727, C72806- 35106- 2010uF35V20%Electrolytic Capacitor C705, C716, C717, C725, C726, C729, C730 06- 50106- 2010uF50V20%Electrolytic

33、Capacitor C808206- 35226- 20M22uF35V20%Electrolytic Capacitor C70906- 16336- 2033uF16V20%Electrolytic Capacitor C305, C307, C405, C407, C506 06- 16476- 2047uF16V20%Electrolytic Capacitor C116, C21606- 25107- 20100uF25V20%Electrolytic Capacitor C710, C71106- 06107- 20100uF6.3V20%Electrolytic Capacito

34、r C304, C404, C720, C731, C732 06- 35107- 20100uF35V20%Electrolytic Capacitor C70606- 50107- 20100uF50V20%Electrolytic Capacitor C306, C40606- 10227- 20220uF10V20%Electrolytic Capacitor C703, C70406- 50109- 2010000uF50V +50%- 20% Electrolytic Capacitor C302, C40206- 06228- 202200uF6.3V20%Electrolyti

35、c Capacitor C712, C71306- 50228- 202200uF50V20%Electrolytic Capacitor DIODES D304, D40402- 00027- 052V70.5WZener Diode D71502- 00056- 055V60.5WZener Diode D704, D70602- 00240- 0524V0.5WZener Diode D8012, D8022, D61, D6302- 24148- 001N4148Switch Diode D303, D403, D71802- 24148- 001N4148Switch Diode D

36、62, D64, D302, D306, D307, D301, D401, D402, D406, D407, D701, D702, D703, D705, D707, D708, D711, D712, D713, D714, D716, D717 02- 24148- 001N4148Switch Diode D305, D40502- 15822- 001N5822Schottky Diode D309, D40902- 00014- 002AK14Switch Diode LD50102- 30515- 255D- LED5Dual- Color LED B70202- 42006

37、- 00KBU6DRectifier Bridge B70102- 42008- 00KBU8DRectifier Bridge IC IC50103- 10621- 03IS1U621LIR Sensor IC50203- 02051- 20AT89C2051- 24Micom IC70103- 00317- 03LM317TRegulator IC70203- 00337- 03LM337TRegulator IC70303- 07805- 037805Regulator TRANSISTORS Q303, Q305, Q309, Q403, Q405, Q409, Q501, Q502,

38、 Q503, Q504, Q506, Q702, Q703, Q710, Q711, Q713, Q8052 01- 01015- 0702SA1015- GRSmall Signal Transistor Q63, Q65, Q310, Q410, Q714, Q8022, Q8032, Q8042, Q8062 01- 00872- 0202SA872AESmall Signal Transistor Q64, Q66, Q304, Q404, Q712, Q8082 01- 00649- 0012SB649APower Transistor RadioFans.CN 收音机爱 好者资料库

39、 REF. NO.DESCRIPTIONPART NO. Q302, Q402, Q701, Q704, Q705, Q707 01- 01775- 0002SC1775AESmall Signal Transistor Q306, Q406, Q505, Q708, Q709 01- 01815- 070Small Signal Transistor Q301, Q40101- 02878- 0202SC2878- ASwitching Transistor Q67, Q68, Q706, Q807 201- 00669- 0012SD669APower Transistor Q307, Q

40、308, Q407, Q40801- 00055- 003STP55NE06LPower MOSFET Q61, Q62, Q801 201- 00369- 070Junction FET SWITCHES SW1, SW2, SW3, SW4, SW5, SW6, SW7 11- 03007- 00Latching Switch SW811- 01022- 01DPDT2Push Switch SW70111- 01001- 00Power Switch FUSES F703, F70420- 00050- 25T500mA250VTime- lag Fuse F701, F70220- 0

41、0500- 25T5A250VTime- lag Fuse OTHERS L301, L40108- 15580- 101uHAir Inductor T701*C08- 67261- 00TI- 67261DTransformer C Version T701*AH08- 67262- 00TI- 67262Transformer AH Version JD60112- 02024- 05Relay TP5, TP6, TP7, TP813- 01000- 00Test Pin CB70117- 00200- 01PHONE JACKHead Phone Jack RCA1, RCA2, R

42、CA317- 01200- 044- Pin RCA RCA417- 01200- 066- Pin RCA CB117- 02200- 04Binding Post SDDLB1027U- RN 2SK369- GR FTR- F1AA024A SW1- SW5, SW7 DPDT2 SW6 FPDT2 2SC1815- GR ! ! ! ! ! ! RadioFans.CN 收音机爱 好者资料库 Qty.Qty. C00145- 00300- 01Chassis117- 01200- 066- Pin RCA1 C00245- 00300- 04Base Cover1C03745- 003

43、20- 08Module Support 11 C00353- 00320- 05Foot4 C00456- 00320- 01Foot Pad4F00155- 00300- 01Fascia1 C00509- 16103- 12MVolume Potentiometer1F00253- 00300- 01Input Button Lozenge1 C00611- 03007- 00Latching Switch1F00353- 00320- 01Tone Control Lozenge1 C00745- 00300- 02Stopper2F00451- 00320- 01Volume Kno

44、b1 C00840- 08040- 22Bolt1F00551- 00320- 02Tone Knob3 C00945- 00320- 07Trans. Bracket1F00652- 00320- 02Power Button1 C01046- 00320- 03Shielding Box1F00753- 00300- 02Push Button8 C01143- 08002- 00Spring Washer2F00853- 00320- 04Power Button Bezel1 C01241- 08008- 00Nut2F00954- 00320- 02LED Lens1 C01356-

45、 00320- 05Rubber Pad2F01054- 00320- 01IRS LENS1 C014*C08- 67261- 00Transformer C Version1S00145- 00300- 03Subfascia1 C014*AH08- 67262- 00Transformer AH Version1S00245- 00300- 10IR Cover1 C01545- 00320- 09Transformer Disc1S00345- 00300- 09Bracket (PH.)1 C01669- 00300- 02Transformer Label1S00411- 0100

46、1- 00Power Switch1 C01747- 00300- 03Heat Sink(Big) Plate1S00517- 00200- 01Head Phone Jack1 C01847- 00300- 02Heat Sink1S00611- 01022- 01Push Switch1 C01956- 00300- 01Heat Conductive Pad4S00709- 16203- 02BALANCE POT1 C02016- 0C300- 11Power Transistor Fixer2S00809- 16103- 12TONE POT2 C02145- 00300- 06T

47、r. Clamper2 C02207- 90001- 00TPosistor1R001*C46- 00300- 02Rear Panel1 C02345- 00300- 05PCB Support1R001*AH46- 00300- 02HRear Panel1 C02455- 00300- 02Module Lid2R00258- 00320- 01Strain Relief Bushing 1 C02545- 00300- 13Trans.Clamp (Module)2R003*C15- 00183- 00AC Cord C Version1 C02647- 00300- 04Module

48、 Support 22R003*AH15- 00183- 00HAC Cord AH Version1 C02756- 00300- 02Insulated Cushion2 C02847- 00300- 01Small Heatsink3T00146- 00300- 01Top Cover1 C02948- 00300- 04Bus Bar (3)1 C03048- 00300- 02Bus Bar (1)2000140- 04008- 07Self Taping Screw(48)8 C03148- 00300- 03Bus Bar (2)1000240- 04012- 01Machine

49、 Screw(412)2 C03259- 00300- 02PCB Spacer1000340- 03008- 01Self Taping Screw(STB38)5 C03345- 00300- 11BDP Support 1000440- 13008- 01Self Taping Screw(BTB38)17 C03448- 00300- 01Pin (BDP)1000540- 03006- 01Self Taping Screw(36)46 C03517- 02200- 04Speaker Binding Post1000640- 12604- 01Self Taping Screw(2.64)2 C03617- 01200- 044- Pin RCA3 REF. NO.PART NO.DESCRIPTIONREF. NO.PART NO.DESCRIPTION ! ! ! ! ! ! 2 RadioFans.CN 收音机爱 好者资料库