NAD-S300-int-sm维修电路原理图.pdf

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1、S 300 SERVICE MANUAL Draft 2004 August RadioFans.CN 收音机爱好者资料库 CONTENTS FRONT PANEL / REAR PANEL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 EXPLODED

2、 VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . 31 ALIGNMENT PROCEDURE / ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . .5 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . .7-12 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-21 IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 ELECTRICAL PARTS LIST

5、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-28 SERVICE SAFETY PRECAUTIONS 1. ReplacingtheFuses 2. Safety-checkout (NorthAmericanmodelonly) CAUTION: NOTE: FOR CONTINUED PROTECTIONAGAINSTTHE RISK OF FIRE REPLACE ONLY WITHSAMETYPEOFFUSE. Parts marked with the sy

6、mbolare critical with regard to the risk of fire and electric shock. Replaceonlywithpartsrecommendedbythemanufacturer. Beforereturningtheproducttothecustomer,makeleakagecurrentorresistancemeasurements todeterminethatexposedpartsareacceptablyinsulatedfromthesupplycircuit. REFERENCENO.PARTNUMBERDESCRI

7、PTION F1*AH5100-2510-1CFuse 250mA250VTimeLagUL/CSA F2*AH5120-0061-0Fuse12A250VTimeLag6.3x32mm UL/CSA F1*C5120-0035-0Fuse100mA250VTimeLagLBCVDE/SEMKO F2*C5120-0025-0Fuse6.3A250VTimeLagHBCVDE/SEMKO *AH:NorthAmericanmodelonly *C :Europeanmodelonly ! 2 RadioFans.CN 收音机爱好者资料库 The graphic symbol of a lig

8、htning flash with an arrow point within a triangle signifies that there is dangerous voltage within the unit and it posses a hazard to anyone removing the cover to gain access to the interior of the unit.Only qualified service personnel should make such attempt. The graphic symbol of an exclamation

9、point within an equilateral triangle warns a user of the device thatitis necessary to refer to the instruction manual and its warnings for proper operation of the unit. REAR PANEL CONNECTIONS FRONT PANEL CONTROLS 1. POWER SWITCH4. VOLUME CONTROL7. TAPE MONITOR INDICATOR 2. INFRA-RED RECEIVER5. INPUT

10、 SELECTOR8. INFRA-RED INDICATOR 3. TAPE MONITOR6. INPUT INDICATOR9. POWER INDICATOR 1. RIGHT BALANCED CD INPUT6. LEFT TAPE INPUT/OUTPUT11. AC INLET 2. RIGHT VIDEO INPUT7. LEFT TUNER INPUT12. LEFT SPEAKER OUTPUT 3. RIGHT AUX INPUT8. LEFT AUX INPUT13. GROUND TERMINAL 4. RIGHT TUNER INPUT9. LEFT VIDEO

11、INPUT14. RIGHT SPEAKER OUTPUT 5. RIGHT TAPE INPUT/OUTPUT10. LEFT BALANCED CD INPUT15. NAD LINK INPUT/OUTPUT FRONT PANEL / REAR PANEL VIEW 12345678910 1112131415 Dual Mono Integrated Amplifier S300 NAD TAPE MONITORTUNERIRCDAUXVIDEO 12345 6789 3 RadioFans.CN 收音机爱好者资料库 Measured in accordance with EIA

12、Standard RS-490 (IHF-A-202) 1978. Physical specifications Continuous average power output at 8100W (20dBW) Input impedanceSingle ended10K Balanced20K Sensitivity350mV Signal-to-Noise ratio (A-weighted)ref. 1W88dB Frequency response20Hz - 20kHz+/-0.1dB -3dB Gain tracking error+/-0.1 at maximum +/-3dB

13、 at -60dB level Damping factor110 Dimensions (W x H x D)450 x 160 x 400 mm Net weight25.5 kg / 56.1 lbs ? ? ? (Minimum power per channel, 20Hz-20kHz, both channels driven, with no more than rated distortion) (for rated power into 8 ) (ref. 8 , 50 Hz) ? ? DC - 250kHz SPECIFICATIONS 4 RadioFans.CN 收音机

14、爱好者资料库 ALIGNMENT PROCEDURE IDLE CURRENT ALIGNMENT (no load, no signal) 1. Connect a digital millivoltmeter between TP301 and TP303, and adjust P501 to obtain a reading of between 30mV and 35mV. 2. Transfer the digital millivoltmeter to TP302 and TP304 and adjust P502 to obtain a reading of between

15、30mV and 35mV. 3. Leave power on for at least 5 minutes to allow the idle currents to stabilize. Re-adjust P501 and P502 as necessary to obtain a reading of between 30mV to 35mV on each channel. ADJUSTMENT POINTS TP303 TP301 P501 ALIGNMENT TOOL TP304 TP302 P502 ALIGNMENT TOOL LEFT POWER AMP PCBRIGHT

16、 POWER AMP PCB 5 RadioFans.CN 收音机爱好者资料库 WIRING DIAGRAM NL JK203 RED WHITE BLACK BLACK JK205 RED BLACK JK207 RED BLACK JK209 RED BLACK JK212JK210JK208JK206JK204 RED RED RED RED RED BLUE BLACK BLACK BLACK BLACK BLACK BLACK JK211 RED BLACK GRAY BLACK BLACK (X6) BLACK (X6) J402 J403 J404 1 1 GROUND TER

17、MINAL AC INLET TRANSFORMER - LEFTTRANSFORMER - RIGHT POWER SWITCH -LEFT+ SPEAKER TERMINALS + RIGHT - SPEAKER TERMINALS J532J531 J313J314 J327 +50V+50V -50V SPK SPK GND L GND R J328 -50V J318 J317 J518 J517 J316 J315 J516 J515 J320 J319 J520 J519 J326 J325 J526 J525 J324 J323 J524 J523 J322 J321 J522

18、 J521 J307 YEL/GRN YEL/GRN J302 J301 ORANGE ORANGE WHITE WHITE WHITE WHITE BLUE BLUE BLUE BLUE RED RED RED RED RED BLACK BLACK BLACK BLACK BLACK BROWN BROWN RED BLACK BROWN BROWN J304 J303 GRAY GRAY J310 J309 ORANGE ORANGE J308 J36 J36 J21 J22 J11 J12 J46 J46 J55 J55 J54 J54 J53 J53 J52 J52 J51 J51

19、J35 J35 J45 J45 J34 J34 J44 J44 J33 J33 J43 J43 J32 J32 J42 J42 J31 J31 J41 J41 RED RED WHITE WHITE PRIMARY - 120V VERSION PRIMARY - 120V VERSION PRIMARY - 230V VERSIONPRIMARY - 230V VERSION J401 1 2 25 26 J7 J102 1 2 1 2 25 26 25 26 MAIN BOARD NAD LINK BOARD LEFT POWER AMP BOARD RIGHT POWER AMP BOA

20、RD POWER SUPPLY BOARD FRONT PANEL BOARD BLUE BLUE WHITE WHITE 6 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 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 RadioFans.CN 收音机爱好者资料库 RadioFans.CN 收音机爱好者

21、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 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 IC BLOCK DIAGRAM 2 1 3 8 7 6 54 + - OFFSET NULL OFFSET NULLNC OUTPUT INVERTING INPUT NON-INVERTING INPUT V- V+ 1 2 3 4 5 6 710 11 12 13 14 15 16 89 IN 1

22、 IN 2 IN 3 IN 4 IN 5 IN 6 IN 7 GND OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 COMMON FREE WHEELING DIODES 2 1 3 8 7 6 54 1A 1E1K 2C2A 2E2K 1C 1 2 3 4 5 6 78 9 10 11 12 13 141A 1B 1Y 2A 2B 2Y GND VCC 4B 4A 4Y 3B 3A 3Y 1 2 3 4 5 6 78 9 10 11 12 13 14OUTPUT 1 INVERTING INPUT 1 NON-INVERTING INPUT 1 V+CC

23、 NON-INVERTING INPUT 2 INVERTING INPUT 2 OUTPUT 2 OUTPUT 4 INVERTING INPUT 4 NON-INVERTING INPUT 4 VCC- NON-INVERTING INPUT 3 INVERTING INPUT 3 OUTPUT 3 - + - + - + - + INPUT LOGIC 12345678910 V1CC V1CC OUT 2 IN 1 GND GND IN 2 OUT 1 V 2CC V2CC 2 1 3 8 7 6 54 + - OUTPUT A OUTPUT B INVERTING INPUT A I

24、NVERTING INPUT B NON-INVERTING INPUT A NON-INVERTING INPUT B V- V+ AB Q209-Q210: AD712JN HIGH PERFORMANCE DUAL OP-AMP Q301-Q302: AD711JN HIGH PERFORMANCE MONO OP-AMP Q319-Q320: TL074CN LOW NOISE QUAD OP-AMP Q401: ULN2003A 7 DARLINGTON ARRAYS FOR RELAY DRIVE Q402: LB1642 MOTOR DRIVER Q103: 74HCT00 2-

25、INPUT QUAD NAND GATE Q403: TIL198B DUAL OPTOCOUPLER 22 RadioFans.CN 收音机爱好者资料库 NADNAD IRIRTAPE MONITOR TAPE MONITORTUNERTUNERAUXAUXVIDEOVIDEOCDCD Dual Mono Integrated Amplifier S300Dual Mono Integrated Amplifier S300 1 2 3 4 5 6 38 7 8 9 10 10 11 11 12 12 13 13 15 14 16 17 18 19 2022 21 24 25 23 26

26、27 28 27 28 29 30 31 32 33 34 35 36 37 EXPLODED VIEW 29 RadioFans.CN 收音机爱好者资料库 EXPLODED VIEW PARTS LIST ITEMPART NUMBERDESCRIPTIONQTY. 1S300-2002-4FASCIA1 2S200-2005-2TOP COVER1 3*AHS300-2004AH-4REAR PANEL 120V1 3*CS300-2004C-4REAR PANEL 230V1 4S300-2003-2BASE PLATE1 5S300-2003-3RIGHT FRONT HEATSIN

27、K1 6S300-2023-2RIGHT REAR HEATSINK1 7S300-2013-3LEFT FRONT HEATSINK1 8S300-2033-2LEFT REAR HEATSINK1 9S300-2012-4SUBFASCIA1 10S300-2043-3HEATSINK PLATE2 11S300-2015-3TOP COVER MOUNTING BAR2 12S300-2022-3SUBFASCIA BAR2 13S300-2014-4REAR PANEL BAR2 14S300-2006-2AINPUT BOARD BAR 11 15S300-2006-2BINPUT

28、BOARD BAR 21 16S100-2013-2FOOT W/ RUBBER CUSHION4 17S300-2032-2VOLUME KNOB1 18S100-2011-310MM POWER BUTTON1 19S400-2121-16MM INPUT BUTTON5 20S100-2221-1IRS LENS1 21S300-0205POWER SWITCH1 22S300-2052VOLUME BUSHING1 23S300-2112ISOLATION PLATE1 24S300-2042-2VOLUME SHAFT1 25BSK 44 02 40VOLUME COUPLING1

29、26PX0690/28AC INLET1 27WBT-745 BLACKSPEAKER TERMINAL BLACK2 28WBT-745 REDSPEAKER TERMINAL RED2 29S300-0202RCA JACK WHITE5 30S300-0201RCA JACK RED5 31S300-0206GROUND TERMINAL1 32TI-65300ATRANSFORMER1 33S300-0150FRONT PANEL PCB1 34S300-0100PSU PCB1 35S300-0151INPUT STAGE PCB1 36S300-0140LEFT POWER STA

30、GE PCB1 37S300-0130RIGHT POWER STAGE PCB1 38S300-0204NAD LINK PCB1 30 RadioFans.CN 收音机爱好者资料库 NADNAD IRIRTAPE MONITORTAPE MONITORTUNERTUNER AUXAUXVIDEOVIDEOCDCD Dual Mono Integrated Amplifier S300Dual Mono Integrated Amplifier S300 39 39 40 41 42 43 44 45 46 47 ITEMPART NUMBERDESCRIPTIONQTY. 3931123

31、2POLYFOAM1 SET 40S300-2010-ACARTON BOX1 41*AHPOW4POWER CORD NEMA 1-15 POLARIZED1 41*CPOW2POWER CORD CEE (7) XVII1 43101-000BNAD LINK CABLE1 44RC 450REMOTE CONTROL HANDSET1 45R03BATTERY1 SET 46WARRWARRANTY CARD1 47S300-IMINSTRUCTION MANUAL1 42101-000AAUDIO CABLE1 PACKING DIAGRAM 31 RadioFans.CN 收音机爱好者资料库