NAD-S300-int-sm 维修电路原理图.pdf

S 300SERVICE MANUALDraft 2004 AugustRadioFans.CN 收音机爱 好者资料库CONTENTSFRONT PANEL / REAR PANEL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31ALIGNMENT PROCEDURE / ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . .5WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-12SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-21IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-28SERVICE SAFETY PRECAUTIONS1. ReplacingtheFuses2. Safety-checkout (NorthAmericanmodelonly)CAUTION:NOTE:FOR CONTINUED PROTECTIONAGAINSTTHE RISK OF FIRE REPLACE ONLYWITHSAMETYPEOFFUSE.Parts marked with the symbolare critical with regard to the risk of fire and electric shock.Replaceonlywithpartsrecommendedbythemanufacturer.Beforereturningtheproducttothecustomer,makeleakagecurrentorresistancemeasurementstodeterminethatexposedpartsareacceptablyinsulatedfromthesupplycircuit.REFERENCENO.PARTNUMBERDESCRIPTIONF1*AH5100-2510-1CFuse 250mA250VTimeLagUL/CSAF2*AH5120-0061-0Fuse12A250VTimeLag6.3x32mm UL/CSAF1*C5120-0035-0Fuse100mA250VTimeLagLBCVDE/SEMKOF2*C5120-0025-0Fuse6.3A250VTimeLagHBCVDE/SEMKO*AH:NorthAmericanmodelonly*C :Europeanmodelonly!2RadioFans.CN 收音机爱 好者资料库The graphic symbol of a lightning flash with an arrow pointwithin a triangle signifies that there is dangerous voltagewithin the unit and it posses a hazard to anyone removingthe cover to gain access to the interior of the unit.Onlyqualified service personnel should make such attempt.The graphic symbol of an exclamation point withinan equilateral triangle warns a user of the devicethatitis necessary to refer to the instructionmanual and its warnings for proper operation ofthe unit.REAR PANEL CONNECTIONSFRONT PANEL CONTROLS1. POWER SWITCH4. VOLUME CONTROL7. TAPE MONITOR INDICATOR2. INFRA-RED RECEIVER5. INPUT SELECTOR8. INFRA-RED INDICATOR3. TAPE MONITOR6. INPUT INDICATOR9. POWER INDICATOR1. RIGHT BALANCED CD INPUT6. LEFT TAPE INPUT/OUTPUT11. AC INLET2. RIGHT VIDEO INPUT7. LEFT TUNER INPUT12. LEFT SPEAKER OUTPUT3. RIGHT AUX INPUT8. LEFT AUX INPUT13. GROUND TERMINAL4. RIGHT TUNER INPUT9. LEFT VIDEO INPUT14. RIGHT SPEAKER OUTPUT5. RIGHT TAPE INPUT/OUTPUT10. LEFT BALANCED CD INPUT15. NAD LINK INPUT/OUTPUTFRONT PANEL / REAR PANEL VIEW123456789101112131415Dual Mono Integrated Amplifier S300NADTAPE MONITORTUNERIRCDAUXVIDEO1234567893Measured in accordance with EIA Standard RS-490 (IHF-A-202) 1978.Physical specificationsContinuous average power output at 8100W (20dBW)Input impedanceSingle ended10KBalanced20KSensitivity350mVSignal-to-Noise ratio (A-weighted)ref. 1W88dBFrequency response20Hz - 20kHz+/-0.1dB-3dBGain tracking error+/-0.1 at maximum+/-3dB at -60dB levelDamping factor110Dimensions (W x H x D)450 x 160 x 400 mmNet 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 - 250kHzSPECIFICATIONS4ALIGNMENT PROCEDUREIDLE CURRENT ALIGNMENT (no load, no signal)1. Connect a digital millivoltmeter between TP301 and TP303, and adjust P501 toobtain a reading of between 30mV and 35mV.2. Transfer the digital millivoltmeter to TP302 and TP304 and adjust P502 to obtain areading of between 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 to35mV on each channel.ADJUSTMENT POINTSTP303TP301P501ALIGNMENTTOOLTP304TP302P502ALIGNMENTTOOLLEFT POWER AMP PCBRIGHT POWER AMP PCB5WIRING DIAGRAMNLJK203REDWHITEBLACKBLACKJK205REDBLACKJK207REDBLACKJK209REDBLACKJK212JK210JK208JK206JK204REDREDREDREDREDBLUEBLACKBLACKBLACKBLACKBLACKBLACKJK211REDBLACKGRAYBLACKBLACK(X6)BLACK(X6)J402J403J40411GROUND TERMINALAC INLETTRANSFORMER - LEFTTRANSFORMER - RIGHTPOWER SWITCH-LEFT+SPEAKERTERMINALS+ RIGHT -SPEAKERTERMINALSJ532J531J313J314J327+50V+50V-50VSPKSPKGND LGND RJ328-50VJ318J317J518J517J316J315J516J515J320J319J520J519J326J325J526J525J324J323J524J523J322J321J522J521J307YEL/GRNYEL/GRNJ302J301ORANGEORANGEWHITEWHITEWHITEWHITEBLUEBLUEBLUEBLUEREDREDREDREDREDBLACKBLACKBLACKBLACKBLACKBROWNBROWNREDBLACKBROWNBROWNJ304J303GRAYGRAYJ310J309ORANGEORANGEJ308J36J36J21 J22 J11 J12J46J46J55J55J54J54J53J53J52J52J51J51J35J35J45J45J34J34J44J44J33J33J43J43J32J32J42J42J31J31J41J41REDREDWHITEWHITEPRIMARY - 120V VERSIONPRIMARY - 120V VERSIONPRIMARY - 230V VERSIONPRIMARY - 230V VERSIONJ401122526J7J102121225262526MAIN BOARDNAD LINK BOARDLEFT POWERAMP BOARDRIGHT POWERAMP BOARDPOWER SUPPLY BOARDFRONT PANEL BOARDBLUEBLUEWHITEWHITE6IC BLOCK DIAGRAM21387654+-OFFSET NULLOFFSET NULLNCOUTPUTINVERTINGINPUTNON-INVERTINGINPUTV-V+12345671011121314151689IN 1IN 2IN 3IN 4IN 5IN 6IN 7GNDOUT 1OUT 2OUT 3OUT 4OUT 5OUT 6OUT 7COMMON FREEWHEELING DIODES213876541A1E1K2C2A2E2K1C12345678910111213141A1B1Y2A2B2YGNDVCC4B4A4Y3B3A3Y1234567891011121314OUTPUT 1INVERTINGINPUT 1NON-INVERTINGINPUT 1V+CCNON-INVERTINGINPUT 2INVERTINGINPUT 2OUTPUT 2OUTPUT 4INVERTINGINPUT 4NON-INVERTINGINPUT 4VCC-NON-INVERTINGINPUT 3INVERTINGINPUT 3OUTPUT 3- +- +- +- +INPUT LOGIC12345678910V1CCV1CCOUT 2IN 1GNDGNDIN 2OUT 1V 2CCV2CC21387654+-OUTPUT AOUTPUT BINVERTINGINPUT AINVERTINGINPUT BNON-INVERTINGINPUT ANON-INVERTINGINPUT BV-V+ABQ209-Q210: AD712JNHIGH PERFORMANCE DUAL OP-AMPQ301-Q302: AD711JNHIGH PERFORMANCE MONO OP-AMPQ319-Q320: TL074CNLOW NOISE QUAD OP-AMPQ401: ULN2003A7 DARLINGTON ARRAYS FOR RELAY DRIVEQ402: LB1642MOTOR DRIVERQ103: 74HCT002-INPUT QUAD NAND GATEQ403: TIL198BDUAL OPTOCOUPLER22NADNADIRIRTAPE MONITORTAPE MONITORTUNERTUNERAUXAUXVIDEOVIDEOCDCDDual Mono Integrated Amplifier S300Dual Mono Integrated Amplifier S3001234563878910101111121213131514161718192022212425232627282728293031323334353637EXPLODED VIEW29EXPLODED VIEW PARTS LISTITEMPART NUMBERDESCRIPTIONQTY.1S300-2002-4FASCIA12S200-2005-2TOP COVER13*AHS300-2004AH-4REAR PANEL 120V13*CS300-2004C-4REAR PANEL 230V14S300-2003-2BASE PLATE15S300-2003-3RIGHT FRONT HEATSINK16S300-2023-2RIGHT REAR HEATSINK17S300-2013-3LEFT FRONT HEATSINK18S300-2033-2LEFT REAR HEATSINK19S300-2012-4SUBFASCIA110S300-2043-3HEATSINK PLATE211S300-2015-3TOP COVER MOUNTING BAR212S300-2022-3SUBFASCIA BAR213S300-2014-4REAR PANEL BAR214S300-2006-2AINPUT BOARD BAR 1115S300-2006-2BINPUT BOARD BAR 2116S100-2013-2FOOT W/ RUBBER CUSHION417S300-2032-2VOLUME KNOB118S100-2011-310MM POWER BUTTON119S400-2121-16MM INPUT BUTTON520S100-2221-1IRS LENS121S300-0205POWER SWITCH122S300-2052VOLUME BUSHING123S300-2112ISOLATION PLATE124S300-2042-2VOLUME SHAFT125BSK 44 02 40VOLUME COUPLING126PX0690/28AC INLET127WBT-745 BLACKSPEAKER TERMINAL BLACK228WBT-745 REDSPEAKER TERMINAL RED229S300-0202RCA JACK WHITE530S300-0201RCA JACK RED531S300-0206GROUND TERMINAL132TI-65300ATRANSFORMER133S300-0150FRONT PANEL PCB134S300-0100PSU PCB135S300-0151INPUT STAGE PCB136S300-0140LEFT POWER STAGE PCB137S300-0130RIGHT POWER STAGE PCB138S300-0204NAD LINK PCB130NADNADIRIRTAPE MONITORTAPE MONITORTUNERTUNERAUXAUXVIDEOVIDEOCDCDDual Mono Integrated Amplifier S300Dual Mono Integrated Amplifier S30039394041424344454647ITEMPART NUMBERDESCRIPTIONQTY.39311232POLYFOAM1 SET40S300-2010-ACARTON BOX141*AHPOW4POWER CORD NEMA 1-15 POLARIZED141*CPOW2POWER CORD CEE (7) XVII143101-000BNAD LINK CABLE144RC 450REMOTE CONTROL HANDSET145R03BATTERY1 SET46WARRWARRANTY CARD147S300-IMINSTRUCTION MANUAL142101-000AAUDIO CABLE1PACKING DIAGRAM31www.NAD2004 NAD ELECTRONICS INTERNATIONALA DIVISION OF LENBROOK INDUSTRIES LIMITEDAll rights reserved. No part of this publication may be reproduced, stored or transmitted in any form without the written permission of NAD ElectronicsInternational