NAD-D3020-int-sm 维修电路原理图.pdf

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1、NADSERVICE MANUAL D3020 Hybrid Digital AmplifierrRadioFans.CN 收音机爱 好者资料库TABLE OF CONTENTS DESCRIPTION PAGE SERVICE CAUTION.3-4SPECIFICATIONS.5WIRING DIAGRAM.6 BLOCK DIAGRAM. .7-10 .12-21 PCB LAYOUT.22-29ELECTRICAL PARTS LIST.30-50 EXPLODED VIEWS 51-52EXPLODED VIEW PARTS LISTS 51-52 CIRCUIT DIAGRAMST

2、ROUBLE SHOOTING GUIDE.11RadioFans.CN 收音机爱 好者资料库PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT INANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONSWITHOUT MANUFACTURERS APPROVAL. UNAUTHORIZEDMODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUTMAY LEAD TO YOUR BEING LIA

3、BLE FOR ANY RESULTINGPROPERTY DAMAGE OR USER INJURY.SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOUARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWINGSAFETY CHECKS AND SERVICING GUIDELINES. TO DOOTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDSAND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION

4、 TRANSFORMER FORPROTECTION FROM AC LINE SHOCK.SAFETY CHECKSAFTER THE ORIGINAL SERVICE PROBLEM HAS BEENCORRECTED. A CHECK SHOULD BE MADE OF THEFOLLOWING.SUBJECT : FIRE & SHOCK HAZARD1. BE SURE THAT ALL COMPONENTS ARE POSITIONED INSUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENTCOMPONENT SHORTS. THIS IS

5、 ESPECIALLY IMPORTANTON THOSE MODULES WHICH ARE TRANSPORTED TO ANDFROM THE REPAIR SHOP. 2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVEDEVICES SUCH AS INSULATORS, BARRIERS, COVERS,SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, ANDOTHER HARDWARE HAVE BEEN REINSTALLED PERORIGINAL DESIGN. BE SURE THAT TH

6、E SAFETY PURPOSEOF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLECOLD SOLDER JOINTS, SOLDER SPLASHES OR SHARPSOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSEFOREIGN PARTICLES.4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE ORDETERIORATION TO PARTS AND COMPONE

7、NTS. FORFRAYED LEADS, DAMAGED INSULATION (INCLUDING ACCORD). AND REPLACE IF NECESSARY FOLLOW ORIGINALLAYOUT, LEAD LENGTH AND DRESS.5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVINGTUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEADTENSION AROUND PROTRUDING METAL SURFACES MUSTBE AVOIDED.6. ALL CRITICAL C

8、OMPONENTS SUCH AS FUSES,FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BEREPLACED WITH EXACT FACTORY TYPES, DO NOT USEREPLACEMENT COMPONENTS OTHER THAN THOSESPECIFIED OR MAKE UNRECOMMENDED CIRCUITMODIFICATIONS.7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM ANAC LEAKAGE TEST ON ALL EXPOSED METALLIC PART

9、S OFTHE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNATERMINALS. HANDLE AND SCREWS) TO BE SURE THE SETIS SAFET TO OPERATE WITHOUT DANGER OF ELECTRICALSHOCK. DO NOT USE A LINE ISOLATION TRANSFORMERDURING THIS TEST USE AN AC VOLTMETER, HAVING 5000OHMS PER VOLT OR MORE SENSITIVITY, IN THEFOLLOWING MANNER

10、; CONNECT A 1500 OHM 10 WATTRESISTOR, PARALLELED BY A .15 MFD, 150V AC TYPECAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND(WATER PIPE, CONDUIT, ETC.) AND THE EXPOSEDMETALLIC PARTS, ONE AT A TIME. MEASURE THE AC VOLTAGE ACROSS THE COMBINATIONOF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE AC PLUG

11、 AND REPEAT AC VOLTAGEMEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUEEXCEEDING THIS LIMIT CONSTITUTES A POTENTIALSHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.SUBJECT : GRAPHIC SYMBOLSSUBJECT : TIPS ON PROPER

12、INSTALLATION1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS,CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVEROR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATEDAIR FLOW.2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS:OUTDOOR PATIO INSTALLATIONS WHERE DEW IS AFACTOR, NEAR STEAM RADIATORS WHERE STEAMLEAKAGE

13、IS A FACTOR, ETC.3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCTREAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THEUSE OF DECORATIVE SCARVES OR OTHER COVERINGSWHICH MIGHT OBSTRUCT VENTILATION.4. WALL AND SHELF MOUNTED INSTALLATIONS USING ACOMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORYAPPROVED MOUNTING

14、INSTRUCTIONS A PRODUCTMOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITSORIGINAL FEET (OR THE EQUIVALENT THICKNESS INSPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSSTHE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERSMUST NOT TOUCH ANY PARTS OR WIRING. PERFORMLEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.5. CAUTION CU

15、STOMERS AGAINST THE MOUNTING OF APRODUCT ON SLOPING SHELF OR A TILTED POSITION,UNLESS THE PRODUCT IS PROPERLY SECURED.6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLEON ITS MOUNTING TO THE CART. CAUTION THECUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CARTWITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP

16、PILE CARPETS.7. CAUTION CUSTOMERS AGAINST THE USE OF A CART ORSTAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERSLABORATORIES, INC. FOR USE WITH THEIR SPECIFICMODEL OF TELEVISION RECEIVER OR GENERICALLYAPPROVED FOR USE WITH T.V.S OF THE SAME ORLARGER SCREEN SIZE.8. CAUTION CUSTOMERS AGAINST THE USE OF E

17、XTENSIONCORDS, EXPLAIN THAT A FOREST OF EXTENSIONSSPROUTING FROM A SINGLE OUTLET CAN LEAD TODISASTROUS CONSEQUENCES TO HOME AND FAMILY.THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN ANEQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THEPRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” WITHIN THEP

18、RODUCTS ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TOCONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE ISINTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANTOPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THELITERATURE ACCOMPANYING THE APPLIANCE.3SE

19、RVICING PRECAUTIONSCAUTION : Before servicing the A/V Receiver covered by thisservice data and its supplements and addends, read and follow theSAFETY PRECAUTIONS. NOTE : if unforeseen circumstancescreate conflict between the following servicing precautions and anyof the safety precautions in this pu

20、blication, always follow the safetyprecautions.Remember Safety First:General Servicing Precautions1. Always unplug the A/V Receiver AC power cord from the ACpower source before:(1) Removing or reinstalling any component, circuit board,module, or any other assembly.(2) Disconnecting or reconnecting a

21、ny internal electrical plug orother electrical connection.(3) Connecting a test substitute in parallel with an electrolyticcapacitor.Caution : A wrong part substitution or incorrect polarity installationof electrolytic capacitors may result in an explosion hazard.2. Do not spray chemicals on or near

22、 this A/V Receiver or any of itsassemblies.3. Unless specified otherwise in this service data, clean electricalcontacts by applying an appropriate contact cleaning solution tothe contacts with a pipe cleaner, cottontipped swab, orcomparable soft applicator.Unless specified otherwise in this service

23、data, lubrication ofcontacts is not required.4. Do not defeat any plug/socket B+ voltage interlocks with whichinstruments covered by this service manual might be equipped.5. Do not apply AC power to this A/V Receiver and/or any of itselectrical assemblies unless all solid-state device heat sinks are

24、correctly installed.6. Always connect test instrument ground lead to the appropriateground before connecting the test instrument positive lead. Alwaysremove the test instrument ground lead last.Insulation Checking ProcedureDisconnect the attachment plug from the AC outlet and turn thepower on. Conne

25、ct an insulation resistance meter(500V) to theblades of the attachment plug. The insulation resistance betweeneach blade of the attachment plug and accessible conductive parts(Note 1) should be more than 1M-ohm.Note 1 : Accessible Conductive Parts including Metal panels, Inputterminals, Earphone jac

26、ks, etc.Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily bystatic electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical Esdevices are integrated circuits and some field effect transistors an

27、dsemiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component orsemiconductor-equipped assembly, drain off any electrostaticcharge on your body by touching

28、 a known earth ground.Alternatively, obtain and wear a commercially availabledischarging wrist strap device, which should be removed forpotential shock reasons prior to applying power to the unit undertest.2. After removing an electrical assembly equipped with ES devices,place the assembly on a cond

29、uctive surface such as aluminumfoil, to prevent electrostatic charge buildup or exposure of theassembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESdevices.4. Use only an antistatic solder removal device. Some solderremoval devices not classified a “anti-static” can generateele

30、ctrical charges sufficient to damage ES devices.5. Do not use freonpropelled chemicals. These can generateelectrical charge sufficient to damage ES devices.6. Do not remove a replacement ES device from its protectivepackage until immediately before you are ready to install it. (Mostreplacement ES de

31、vices are packaged with leads electricallyshorted together by conductive foam, aluminum foil, orcomparable conductive material).7. lmmediately before removing the protective material from theleads of a replacement ES device, touch the protective material tothe chassis or circuit assembly into which

32、the device will beinstalled.Caution : Be sure no power is applied to the chassis or circuit, andobserve all other safety precautions.8. Minimize bodily motions when handing unpackaged replacementES devices. (Normally harmless motion such as the brushingtogether of your clothes fabric or the lifting

33、of your foot from acarpeted floor can generate static electricity sufficient to damagean ES device.)4* Gross dimensions include extended buttons and rear panel terminals.* Non-metric measurements are approximate. NAD Electronics will not assume any liability for errors being made by retailers, custo

34、m installers, cabinet makers, or other end users based on information contained in this document.Note: Installers should allow a minimum clearance of 55mm for wire/cable management.Specifi cationsAUDIO SPECIFICATIONSD 3020Rated Power at 8 ohms2 x 30 WattsIHF Dynamic Power 8 ohms2 x 65 Watts 4 ohms2

35、x 105 Watts 2 ohms2 x 150 WattsSignal/Noise Ratio (A-weighted)90dBChannel Separation 1kHz 10kHz75dB65dBChannel Balance0 0.3dBFrequency Response (20Hz - 20kHz)0dB to -0.3dBTotal Harmonic Distortion0.005%Maximum input level5VIMD (SMPTE)0.02%IMD (CCIF)0.003%GENERAL SPECIFICATIONS Standby Power0.5 Watts

36、Supports bit rate/sample rateup to 24/192 (via Digital Audio input)up to 24/96 (via Computer/Type B USB input)Unit Dimensions (W x H x D) Gross* 58 x 186 x 219mm2 5/16 x 7 3/8 x 8 5/8” *Net Weight1.38kg (3.05lb)Shipping Weight2.1kg (4.6lb)56COAXOPTONJW1194Volume CONTROLERR CH OPTRIG INLOGICMAIN PSUS

37、tandby PSU(PI LNK624)5V 1AMAIN LMAIN NMain MCUPIC24F64GB106BLOCK DIAGRAMPlug in senserSPDIFSPDIFVOLUMEGPIOIRFRONT PANEL CONTROLstandby (0.2W dissipation )PSU BOARD3.5MM jack(OPTO+ANA)SPDIFDigital VolumeIISIIS2X50W 4ohmUCD102 AMPBUFFERAC INLETLPLNRPRNSPII2CGPIOUSBUSBUSB AUDIOTAS1020LEDSTBYFPP BOARDII

38、S SWITCHNC7SV157 X 7IISRail Detection32V5 ONAC DETUSB SWITCHTS3USB221USB FOR ServiceI2CSPISPILDOAMS11173V3SLDO78055VA3V3D3V3S3V3D3V3D3V3D3V3DL CH OP2X35W 8ohmGain 13.5dBClipping controlNE5532LPRPHP OUTNE5532HP OUT+/-12VAnalog in RCABluetooth ModuleUARTNAD designSPI5VA3V3DLPFNE55322XL&RL&RL&RL&R+/-35

39、V 3.2A; 10A Peak(half cycle )7815/7915+/-20V+/-15VLM317/337+/-7V+15VCP+/-7V+/-7VCS42528CodecDigital audio receiverADC RDAC4ADC LDAC 6DAC 1DAC 3DAC 5DAC 7DAC 2DAC 0IISIISAnalog GainGPIOSOURCESignal detect1XTL084L&RSignal detTONE ControlClipping Control1XTL084+/-35VCurrent sense12VDR-20V(VDR)+/-20V 0.

40、2ALDOAMS1117MOS-switchAPM2313GPIO5VS5VS5VDBASS ON5VDIISMUTECRYSTAL6MHzCRYSTAL22.5792MHzCRYSTAL24.576MHzSwitch Frequency 500KHz7RSTRXP0RXP1/GPO1AD0/CSSCL/CCLKSDA/CDOUTAD1/CDINVLCAOUTA1+AOUTA1-AOUTB1+AOUTA3+AOUTA3-AOUTA2-AOUTB2-AOUTA2+AOUTB2+AOUTB1-AOUTB3+AOUTB3-AOUTA4+AOUTA4-AOUTB4+AOUTB4-AINL+AINL-A

41、INR+AINR-FILT+REFGNDVQRefADC#1ADC#2Digital FilterDigital FilterGain & ClipGain & ClipCX_SDOUTADCIN1ADCIN2CX_SCLKCX_LRCKCX_SDIN4CX_SDIN3CX_SDIN2CX_SDIN1VLSSAI_LRCKSAI_SCLKSAI_SDOUTDGNDVDOMCKRMCKLPFLTTXPINTRxClock/DataRecoveryS/PDIFDecoderDEMSerialAudioInterfacePortC&U BitData BufferControlPortDAC#1DA

42、C#2DAC#3DAC#4DAC#5DAC#6DAC#7DAC#8Digital FilterVoluCemontrolDGNDRXP2/GPO2RXP3/GPO3RXP4/GPO4RXP5/GPO5RXP6/GPO6RXP7/GPO7VDMUTECGPOMUTEAnalog FilterVARXAGNDADCSerialDataAGNDVAInternal MCLKCODECSerialPortMult/DivFormatDetectorCS42528PREAMP BOARD8In A1In A2In A3In A4In B1In B2In B3In B4BiasTONETONEBch To

43、ne FilterV+ GND VOutAch Tone FilterV-ADR0ADR1DATACLOCKHCTALControl LogicZero Cross DetectionOutBOutANJW1194PREAMP BOARD98052 CoreI2CControl8K ROM6016 Byte RAMUSB SerialOSCPLLACGSuspend/ResumeLogicI2C BusCPortPort3Port1USBSOF6 MHzInterfaceEngineCODECInterface1520 ByteSRAMUBMDMAGlobalControl/StatusReg

44、istersTAS1020APFBPREAMP BOARD10TROUBLESHOOTING GUIDEConnect AC Cord from D3020IS THE AMBER LED LIGHTED?NOYESIS IT RED?CHECK THE 5V SUPPLY CIRCUITCHECK THE LED CONTROL CIRCUIT,AND PROTECET CIRCUITYESTHE UNIT WORK NORMALLY?CAN PRESSING STB TOUCH KEY MAKENOARE ALL POWER SUPPLIES OK?CHECK THE 5V SUPPLY

45、CIRCUITNOYESIS THE AMBER LED WHITE?YESIS THE STANDBY SINGAL LOWCHECK THE PROTECT CIRUITCHECK THE STANDBY CONTROLYESNOYESSOURCE KEY IS USELESS?YESCHECK MCU CONTROL CIRCUITNOCHECK TOUCH BOARD ANDTHE CONNECTORSYESIS THE SPK OUT NORMAL?NOIS THE OUTPUT DC LEVEL NORMAL?CHECK PREAMP OUT DC ORUcD102 MODULE

46、BROKEN?IS THERE SIGNAL OUTPUT?YESYESNOCHECK UcD102 MODULE IS UcD102 MODULE INPUTSEYONNORMAL?CHECK THE MUTE CONTROLIS THE MUTE SIGNAL OFF?YESCHECH NJW1194 AND PREAMPIS NJW1194 OUTPUT NORMAL?YESCHECK CS42528S FILTER CIRCUITIS CS42528 OUTPUT NORMAL?YESCIRCUITNONONONOAMP CIRCUITCHECK CS42528 AND ITS INP

47、UT CIRCUITIS THE THD HIGH OR ABNORMALYESIS IT WHITE?CHECK TOUCH BOARD OR SOFTWARE ERRORWAVEFORM?OPEN THE UNIT FOR OVERALLCHECKIS IR NORMAL?CHECK THE IR CONTROL CIRCUITIS Bluetooth NORMAL?CHECK Bluetooth CONNECTION OR MODULEIS 12V TRIGGER NORMAL?CHECK 12V OUT CONTROL CIRCUITIS HEADPHONE O/P NORMAL?CH

48、ECK HEADPHONE CIRCUIT OR CONNECTIONIS UP GRADE KEY NORMAL?IS BASS ON/OFF NORMAL?YESCHECK TRIG BOARD OR MCUCHECK BASS CONTROL CIRCUITOKNONONONONOYESYESYESYESYESYESNOYESYESNO11C379100nR36933RC3784U7R3644R7RX13V3DAR36275RAGNDRX0INPUT1C357100n X7RVCC1GND2DATA3J112GP1FRXC3621nFAGND135462T300SPDIF 1:1AGND

49、CX_SDIN11CX_SCLK2CX_LRCK3VD4DGND5VLC6SCL/CCLK7SDA/CDOUT8AD1/CDIN9AD0/CS10INT11RST12AINR-13AINR+14AINL+15AINL-16VQ17FILT+18REFGND19AOUTB4-20AOUTB4+21AOUTA4+22AOUTA4-23VA24AGND25AOUTB3-26AOUTB3+27AOUTA3+28AOUTA3-29AOUTB2-30AOUTB2+31AOUTA2+32AOUTA2-33AOUTB1-34AOUTB1+35AOUTA1+36AOUTA1-37MUTEC38LPFLT39AG

50、ND40VARX41RXP7/GPO742RXP6/GPO643RXP5/GPO544RXP4/GPO445RXP3/GPO346RXP2/GPO247RXP1/GPO148RXP049TXP50VD51DGND52VLS53SAI_SDOUT54RMCK55CX_SDOUT56ADCIN257ADCIN158OMCK59SAI_LRCK60SAI_SCLK61CX_SDIN462CX_SDIN363CX_SDIN264*U3035VAC305220U/6V3 HCNC3142.2U X5R3V3DL3027427926623V3DAC36622U 6V3 X5RC30910NC310100N