NAD-D1050-dac-sm 维修电路原理图.pdf

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1、NADSERVICE MANUAL D1050USB DACD1050 USB DACRadioFans.CN 收音机爱 好者资料库TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3-4SPECIFICATIONS.5WIRING DIAGRAM.7-10 PCB LAYOUT.22-29EXPLODED VIEW PARTS LIST CIRCUIT DIAGRAMS.TROUBLE SHOOTING GUIDE A.11EXPLODED VIEW .15-21ELECTRICAL VIEW PARTS LIST.30-39BLOC

2、K DIAGRAM.6TROUBLE SHOOTING GUIDE B.12.13-14.13-14RadioFans.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, BUT

3、MAY LEAD TO YOUR BEING LIABLE 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 S

4、ERVICING, USE AN ISOLATION 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 ADJACEN

5、TCOMPONENT SHORTS. THIS IS 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 PERORIGIN

6、AL DESIGN. BE SURE THAT THE 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 ORDETERIOR

7、ATION TO PARTS AND COMPONENTS. 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

8、 AVOIDED.6. ALL CRITICAL COMPONENTS 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

9、 ALL EXPOSED METALLIC PARTS 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 SENSITIVI

10、TY, IN THEFOLLOWING MANNER; 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 CAPA

11、CITOR. REVERSE THE AC PLUG 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 SYMBOL

12、SSUBJECT : TIPS ON PROPER 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 RAD

13、IATORS WHERE STEAMLEAKAGE 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

14、 FACTORYAPPROVED MOUNTING 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 I

15、NSTALLATIONS.5. CAUTION CUSTOMERS 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

16、 ACROSS THRESHOLDS OR DEEPPILE 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 CUST

17、OMERS AGAINST THE USE OF EXTENSIONCORDS, 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 “DANG

18、EROUS VOLTAGE” WITHIN THEPRODUCTS 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 ACCO

19、MPANYING THE APPLIANCE.3SERVICING 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 saf

20、ety precautions in this publication, 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) Disco

21、nnecting or reconnecting any 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

22、spray chemicals on or near 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

23、otherwise in this service 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-s

24、tate device heat sinks arecorrectly 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 a

25、nd turn thepower on. Connect 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, In

26、putterminals, Earphone jacks, 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 f

27、ield effect transistors andsemiconductor 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 electrostaticcharg

28、e on your body by touching 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,pl

29、ace the assembly on a conductive 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 “an

30、ti-static” can generateelectrical 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

31、it. (Mostreplacement ES devices 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 ci

32、rcuit assembly into which 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 clot

33、hes fabric or the lifting of your foot from acarpeted floor can generate static electricity sufficient to damagean ES device.)4Specifi cationsD 1050SOURCEAUDIO SPECIFICATIONSUSBCOAXIALOPTICALMaximum Output Level 2.0V2.0V2.0VSignal/Noise Ratio (A-weighted)115dB115dB115dBCrosstalk (1kHz)110dB120dB120d

34、BCrosstalk (10kHz)105dB105dB130dBFrequency Response (20Hz - 20kHz)0.5dB0dB to -0.3dB0dB to -0.3dBTotal Harmonic Distortion0.001%0.0006%0.0006%IMD (SMPTE)0.005%0.005%0.005%IMD (CCIF)0.003%0.003%0.003%GENERALStandby Power0.5WSupports bit rate/sample rateup to 24/192Unit Dimension (WxHxD) - Gross*58 x

35、186 x 208mm2 5/16 x 7 3/8 x 8 1/4” *Net Weight1kg (2.2lb)Shipping Weight2.1kg (4.6lb)* 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, custom installers,cab

36、inet 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.5USB switchXMOS USB2.0 AUDIOAsynchronousMicro controllerUsb upgradeDACLocal Clock generatorUltra low jitterHeadphone AMPHP OUT3.5mmCS439

37、8DiscreteIIS AudioAnalog audio16-300ohmheadphone outLine outIIC/SPI/GPIOSPISPIGPIOProtect circuitPSUDC/DC + LDO5V 2A DC INPUTAnalog supplyDigital SupplyType BVOLUMEIRLEDSTBYFPP BOARDSPI GPIO3V3DSOURCEVOLUMEPIC24FJ128GB106COAX 1COAX 2OPTO1OPTO2SPDIF INSPDIFRXAK4118AIIS switchVolume ControlLM1972SPIBA

38、L OUTSE OUTMUTEBLOCK DIAGRAM6WIRING DIAGRAM7PCU_WAKEPCU_GATEPCU_CLKPCU_VDDPCU_VDDIOTRST_NTDITCKTMSPLL_AGNDDEBUG_NPLL_AVDDCLKMODE4:0RST_NPCUPLLThread 4Thread 0Thread 1Thread 2Thread 5Thread 6Thread 7Thread 332 Channel EndsBoot ROMJTAGSwitchSwitch7 Synchronizers6 Clock Blocks10 Timers4 Locks1H1G1I1J1L

39、1N1M1O1P1D1C1E1A1KX0D14X0D15X0D20X0D16X0D17X0D18X0D19X0D01X0D02X0D03X0D08X0D09X0D04X0D05X0D06X0D07X0D10X0D11X0D12X0D13X0D22X0D23X0D001F1BX0D21X0D51X0D52X0D53X0D54X0D55X0D57X0D58X0D61X0D62X0D63X0D64X0D65X0D66X0D69X0D70X0D49X0D50X0D68X0D67X0D26X0D27X0D32X0D33X0D28X0D29X0D30X0D31X0D34X0D35X0D36X0D37X0D

40、38X0D39X0D42X0D43X0D24X0D25X0D41X0D40X0D5664KB SRAM8KB OTPSecurity RegisterGNDOTP_VCCVDDVDDIOXLDXLCALXBLXA8t roPB8t roPPort 8DPort 8CPort 4FPort 4EPort 4DPort 4CPort 4APort 4BPort 16APort 32APort 16BXS1-L01A-TQ128MAIN BOARD8 Input Selector ClockRecovery Clock Generator DAIF DecoderAC-3/MPEGDetectDEM

41、P I/F Audio I/F XtalOscillatorPDN ”L”=S/P0TNILRCKBICKSDTODAUXMCKO2XTOXTIRAVDD AVSS CDTICDTOCCLKCSNDVDD DVSS TVDD MCKO1IIC RX0 RX1 RX2 RX3 RX4 RX5 RX6 RX7 DITTX0 Error &Detect STATUSINT1Q-subcodebufferTX1 B,C,U,VOUT 8 to 3 VIN GP0,1,2,3,4,5,6,7 Serial Control Mode Input Selector ClockRecovery Clock G

42、enerator DAIF DecoderAC-3/MPEGDetectDEMAudio I/F XtalOscillatorPDN ”H”=S/P0TNILRCKBICKSDTODAUXXTOXTIRAVDD AVSS CM1CM0OCKS1OCKS0DVDD DVSS TVDD IPS1 RX0 RX1 RX2 RX3 IPS0 DIF0 DIF1 DIF2 DITTX0 Error &Detect STATUSINT1TX1 B,C,U,VOUT 4 to 2 VIN MCKO2MCKO1 Parallel Control Mode 9MAIN BOARDAL4118A10Instruc

43、tionDecode &Control16PCH PCL16Program Counter16-Bit ALU2324Data BusInst Register 16DivideSupportInst Latch16EA MUXRead AGUWrite AGU 16 168InterruptControllerPSV & TableData AccessControl BlockStackControl LogicRepeatControlLogicData LatchData RAMAddressLatchAddress LatchProgram MemoryData Latch 16Ad

44、dress BusLiteral Data23Control Signals 16 1616 x 16W Reg ArrayMultiplier17x17OSCI/CLKIOSCO/CLKOVDD,TimingGenerationVSSMCLRPower-upTimerOscillatorStart-up TimerPower-onResetWatchdogTimerBOR andPrecisionReferenceBand GapFRC/LPRCOscillatorsRegulatorVoltageVDDCORE/VCAPENVREGPORTA(1)PORTC(1)(13 I/O)(8 I/

45、O)PORTB(16 I/O)PORTD(1)(16 I/O)Comparators(3)Timer2/3(3)Timer1RTCCICADC10-BitPWM/OCSPII2CTimer4/5(3)PMP/PSP1-9(3)ICNs(1)UARTLVD(2)REFOPORTE(1)PORTG(1)(10 I/O)(12 I/O)PORTF(1)(9 I/O)1/2/3(3)1/2/31/2/3/4(3)1-9(3)CTMUUSB OTGPIC24FJ128GB106MAIN BOARDYESCheck AdaptorCheck m ain Board5V RIGHT?Change Adapt

46、orYESNONOAm ber LED ON?No Power or Power shuts offim m ediately3V3S RIGHT?NONOShort circuit of 3V3s?Replace U105Check U100 U101 U103 U104Change FPP boardYESCheck U103Change Touch boardYESFront panel and topSPI signal to FPPYESNOYESshort circuit on 5VD 3V3D?YESNO5VD correct?YESYESNOcorrect?Check U624

47、Check U626 U408Check Q611 Q612 Q613NONOCheck U103Display sam ple rateBCheck J400Check U499Check U400 U401Check Touch board and cableTouch Power keyLEDs turn white?Connect USB cable to com puterCom puter found hardwareand D1050Check driver on com puterTROUBLE SHOOTING GUIDE A11YESCheck IIS signal to

48、U612Correct?YESCheck U624NONOB1/4 FS signal to M CUNONOM CLK correct?Check U618 U622Check IIS bufferCheck U203YESCheck U612Check Q600 Q601 m ute circuitYESPlay 1Khz sinewave trackYESNOHeadphone outputcorrect?YESCheck U612NONOCheck U604 U204 U606 U609Check IIS_sel signalCheck U400FinishCheck U301Chan

49、ge headphone AM P m oduleCheck U600Check RL600 RL601Line Output correct?Apply signal to coax or opticalOutput correct?Check output LPF circuitYES+/-12V 3V3DM ute relay openAfter 5-8S?Correct?TROUBLE SHOOTING GUIDE B12134612111095872D1050 PART LISTITEMPART NO.PART NAMEQTYREMARK177-351001-1TOP PANEL12

50、70-351003-1BADGE1367-351002-0CREAR PLATE1470-351002-2INNER PLATE1570-351004-0HEAT SINK1666-351003-1U TYPE BRAKCET1766-351002-0VENT PLATE2875-351002-0ROUND COVER4977-351002-1BOTTOM COVER110J71-325002-0KNOB_SEC11176-351001-0BFROTN PANEL11275-351001-0LED BRACKET1EXPLODED VIEW131234567891011131214ITEMPN