Yamaha-DA824-dac-sm 维修电路原理图.pdf

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1、SERVICE MANUALPA 011524HAMAMATSU, JAPAN1.44K-4111 K Printed in Japan 00.05CONTENTSSPECIFICATIONS 3PANEL LAYOUT 4CIRCUIT BOARD LAYOUT 5DIMENTIONS 6BLOCK DIAGRAM 7DISASSEMBLY PROCEDURE 8LSI PIN DESCRIPTION 11IC BLOCK DIAGRAM 13CIRCUIT BOARDS 15INSPECTIONS 27TEST PROGRAM 29FRASH ROM UPGRADE 32PARTS LIS

2、TOVERALL CIRCUIT DIAGRAMDA CONVERTER200005*-110000This document is printed on chlorine free (ECF) paper with soy ink.RadioFans.CN 收音机爱 好者资料库DA8242WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic

3、(whereapplicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possiblyother entities) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REAS

4、ONWHAT SO EVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyesto solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handlingfood.IMPORTANT

5、 NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed thatbasic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood bythe users, and have therefore not been res

6、tated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personalinjury, destruction of expensive components and failure of the product to perform as specified. For thesereasons, we advise all Yamaha product owners that all service required

7、should be performed by an authorizedYamaha Retailer or the appointed service representative.IMPORTANT:This presentation or sale of this manual to any individual or firm does not constitute authorization, certification,recognition of any applicable technical capabilities, or establish a principal-age

8、nt relationship of any form.The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, andservice departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable andchanges in specifi

9、cation are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist,please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yours

10、elf to the ground bus in the unit (heavy gauge black wires connect to this bus).IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to theunit.WARNINGComponents having special characteristics are marked and must be replaced with parts having

11、specification equal to thoseoriginally installed.IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordIMPORTANT.The wires in this main lead are coloured inaccordance with the following code:BLUE:NEUTRALBROWN: LIVEAs the colours of the wires in the main lead of this apparatus may notcor

12、respond with the coloured markings identifying the terminals inyour plug, proceed as follows:The BLUE wire must be connected to the terminal that is marked withthe letter N (or coloured BLACK).The BROWN wire must be connected to the terminal that is markedwith the letter L (or coloured RED).Be certa

13、in that neither core is connected to the earth terminal of thethree pin plug.RadioFans.CN 收音机爱 好者资料库SPECIFICATIONSDA8243MY8-AE, MY8-TDSampling rateMY8-ATDA conversion resolutionFrequency responseDynamic Range *1Gain ErrorTHD *2Hum & Noise Level *1CrosstalkSignal DelayPEAKNOMINALIndicatorsSIGNALLOCKP

14、OWERPower requirementsPower consumptionDimensions (W x H x D)WeightFree-air operating temperatureStorage temperaturePower cord lengthSupplied Accessories39.6950.88 kHz41.01350.88 kHz24-bit linear, 128-times oversampling3, +1 dB, 20 Hz20 kHz110 dB (typical)1 dB 1 kHz0.05%, 20 Hz20 kHz0.01% full scale

15、 output 1 kHz92 dB (typical)70 dB between adjacent channels 1 kHz0.57 ms (digital input to analog output, fs = 48 kHz)3 dB below full scale14 dB below full scale34 dB below full scaleWordclock lockPower on/offU.S.A. & Canada 120 V AC, 60 HzEurope 230 V AC, 50 Hz40 W480 x 97.5 x 366.8 mm (18.9 x 3.84

16、 x 14.44 inches)7.5 kg (16.53 lbs)10 C to 35 C (50 F to 95 F)20 C to 60 C (4 F to 140 F)1.9 mOwners Manual*1. Measured with a 6 dB/octave filter at 12.7 kHz; equivalent to a 20 kHz filter with infinite dB/octave attenuation.*2. 6 dB/octave filter 80 kHz.*Where dB represents a specific voltage, 0 dB

17、is referenced to 0.775 V rms, 0 dBV is referenced to 1.00 V rms.*1. 24-bit 128-times oversampling D/A converters.*2. XLR-type connectors are electronically balanced (pin 1= ground, pin 2= hot, pin 3= cold).*3. TRS phone jacks are electronically balanced (tip= hot, ring= cold, sleeve= ground).*Where

18、dB represents a specific voltage, 0 dB is referenced to 0.775 V rms, 0 dBV is referenced to 1.00 V rms.Analog OutputConnectionGAIN SWActual SourceImpedanceFor UsewithNominalConnectorOutput LevelNominalMax.before clipOUTPUT 18 *1150 lines600 lines+24 dB+18 dB+15 dB+4 dBV+10 dB(2.45 V)+4 dB(1.23 V)+1

19、dB(0.87 V)10 dBV(0.316 V)+24 dB(12.28 V)+18 dB(6.16 V)+15 dB(4.36 V)+4 dBV(1.58 V)XLR-3-32type(balanced)*2&TRS phonejack(balanced)*3Digital I/OConnectionCOMWORD CLOCK INWORD CLOCK THRUSLOTFormatmini YGDAILevel/ImpedanceRS232CTTL, 75 (ON/OFF)TTL, 75 Connector9-pin D-sub (male)BNCBNCONOFFPOWERDA CONVE

20、RTERLOCKPEAKSIGNALNOMINALPEAKSIGNALNOMINAL123456781234SLOTCOMTHRU75INONOFFWORD CLOCKDA CONVERTERMODEL DA824823456782345671OUTPUT(BAL)15678910111 PEAK, NOMINAL & SIGNAL indicators2 LOCK indicator3 POWER indicator4 POWER switch5 COM port6 WORD CLOCK THRU connector7 WORD CLOCK 75 ON/OFF switch8 WORD CL

21、OCK IN connector9 OUTPUT (BAL) connectors10 Power cable11 SLOTPANEL LAYOUTDA8244Front PanelRear PanelDA8245CIRCUIT BOARD LAYOUTDADCPNSWJKMAINMYSL3NC2-V5364503CN004CN905CN902CN003CN001CN011CN962CN961CN963CN010CN008CN009CN005CN006CN002CN007CN002CN102CN101CN301CN501CN701CN302CN502CN702CN901CN904CN052CN

22、053CN054CN051CN906CN003ACMYSLPower TransformerDA8246DIMENTIONS67.567.53454301388H: 97.52 302 3048(33)274355D: 366.8W: 480Unit: mmDA8247WORD CLOCLSELECTIC91744PYM3436DK(DIR2)WORD CLOCLSELECTD.F/DAAK4393IC91844PIC00228PIC101IC102 IC102IC103IC103IC203IC203OUTPUT 1JK101JK102SIGNAL+4dBV15dBU18dBU24dBULPF

23、NOMINALPEAKLOCKSYNC.Fs.64Fs.128Fs.256FsYM3436DK(DIR2)WORD CLOCKINTHRU75IC902IC923SDATAPDVOUTLVOUTRBICKLRCKMCLK657657231231657MUTEMUTEJK201JK202IC201IC202 IC202OUTPUT 2SIGNAL+4dBV15dBU18dBU24dBULPFNOMINALPEAK231231657231657MUTEMUTEJK301JK302D.F/DAAK4393IC00328PIC301IC302 IC302IC303IC303IC403IC403OUTP

24、UT 3SIGNAL+4dBV15dBU18dBU24dBULPFNOMINALPEAKSDATAPDVOUTLVOUTRBICKLRCKMCLK657657231231657MUTEMUTEJK401JK402IC401IC402 IC402OUTPUT 4SIGNAL+4dBV15dBU18dBU24dBULPFNOMINALPEAK231231657231657MUTEMUTEJK501JK502D.F/DAAK4393IC00428PIC501IC502 IC502IC503IC503IC603IC603OUTPUT 5SIGNAL+4dBV15dBU18dBU24dBULPFNOMI

25、NALPEAKSDATAPDVOUTLVOUTRBICKLRCKMCLK657657231231657MUTEMUTEJK601JK602IC601IC602 IC602OUTPUT 6SIGNAL+4dBV15dBU18dBU24dBULPFNOMINALPEAK231231657231657MUTEMUTEJK701JK702JK801JK802D.F/DAAK4393CPUCOMSRAM 256KIC00528PIC909CN903IC901IC926SRAM 256KIC927IC701IC702 IC702IC703IC703IC803IC803OUTPUT 7SIGNAL+4dBV

26、15dBU18dBU24dBULPFNOMINALPEAKSDATAPDVOUTLVOUTRBICKLRCKMCLK657657231231657MUTEMUTEIC801IC802 IC802OUTPUT 8SIGNAL+4dBV15dBU18dBU24dBULPFNOMINALPEAK23232122231231657231657MUTEMUTEKEC-92537RSTMUTELOCKWCLK SLTWCLK BNCA(1-10)D(0-15)TR,RXTR,RXFLASH MEMORY8MIC919LOCKPOWERSYNCFs64Fs128Fs256FsWCLKSDATAA(1-10)

27、D(0-15)TR,RXSLOTMUTEBABASH7042A112PDAJKMAIN1413713,46361511610151825194450,5143878984104,1055647 3232122235647 3232122235647 3232122235647 3BLOCK DIAGRAMDA8248DISASSEMBLY PROCEDUREDAJKTop coverPower transformerIF plate180360180420290380 X16280A400 X14300400: Bind Head Tapping Screw-B A4.0X8 MFZN2BL

28、(VC688800)(Fig. 1)420: Bind Head Screw A4.0X12 MFZN2BL (VP156900) (Fig. 2)350MAIN1.Top Cover1-1Remove the fourteen (14) screws marked 400. The topcover can then be removed. (Fig. 1)2.Circuit Boards and UnitsRemove the top cover, each circuit board and unit canthen be removed.Circuit Board and UnitMA

29、INJKDADC AssemblyPower TransformerA280290300380350360200180ScrewBonding Screw 4.0X8 MFZN2BL (VS154500)Bonding Screw 3.0X6 MFZN2BL (VS863000)Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)Bonding Tapping Screw 3.0X8 MFZN2BL (VN41330)Bonding Tapping Screw 3.0X8 MFZN2BL (VN41330)Bind Head Tapping Sc

30、rew-B 3.0X6 MFZN2BL (EP600230)Bind Head Tapping Screw-B A4.0X6 MFZN2BL (VC688800)Bind Head Tapping Screw-B A4.0X6 MFZN2BL (VC688800)2125166424Ref. No.ScrewQTY222122131Fig.3.MYSL Circuit Board*Note that remove card before following operation.3-1Remove the top cover. (See procedure 1.)3-2Remove the MA

31、IN circuit board. (See procedure 2.)3-3Remove the two (2) screws marked 420. The IF platecan then be removed. (Fig. 2)3-4Remove the four (4) screws marked 250. The OPTassembly can then be removed. (Fig. 3)3-5Remove the two (2) screws marked 240. The MYSLcircuit board can then be removed. (Fig. 3)DA8

32、249250240110 X2Fuse240200DC assemblyOPT assembly200MYSLACAC250240: Bind Head Screw 4.0X8 MFZN2BL (EG340360)250: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)(Fig. 3)60A: Bind Head Tapping Screw-B A4.0X8 MFZN2BL (VC688800) 110: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)(Fig. 4) Rear Panel As

33、sembly60A X34.AC Circuit Board4-1Remove the top cover. (See procedure 1.)4-2Remove the three (3) screws marked 60A and the two(2) screws marked 110. The AC circuit board can thenbe removed. (Fig. 4)*The fuse is not a part of the AC circuit Board. When youreplace the AC circuit board, you should remo

34、ve the fusefrom the board, and put it back into the holder on the newboard.5.DC Circuit Board5-1Remove the top cover. (See procedure 1.)5-2Remove the DC assembly. (See procedure 2.)5-3Remove the four (4) screws marked 60B. The transistorholder can then be removed. (Fig. 5)5-4Remove the three (3) scr

35、ews marked 40. The DC circuitboard can then be removed. (Fig. 5)*The four fuses are not part of the DC circuit Board. Whenyou replace the DC circuit board, you should remove thefuses from the board, and put it back into the holder on thenew board.6.PN Circuit Board and SW Circuit Board6-1Remove the

36、top cover. (See procedure 1.)6-2Remove the six (6) screws marked 130. The right andleft rack mount angles can then be removed. (Fig. 6)6-3Remove the six (6) screws marked 70. The front panelcan then be removed. (Fig. 7)60B40130130130DC40: Bind Head Tapping Screw-B A3.0X8 MFZN2BL (VP157000) 60B: Bond

37、ing Tapping Screw-B 3.0X8 MFZN2BL (VN413300)(Fig. 5)130: Oval Head Screw 4.0X8 MFZN2BL (VS153600) (Fig. 6) DC Assembly4040Transistor holderRack mount angleRack mount angle130FuseFuse70PNSW70: Oval Head Screw 4.0X8 MFZN2BL (VS153600) (Fig. 7)30: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230) 50:

38、Bonding Screw 3.0X6 MFZN2BL (VS863000) 70305050307070Front panel30DA824106-4PN Circuit Board:Remove the four (4) screws marked 30. The PN circuitboard can then be removed. (Fig. 7)6-5SW Circuit Board:Remove the two (2) screws marked 50. The SW circuitboard can then be removed. (Fig. 7)DA82411LSI PIN

39、 DESCRIPTIONPINNO.I/OFUNCTIONNAMEPINNO.I/OFUNCTIONNAME12345678910111213141516171819202122DAUXHDLTDOUTVFLOPTSYNCMCCWCMCBMCASKSYXIXOP256LOCKVssTCDIM1DIM0DOM1DOM0KM1IOOOOOOOOOIIOOOOIIIIIAuxiliary input for audio dataAsynchronous buffer operation flagAudio data outputParity flag outputFs x 1 Synchronous

40、 output signal for DACFs x 1 Synchronous output signal for DSPFs x 64 Bit clock outputFS x 1 Word clock outputFs x 128 Bit clock outputFs x 256 Bit clock outputClock synchronization control inputCrystal oscillator connection or external clock inputCrystal oscillator connectionVCO oscillating clock c

41、onnectionPLL lock flagLogic section power (GND)PLL time constant switching outputData input mode selectionData input mode selectionData output mode selectionData output mode selectionClock mode switching input 123242526272829303132333435363738394041424344RSTNVddaCTLNPCO(NC)CTLPVssaTSTNKM2KM0FS1FS0CS

42、MEXTWDDINLRVddERREMPCD0CCKCLDIIOIIIIOOIIIOOOOIISystem reset inputVCO section power (+5V)VCO control input NPLL phase comparison outputVCO control input PVCO section power (GND)Test terminal. Open for normal useClock mode switching input 2Clock mode switching input 0Channel status sampling frequency

43、display output 1Channel status sampling frequency display output 0Channel status output method selectionExternal synchronous auxiliary input word clockEIAJ (AES/EBU) data inputPLL word clock outputLogic section power (+5 V)Data error flag outputChannel status emphasis control code output3-wire type

44、microcomputer interface dataoutput3-wire type microcomputer interface clock input3-wire type microcomputer interface load inputYM3436DK (XG948E00) DIR2 (Digital Format Interface Receiver)MAIN: IC917, 918PINNO.I/OFUNCTIONNAMEPINNO.I/OFUNCTIONNAME1234567891011121314DVSSDVDDMCLK/PDBICKSDATALRCKSMUTE/CS

45、DFSDEM0/CCLKDEM1/CDTIDIF0DIF1DIF2-IIIIIIIIIIIIDigital groundDigital power supplyMaster clockPower down modeAudio serial data clockAudio serial data inputL/R clockSoft muteDouble speed sampling modeDe-emphasis enableDigital input format1516171819202122232425262728BVSSVREFLVREFHAVDDAVSSAOUTR-AOUTR+AOU

46、TL-AOUTL+VCOMP/SCKS0CKS1CKS2-II-OOOOOIIIISubstrate groundLow level voltage referenceHigh level voltage referenceAnalog power supply +5 VAnalog groundRch negative analog outputRch positive analog outputLch negative analog outputLch positive analog outputCommon voltage outputParallel/serial selectMast

47、er clock selectAK4393-VS-E2 (XW029A00) DAC (Digital to Analog Converter)DA: IC2-5DA82412PINNO.I/OFUNCTIONNAMEPINNO.I/OFUNCTIONNAME1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556PE14PE15VSSA0A1A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16VCCA17VSS/RAS/C

48、ASL/CASHVSSRDWR / PB5A18A19A20PB9 /A21VSS/RD/WDTOVF/WRHVCC/WRLVSS/CS1/CS0PA9 / TCLKD/IRQ2 / TCLKC/CS3/CS2/IRQ1TXDRXD/IRQ0PA1 / TXD0PA0 / RXD0D15D14D13VSSD12OOIOOOOOOOOOOOOOOOOOIOIOOOOOOOOOIOOOIOIOOOIOOIOIIOII/OI/OI/OII/OPort EPort EGroundAddress busPower supplyAddress busGroundRow address strobeColu

49、mn address strobe (low)Column address strobe (high)GroundDRAM read/write / Port BAddress busPort B / Address busGroundReadWatch dog timer overflowHigh writePower supplyLow writeGroundChip selectChip selectPort A / Timer clockInterrupt request / Timer clockChip selectChip selectInterrupt requestData

50、transmissionData receptionInterrupt requestPort A / Data transmissionPort A / Data receptionData busGroundData bus57585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112D11D10D9D8VSSD7D6D5VCCD4D3D2D1D0VSSXTALMD3EXTALMD2NMIVCCMD1MD