Yamaha-EMX860ST-mix-sm 维修电路原理图.pdf

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1、SERVICE MANUALPA01145719990220-99800 1.96K-296 Printed in Japan 99.03HAMAMATSU, JAPAN CONTENTSSPECIFICATIONS. 3/4PANEL LAYOUT. 5CIRCUIT BOARD LAYOUT. 7BLOCK DIAGRAM. 8DISASSEMBLY PROCEDURE. 9LSI PIN DESCRIPTION. 11IC BLOCK DIAGRAM. 11CIRCUIT BOARDS. 12INSPECTION. 15MIDI INPLEMENTATION CHART. 25PARTS

2、 LISTRadioFans.CN 收音机爱 好者资料库EMX860ST2IMPOR TANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumedthat basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and under-st

3、ood by the users, and have therefore not been restated.WARNING :Failure to follow appropriate service and safety procedures when servicing this product may result in per-sonal injury, destruction of expensive components and failure of the product to perform as specified. Forthese reasons, we advise

4、all Yamaha product owners that all service required should be performed by anauthorized Yamaha Retailer or the appointed service representative.IMPORTANT :This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-cation, recognition of any applicabl

5、e technical capabilities, or establish a principal-agent relationship ofany 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. Modificat

6、ions are, therefore, inevitableand changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING :Static discharges can destroy expensive components. Discharge any static electr

7、icity your body mayhave accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connectto this buss.)IMPORTANT :Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply powerto the unit.WARNING: CHEMICAL CONTENT NOTICE!The solder

8、 used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (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 othe

9、r reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSO EVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or exposeeyes to solder/flux vapor!If you come in contact with s

10、older or components located inside the enclosure of this product, wash your hands before handlingfood.WARNINGComponents having special characteristics are marked and must be replaced with parts having specification equal to thoseoriginally installed.LITHIUM BA TTERY HANDLINGThis product uses a lithi

11、um battery for memory back-up.WARNING :Lithium batteries are dangerous because they can be exploded by improper handling. Observe the following pre-cautions when handling or replacing lithium batteries.Leave lithium battery replacement to qualified service personnel.Always replace with batteries of

12、the same type.When installing on the PC board by soldering, solder using the connection terminals provided on the battery cells.Never solder directly to the cells. Perform the soldering as quickly as possible.Never reverse the battery polarities when installing.Do not short the batteries.Do not atte

13、mpt to recharge these batteries.Do not disasemble the batteries.Never heat batteries or throw them into fire.ADVARSEL!Lithiumbatteri-Eksplosionsfare ved fejlagtig handtering. Udskiftning ma kun ske med batteri af samme fabrikat og type. lever det brugtebatteri tilbage til leverandren.VARNINGExplosio

14、nsfara vid felaktigt batteribyte.Anvand samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren.Kassera anvant batteri enligt fabrikantens instruktion.VAROITUSParisto voi rajahtaa, jos se on virheellisesti asennettu.Vaihda paristo ainoastaan laitevalmistajan suosittelemaan

15、tyyppiiin.Havita kaytetty paristo valmistajan ohjeiden mukaisesti.The following information complies with Dutch official Gazette 1995. 45; ESSENTIALS OF ORDER ON THE COLLECTION OF BATTERIES. Please refer to the diassembly procedure for the removal of Back-up Battery. Leest u voor het verwijderen van

16、 de backup batterij deze beschrijving.2RadioFans.CN 收音机爱 好者资料库CH INPUT (Lo-Z)OFF3 k50600 Mics62 dB (616 V)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31(CH16)ON600 Lines32 dB (19.5 mV)20 dB (77.5 mV)+10 dB (2.45 V)typeCH INPUT (Hi-Z)OFF10 k50600 Mics 52 dB (1.95 mV)40 dB (7.75 mV)10 dB (245 mV)Phone jack(CH

17、16)ON600 Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)(TRS)*2MIC INPUT (CH7, 8)3 k50600 Mics62 dB (616 V)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31 type*2LINE INPUT (CH7, 8) (L, R)10 k600 Line22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jackTAPE IN (L, R)10 k600 Line22 dBV (79.4 mV)10 dBV (316

18、mV)+17.8 dBV (7 V)Phono jackAUX IN (L, R)10 k600 Line22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack*3MAIN STEREO: 135 W+135 W/8 0.5% THD at kHz, 200 W+200 W/4 0.5% THD at 1 kHzMAIN BRIDGE: 400 W/8 0.5% THD at 1 kHzMONITOR: 135 W/8 0.5% THD at 1 kHz, 200 W/4 0.5% THD at 1 kHz20 Hz20 kHz +1 dB

19、, 3 dB 1 W output into 8 (POWER AMP OUT)20 Hz20 kHz +1 dB, 3 dB +4 dB output into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT)Less than 0.5% 20 Hz20 kHz, 100 W output into 4 (POWER AMP OUT)Less than 0.3% 20 Hz20 kHz, +14 dB output into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT)125 dB equivalent input nois

20、e, 68 dB residual output noise (POWER AMP OUT)95 dB residual output noise (MAIN OUT, MONITOR OUT, EFFECT OUT)80 dB (MAIN OUT)Master level control: nominal level, All channel level controls: minimum75 dB (MONITOR OUT)Master level control: nominal level, All channel level controls: minimum71 dB (MAIN

21、OUT)Master level control: nominal level, 1 channel level control: nominal level84 dB (EFFECT OUT)Master level control: nominal level, All channel level controls: minimum64 dB (EFFECT OUT)Master level control: nominal level, 1 channel level control: nominal level86 dB CH IN (Lo-Z) to POWER AMP OUT (C

22、H16)66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT (CH16)72 dB CH IN (Lo-Z) to EFFECT OUT (CH16)48 dB CH IN (Lo-Z) to REC OUT (CH16)56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT (CH16)26 dB AUX IN to MAIN OUT24 dB TAPE IN to MAIN OUT66 dB MIC IN to MAIN OUT (CH78)26 dB LINE IN to MAIN OUT (CH78)65 dB adj

23、acent input, 65 dB input to output15 dB MaximumHIGH10 kHz shelvingMID2.5 kHz peakingLOW100 Hz shelving*Turn over/roll-off frequency of shelving: 3 dB below maximum variable level.5 POINTS LED METER (MAIN OUT L/R, MONITOR OUT)7 bands (125, 250, 500, 1k, 2k, 4k, 8k Hz)12 dB Maximum (MAIN OUT, MONITOR

24、OUT)3 types (Vocal, L Hall, S Hall)+48 V is supplied to electrically balanced inputs for powering condenser microphones via 6.8 k currentlimiting/isolation resisters.Comp. : THD 0.5% (MAIN, MONITOR)Turns on. : THD 0.5% (MAIN, MONITOR)DIGITAL EFFECT MUTE : on/offFC5 Foot switchUSA and Canada120 V AC

25、60 HzEurope230 V AC 50 HzOther240 V AC 50 Hz300 W497x324x275 mm17 kgMaximum output powerFrequency responseTotal harmonic distortionHum & noise(Average, Rs=150)(with 20 Hz20 kHz BPF)Maximum voltage gain(PAD: OFF)Crosstalk at 1 kHzInput channel equalizationMetersGraphic equalizerInternal digital effec

26、tPhantom powerLimiterLIMIT indicatorsFoot switchOptional accessoriesPower requirementPower consumptionDimensions (WxHxD)Weight3EMX860STSPECIFICATIONS General specificationsInput connectors Input specificationsActual loadimpedanceInput levelSensitivity*1Nominal levelMax. beforeclipingConnectortypePAD

27、NominalimpedanceMAIN AMP OUT (L, R) (A, B)0.14/8 Speaker37.7 W/4(200 W/4)Phone jackMAIN BTL OUT0.18 Speaker75.4 W/8(400 W/8)Phone jackMONITOR AMP OUT (A, B)0.18 Speaker37.7 W/4(200 W/4)Phone jackMAIN OUT (L, R)60010 k Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jackMONITOR OUT60010 k Lines+4 dB (1.23 V)

28、+20 dB (7.75 V)Phone jackEFFECT OUT60010 k Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jackREC OUT (1, 2)60010 k Lines10 dBV (316 mV)+10 dBV (3.16 V)Phono jackOutput connectors Output specificationsActual sourceimpedanceOutput levelNominalMax. before clipingConnector typeNominalimpedance All output jack

29、s are unbalanced. 0 dB=0.775 Vrms, 0 dBV=1 Vrms.Specifications are subject to change without prior notice.*1. Sensitivity is the lowest level that can produce an output of +4 db (1.23 V) or the nominal output level when the unit is set at maximum gain.*2. Balanced.*3. Unbalanced. 0 dB=0.775 Vrms, 0

30、dBV=1 Vrms.4EMX860STEMX860ST5123456Equalizer controls (HIGH, MID, LOW)Monitor controls (MONI)Effect control (EFFECT)PAN control (BAL/PAN control for CH7/8)Level control (LEVEL)Pad switch (PAD) (1-6 only)PANEL LAYOUT010LR15+1515+1515+1501001011LEVELLOWPADMONIPANEFFECTMIDHIGH123456ONVOCALL HALLS HALLD

31、IGITALEFFECT78EFFECTEFFECT OUT010978Effect select switchDIGITAL EFFECT ON switch DIGITAL EFFECT section EFFECT section9 EFFECT OUT control Channel sectionEMX860ST6141516171819 MONITOR section010+6+30510606MASTEREFFECT RTNMONITOR1252505001k2k4k8k12+1260612+1201010111213+6+30510LRMAIN STEREO MASTEREFF

32、ECT RTNAUX INTAPE IN1252505001k2k4k8k60612+1260612+12010010010010141615181917MONILRLIMITERLIMITERL+RBRIDGESTEREOMAINPOWERAMP2021POWERPHANTOM+48VONOFF2223 MAIN section POWER AMP section POWER indicator & PHANTOM switchGraphic equalizerEFFECT RTN controlMASTER controlPeak level indicator10111213Graphi

33、c equalizerEFFECT RTN controlAUX IN controlTAPE INMASTER controlPeak level indicatorLIMITER indicatorStereo/Bridge select switch2021POWER indicatorPHANTOM +48 V switch22237EMX860STRECOUTTAPEINOUTPUTLLLRRRL (MONO)RMAIN(STEREO) MONITORAUX INPOWERED MIXERFOOT SWMICLo-ZHi-ZLINEEFFECTOUTINPUT TO MAINLR(M

34、ONO)MICLINELR(MONO)Lo-ZHi-ZLo-ZHi-ZLo-ZHi-ZLo-ZHi-ZLo-ZHi-Z123456SPEAKERSPOWERRLBABABON/OFFAMONITORL+RBRIDGE123123456Channel input jacks (Hi-Z, Lo-Z) 1-6Channel input jacks (MIC/LINE) 7-8Effect output jack (EFFECT OUT)Foot switch jack (FOOT SW)AUX IN/TAPE IN jacksREC OUT/MONITOR/MAIN (STEREO) jacks

35、Input/output panel123SPEAKERS MONITOR jacksSPEAKERS L/R/L+R BRIDGE jacksPower switch Rear panelDIMENSIONS30816H:32416W:497D:275Unit: mm（単位）CIRCUIT BOARD LAYOUTMIXSUBMIXPowertransformerPOWER 1/3POWER 2/3POWER 3/38EMX860STBLOCK & LEVEL DIAGRAMKEC-92359EMX860ST9DISASSEMBLY PROCEDURE1.MIX Circuit Board1

36、-1Remove the six (6) screws marked 30. The panelassembly can then be removed. (Fig. 1)1-2Remove the sixty-three (63) knobs, the seventeen(17) hexagonal nuts marked A and the seventeen(17) screws marked P120. (Fig. 1)1-3Remove the fourteen (14) screws marked P40. TheMIX circuit board can then be remo

37、ved. (Fig. 1)2.SUB Circuit Board2-1Remove the panel assembly. (See Procedure 1.)2-2Remove the SUB circuit board from the spacer portmarked P110. (Fig. 2)P120A30303030P40P40P40P120 1770P110P11070Fig.1Fig.230:Bonding B-Tyte Screw 4.0X8 MFZN2BL (VR779900)P40:Hexagonal Socket Screw-P 3X25 MFZNBL (V32898

38、00)P120: Bonding Tapping Screw-P 3.0X8 MFZN2BL (VN413300)70: Bind Head Screw SP 5.0X10 MFZN2BL (VU688100)EMX860ST103.PWR 1/3, 2/3, 3/3 Circuit Boards3-1Remove the panel assembly. (See Procedure 1.)3-2Remove the two (2) connectors from the powertransformer and the six (6) screws marked 50.The rear as

39、sembly can then be removed. (Fig. 3)3-3Remove the six (6) screws marked R150. Theradiating plate with the PWR 1/3 circuit board canthen be removed. (Fig. 3)Remove the fourteen (14) screws marked R80, thesix (6) screws marked R40 and the TR holdermarked R60. The PWR 1/3 circuit board can thenbe remov

40、ed. (Fig. 4)3-4Remove the seven (7) hexagonal nuts marked Band the screw marked R210A.The PWR 2/3 circuit board can then be removed.3-5Remove two (2) screws marked R210B. The PWR3/3 circuit board can then be removed. (Fig. 3)4.Motor fan4-1Remove the panel assembly. (See Procedure 1-1.)4-2Remove the

41、rear assembly. (See Procedure 3-2.)4-3Remove the PWS 1/3 circuit board. (See Procedure3-3.)4-4Remove the two (2) screws marked R100. Themotor fan can then be removed.5.Power transformer5-1Remove the panel assembly. (See Procedure 1-1.)5-2Remove the rear assembly. (See Procedure 3-2.)5-3Remove the fo

42、ur (4) screws marked 70. The powertransformer can then be removed. (Fig. 2)R80R40R40R80R80R40R60R8050R210BR210A5050R15050R150R100R100 7BFig.3Fig.450:Bonding B-Tyte Screw 4.0X8 MFZN2BL (VR779900)R100:Bind Head Screw 3.0X30 ZMC2BL (VT520200)R150:Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)R210:B

43、onding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)R40: Bind Head Screw SP 3.0X8 MFZN2Y (EG330290)R80: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600)IC BLOCK DIAGRAM1MD4I/O33AVDD-DC A+5Vs bus2MD3I/O34VDD-DC D+5V3MD0I/OExternal RAM interface data35TST0-DC D+5V4MD1I/O36TST1-DC D+5V5MD2I/O37DOEN-DC D+

44、5V6MCKOOMaster clock output38SDO1ON.C.7XOOCrystal oscillator connection39SDO0ON.C.8XIICrystal oscillator connection40WCON.C.9ER0I41BCOON.C10ER1IEary refrection preset select42MA0O11ER2I43MA1O12REV0I44MA2O13REV1IEffect select45MA3O14REV2I46MA4O15MUTENIDC D+5V47MA5OExternal RAM interface address16ICNI

45、Initial clear48MA6O17PRGIDC D+5V49MA7O18MODEIPreset mode (H=DC +5V)50MA12O19VSS-Ground51MA14O20AVSS-Ground52VSS-Ground21CVA-N.C.53MA10O22AORLON.C.54MA011O23AORRON.C.55MA09OExternal RAM interface address24CHLISample hold capacitor connection56MA8O25AILILch ADC input57MA13O26VDD-DC D+5V58VDD-DC D+5V27

46、AIRIRch ADC input59WENIWrite enable28CHRISample hold capacitor connection60OENIOutput enable29AOFLOLch DAC output61CENIChip select30AOFRORch DAC output62MD7I/O31AVDD-DC A+5V63MD6I/OExternal RAM interface data32CVBIRch midpoint voltage64MD5I/O11EMX860STLSI PIN DISCRIPTIONNJM2068L-D (XM356A00)NJM4558L

47、 (XM922A00)Dual Operational AmplifierBA6137 (XA534A00)LED DriverM5229P (XG203A00)7 SEGMENTS GRAPHIC EQUALIZERTC74HC14AP (IR001400)Hex InverterTC74HC74AP (IR007400)Dual D-Type Flip-FlopD1+ConstantCurrentCircuit1D22D33D44GND5D56AmpOutput7IN8VCC91234567891011121314151617181920IN1IN2IN3IN4IN5NF1NF2NF3NF

48、4NF5-VccGND+VccOUTPUTINVERTEDINPUTNON-INVERTEDINPUTNF7NF6IN7IN6- +- +- +- +- +- +- +- +47k56047k56047k56047k56047k47k47k47k56010k10k11A2345671Y2A2Y3A3YGND891011121314VDD6A6Y5A5Y4A4YPRCLRINPUTSOUTPUTSCKDQQLHHLHLLHLLHHHHtHHLHHtLHLHHLQQDCKPRQQDCKPRQQCLRCLROO2PR11CLR2345671D1CK1PR1Q1QGND891011121314VCC2

49、CLR2D2CK2Q2QPINNAMEI/OFUNCTIONNO.PINNAMEI/OFUNCTIONNO. YSS234 (XN299A00) Digital Sound Processor12EMX860STCIRCUIT BOARDS MIX Circuit BoardComponent side LED installationCN803: to SUB-CN101LEDLED SpacerCircuit BoardNote : See parts list for details of circuit board component parts.CN101:to MIX-CN803C

50、N301:to PWR-CN101CN202:to MIX-CN802CN201:to MIX-CN801 SUB Circuit BoardComponent side3NA-V29525013EMX860STCN104 : to PWR 1/3 -W101RE-1-W101BL-2-W101BE-3-W101WH-4-W101OR-5-W101BR-614EMX860ST PWR 1/3 Circuit BoardComponent sideKEC-72360Component sideComponent side PWR 2/3 Circuit Board PWR 3/3 Circuit