Yamaha-EMX66M-mix-sm 维修电路原理图.pdf

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1、SERVICE MANUALHAMAMATSU, JAPAN1,387K-2101 Printed in Japan 2002.03PA011626 CONTENTSSPECIFICATIONS . 3PANEL LAYOUT. 7CIRCUIT BOARD LAYOUT & WIRING. 10DIMENSIONS .11BLOCK & LEVEL DIAGRAM. 12DISASSEMBLY PROCEDURE . 14LSI PIN DESCRIPTION . 20IC BLOCK DIAGRAM. 22CIRCUIT BOARDS . 23INSPECTION . 33OVERALL

2、CIRCUIT DIAGRAMPARTS LISTEMX66MThis document is printed on chlorine free (ECF) paper with soy ink. OPTIONRK-88 RACK MOUNT KITEMX66M 20020325-75000RK88 20020325-2500RadioFans.CN 收音机爱 好者资料库2EMX66MIMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service

3、 personnel. It has been assumed thatbasic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by theusers, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this pro

4、duct may result in per-sonal injury, destruction of expensive components and failure of the product to per form as specified. Forthese reasons, we advise all Yamaha product owners that all service required should be performed by anauthorized Yamaha Retailer or the appointed service representative.IM

5、PORTANT:This presentation or sale of this manual to any individual or firm does not constitute authorization, certifica-tion, recognition of any applicable technical capabilities, or establish a principal-agent relationship of anyform.The data provided is believed to be accurate and applicable to th

6、e unit(s) indicated on the cover. The research engineering, andservice departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefor, inevitable andchanges in specification are subject to change without notice or obligation to retrofit. Should any discrepancy

7、 appear to exist, pleasecontact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Tu

8、rn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power tothe unit.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical / electronic and / or plastic (whereapplicable) components may

9、also contain traces of chemicals found by the California Health and Welfare Agency (and possibly otherentities) 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 REASONWHAT SO EVER!Avoid prolonge

10、d, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes tosolder / flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.IMPORTANT NOTICE FOR THE UNITED KIN

11、GDOMConnecting the Plug and CordWARNING:THIS APPARATUS MUST BE EARTHEDIMPORTANT: The wires in this main lead are coloured in accor-dance with the following code: GREEN-AND-YELLOW: EARTH BLUE: NEUTRAL BROWN: LIVEAs the colours of the wires in the main lead of this apparatus may notcorrespond with the

12、 coloured markings identifying the terminals in yourplug, proceed as follows:The GREEN-and-YELLOW wire must be connected to the terminal in theplug that is marked with the letter E or the safety earth symbol (or colouredGREEN or GREEN-and-YELLOW).The BLUE wire must be connected to the terminal that

13、is marked with theletter N (or coloured BLACK).The BROWN wire must be connected to the terminal that is marked withthe letter L (or coloured RED).This applies only to products distributed by Yamaha Kemble Music (U. K.) Ltd. WARNINGComponents having special characteristics are marked andmust be repla

14、ced with parts having specification equal to thoseoriginally installed.RadioFans.CN 收音机爱 好者资料库3EMX66M SPECIFICATIONSG General specifications0 dB=0.775 VrmsMaximum output power300 W + 300 W/4 0.5% THD at 1 kHz (SPEAKERS OUT A, B)205 W + 205 W/8 0.5% THD at 1 kHz (SPEAKERS OUT A, B)600 W/8 0.5% THD at

15、 1 kHz (BRIDGE)Frequency response20 Hz20 kHz +1 dB, 3 dB 1 W output into 8 (SPEAKERS OUT)20 Hz20 kHz +1 dB, 3 dB +4 dB output into 10 k (MAIN OUT, MONITOR OUT, EFFECT SEND)Total harmonic distortionLess than 0.5% 20 Hz20 kHz, 150 W output into 4 (SPEAKERS OUT A, B)Less than 0.3% 20 Hz20 kHz, +14 dB o

16、utput into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT)Hum & noise(Average, Rs=150)(with 20 Hz20 kHz BPF)124 dB equivalent input noise, 65 dB residual output noise (SPEAKERS OUT)88 dB residual output noise (MAIN OUT, MONITOR OUT)79 dB (83 dB S/N)MAIN OUT, MONITOR OUTMaster level control at nominal level

17、 and all channel level controls at minimum.69 dB (73 dB S/N)MAIN OUT, MONITOR OUTMaster level control at nominal level and 1 channel level control at nominal level.75 dB (79 dB S/N)EFFECT SENDAll channel level controls at minimum.69 dB (73 dB S/N)EFFECT SEND1 channel level control at nominal level.M

18、aximum voltage gain88 dB CH IN (Low-Z) to SPEAKERS OUT (CH14)66 dB CH IN (Low-Z) to MAIN OUT, MONITOR OUT (CH14)72 dB CH IN (Low-Z) to EFFECT OUT (CH14)48 dB CH IN (Low-Z) to REC OUT (CH14)56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT (CH14)26 dB AUX IN to MAIN OUT24 dB 2TR IN to MAIN OUT66 dB MIC IN

19、to MAIN OUT, MONITOR OUT (CH56)26 dB LINE IN to MAIN OUT, MONITOR OUT (CH5)46 dB Super Hi-Z IN to MAIN OUT, MONITOR OUT (CH6)Crosstalk at 1 kHz65 dB adjacent input, 65 dB input to outputInput channel equalization15 dB MaximumHIGH10 kHz shelving*MID2.5 kHz peakingLOW100 Hz shelving*Turn over/roll-off

20、 frequency of shelving: 3 dB below maximum variable level.Meters5 POINTS LED METER (10, 5, 0, +3, +6 dB) (MAIN OUT, MONITOR OUT)Graphic equalizer7 bands (125, 250, 500, 1 k, 2 k, 4 k, 8 kHz), 12 dB Maximum (MAIN OUT, MONITOR OUT)Internal digital effect8 programs (VO.ECHO 1, VO.ECHO 2, VO.REVERB 1, V

21、O.REVERB 2, HALL 1, HALL 2, ROOM, PLATE)Phantom power+15 V is supplied to electrically balanced inputs for powering condenser microphones via 2.4 k current limiting/isolation resisters.LimiterComp. : THD0.5% (SPEAKERS OUT)LIMIT indicatorsTurns on. : THD0.5% (SPEAKERS OUT)Protection Circuit (Power Am

22、p.)POWER Switch on/off Mute, DC Detection, Temp (Heatsink Temp90C)Foot switch (FC5)DIGITAL EFFECT MUTE : on/offOptional accessoriesRK-88, FC5Power requirement/Power consumptionUSA and Canada120 V AC 60 Hz/250 WEurope230 V AC 50 Hz/300 WOther240 V AC 50 Hz/300 WDimensions (WxHxD)482 x 305 x 328 mmWei

23、ght15 kgSupplied accessoriesAC power cord, Owners Manual4EMX66MG Input specificaitonsG Output specificaitonsInput connectorsPADActual load impedanceNominal impedanceInput levelConnector typeSensitivity11. Sensitivity is the lowest level that can produce an output of +4 dB (1.23 V) or the nominal out

24、put level when the unit is set at maximum gain. (All level controls are at maximum position.)2. Balanced 3. Unbalanced0 dB=0.775 Vrms, 0 dBV=1 Vrms.Nominal levelMax. before clipingCH INPUT (Low-Z)(CH14)OFF3 k50600 Mics62 dB (0.616 mV)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31 type2ON600 Lines32 dB (19.5

25、 mV)20 dB (77.5 mV)+10 dB (2.45 V)CH INPUT (Hi-Z)(CH14)OFF10 k50600 Mics52 dB (1.95 mV)40 dB (7.75 mV)10 dB (245 mV)Phone jack (TRS)2ON600 Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)MIC INPUT (CH56)3 k50600 Mics62 dB (0.616 mV)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31 type2LINE INPUT (CH5) (1, 2)

26、10 k600 Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack3Super Hi-Z (CH6) (1, 2)470 k1 k42 dB (6.16 mV)30 dB (24.5 mV)0 dB (0.775 V)Phone jack3AUX IN10 k600 Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack32TR IN (1, 2)10 k600 Lines22 dBV (79.4 mV) 10 dBV (316 mV)+17.8 dBV (7.7

27、6 V)RCA phono jack3All output jacks are unbalanced.0 dB=0.775 Vrms, 0 dBV=1 Vrms.Output connectorsActual source impedanceNominal impedanceOutput levelConnector typeNominalMax. before clipingPOWER AMP OUT (12) (A, B)0.14/8 Speaker60 W/4(300 W/4)Phone jackBRIDGE OUT0.18 Speaker120 W/8(600 W/8)Phone ja

28、ckMAIN OUT60010 k Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jackMONITOR OUT60010 k Lines+4 dB (1.23 V)+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)RCA phono jack5EMX66M6EMX66M7EMX66M PANEL LAYOUTG CONTR

29、OL PANEL1. CONTROL SECTION Channel Control Equalizer (HIGH, MID, LOW) MONITOR control EFFECT control LEVEL control PAD switch (CH1-4) Digital Effect EFFECT select switch ON switch, indicator1PAD 15+151HIGHMIDLOWLEVELMONITOREFFECT 15+15 15+150+150+1501012345DIGITALEFFECTVOCAL ECHO 1VOCAL ECHO 2VOCALR

30、EVERB 1VOCALREVERB 2HALL 1HALL 2ROOMPLATEONEFFECT6712345678EMX66MGraphic EqualizerEFFECT RTN controlAUX IN control 2TR IN control MASTER control Peak Level Indicator MAIN MONITOR PHANTOM switch, indicator YAMAHA SPEAKER PROCESSING Graphic Equalizer EFFECT RTN control 2TR IN control MASTER control Pe

31、ak Level Indicator PHANTOM ON/OFF switch, indicator ON/OFF switch100100EFFECT RTN2TR INGEQMASTER+1260612+12606121252505001k2k4k8k+6+30-5-10100100MAIN AUX IN89101 11213100100100EFFECT RTN2TR INGEQMASTER+1260612+12606121252505001k2k4k8k+6+30-5-10MONITOR1415161718POWER AMPLIMITERMONMAINMAINMAINMAINBRID

32、GEAB1920PHANTOMONOFF21YAMAHASPEAKERPROCESSING22 POWER AMP LIMITER indicator POWER AMP select switch1112131415161718192021229EMX66M POWER switch, indicator POWER ON/OFF switch, indicator2. INPUT/OUTPUT SECTIONG REAR PANELINPUT terminal (Hi-Z, Low-Z)(CH1-4)INPUT terminal (LINE, MIC, Super Hi-Z)(CH5-6)

33、EFFECT OUT terminalFOOT SW terminalINPUT TO MAIN terminal (AUX IN, 2TR IN)OUTPUT terminal (REC OUT, MAIN, MONI-TOR)SPEAKERS terminalAC IN socketON /OFFpower23EEEngineSEE REAR PANEL CAUTIONHi-ZHi-ZHi-ZHi-ZLow-ZLow-ZLow-ZLow-ZLINEMICMICSuper Hi-ZEFFECT OUTFOOT SWAUX ININPUT TO MAINOUT PUT2TRINRECOUTMA

34、INMONITORON /OFF12345612121122BBRIDGEAC IN2 12 1SPEAKERSBA12231234561210EMX66M CIRCUIT BOARD LAYOUT & WIRINGPWR 3/4PWR 4/4PWR 2/4MIX66PWR 1/4DSPCN106CN107CN902CN104CN901CN301CN101CN105Power TransformerAC INLETDC FanPOWERON/OFF1234LocationConnector AssemblyRemarksParts No.1MIX66-PWR1/424185&2426 15P

35、L=700V8426202MIX66-DSP100mm P=1.25MF127103PWR1/4-PWR2/4B&B4P(V827270)4PWR3/4-PWR4/4PSWV8272902P6P3P3P15P15P27P27PMIX66PWR 3/4PWR 4/4DSPPower TransformerPWR 2/4PWR 1/411EMX66M DIMENSIONS305mm481.5mm448.5mm327.6mm62mmG Front ViewG Side ViewG Front View with Rack Mount Adaptor12EMX66M BLOCK & LEVEL DIA

36、GRAMINPUT TO MAINFOOT SWCH INPUTCH 6CH INPUTCH 1-4CH INPUT CH 5Low-ZHi-ZSuper Hi-ZMICMICLINEAUX IN2TR INMIX66DSP1231234123123123412341234123412341234IC101,301IC501IC601IC603IC603IC501IC502IC502IC703IC703IC901IC704IC704IC601IC706IC306IC102,302CN901-27PINCN901-27PINCN301-27PINCN301-27PIN71421720856142

37、1121316153,51,72,6SW101-401SW70223157231575731576767216721AA13EMX66M+PWR 1/4PWR 2/4EFFECT OUTMONITORMAINREC OUTSPEAKERSBRIDGE12A12B123412341234IC901IC705IC805,806IC705IC702IC903IC903SW701SW910IC802IC706IC803,804CN902-15PINCN101-15PINW101RE1W101BE1W101RE2W101BE231213157315791,2,3,4,691,2,3,4,638CA1-8

38、822111PAPAAA14EMX66MDSP160130130240 DISASSEMBLY PROCEDURE1.Front Panel Assembly(Time required: about 3 min)1-1.Remove the seven (7) screws marked 80 and thescrew marked 90. (Fig.1)1-2.Hold volume knobs and pull the panel to the front.(Fig.1)1-3.Remove the screw marked 100. The front panelassembly ca

39、n then be removed. (Fig.1)(Fig. 1)80:Bind Head Screw 4.0X12 MFZN2BL (VB132700)90:Bind Head Screw 4.0X20 MFZN2BL (VB403600)100: Bind Head Screw A4.0X8 MFZN2BL (VP156800)(Fig. 2)2.DSP-ZFX Circuit Board(Time required: about 4 min)2-1.Remove the front panel assembly. (See Procedure 1)2-2.Remove the two

40、(2) screws marked 160 toremove the shield case. (Fig.2)2-3.Remove the four (4) screws marked 130. TheDSP-ZFX circuit board can then be removed. (Fig.2)130: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)160: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)240: Cord Binder TS-0708 KSS (VZ765100)

41、808090100Body AssemblyFront Panel Assembly15EMX66M3.MIX66 Circuit Board(Time required: about 18 min)3-1.Remove the front panel assembly. (See Procedure 1)3-2.Remove the cable from the cord binder marked240. (Fig.2)3-3.Remove the shield case. (See Procedure 2-2)3-4.Pull out the connector assembly fro

42、m CN301 onthe DSP-ZFX circuit board. (Fig.4)3-5.Remove the six (6) screws marked 230 to removethe shield plate. (Fig.3)3-6.Remove the fifteen (15) screws marked 40, thethirteen (13) screws marked 41, and the thirteen(13) hexagonal nuts marked A. (Fig.5)3-7.Remove the eighteen (18) knobs marked 50, e

43、ight(8) knobs marked 60, the nine (9) knobs marked70, and the eight (8) knobs marked 80.The mix66 circuit board can then be removed.(Fig.5)Note: When placing the front panel assembly onthe table, take care not to weight the PWR circuitboard 4/4. (Fig.6)230 Head Tapping Screw-B 3.0X6 MFZN2BL (EP60023

44、0)(Fig. 4)(Fig. 5)230Top ViewBottom ViewDSPPullPullPull7060805040404040406070 90AA4141(Fig. 6)40: Screw 3X25 MFZNBL (V3289800)41: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)50: Knob GREEN/M-GRAY (V6225300)60: Knob L-GRAY/M-GRAY (V6225600)70: Knob BLUE/M-GRAY (V6225400)80: Knob L-GRAY/D-GRAY (V6

45、225700)90: Bind Head Screw 3.0X8 MFZN2BL (VB659000)(Fig. 3)16EMX66M4.PWR Circuit Board 4/4(Time required: about 4 min)4-1.Remove the front panel assembly. (See Procedure 1)4-2.Pinch slightly the stopper of the power switchescutcheon with a plyer, and pull it to the front toremove. (Fig.7-1)4-3.Remov

46、e the two (2) screws marked 90. (Fig.7-2)4-4.Remove the power switch knob marked 110. ThePWR circuit board 4/4 can then be removed.(Fig.7-2)44:Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)60:Bind Head Screw 4.0X12 MFZN2BL (VB132700)130: Bind Head Screw 4.0X30 MFZN2BL (VT229100)140: Bind Head Ta

47、pping Screw-B 3.0X12 MFZN2BL (VQ074600)150: Bonding Head Tapping Screw-B 3.0X8 MFZN2BL (VN413300)(Fig. 7-2)(Fig. 8)90:Bind Head Screw 3.0X8 MFZN2BL (VB659000)110: Power Switch Knob MX12/4 (VU859000)901109011090110606044140150b130150aC44(Fig. 7-1)PullPullPullPushPushPushPushPushPushPWR 4/45.Rear Pane

48、l Assembly(Time required: about 2 min)5-1.Remove the front panel assembly. (See Procedure 1)5-2.Remove the eight (8) screws marked 60 and thetwo (2) screws marked 44. (Fig.8)17EMX66M(Fig. 9)5-3.Hold the cord holder and pull the rear panel to thefront to remove. (Fig.9)Note: When reinstalling, instal

49、l the rear panelassembly and the front panel assembly in that orderto connect the power supply connector easily.(Fig. 10)220Rear Panel Assembly6.PWR Circuit Board 2/4(Time required: about 4 min)6-1.Remove the rear panel assembly. (See Procedure 5)6-2.Remove the screw marked 150a and the five (5)hexa

50、gonal nuts marked C. The PWR circuit board2/4 can then be removed. (Fig.8)7.PWR Circuit Board 3/4(Time required: about 3 min)7-1.Remove the rear panel assembly. (See Procedure 5)7-2.Remove the two (2) screws marked 140 and thescrew marked 150b. (Fig.8)7-3.Remove the screw marked 220. The PWR circuit