Yamaha-EMX660-mix-sm 维修电路原理图.pdf

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1、1EMX660SERVICE MANUALPA01151920000608-74800 1.45K-479 Printed in Japan 2000.06HAMAMATSU, JAPAN CONTENTSSPECIFICATIONS. 3/5DIMENSIONS. 6PANEL LAYOUT. 7BLOCK & LEVEL DIAGRAM. 10CIRCUIT BOARD LAYOUT. 11DISASSEMBLY PROCEDURE. 12LSI PIN DESCRIPTION. 15IC BLOCK DIAGRAM. 17INSPECTIONS. 18/23TROUBLE SHOOTIN

2、G. 28PARTS LISTOVERALL CIRCUIT DIAGRAMCIRCUIT BOARDSPOWERED MIXERThis document is printed on chlorine free (ECF) paper with soy ink.RadioFans.CN 收音机爱 好者资料库EMX6602 2IMPOR TANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assum

3、edthat basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and under-stood 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-son

4、al injury, destruction of expensive components and failure of the product to perform 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.IMPORTANT :This presentation

5、or sale of this manual to any individual or firm does not constitute authorization certifi-cation, recognition of any applicable 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 c

6、over. The research engineering, andservice departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitableand changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please con

7、tact 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 bus in the unit (heavy gauge black wires connect tothis bus.)IMPORTANT :Turn the unit OFF during disa

8、ssembly and parts replacement. Recheck all work before you apply powerto the 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 also contain traces of chemical

9、s 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 REASON WHATSO EVER!Avoid prolonged, unprotected contact between sold

10、er and your skin! When soldering, do not inhale solder fumes or exposeeyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handlingfood.WARNINGComponents having special characteristics are marked and must be r

11、eplaced with parts having specification equal to thoseoriginally installed.2RadioFans.CN 收音机爱 好者资料库3EMX660SPECIFICATIONSGeneral specifications 0 dB=0.775 VrmsMaximum output power300 W + 300 W/4ohms 0.5% THD at 1 kHz (POWER AMP OUT 1, 2)215 W + 215 W/8ohms 0.5% THD at 1 kHz (POWER AMP OUT 1, 2)600 W/

12、8ohms 0.5% THD at 1 kHz (BRIDGE)Frequency response20 Hz20 kHz +1 dB, 3 dB 1 W output into 8ohms (POWER AMP OUT)20 Hz20 kHz +1 dB, 3 dB +4 dB output into 10 kohms (MAIN OUT, MONITOR OUT, EFFECT SEND)Total harmonic distortionLess than 0.5% 20 Hz20 kHz, 150 W output into 4ohms (POWER AMP OUT 1, 2)Less

13、than 0.3% 20 Hz20 kHz, +14 dB output into 10 kohms (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 (POWER AMP OUT)88 dB residual output noise (MAIN OUT, MONITOR OUT, EFFECT SEND)79 dB (83 dB S/N)MAIN OUT,

14、 MONITOR OUTMaster level control at nominal level 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 SENDMaster level control at nominal level and all channel level

15、 controls at minimum.69 dB (73 dB S/N)EFFECT SENDMaster level control at nominal level and 1 channel level control at nominal level.Maximum voltage gain(PAD: OFF)88 dB CH IN (Lo-Z) to POWER AMP OUT (CH14)66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT (CH14)72 dB CH IN (Lo-Z) to EFFECT OUT (CH14)48 dB C

16、H IN (Lo-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 TAPE IN to MAIN OUT66 dB MIC IN to MAIN OUT, MONITOR OUT (CH56)26 dB LINE IN to MAIN OUT, MONITOR OUT (CH5)46 dB INST IN to MAIN OUT, MONITOR OUT (CH6)Crosstalk at 1 kHz65 dB adjacent input,

17、65 dB input to outputInput channel equalization15 dB MaximumHIGH12 kHz shelving*MID2.5 kHz peakingLOW80 Hz shelving* Turn over/roll-off 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, 5

18、00, 1 k, 2 k, 4 k, 8 kHz), 12 dB Maximum (MAIN OUT, MONITOR OUT)Internal digital effect8 types (VO.ECHO 1, VO.ECHO 2, VO.REV. 1, VO.REV. 2, HALL 1, HALL 2, ROOM, PLATE)Phantom power+15 V is supplied to electrically balanced inputs for powering condenser microphones via 2.4 kohms current limiting/iso

19、lation resisters.LimiterComp. : THD0.5% (POWER AMP OUT)LIMIT indicatorsTurns on. : THD0.5% (POWER AMP OUT)Protection Circuit (Power Amp.)POWER Switch on/off Mute, DC Detection, Temp (Heatsink Temp90C)Foot switch (FC-5)DIGITAL EFFECT MUTE : on/offPower requirementUSA and Canada120 V AC 60 HzEurope230

20、 V AC 50 HzOther240 V AC 50 HzPower consumption250 WDimensions (WxHxD)497275275 mmWeight17 kgEMX6604Input specificationsOutput specifications All output jacks are unbalanced. 0 dB=0.775 Vrms, 0 dBV=1 Vrms.For European ModelPurchaser/User Information specified in EN55103-1 and EN55103-2.Inrush Curren

21、t: 56AConformed Environment: E1, E2, E3 and E4Input 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 output level when the unit is set at maximum gain. (All level con

22、trols are at maximum position.)2. Balanced (T=Hot, R=Cold, S=Gnd)3. Unbalanced 0 dB=0.775 Vrms, 0 dBV=1 Vrms.Nominal levelMax. before clipingCH INPUT (Lo-Z)(CH14)OFF3 kohms50600ohmsMics62 dB (0.616 mV)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31 type2ON600ohms Lines32 dB (19.5 mV)20 dB (77.5 mV)+10 dB (2.

23、45 V)CH INPUT (Hi-Z)(CH14)OFF10 kohms50600ohms Mics52 dB (1.95 mV)40 dB (7.75 mV)10 dB (245 mV)Phone jack (TRS)2ON600ohms Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)MIC INPUT (CH56)3 kohms50600ohms Mics62 dB (0.616 mV)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31 type2LINE INPUT (CH5) (1, 2)10 kohms6

24、00ohms Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack3INST INPUT (CH6) (1, 2)470 kohms1 kohms42 dB (6.16 mV)30 dB (24.5 mV)0 dB (0.775 V)Phone jack3AUX IN10 kohms600ohms Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack3TAPE IN (1, 2)10 kohms600ohms Lines22 dBV (79.4 mV)10 dBV

25、 (316 mV)+17.8 dBV (7.76 V)RCA phono jack3Output connectorsActual source impedanceNominal impedanceOutput levelConnector typeNominalMax. before clipingPOWER AMP OUT (12) (A, B)0.1ohms4/8ohms Speaker60 W/4ohms(300 W/4ohms)Phone jackBRIDGE OUT0.1ohms8ohms Speaker120 W/8ohms(600 W/8ohms)Phone jackMAIN

26、OUT600ohms10 kohms Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jackMONITOR OUT600ohms10 kohms Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jackEFFECT OUT600ohms10 kohms Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jackREC OUT (1, 2)600ohms10 kohms Lines10 dBV (316 mV)+10 dBV (3.16 V)RCA phono jack5EMX660EMX6606H:

27、275D:275259W:49748745.538045.516(45.5)(45.5)168(67.5)15057.5DIMENSIONSUnits: mm7EMX66012345Equalizer controls (HIGH, MID, LOW)Monitor controls (MONI)Effect control (EFFECT)Level control (LEVEL)Pad switch (PAD) (Channel 1-4 only) Control panelPANEL LAYOUTPADHIGHMIDLOWMONIEFFECTLEVEL1115+1515+1515+150

28、1001001012345Channel sectionDIGITALEFFECTONVO. ECHO 1VO. ECHO 2VO. REV. 1VO. REV. 2HALL. 1HALL. 2ROOMPLATEMONITORMASTEREFFECT RTN+6+30510+1260612+12606121252505001k2k4k8k010TAPE IN010010679108121167Effect select switch and indicatorDIGITAL EFFECT ON switch and indicatorDIGITAL EFFECT sectionMONITOR

29、section89101112Graphic equalizerEFFECT RTN controlTAPE IN controlMASTER controlPeak level indicatorEMX6608131415161718Graphic equalizerEFFECT RTN controlAUX IN controlTAPE INMASTER controlPeak level indicatorMAINMASTERTAPE INAUX INEFFECT RTN+6+30510+1260612+12606121252505001k2k4k8k010010010010131817

30、161514POWER AMP12LIMITERMAINBRIDGEMAINMONITORMAINMAIN2AMPs300W300W1920POWERONOFFPHANTOM2122MAIN sectionPOWER AMP sectionPOWER indicator & PHANTOM section1920LIMITER indicatorPower amp select switch2122POWER indicatorPHANTOM switch9EMX660123456Hi-Z, Lo-Z input jacksMIC, LINE, INST input jacksEffect o

31、utput jack (EFFECT OUT)Foot switch jack (FOOT SW)External input jacks (AUX IN/TAPE IN)External output jacks (REC OUT/MONI-TOR/MAIN) Rear panelInput/Output panelINPUTOUTPUTMONITORMAINAUX INRECOUTTAPEINEFFECT OUTFOOT SW12112212LINEHi-ZINSTMICMICLo-ZHi-ZLo-ZHi-ZLo-ZHi-ZLo-ZSEE REAR PANEL CAUTIONEEEngin

32、e12345612Speaker output jacks (POWER AMP 1 A/B,POWER AMP 2 A/B,BRIDGE)Power switchSPEAKERSPOWERBABAPOWER AMP 1BRIDGEPOWER AMP 2ON /OFF12EMX66010BLOCK & LEVEL DIAGRAM2134IC703IC703IC601IC603IC6031443123122431235323IC902IC70635757117IC6018IC50112124312431331232432175IC501IC301(CH3,4)IC101(CH1,2)751IC9

33、0131IC901767IC70457IC7052431IC8012431CN901CN301IC70431IC70531IC701CN301IC70631CN9011243KEC-92542CN101CN101IC20157CN101CN101IC10157MIXSUBPWR11EMX660CIRCUIT BOARD LAYOUTtransformerPowerPWR 1/3PWR 1/3PWR 2/3MIXMIXSUBEMX66012DISASSEMBLY PROCEDUREFig.1PowerPowertransformertransformerPowertransformer50P13

34、0P130P130P40P130P110P110P110P4030P90P90Hexagonal nutP90307070R180R180MIXSUB2SUB circuit board2-1Remove the panel assembly. (See Procedure 1.)2-2Remove the shield case. (See Procedure 1.)2-3Remove the SUB circuit board from the seven(7)spacer supports marked P110. (Fig. 1)1MIX circuit board1-1Remove

35、the six (6) screws marked 30. The panelassembly can then be removed. (Fig. 1)1-2Remove the four (4) screws marked P130. Theshield case can then be removed. (Fig. 1)1-3Remove the forty-three (43) knobs, the thirteen (13)special hexagonal nuts and the thirteen (13) screwsmarked P90. (Fig. 1)1-4Remove

36、the twelve (12) screws marked P40. TheMIX circuit board can then be removed. (Fig. 1) Right side view Front panel Left side view Rear panel30:Bind Head Screw 4.0X8 MFZN2BL (EG340360)50:Bind Head Screw SP 5.0X10 MFZN2BL (VU688100)70:Bind Head Screw 4.0X8 MFZN2BL (EG340360)P40:Hexagonal Button Screw-P

37、 3X25 MFZNBL (V3289800)P90:Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)P130: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)R180: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)13EMX660Fig.23PWR 1/3 circuit board3-1Remove the panel assembly. (See Procedure 1.)3-2Remove the two (2) connectors

38、 from the powertransformer and the six (6) screws marked 70. Therear assembly can then be removed. (Fig. 1)3-3Remove the six (6) screws marked R180. Thepower unit can then be removed. (Fig. 1)3-4Remove the sixteen (16) screws marked R90. TRsupport angle A/B can then be removed. (Fig. 2)3-5Remove the

39、 six (6) screws marked R40. The PWRcircuit board 1/3 can then be removed. (Fig. 2)R90R40R90R40R90R90PWR 1/34PWR 2/3 circuit board4-1Remove the panel assembly. (See Procedure 1.)4-2Remove the rear assembly. (See Procedure 3.)4-3Remove the screw marked R210 and the five (5)“special screws b”. The PWR

40、2/3 circuit board canthen be removed. (Fig. 3)5PWR 3/3 circuit board5-1Remove the panel assembly. (See Procedure 1.)5-2Remove the rear assembly. (See Procedure 3.)5-3Remove the two (2) screws marked R150 and thenremove the PWR 3/3 circuit board with the switchbracket. (Fig. 3)5-4Remove the two (2) s

41、crews marked R140 and thescrew marked R150a from the switch bracket. ThePWR 3/3 circuit board can then be removed. (Fig. 3)R40: Bind Head Screw SP 3.0X8 MFZN2Y (EG330290)R90: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) Power unitEMX66014Fig.3R210R120MotorMotor fanfanHexagonal nutR120R150Moto

42、r fanR140R150aR150Power unitPWR 3/3PWR 2/37Power transformer7-1Remove the panel assembly. (See Procedure 1.)7-2Remove the rear assembly. (See Procedure 3.)7-3Remove the four (4) screws marked 50. The powertransformer can then be removed. (Fig. 1)6Motor fan6-1Remove the panel assembly. (See Procedure

43、 1.)6-2Remove the rear assembly. (See Procedure 3.)6-3Remove the power unit. (See Procedure 3.)6-4Remove the two (2) screws marked R120. Themotor fan can then be removed. (Fig. 3) Front panelR120: Bind Head Screw 3.0X30 ZMC2BL (VT520200)R140: Bind Head Screw 3.0X8 MFZN2BL (VB659000)R150a: Bonding Ta

44、pping Screw-B 3.0X8 MFZN2BL (VN413300)R150: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)R210: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)15EMX660LSI PIN DESCRIPTION1ED2I/O51HX/SDAI/O/ZHost Interface Data Output/I2C Bus Data2ED3I/OExternal Memory and I/O Data Bus52/EMPTYO/ZCMEM Update Buffer

45、 and HR Resistor Empty Flag Output3ED4I/O53AXLR2IAudio Data Transmitt Unit 2/3 Left and Right Channel Frame Frequency Signal4ED5I/O54AR1IAudio Data Receive Unit 1 Data Input5ED6I/O55AR2IAudio Data Receive Unit 2 Data Input6ED7I/O56HRBCK/SA0IHost Interface Receive Clock / I2C Bus Address 07VSS-Ground

46、57HR/SA1IHost Interface Data Input/ I2C Bus Address 18VDD-Power Supply58HRS/SA2IHost Interface Receive Data Frame Frequency Signal/ I2C Bus Address 29CLKM0IClock Mode59VSS-Ground60VDD-Power Supply10CLKM1I61HXBCK/SCLIHost Interface Transmitt Clock/ I2C Bus Clock11TMSITAP(Test Access Port) Mode Select

47、62HXS/SA3IHost Interface Transmitt Data Frame Frequency Signal/ I2C Bus Address 312TDIITAP Data Input63/CS/SA4IHost Interface Chip Select/ I2C Bus Address 413TCKITAP Clock64HBCKS/SA5IHRBCK/HXBCK Active Edge Select/ I2C Bus Address 514CLKINIMaster Clock65I2CSELIHost Interface Mode Select15VSS-Ground6

48、6VSS-Ground16VDD-Power Supply67VDD-Power Supply17CLKOOMachine Clock Output68AXBC1IAudio Data Transmitt Unit 1 bit Clock18EA12/ED8I/O69AXBC2IAudio Data Transmitt Unit 2/3 bit Click19EA13/ED9I/OExternal SRAM and ROM Address Bus/ External DRAM and I/O Data Bus70AXLR1IAudio Data Transmitt Unit 1 Left an

49、d Right Channel Frame Frequency Signal20EA14/ED10I/O71DIV8OMachine Clock Output then 8 min.21EA15/ED11I/O72/LAVORuch ALU Overflow Frag Output22VSS-Ground73/LMVORuch MAC Overflow Frag Output23VDD-Power Supply74/DRDYO/ZHost Interface Transmitt Data Ready Frag Output24EA16/ED12I/O75EMU0I/O/ZEmurator In

50、terrupt 025EA17/ED13I/OExternal SRAM and ROM Address Bus/ External DRAM and I/O Data Bus76EMU1I/O/ZEmurator Interrupt 126EA18/ED14I/O77TDOO/ZTAP(Test Access Port) Data Output27EA19/ED15I/O78DIV512OMachine Clock then512 min.28EA4/ED16I/O79ARLR1IAudio Data Receive Unit 1 Left and Right Channel Frame F