Yamaha-EMX62M-mix-sm 维修电路原理图.pdf

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1、SERVICE MANUALHAMAMATSU, JAPAN1,387K-939 Printed in Japan 2002.03PA011627 CONTENTSSPECIFICATIONS . 3PANEL LAYOUT. 7CIRCUIT BOARD LAYOUT & WIRING. 10DIMENSIONS .11BLOCK & LEVEL DIAGRAM. 12DISASSEMBLY PROCEDURE . 14LSI PIN DESCRIPTION . 19IC BLOCK DIAGRAM. 20CIRCUIT BOARDS . 21INSPECTION . 29OVERALL C

2、IRCUIT DIAGRAMPARTS LISTEMX62MThis document is printed on chlorine free (ECF) paper with soy ink. OPTIONRK-88 RACK MOUNT KITRadioFans.CN 收音机爱 好者资料库2EMX62MIMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed thatbasi

3、c 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 product may result in per-sonal injury, des

4、truction 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.IMPORTANT:This presentation or sale of thi

5、s 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 the unit(s) indicated on the cover. The re

6、search 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 appear to exist, pleasecontact the dist

7、ributors 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:Turn the unit OFF during disassembly and p

8、arts 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 also contain traces of chemicals found b

9、y 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 prolonged, unprotected contact between solder an

10、d 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 KINGDOMConnecting the Plug and CordWARNING:

11、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 coloured markings identifying the termi

12、nals 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 is marked with theletter N (or coloured

13、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 replaced with parts having specification equa

14、l to thoseoriginally installed.RadioFans.CN 收音机爱 好者资料库3EMX62M SPECIFICATIONSG General specificationsMaximum output power135 W/8 0.5% THD at 1 kHz (SPEAKERS OUT)200 W/4 0.5% THD at 1 kHz (SPEAKERS OUT)175 mW/40 0.5% THD at 1 kHz (PHONES OUT)Frequency response20 Hz20 kHz +1 dB, 3 dB 1 W output into 8

15、(SPEAKERS OUT)20 Hz20 kHz +1 dB, 3 dB +4 dB output into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT)Total harmonic distortionLess than 0.5% 20 Hz20 kHz, 100 W output into 4 (SPEAKERS OUT)Less than 0.3% 20 Hz20 kHz, +14 dB output into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT)Hum & noise(Average, Rs=150)(w

16、ith 20 Hz20 kHz BPF)124 dB equivalent input noise, 68 dB residual output noise (SPEAKERS OUT)88 dB residual output noise (MAIN OUT, MONITOR OUT)79dB (83 dB S/N)(MAIN OUT, MONITOR OUT)Master level control: nominal levelChannel level controls: minimum69 dB (73 dB S/N)(MAIN OUT, MONITOR OUT)Master leve

17、l control: nominal level1 channel level control: nominal level75 dB (79 dB S/N)(EFFECT OUT)All channel level controls: minimum69 dB (73 dB S/N)(EFFECT OUT)1 channel level control: nominal levelMaximum voltage gain86 dB CH IN (Lo-Z) to SPEAKERS OUT (CH14)66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT (C

18、H14)66 dB CH IN (Lo-Z) to EFFECT OUT (CH14)48 dB CH IN (Lo-Z) to REC OUT (CH14)56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT (CH14)26 dB LINE IN to MAIN OUT (CH5)26 dB AUX IN to MAIN OUT22 dB 2TR IN to MAIN OUT46 dB Super Hi-z IN to MAIN OUT (CH6)Crosstalk at 1 kHz65 dB adjacent input, 65 dB input to

19、outputInput channel equalization15 dB MaximumHIGH10 kHz shelving *LOW100 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 OUTGraphic equalizer7 bands (125, 250, 500, 1k, 2k, 4k, 8k Hz) MAIN OUT12 dB Maximum

20、Internal digital effect3 programs (VOCAL REVERB, LARGE HALL, SMALL HALL)Phantom power+15 V (balanced input)LimiterComp. : THD0.5% (SPEAKERS OUT)LIMIT indicatorTurn on. : THD0.5% (SPEAKERS OUT)Protection circuit(Power amp)POWER switch on/off muteDC detectionTemp (Heatsink Temp90C)Foot switch (FC5)DIG

21、ITAL EFFECT MUTE : on/offOptional accessoriesRK-88, FC5Power requirementUSA and Canada: 120 V AC 60 HzEurope:230 V AC 50 HzOther:240 V AC 50 HzPower consumption110 WDimensions (WxHxD)482 x 305 x 328 mmWeight12 kgSupplied accessoriesAC power cord, Owners Manual4EMX62MG Input specificaitonsG Output sp

22、ecificaitonsInput connectorsPADActual load impedanceNominal impedanceInput levelConnector typeSensitivity*1*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. (All level controls are at maximum position.)N

23、ominal levelMax. before clipingCH INPUT (Lo-Z)(CH14)OFF3 k50600 Mics62 dB (0.616 mV)50 dB (2.45 mV)20 dB (77.5 mV)XLR-3-31 type*2*2. Balanced.ON600 Lines32 dB (19.5 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)*2ON

24、600 Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)LINE IN (CH5) (12)10 k600 Line22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack*3*3. Unbalanced. 0 dB= 0.775 Vrms, 0 dBV= 1 Vrms.Super Hi-Z IN (CH6) (12)470 k1k42 dB (6.16 mV)30 dB (24.5 mV)0 dB (0.775 V)Phone jack*3AUX IN10 k600 Line22 dB (6

25、1.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack*32TR IN (12)10 k600 Line22 dBV (79.4 mV)10 dBV (316 mV)+17.8 dBV (7.76 V)Phono jack PHONE JACKS are unbalanced. 0 dB= 0.775 Vrms, 0 dBV= 1 Vrms.Output connectorsActual source impedanceNominal impedanceOutput levelConnector typeNominalMax. before cliping

26、SPEAKERS OUT (1, 2)0.14/8 Speaker40 W/4200 W/4Phone jackMAIN 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 jackPHONES OUT3540 Phones33 mW175 mWPhone jackREC OUT (1, 2)600

27、10 k Lines10 dBV (316 mV)+10 dBV (3.16 V)Phono jack5EMX62M6EMX62M7EMX62M PANEL LAYOUTG CONTROL PANEL1. CONTROL SECTION Channel ControlxEqualizer (HIGH, LOW)MONITOR controlEFFECT controlLEVEL controlPAD switch (CH1-4) Digital EffectEFFECT select switchON switch, indicatorx8EMX62M17Graphic EqualizerEF

28、FECT RTN controlAUX IN control2TR IN control MASTER control Peak Level Indicator LIMITER indicator MAIN MONITOR PHANTOM switch, indicator YAMAHA SPEAKER PROCESSING POWER switch, indicator EFFECT RTN control MASTER control PHANTOM ON/OFF switch POWER ON/OFF switch, indicator101 112131415161819 ON/OFF

29、 switch1112131415161718199EMX62M2. INPUT/OUTPUT SECTIONG REAR PANELINPUT terminal (Hi-Z, Low-Z)(CH1-4)INPUT terminal (LINE 1, 2)(CH5)INPUT terminal (Super Hi-Z)(CH6)EFFECT OUT terminalFOOT SW terminalINPUT TO MAIN terminal (AUX IN)INPUT TO MAIN terminal (2TR IN)OUTPUT terminal (REC OUT)OUTPUT termin

30、al (MAIN)OUTPUT terminal (MONITOR)OUTPUT terminal (PHONES) SPEAKERS 1, 2 terminal AC IN socket2112356789101 1412345678910111210EMX62M CIRCUIT BOARD LAYOUT & WIRINGPWR 3/3MIX62 2/2PWR 2/3PWR 1/3CN103CN107CN903CN104CN101Power TransformerAC INLETPOWERON/OFF123LocationConnector AssemblyRemarksParts No.1

31、MIX621/2-PWR1/32426&2426 14P L=700(V842610)2PWR1/3-PWR2/3B&B2P(V828330)3PWR3/3-MIX622/2PSWV82729006P3P3P15P15PMIX62 1/2PWR 3/3PWR 1/3MIX62 2/2MIX62 1/2PWR 2/3Power Transformer11EMX62M DIMENSIONS305mm481.5mm448.5mm327.6mm62mmG Front ViewG Side ViewG Front View with Rack Mount Adaptor12EMX62M BLOCK &

32、LEVEL DIAGRAMINPUT TO MAINFOOT SWCH INPUTCH6CH INPUTCH5CH INPUTCH1-4Low-ZHi-Z1212LINE1AUX IN2TR INSuper Hi-Z2(MUTE)MIX621231234123412341234123412341234IC101,201SW401IC3012,63,51,731IC30231IC30357IC303IC507SW501SW503SW101-102SW201-20231IC40467IC40167IC40121ICIC102,202IC301IC3025IC4036791113151625,27A

33、A13EMX62M+4dbSPEAKERSABMAINMAIN OUTMONITOR OUTPHONESEFFECT OUT+-PWR 1/3PWR 2/31234123412341234SW403IC4017IC4011IC402IC408,40957IC40681,2,3,4,6IC40731IC4037IC40231IC40331OUTPUTREC OUTCN501-14PINCN101-14PINW101RE1W101RE2W101BL1W101BL238CA1-8822112AA14EMX62M808090100Body AssemblyFront Panel Assembly DI

34、SASSEMBLY 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 can then be removed. (Fig.1)(Fig. 1)80:B

35、ind 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.MIX62 Circuit Board 1/2(Time required: about 16 min)2-1.Remove the front panel assembly. (See Procedure 1)2-2.Remove the cable from the cord binder marked170. (

36、Fig.2)170170: Cord Binder TS-0708 KSS (VZ765100)15EMX62M160Top ViewBottom View(Fig. 3)160 Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)2-3.Remove the six (6) screws marked 160 to removethe shield plate. (Fig.3)2-4.Remove the fifteen (15) screws marked 40, thenine (9) screws marked 41, and the f

37、ourteen (14)hexagonal nuts marked A. (Fig.4)2-5.Remove the twelve (12) knobs marked 50, eight(8) knobs marked 60, the eight (8) knobs marked70, and the eight (8) knobs marked 80.The mix62 circuit board 1/2 can then be removed.(Fig.4)Note: When placing the front panel assembly onthe table, take care

38、not to weight the MIX62circuit board 2/2. (Fig.5)706080504040404040607090AA4141(Fig. 4)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 (V6225700)

39、90: Bind Head Screw 3.0X8 MFZN2BL (VB659000)(Fig. 5)16EMX62M44:Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)60:Bind Head Screw 4.0X12 MFZN2BL (VB132700)90:Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600)100: Bonding Head Tapping Screw-B 3.0X8 MFZN2BL (VN413300)(Fig. 6-1)3.MIX62 Circuit Board

40、 2/2(Time required: about 4 min)3-1.Remove the front panel assembly. (See Procedure 1)3-2.Pinch slightly the stopper of the power switchescutcheon with a plyer, and pull it to the front toremove. (Fig.6-1)3-3.Remove the two (2) screws marked 90. (Fig.6-2)3-4.Remove the power switch knob marked 110.

41、TheMIX62 circuit board 2/2 can then be removed.(Fig.6-2)PullPullPullPushPushPushPushPushPushMIX 2/2901109011090110(Fig. 6-2)4.Rear Panel Assembly(Time required: about 5 min)4-1.Remove the front panel assembly. (See Procedure 1)4-2.Remove the six (6) screws marked 60 and the two(2) screws marked 44.

42、(Fig.7)4-3.Hold the cord holder and pull the rear panel to thefront to remove. (Fig.8)Note: When reinstalling, install the rear panelassembly and the front panel assembly in thatorder to connect the power supply connectoreasily.604444C10090 100Pull UpPull UpPull UpRear Panel AssemblyRear Panel Assem

43、blyRear Panel AssemblyBody AssemblyBody AssemblyBody Assembly(Fig. 7)(Fig. 8)90:Bind Head Screw 3.0X8 MFZN2BL (VB659000)110: Power Switch Knob MX12/4 (VU859000)17EMX62M30806030306080705.PWR Circuit Board 2/3(Time required: about 7 min)5-1.Remove the rear panel assembly. (See Procedure 4)5-2.Remove t

44、he screw marked 100 and the two (2)hexagonal nuts marked C. The PWR circuit board2/3 can then be removed. (Fig.7)6.PWR Circuit Board 1/3(Time required: about 9 min)6-1.Remove the rear panel assembly. (See Procedure 4)6-2.Remove the PWR circuit board 2/3. (See Procedure 5)6-3.Remove the six (6) screw

45、s marked 30, the six (6)screws marked 60, the screw marked 70 and thethree (3) screws marked 80.The PWR circuit board 1/3 can then be removed.(Fig.9)(Fig. 9)30: Bind Head Screw SP 3.0X8 MFZN2Y (EG330290)60: Bind Head Tapping Screw-B 3.0X10 MFZN2BL (EP600140)70: Bind Head Tapping Screw-B 3.0X6 MFZN2B

46、L (EP600230)80: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)(Fig. 10)7.PWR Circuit Board 3/3(Time required: about 6 min)7-1.Remove the rear panel assembly. (See Procedure 4)7-2.Remove the two (2) screws marked 90 and thescrew marked 100. (Fig.7)7-3.Remove the screw marked 170. The PWR circuitb

47、oard 3/3 can then be removed. (Fig.10)170: Bind Head Screw A4.0X6 MFZN2BL (EG340290)170Rear Panel AssemblyPWR 3/318EMX62M40404040Body Assembly43Power Transformer50: Bind Head Screw 4.0X16 MFZN2BL (EG340110)40: Bind Head Tapping Screw-P 4.0X30 MFZN2BL (V8322700)(Fig. 12)(Fig. 13)(Fig. 11)8.Power Tran

48、sformer(Time required: about 6 min)8-1.Remove the rear panel assembly. (See Procedure 4)8-2.Remove the four (4) screws marked 43. Thepower transformer can then be removed. (Fig.11)43: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)9.Front Frame (Time required: about 6 min)9-1.Remove the front pan

49、el assembly. (See Procedure 1)9-2.Remove the four (4) screws marked 50 to removethe handle assembly. (Fig.12)9-3.Remove the ten (10) screws marked 40. The frontframe can then be removed. (Fig.13)Body AssemblyHandle5050Body AssemblyHandle5050Body AssemblyHandle505019EMX62M LSI PIN DESCRIPTIONMIX62: I

50、C5071MD4I/O33AVDD-DC A+5Vs bus2MD3I/O34VDD-DC D+5V3MD0I/OExternal RAM interface data35TST0-DC D+5V4MD1I/O36TST1-DC D+5V5MD2I/O37DOEN-DC D+5V6MCKOOMaster clock output38SDO1ON.C.7XOOCrystal oscillator connection39SDO0ON.C.8XIICrystal oscillator connection40WCON.C.9ER0I41BCOON.C10ER1IEary refrection pr