Yamaha-EMX-660-Service-Manual电路原理图.pdf

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1、1 EMX660 SERVICE MANUAL PA 011519 20000608-74800 1.45K-479 Printed in Japan 2000.06 HAMAMATSU, JAPAN CONTENTS SPECIFICATIONS. 3/5 DIMENSIONS. 6 PANEL LAYOUT. 7 BLOCK for example, there should be no oscillation. Especially, check that no oscillation occurs even if the EQ HIGH is at maximum. -73-71 -8

2、8 Table 6Unit: dBs Operation Press ON SW. Set LEVEL control to min. position. - - Depress FOOT SW. - - - Check for: (at MONITOR OUT) No output (-53dBs or less) DIN AUDIO -53dBs or less DINdBsDIO Output obtained Output not obtained (-53dBs or less) DIN AUDIO -30dBs or less DIN AUDIO and full output a

3、re repeated every time FOOT SW is depressed. Output not obtained (-53dBs or less) DIN AUDIO 4.2 1dB attenuated from full output +10 3dBs of full output PGM Switch VO. ECHO1 VO. ECHO2 VO.REV.1 VO.REV.2 HALL1 HALL2 ROOM PLATE 21 EMX660 3.Power Amplifier Part 3-1Setting Conditions Setting conditions ar

4、e as follows unless otherwise specified. 3-2Power ON Muting The muting relay should be released 2.5 +/- 1 seconds after the power switch is turned on. 3-3Speaker Terminal DC Voltage When input terminals are grounded, confirm that each output terminal voltage is 0 +/- 100 mV. 3-4Gain Check that +22 2

5、.0dBs output voltage is obtained when a -26dBs signal is input to the input terminal. Perform the same check under the setting conditions of POWER AMP switch at MAIN-MAIN and the output terminals at POWER AMP 1G and POWER AMP 2B. 3-5Frequency Response Apply a -26dBs signal to the input terminal and

6、check that the output voltage when the signal frequency is 20Hz and 20kHz is within +1 and -3dB ranges respectively, using the output voltage at 1kHz as reference. 3-6Harmonic Distortion Apply a 1 kHz sine wave signal to the input; the output level should be 300 W/4 ohms (33.0 dBs/ch); the distortio

7、n ratio should be less than 0.5 %. Apply a sine wave signal of 20 Hz, 1 kHz and 20 kHz separately to the input; the output level should be 150 W/4 ohms (30.0 dBs); the distortion ratio should be less than 0.5 %. Do this inspection within 30 seconds. 3-7Residual Noise Set the MASTER level controls (M

8、ONITOR and MAIN) at minimum; the residual noise at the output terminal should be less than -65 dBs. Note: Use DIN-AUDIO filter. 3-8Stability Apply a 10 kHz -26 dBs rectangular signal to the input and connect a capacitor (10 pF to 0.47 F) parallel to the 4 ohm load resistor, or connect an inductor (1

9、0H to 0.47 H) serial to the 4 ohms load resistor. Confirm that the output signal is as illustrated below. Overshoot:Vp/Vo 1.8 Ringing:5 waves and less than 5 waves Vp Vo Next, only connect a capacitor (10 pF to 0.47F) to the SPEAKERS terminal as a load, and confirm that the output is as follows: Ove

10、rshoot:Vp/Vo 2.5 Ringing:It should end within 7 waves; there is no oscillation. INPUT CH5 LINE1 MAIN-MONITOR POWER AMP 1A, POWER AMP 2A 4 ohm (more than 300W) Connect the load resistor of SPEAKER OUT only when inspecting the power amplifier section unless otherwise specified. Minimum Input terminal:

11、 POWER AMP switch: Output terminal: Output Load: INPUT CH1 - 4, CH6 LEVEL control: = = EMX660 22 3-9Protection Apply a 10 Hz sine wave signal to the input; increase the input signal so that the output signal is clipped. Confirm that the protection function operates and that the speaker relay does no

12、t open. When a 1 Hz, 6 Vp-p (8.7 dBs) sine wave signal is applied to the input, confirm that the protection function operates within 2 seconds and the speaker relay is turned off. When the input signal is turned off, confirm that the protection function stops and the speaker relay automatically turn

13、s on within 5 seconds. 3-10 PC Limiter and Limiter Apply a 1 kHz -20 dBs sine wave signal to the input and then connect a 1 ohm ( +/- 5% 100 W) resistor; confirm that the output signal is Vp-p 25V and that the signal is not rectangular. 3-11 LIMITER Indicator When a 1 kHz -10.8 dBs sine wave signal

14、is applied to the input, the LIMITER indicator should light up. 3-12 Efficiency When the output of POEWR AMP1 and 2 is adjuster to 12.2V (24.0 dBs), confirm that the primary power is 180 +/- 50W. 4.Main Bridge 4-1Setting Conditions Input Terminal:INPUT CH 5 LINE 1 POWER AMP switch:MAIN BRIDGE Measur

15、ing Output Terminal:BRIDGE Output Load:8 ohm (more than 600 W) INPUT CH 1- 4, CH 6 LEVEL level control:Minimum Note: Other control settings are the same as those for the mixer in section 2-3. 4-2Connection TipMeasuring instruments input 4 ohms Phone PlugMeasuring instruments ground 4 ohms Sleeve 4-3

16、Gain Apply a 1 kHz -26.0 dBs sine wave signal to the input; confirm that the output levels is are +22.0 2 dBs. 4-4Frequency Response Apply a -26dBs signal to the input terminal and check that the output voltage when the signal frequency is 20Hz and 20kHz is within +1 and -6dB ranges respectively, us

17、ing the output voltage at 1kHz as reference. 5.Power Supply Fluctuation There should be no operational problems when the power voltage is varied within +/- 10% of the nominal voltage. = 23 EMX660 EMX660 24 25 EMX660 EMX660 26 27 EMX660 EMX660 28 TROUBLE SHOOTING ProblemCauseAction Sound is no longer

18、 out- put from the speakers. The POWER indicator is dark. The load on this device was too great, and the protection circuit for the inter- nal transformer has operated. Possi- ble reasons for the excessive load are an excessive input to the device, or inap- propriate ventilation. Please wait. When t

19、he device cools off, normal operation will resume automatically. However, please check the following two points to prevent the problem from recurring. If the input to this device is greater than the nominal level, lower the input to the nominal level. If the device is not ventilated suffi ciently, r

20、efer to the cau- tions given at the beginning of this manual and take appropriate measures to insure adequate ventila- tion. The POWER indicator is lit. The load on the amplifi er of this device was too great, and the protection cir- cuit for the amplifier has operated. Possible reasons for the exce

21、ssive load are an excessive level setting in the channel control section or main section, insuffi cient ventilation, or insuffi cient load impedance of the connected speak- ers. Please wait. When the device cools off, normal operation will resume automatically. However, please check the following th

22、ree points to prevent the problem from recurring. If the level setting is excessive, lower it to the nomi- nal level. You can refer to the peak level indicators of the main section when doing so. If the device is not ventilated suffi ciently, refer to the cautions given at the beginning of this manu

23、al and take appropriate measures to insure adequate ven- tilation. If the load impedance (including a short) is too low, and change the connections so that the impedance is correct. Other Connections between devices have come loose. Inspect the connections, and correct any faulty con- nections. Othe

24、r The device may have malfunctioned. WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. Notes : DESTINATION ABBREVIATIONS The numbers “QTY” show quantities for each unit. The parts with “-” in “PART N

25、O.” are not available as spare parts. This mark “ ” in the REMARKS column means these parts are interchangeable. The second letter of the shaded () part number is O, not zero. The second letter of the shaded () part number is I, not one. M:South African model O:Chinese model Q:South-east Asia model

26、T :Taiwan model U :U.S.A. model V :General export model (110V) W:General export model (220) N,X : General export model Y :Export model A :Australian model B :British model C :Canadian model D :German model E :European model F :French model H :North European model I :Indonesian model J :Japanese mode

27、l PARTS LIST CONTENTS OVERALL ASSEMBLY. 2 ELECTRICAL PARTS. 5 POWERED MIXER EMX660 2 OVERALL ASSEMBLY 60 110 70 100 90 10 20 30 40 50 R90 R20 R80 R60 R140 R190 R90 R70 R50 R130 R150 R200 B10 B80 B40 B60 B50 B120 B100 B90 B110 B30 B70 B20 R150 R220 R230 R160 R170 R210 R110 R120 R100 R180 R10 R230 R22

28、0 R30 1/3 3/3 R90 R30 2/3 R30 R40 P100 P140 P110 P120 P20 P10 P180 P30 P40 P50 P60 P70 P70 P90 P60 P80 P80 P90 P130 EMX660 3 : New Parts REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK RANK: Japan only * * * * * * * * * * * * * * OVERALL ASSEMBLYEMX660(V521540) Overall AssemblyJ(V521700) Overall AssemblyU,

29、V(V521720) Overall AssemblyH,W(V521740) Overall AssemblyB(V521760) Overall AssemblyA(V521780) 10Body Assembly 20Panel Assembly(V528870) 30Bind Head Screw4.0X8 MFZN2BL601 40Power TransformerJ 40Power TransformeU,V 40Power TransformeH,W,B 40Power TransformeA 50Bind Head ScrewSP 5.0X10 MFZN2BL401 60Rea

30、r AssemblyJ(V528880) 60Rear AssemblyU,V(V528960) 60Rear AssemblyH,W(V528970) 60Rear AssemblyB(V528980) 60Rear AssemblyA(V528990) 70Bind Head Screw4.0X8 MFZN2BL601 90Cord Binder TS-0708 KSS02 100Cord, Front1430 #24 14P 500L(V522900) 110LabelUV03 Body Assembly B10Body(V520960) B20CarpetC968(VZ52800) B

31、30Shield Sheet(VV43470)2 B40Side Plate (L)06 B50Side Plate (R)(V520970) B60Bind Head Screw4.0X18 MFZN2BL1001 B70Glip Assembly04 B80Oval Head Screw5.0X35 MFZN2BL201 B90Corner Protector803 B100Truss Head Tapping Screw-14.0X12 MFZN2BL16 B110Leg801 B120Truss Head Tapping Screw-14.0X20 MFZN2BL801 Panel A

32、ssembly(V528870) P10Front Panel P20Circuit BoardMIX P30PCB SupportNEW NIFCO1201 P40Hexagonal Button Screw-P3X25 MFZNBL1201 P50KnobMX-GREEN/D-GRAYCH1-6(HIGH,MID,LOW)1801 P60KnobN-GRAY/D-GRAYCH1-6(MONI),1001 MONI.(TAPE IN,MASTER), MAIN(AUX IN,TAPE IN) P70KnobMX-BLUE/D-GRAYCH1-6(EFFECT),801 MONI.(EFFEC

33、T RTN), MAIN(EFFECT RTN) P80KnobORANGE/D-GRAYCH1-6(LEVEL),701 MAIN(MASTER) P90Bonding Tapping Screw-B3.0X8 MFZN2BL1301 P100Circuit BoardSUB P110Spacer SupportKCA-14 PIN GOO701 P120Shield Case(V520990) P130Bonding Tapping Screw-B3.0X8 MFZN2BL401 P140DSP Select ButtonDIGITAL EFFECT P180Cable, FFCBNCDP

34、=1.25K-35-90(V430430) Rear AssemblyJ(V528880) Rear AssemblyU,V(V528960) Rear AssemblyH,W(V528970) Rear AssemblyB(V528980) Rear AssemblyA(V528990) R10Rear PanelJ R10Rear PanelU,V R10Rear PanelH,W,B R10Rear PanelA R20Heat Sink(V521290) - - - - - V5288600 - EG340360 XY325B00 XY326A00 XY327B00 XY328A00

35、VU688100 - - - - - EG340360 VZ765100 - VA039300 V5288600 - - - VV102700 - EG340330 VV085400 VV435200 VV085500 03747270 VV085600 03747290 - V5209800 V5110900 V3291600 V3289800 VU860200 VU859700 VU860300 VV625800 VN413300 V5111000 V3224800 - VN413300 V5210000 - - - - - - V5210400 V5210700 V5211700 V52

36、12300 - EMX660 4 : New Parts REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK RANK: Japan only * * * * R30Circuit BoardPWRJ R30Circuit BoardPWRU,V R30Circuit BoardPWRH,W,B,A R40Bind Head ScrewSP 3.0X8 MFZN2Y601 R50SupportH=7.4 B=5.5601 R60Angle A(V521320) R70Angle B(V521330) R80Insulation Sheet2 R90Bind Hea

37、d Tapping Screw-B3.0X12 MFZN2BL1601 R100Fan3110KL05WB50L3408 R110Angle Bracket, Fan03 R120Bind Head Screw4.0X30 ZMC2BL201 R130Switch Bracket(V319280) R140Bind Head Screw3.0X8 MFZN2BL201 R150Bonding Tapping Screw-B3.0X8 MFZN2BL301 R160AC CordJ VCTF 2X0.75 7AJ05 R160AC CordUC SJT 3X#18 10AU,V06 R160AC

38、 CordE H05VV-F3X0.7510AH,W,A06 R160AC CordBS H05VV-F3X0.75B08 R170Cord Strain ReliefSR-6P101 R180Bind Head Tapping Screw-B4.0X8 MFZN2BL601 R190Power Switch KnobMX12/4POWER ON/OFF01 R200Bind Head ScrewA4.0X8 MFZN2BLU,V,H,W,B,A01 R210Bonding Tapping Screw-B3.0X8 MFZN2BL01 R220Holder, Cord2 R230Bind He

39、ad Tapping Screw-B4.0X8 MFZN2BL201 V5227100 V5227200 V5227300 EG330290 VV086500 - - V5214900 VQ074600 V2955500 V2951400 VT229100 - VB659000 VN413300 V3277000 VV205600 V3277100 VV058300 VV103100 EG340190 VU859000 VP156800 VN413300 V4773400 EG340190 EMX660 5 : New Parts REF NO.PART NO.DESCRIPTIONREMAR

40、KSQTYRANK RANK: Japan only * * * * * * * * * ELECTRICAL PARTS ELECTRICAL PARTSEMX660 Circuit BoardMIX(XY280A00) Circuit BoardSUB(XY281A00) Circuit BoardPWRJ(XY324A00) Circuit BoardPWRU,V(XY324A00) Circuit BoardPWRH,W,B,A(XY324A00) Circuit BoardMIX(XY280A00) LED SpacerMX12/42201 ButtonNO.947 CD-GRAYP

41、AD401 Jumper Wire0.620001 C101Electrolytic Cap. 47.00 63.0V C102Electrolytic Cap.-LLM10.00 50.0V01 C103Electrolytic Cap.-LLM10.00 50.0V01 C104Ceramic Cap.-B 470P 50V K01 -106Ceramic Cap.-B 470P 50V K01 C107Ceramic Cap.-B 470P 50V K01 C108Electrolytic Cap.470.00 10.0V01 C109Ceramic Capacitor-SL 100P

42、50V J01 C111Ceramic Capacitor-SL 100P 50V J01 -112Electrolytic Cap. 10.00 63.0V01 C113Mylar Capacitor0.027 50V J01 C114Mylar Capacitor 5600P 50V J01 C115Mylar Capacitor 8200P 50V J C116Mylar Capacitor 2200P 50V J01 C117Ceramic Capacitor-SL 100P 50V J01 C118Ceramic Capacitor-SL 27P 50V J01 C119Electr

43、olytic Cap. 47.00 35.0V01 C120Electrolytic Cap. 10.00 63.0V01 C121Electrolytic Cap. 10.00 63.0V01 C122Ceramic Capacitor-F0.01 50V Z01 -125Ceramic Capacitor-F0.01 50V Z01 C126Ceramic Cap.-B 1000P 50V K01 C201Electrolytic Cap. 47.00 63.0V C202Electrolytic Cap.-LLM10.00 50.0V01 C203Electrolytic Cap.-LL

44、M10.00 50.0V01 C204Ceramic Cap.-B 470P 50V K01 -207Ceramic Cap.-B 470P 50V K01 C208Electrolytic Cap.470.00 10.0V01 C209Ceramic Capacitor-SL 100P 50V J01 -211Ceramic Capacitor-SL 100P 50V J01 C212Electrolytic Cap. 10.00 63.0V01 C213Mylar Capacitor0.027 50V J01 C214Mylar Capacitor 5600P 50V J01 C215My

45、lar Capacitor 8200P 50V J C216Mylar Capacitor 2200P 50V J01 C217Ceramic Capacitor-SL 100P 50V J01 C218Ceramic Capacitor-SL 27P 50V J01 C219Electrolytic Cap. 47.00 35.0V01 C220Electrolytic Cap. 10.00 63.0V01 C221Electrolytic Cap. 10.00 63.0V01 C301Electrolytic Cap. 47.00 63.0V C302Electrolytic Cap.-L

46、LM10.00 50.0V01 C303Electrolytic Cap.-LLM10.00 50.0V01 C304Ceramic Cap.-B 470P 50V K01 C305Ceramic Cap.-B 470P 50V K01 -307Ceramic Cap.-B 470P 50V K01 C308Electrolytic Cap.470.00 10.0V01 C309Ceramic Capacitor-SL 100P 50V J01 -311Ceramic Capacitor-SL 100P 50V J01 C312Electrolytic Cap. 10.00 63.0V01 C

47、313Mylar Capacitor0.027 50V J01 C314Mylar Capacitor 5600P 50V J01 C315Mylar Capacitor 8200P 50V J C316Mylar Capacitor 2200P 50V J01 C317Ceramic Capacitor-SL 100P 50V J01 C318Ceramic Capacitor-SL 27P 50V J01 C319Electrolytic Cap. 47.00 35.0V01 C320Electrolytic Cap. 10.00 63.0V01 C321Electrolytic Cap.

48、 10.00 63.0V01 V5110900 V5111000 V5227100 V5227200 V5227300 V5110900 VV307300 VZ968500 VV291400 UR877470 VV488800 VV488800 VZ353800 VZ353800 VZ353800 UR828470 VZ353500 VZ353500 UR877100 UA954270 UA953560 UA953820 UA953220 VZ353500 VZ352900 UR857470 UR877100 UR877100 VZ354000 VZ354000 VZ353900 UR877470 VV488800 VV488800 VZ353800 VZ353800 UR828470 VZ353500 VZ353500 UR877100 UA954270 UA953560 UA953820 UA953220 VZ353500 VZ352900 UR857470 UR877100 UR877100 UR877470 VV488800 VV488800 VZ353800 VZ353800 VZ353800 UR828470 VZ353500 VZ353500 UR877100 UA954270 UA953560 UA9