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Yamaha EMX860st Service Manual
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Yamaha EMX860st Service Manual

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Download this manual See also: Owner's Manual
PA
011457
19990220-99800
±æ◊ ¡œ"...OKXIA"Ã˝∆ § ¥¯◊ '¥ø‚www.okxia.cn÷π ©

CONTENTS

BLOCK DIAGRAM
LSI PIN DESCRIPTION
INSPECTION
MIDI INPLEMENTATION CHART .......................................... 25
SERVICE MANUAL
................................................ 3/4
.................................... 5
...................................... 12
.............................................................. 15
1.96K-296
................. 7
............................ 8
.............................. 9
.............................. 11
................................. 11
HAMAMATSU, JAPAN
Printed in Japan '99.03

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  • Page 1 SERVICE MANUAL ±æ◊ ¡œ”…OKXIA”Ã˝∆ § ¥¯◊ ‘¥ø‚www.okxia.cnÃ·π © CONTENTS SPECIFICATIONS ..........3/4 PANEL LAYOUT ........5 CIRCUIT BOARD LAYOUT ....7 BLOCK DIAGRAM ......8 DISASSEMBLY PROCEDURE ......9 LSI PIN DESCRIPTION ......11 IC BLOCK DIAGRAM ......... 11 CIRCUIT BOARDS ........
  • Page 2 IMPOR TANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that 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.

  • Page 3: Specifications

    EMX860ST SPECIFICATIONS General specifications Input specifications MAIN STEREO: 135 W+135 W/8Ω @0.5% THD at‹° kHz, 200 W+200 W/4Ω @0.5% THD at 1 kHz Input level Maximum output power MAIN BRIDGE: 400 W/8Ω @0.5% THD at 1 kHz Actual load Nominal...
  • Page 4 EMX860ST...

  • Page 5: Panel Layout

    EMX860ST PANEL LAYOUT Channel section Equalizer controls (HIGH, MID, LOW) Monitor controls (MONI) HIGH Effect control (EFFECT) PAN control (BAL/PAN control for CH7/8) –15 Level control (LEVEL) Pad switch (PAD) (1-6 only) –15 –15 MONI EFFECT LEVEL DIGITAL EFFECT section...
  • Page 6 EMX860ST MONITOR section Graphic equalizer EFFECT RTN control –12 –12 MASTER control • • • • Peak level indicator • • –5 • • –10 EFFECT RTN MASTER MONITOR MAIN section Graphic equalizer EFFECT RTN control –12 –12 AUX IN control •...
  • Page 7 EMX860ST CIRCUIT BOARD LAYOUT Input/output panel LINE LINE EFFECT Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z (MONO) (MONO) POWERED MIXER Lo-Z Lo-Z Lo-Z Lo-Z Lo-Z Lo-Z AUX IN MAIN(STEREO) MONITOR FOOT SW (MONO) TAPE INPUT TO MAIN OUTPUT Power transformer Channel input jacks (Hi-Z, Lo-Z) 1-6...
  • Page 8 EMX860ST BLOCK & LEVEL DIAGRAM KEC-92359...

  • Page 9: Disassembly Procedure

    EMX860ST DISASSEMBLY PROCEDURE MIX Circuit Board Remove the six (6) screws marked [30]. The panel assembly can then be removed. (Fig. 1) Remove the sixty-three (63) knobs, the seventeen (17) hexagonal nuts marked [A] and the seventeen (17) screws marked [P120]. (Fig. 1) Remove the fourteen (14) screws marked [P40].
  • Page 10 EMX860ST PWR 1/3, 2/3, 3/3 Circuit Boards Remove the panel assembly. (See Procedure 1.) Remove the two (2) connectors from the power transformer and the six (6) screws marked [50]. The rear assembly can then be removed. (Fig. 3) Remove the six (6) screws marked [R150]. The radiating plate with the PWR 1/3 circuit board can then be removed.

  • Page 11: Ic Block Diagram

    EMX860ST LSI PIN DISCRIPTION IC BLOCK DIAGRAM YSS234 (XN299A00) Digital Sound Processor NJM2068L-D (XM356A00) BA6137 (XA534A00) NJM4558L (XM922A00) LED Driver NAME FUNCTION NAME FUNCTION Dual Operational Amplifier  AVDD DC A+5Vs bus   DC D+5V   External RAM interface data...

  • Page 12: Circuit Boards

    EMX860ST CIRCUIT BOARDS MIX Circuit Board CN803: to SUB-CN101 LED installation LED Spacer Circuit Board Component side Note : See parts list for details of circuit board component parts.
  • Page 13 EMX860ST SUB Circuit Board CN301: to PWR -CN101 CN101: to MIX -CN803 CN202: to MIX -CN802 CN201: to MIX -CN801 Component side 3NA-V295250...
  • Page 14 EMX860ST PWR 1/3 Circuit Board CN101: to SUB-CN301 CN102: to Transformer Component side PWR 2/3 Circuit Board PWR 3/3 Circuit Board CN105: to AC Cable CN106: to Transformer CN104 : to PWR 1/3 -W101RE-1 Component side -W101BL-2 -W101BE-3 -W101WH-4 Component side...

  • Page 15: Inspection

    EMX860ST INSPECTIONS Measuring Instruments Low Frequency Oscillator: Balance Output, Output Impedance = 150 ohms Oscilloscope: Input Impedance >= 100 kohms Level Meter: Input Impedance >= 100 kohms Note: Use a balance input measuring instrument Mixer Part 2-1 Setting Conditions Setting conditions are as follows unless otherwise specified.
  • Page 16 EMX860ST 2-4 Gain Each output gain should be as shown in the table below. Table 1: INPUT CH 1-CH 6 [Units: dBs] Input Terminal Input Level MAIN OUT (L, R) MONITOR OUT EFFECT OUT REC OUT (L, R) Lo-Z ± 2 +2.5...
  • Page 17 EMX860ST 2-8 Meter LED When the MAIN OUT and MONITOR OUT output levels are as shown in the table below, the corresponding METER LED lights up. Table 6 [Units: dBs] LED Name Lighting Level +10 ± 2 +7 ± 2 +4±...
  • Page 18 EMX860ST Power Amplifier Part 3-1 Setting Conditions Setting conditions are as follows unless otherwise specified. Input Terminal: INPUT CH 8 LINE L POWER AMP switch: STEREO Measuring Output Terminal: (SPEAKERS) L-A, R-A, MONITOR-A Output Load: 4 ohm (more than 200 W)
  • Page 19 EMX860ST 3-9 Protection 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 does not operate and that the speaker relay does not be open.
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  • Page 25: Parts List

    PARTS LIST CONTENTS OVERALL ASSEMBLY ..........2 ELECTRICAL PARTS ..........4 Notes : DESTINATION ABBREVIATIONS : Japanese model A : Australian model U : U.S.A. model E : European model C : Canadian model D : German model X : General export model B : British model M : South African model : Indonesian model...
  • Page 26 EMX860ST OVERALL ASSEMBLY R100 R150 R110 R210 R130 R140 R30b R210 R200 R170 R30a R190 R120 R30c B110 B120 B100 B110 B120 P100 P110 P150 P130 P140 P120 P120...
  • Page 27 EMX860ST PART NO. DESCRIPTION REMARKS PART NO. DESCRIPTION REMARKS REF NO. RANK REF NO. RANK OVERALL ASSEMBLY EMX860ST R30a NX820610 Circuit Board Overall Assembly (V290650) R30a NX820620 Circuit Board Overall Assembly (V290660) R30a NX820630 Circuit Board H,W,B,A Overall Assembly (V290670)
  • Page 28 EMX860ST ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS PART NO. DESCRIPTION REMARKS REF NO. RANK REF NO. RANK ELECTRICAL PARTS EMX860ST -226 VZ353500 Ceramic Capacitor-SL 100P 50V J V 2 9 5 2 4 0 0 Circuit Board (XV182C0) C227 UJ847100 Electrolytic Cap.
  • Page 29 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK -358 VZ354000 Ceramic Capacitor-F 0.01 50V Z C401 UJ867470 Electrolytic Cap. 47.00 50.0V C402 VV488800 Electrolytic Cap. 10.00 50.0V C403 VV488800 Electrolytic Cap. 10.00 50.0V C404 UJ847100 Electrolytic Cap. 10.00 25.0V C405 UJ847100 Electrolytic Cap.
  • Page 30 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK C529 VZ354000 Ceramic Capacitor-F 0.01 50V Z C530 VZ354000 Ceramic Capacitor-F 0.01 50V Z C531 VV061400 Mylar Capacitor 0.01 50V J C532 VV061500 Mylar Capacitor 0.012 50V J C533 VV061800 Mylar Capacitor 0.015 50V J...
  • Page 31 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK C643 VZ353500 Ceramic Capacitor-SL 100P 50V J C644 VZ353200 Ceramic Capacitor-SL 47P 50V J C645 VZ353200 Ceramic Capacitor-SL 47P 50V J C646 UJ847100 Electrolytic Cap. 10.00 25.0V C647 UJ847100 Electrolytic Cap. 10.00 25.0V...
  • Page 32 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK  IC203 XM922A00 NJM4558L  OP AMP  IC203 XQ212A00 NJM4558L-D IC301 XM356A00 NJM2068L-D OP AMP  IC302 XM922A00 NJM4558L  OP AMP  IC302 XQ212A00 NJM4558L-D  IC303 XM922A00 NJM4558L ...
  • Page 33 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK LD801 VV620800 LT311G-41-C13 RE POWER AMP(LIMITER) LD802 VV620800 LT311G-41-C13 RE MONI(LIMITER) LD803 VV621000 LT321-41-C13 GR POWER LD804 VV620800 LT311G-41-C13 RE DIGITAL EFFECT(ON) Q101 I C 2 2 4 0 3 0 Transistor...
  • Page 34 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R165 HF457180 Carbon Resistor 18.0K 1/4 J R166 HF457180 Carbon Resistor 18.0K 1/4 J R167 HF455220 Carbon Resistor 220.0 1/4 J R168 HF455220 Carbon Resistor 220.0 1/4 J R169 HF456180 Carbon Resistor 1.8K 1/4 J...
  • Page 35 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R268 HF455220 Carbon Resistor 220.0 1/4 J R269 HF456180 Carbon Resistor 1.8K 1/4 J R270 HF456180 Carbon Resistor 1.8K 1/4 J R271 HF457100 Carbon Resistor 10.0K 1/4 J R272 HF457100 Carbon Resistor 10.0K 1/4 J...
  • Page 36 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R371 HF457100 Carbon Resistor 10.0K 1/4 J R372 HF457100 Carbon Resistor 10.0K 1/4 J R373 HF454100 Carbon Resistor 10.0 1/4 J R374 HF454100 Carbon Resistor 10.0 1/4 J R375 HF457180 Carbon Resistor 18.0K 1/4 J...
  • Page 37 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R505 VV058400 Flame Proof C. Resistor 390.0 1/4 J R506 VV065300 Metal Film Resistor 6.8K 1/4 F R507 HF456470 Carbon Resistor 4.7K 1/4 J R508 HF454100 Carbon Resistor 10.0 1/4 J R509...
  • Page 38 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R619 HF457100 Carbon Resistor 10.0K 1/4 J R620 HF457100 Carbon Resistor 10.0K 1/4 J R621 HF457180 Carbon Resistor 18.0K 1/4 J R622 HF457180 Carbon Resistor 18.0K 1/4 J R623 HF457130 Carbon Resistor 13.0K 1/4 J...
  • Page 39 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R820 HF457120 Carbon Resistor 12.0K 1/4 J R821 HF457120 Carbon Resistor 12.0K 1/4 J SW101 VZ587700 Push Switch 1ch(PAD) SW102 VZ587700 Push Switch 2ch(PAD) SW201 VZ587700 Push Switch 3ch(PAD) SW202 VZ587700 Push Switch...
  • Page 40 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK NX820640 Circuit Board Assembly SP OUT (XV183B0) NX820650 Circuit Board Assembly J,U,V (XV183B0) NX820660 Circuit Board Assembly H,W,B,A (XV183B0) V 3 2 2 5 0 0 0 Ferrite Core FR25/15/12-D40 VV319600 Fuse Holder...
  • Page 41 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK C415 UJ698330 Electrolytic Cap. 330.00 100.0V C416 UJ896470 Electrolytic Cap. 4.7 100.0V C417 UJ896470 Electrolytic Cap. 4.7 100.0V C418 UJ866470 Electrolytic Cap. 4.70 50.0V C419 UJ847100 Electrolytic Cap. 10.00 25.0V C420 UJ847470 Electrolytic Cap.
  • Page 42 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK D412 VV335500 Zener Diode MTZ J 43 43.0V -414 VV335500 Zener Diode MTZ J 43 43.0V D415 VG438900 Zener Diode MTZ J 8.2B 8.2V D416 VU801600 Diode 1N4004L D417 VU801600 Diode 1N4004L...
  • Page 43 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK  Q308P Pair Transistor B1647/D2560   Q309N V 2 9 5 4 3 0 0 Pair Transistor B1647/D2560   Q310P Pair Transistor B1647/D2560 Q311 VP872600 Transistor 2SA1708 S,T Q312 VP872700...
  • Page 44 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R313 VV313800 Flame Proof C. Resistor 220.0 1/4 J -316 VV313800 Flame Proof C. Resistor 220.0 1/4 J R317 VR412900 Metal Film Resistor 0.10 3W J R318 VR412900 Metal Film Resistor 0.10 3W J...
  • Page 45 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK C133 VV060100 Mylar Capacitor 1500P 50V J C134 VV062800 Mylar Capacitor 0.1 50V J C135 VV062800 Mylar Capacitor 0.1 50V J C136 VZ354300 Ceramic Capacitor-E 0.0022 500 M C137 VZ354300 Ceramic Capacitor-E 0.0022 500 M...
  • Page 46 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK CN101 VV067500 Connector Base Post M2426XX 15P TE CN201 VV067000 Connector Base Post M2426XX 10P TE CN202 VV066500 Connector Base Post M2426XX 5P TE CN301 VV067500 Connector Base Post M2426XX 15P TE...
  • Page 47 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK Q348 VD678500 Digital Transistor DTA114ES Q349 I A 0 9 7 0 3 0 Transistor 2SA970 GR,BL -351 I A 0 9 7 0 3 0 Transistor 2SA970 GR,BL Q352 I C 2 2 4 0 3 0...
  • Page 48 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK R316 HF457470 Carbon Resistor 47.0K 1/4 J R317 HF457820 Carbon Resistor 82.0K 1/4 J R318 HF457820 Carbon Resistor 82.0K 1/4 J R319 HF455220 Carbon Resistor 220.0 1/4 J R320 HF456470 Carbon Resistor 4.7K 1/4 J...
  • Page 49 EMX860ST PART NO. DESCRIPTION REMARKS REF NO. RANK XV026A00 Power Transformer UL CSA XV027A00 Power Transformer H,W,B XV028A00 Power Transformer V 2 9 5 5 5 0 0 3110KL05WB50L34 V 3 2 7 7 0 0 0 AC Cord J VCTF 2X0.75 12A...
  • Page 50 EMX860ST CIRCUIT DIAGRAM1/2 ( MIX ) EMX860ST OPAMP to SUB-CN101 NJM4580L 130K OPAMP OPAMP 130K OPAMP OPAMP NJM4580L OPAMP OPAMP OPAMP NJM4580L OPAMP OPAMP G.EQUALIZER to SUB-CN201 OPAMP NJM4580L to SUB-CN202 OPAMP OPAMP OPAMP LED DRIVER OPAMP G.EQUALIZER OPAMP NJM4580L...
  • Page 51 EMX860ST CIRCUIT DIAGRAM2/2 ( SUB , PWR ) EMX860ST –˚`ˇOKXIA˚˘⁄·ł˚·¿www.okxia.cnÆ„' REGULATOR +5V to MIX-CN803 SRAM256K R384 R385 OPAMP INVERTER OPAMP INVERTER D-F/F INVERTER OPAMP OPAMP OPAMP OPAMP R386 R387 OPAMP OPAMP OPAMP OPAMP INVERTER KEC-92362-2 D-F/F OPAMP to MIX-CN802 R388...

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