Yamaha EMX 620 Service Manual
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Yamaha EMX 620 Service Manual

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3 7 63 1515 0
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L 13942296513
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PA 011494
http://www.xiaoyu163.com
CONTENTS
SPECIFICATIONS ................................................................................ 3
PANEL LAYOUT .................................................................................. 7
CIRCUIT BOARD LAYOUT ................................................................. 10
DIMENSIONS .................................................................................... 10
BLOCK & LEVEL DIAGRAM .............................................................. 11
DISASSEMBLY PROCEDURE .......................................................... 12
LSI PIN DISCRIPTION ........................................................................ 14
IC BLOCK DIAGRAM ......................................................................... 15
INSPECTION...................................................................................... 16
PARTS LIST
CIRCUIT DIAGRAM
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CIRCUIT BOARDS
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SERVICE MANUAL
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HAMAMATSU, JAPAN
1.51K-166
Printed in Japan 2000.02
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  • Page 1 http://www.xiaoyu163.com 3 7 63 1515 0 SERVICE MANUAL L 13942296513 CONTENTS SPECIFICATIONS ................3 PANEL LAYOUT .................. 7 CIRCUIT BOARD LAYOUT ..............10 DIMENSIONS ..................10 BLOCK & LEVEL DIAGRAM .............. 11 DISASSEMBLY PROCEDURE ............12 LSI PIN DISCRIPTION ................ 14 IC BLOCK DIAGRAM .................

  • Page 2: Http://Www.xiaoyu163.Com

    3 7 63 1515 0 IMPORTANT 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 understood by the users, and have therefore not been restated.

  • Page 3: Te L 13942296513

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 SPECIFICATIONS General Specifications 135 W/8 ohm @0.5 % THD at 1 kHz (SPEAKERS OUT) Maximum output power 200 W/4 ohm @0.5 % THD at 1 kHz (SPEAKERS OUT) 175 mW/40 ohm @0.5 % THD at 1 kHz (PHONES OUT) 20 Hz–20 kHz +1 dB, –3 dB @1 W output into 8 ohm (SPEAKERS OUT) Frequency response 20 Hz–20 kHz +1 dB, –3 dB @+4 dB output into 10 k ohm (MAIN OUT, MONITOR OUT, EFFECT OUT)

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    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 Input Specifications Actual load Nominal Input level Connector Input connectors PAD impedance impedance Sensitivity *1 Nominal level Max. before cliping type CH INPUT (Lo-Z) ON 3 kohm 50–600 ohm Mics –62 dB (0.616 mV) –50 dB (2.45 mV) –20 dB (77.5 mV) XLR-3-31 (CH1–4)

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    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

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    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 7: Panel Layout

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PANEL LAYOUT Control Panel 1. Channel Section HIGH & LOW EQ control L 13942296513 MONI control EFFECT control LEVEL control PAD switch (1-4 only) 2. DIGITAL EFFECT Section VOCAL, L. HALL, S.HALL switches DIGITAL EFFECT ON switch &...
  • Page 8 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 3. MAIN Section Graphic equalizer EFFECT RTN control AUX IN control TAPE IN MASTER control Level meter LIMITER indicator L 13942296513 4. MONI Section EFFECT RTN MASTER control 5. POWER Indicator, PHANTOM Switch & Indicator POWER indicator PHANTOM switch u163...
  • Page 9 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 6. Input/Output Panel Hi-Z, Lo-Z (inputs 1-4) LINE 1 & 2 (input 5) INST 1 & 2 (input 6) EFFECT OUT jack FOOT SW jack AUX IN-INPUT TO MAIN jack TAPE IN-INPUT TO MAIN jacks REC OUT-OUTPUT jacks MAIN-OUTPUT jack L 13942296513...

  • Page 10: Circuit Board Layout

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 CIRCUIT BOARD LAYOUT L 13942296513 DIMENSIONS u163 http://www.xiaoyu163.com...

  • Page 11: Block & Level Diagram

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 BLOCK & LEVEL DIAGRAM L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 12: Disassembly Procedure

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 DISASSEMBLY PROCEDURE Front Panel Assembly Remove the six (6) screws marked [30a]. The Front panel assembly can be removed. (fig, 1) MIX Circuit Board After removing the front cover, remove the follow- ing screws. Each circuit board can then be re- moved.

  • Page 13: Front View

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 Front View (Fig.2) Rear View L 13942296513 (Fig.3) Inside View u163 (Fig.4) http://www.xiaoyu163.com...

  • Page 14: Lsi Pin Discription

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 LSI PIN DISCRIPTION YSS234 (XN299A00) Digital Sound Processor NAME I/O FUNCTION NAME I/O FUNCTION AVDD DC A+5Vs bus DC D+5V External RAM interface data TST0 DC D+5V TST1 DC D+5V DOEN DC D+5V MCKO Master clock output SDO1...

  • Page 15: Ic Block Diagram

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 IC BLOCK DIAGRAM NJM2068L-D(XM356A00) TC74HC14AF-TP1(XD657A00) M5238AP(XM085A00) Hex Inverter Dual Operational Amplifier NJM4558L-D(XM922A00) NJM4580L(XF195A00) Dual Operational Amplifier TC74HC74AP(IR007400) M5229P(XG203A00) BA6137(XA534A00) Dual D-Type Flip-Flop 7 SEGMENTS GRAPHIC EQUALIZER LED Driver L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 16: Inspection

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 INSPECTIONS Measuring Instruments Low frequency Oscillator: Balance Output, Output Impedance = 150 ohms Oscilloscope: Input Impedance >= 100 K ohms Level Meter: Input Impedance >= 100 K ohms Note: Use a balance input measuring instrument Mixer Part 2-1 Setting Conditions Setting conditions are as follows unless otherwise specified.

  • Page 17: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com EMX620 3 7 63 1515 0 2-4 Gain Each output gain should be as shown in the table below. Table1 [Units:dBs] Input Terminal Input Level MAIN OUT MONITOR OUT EFFECT OUT REC OUT PHONES OUT Lo-Z +4 +/- 2 +4 +/- 2 +4 +/- 2 +13.8 +/- 2...
  • Page 18 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 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 4 [Units:dBs] LED Name Lighting Level +10 + / - 2 +7 + / - 2 +4 + / - 2 -1 + / - 2...
  • Page 19 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 Power Amplifier Part 3-1 Setting Conditions Setting conditions are as follows unless otherwise specified. Input Terminal: INPUT CH 5 LINE 1 Measuring Output Terminal: SPEAKERS A Output Load: 4 ohm (more than 200 W) Connect the resistor when inspecting the power amplifier section.
  • Page 20 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 3-9 Protection Apply a 10 Hz sine wave signal to the input; increase the input so that the output signal is clipped.Confirm that the protection does not operate and that the speaker relay does not be open. When applying a 1 Hz, 6 Vp-p (8.7 dBs) sine wave signal to the input, confirm that the protection operates within 2 seconds and that the speaker relay is turned off.
  • Page 21 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
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  • Page 23 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 24 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 25 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
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  • Page 27 http://www.xiaoyu163.com 3 7 63 1515 0 PARTS LIST CONTENTS OVERALL ASSEMBLY ......... 2 ELECTRICAL PARTS ........... 5 L 13942296513 Note) DESTINATION ABBREVIATIONS Australian model South African model British model Chinese model Canadian model South-east Asia model German model Taiwan model European model U.S.A.
  • Page 28 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 OVERALL ASSEMBLY R140 R130 R110 R110 R20b R150 R100 R20a R120 R20c B110 L 13942296513 B120 B130 B100 B120 B130 P200 u163 http://www.xiaoyu163.com...
  • Page 29 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. OVERALL ASSEMBLY EMX620 Overall Assembly (V474430) Overall Assembly (V474440) Overall Assembly (V474450) Overall Assembly (V474460) Overall Assembly (V474470) V 4 7 4 6 7 0 0 Body Assembly Panel Assembly (V474550)
  • Page 30 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. EG340290 R120 Bind Head Tapping Screw-B 4.0X6 MFZN2BL U,V,H,W,B,A V 4 7 7 3 4 0 0 R130 Holder, Cord V 5 0 6 4 6 0 0 R140 Bind Head Screw 4.0X10 MFZN2BL SP...
  • Page 31 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS QTY RANK REF NO. ELECTRICAL PARTS EMX620 V4681000 Circuit Board (XW829B0) V4681200 Circuit Board (XW828B0) V4681400 Circuit Board (XW828B0) V4681500 Circuit Board H,W,B,A (XW828B0) V4681000 Circuit Board (XW829B0) VB966900 IMSA-6024...
  • Page 32 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. VZ587700 SW201 Push Switch 2C-2S Lock CH-3 PAD VZ587700 SW202 Push Switch 2C-2S Lock CH-4 PAD VV051500 SW401 Slide Switch SSSU012NB1-YL PHANTOM VU804900 SW501 Push Switch SPEA31MC16-YL VOCAL,L HALL,S HALL VU805000...
  • Page 33 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. VV061200 Mylar Capacitor 6800P 50V J C: 422,534 VV060100 Mylar Capacitor 1500P 50V J C: 515,518,523 VV060600 Mylar Capacitor 3300P 50V J C: 535,538 VV064400 Monolithic Mylar Capacitor 0.82 50V J C: 435...
  • Page 34 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. VV058400 Flame Proof C. Resistor 390.0 1/4 J R: 113,115,207,239 VV065100 Metal Film Resistor 2.2K 1/4 F R: 129,131,137,139,215,219, 247,251 VV065400 Metal Film Resistor 8.2K 1/4 F R: 130,132,138,140,216,220, 248,252 VV065500...
  • Page 35 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. VE198800 Q113 Transistor 2SC2705 O,Y VE198700 Q114 Transistor 2SA1145 O,Y VE198800 Q115 Transistor 2SC2705 O,Y V2797700 Q116 Transistor 2SC5395 E,F V2797600 Q117 Transistor 2SA1993 E,F VP872600 Q122 Transistor...
  • Page 36 http://www.xiaoyu163.com EMX620 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS QTY RANK REF NO. VV557800 Flame Proof C. Resistor 1.0 1/4 J R: 145-147,150 VR412900 Metal Film Resistor 0.1 3W J R: 143,144 VV066000 Metal Film Resistor 33K 1/4 F R: 110 VV313500 Metal Film Resistor...
  • Page 37 http://www.xiaoyu163.com OVERALL CIRCUIT DIAGRAM EMX620 3 7 6 3 1 5 1 5 0 LED DRIVER OP AMP OP AMP OP AMP G.EQUALIZER OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP...
  • Page 38 http://www.xiaoyu163.com CIRCUIT BOARD EMX620 MIX Circuit Board - B version 3 7 6 3 1 5 1 5 0 Transition measure Component Side 1999, 12 lot 2000, 1-4 lot MIX Circuit Board - C version Bond Bond Pattern Side Pattern Side 1 3 9 4 2 2 9 6 5 1 3 Component Side MIX (B version):...

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