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Yamaha EMX62M Service Manual
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Yamaha EMX62M Service Manual

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See also: Owner's Manual
SERVICE MANUAL
EMX62M
• OPTION
RK-88 RACK MOUNT KIT
CONTENTS
SPECIFICATIONS .............................................................................. 3
PANEL LAYOUT .................................................................................. 7
CIRCUIT BOARD LAYOUT & WIRING
.......................................................................................................... 10
DIMENSIONS .................................................................................... 11
BLOCK & LEVEL DIAGRAM ............................................................. 12
DISASSEMBLY PROCEDURE ......................................................... 14
LSI PIN DESCRIPTION .................................................................... 19
IC BLOCK DIAGRAM ........................................................................ 20
CIRCUIT BOARDS ........................................................................... 21
INSPECTION .................................................................................... 29
OVERALL CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper with soy ink.
PARTS LIST
PA 011627
HAMAMATSU, JAPAN
1,387K-939
Printed in Japan 2002.03

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  • Page 1 SERVICE MANUAL EMX62M • OPTION RK-88 RACK MOUNT KIT CONTENTS SPECIFICATIONS ................3 PANEL LAYOUT .................. 7 CIRCUIT BOARD LAYOUT & WIRING ......................10 DIMENSIONS ..................11 BLOCK & LEVEL DIAGRAM ............. 12 DISASSEMBLY PROCEDURE ............14 LSI PIN DESCRIPTION ..............19 IC BLOCK DIAGRAM ................
  • Page 2 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: Specifications

    EMX62M SPECIFICATIONS G General specifications 135 W/8Ω @0.5% THD at 1 kHz (SPEAKERS OUT) Maximum output power 200 W/4Ω @0.5% THD at 1 kHz (SPEAKERS OUT) 175 mW/40Ω @0.5% THD at 1 kHz (PHONES OUT) 20 Hz–20 kHz +1 dB, –3 dB @1 W output into 8Ω (SPEAKERS OUT) Frequency response 20 Hz–20 kHz +1 dB, –3 dB @+4 dB output into 10 kΩ...
  • Page 4 EMX62M G Input specificaitons Input level Actual load Nominal Connector Input connectors PAD impedance impedance type Sensitivity Nominal level Max. before cliping 50–600Ω Mics –62 dB (0.616 mV) –50 dB (2.45 mV) –20 dB (77.5 mV) CH INPUT (Lo-Z) XLR-3-31 3 kΩ...
  • Page 5 EMX62M...
  • Page 6 EMX62M...

  • Page 7: Panel Layout

    EMX62M PANEL LAYOUT G CONTROL PANEL 1. CONTROL SECTION • Channel Control Equalizer (HIGH, LOW) ➁ MONITOR control ➂ EFFECT control √ LEVEL control ➄ PAD switch (CH1-4) ➁ ➂ ➃ ➄ • Digital Effect ≈ EFFECT select switch ∆...
  • Page 8 AUX IN control 2TR IN control MASTER control Peak Level Indicator LIMITER indicator € • MONITOR EFFECT RTN control MASTER control • PHANTOM switch, indicator PHANTOM ON/OFF switch • YAMAHA SPEAKER PROCESSING ON/OFF switch • POWER switch, indicator POWER ON/OFF switch, indicator...
  • Page 9 EMX62M 2. INPUT/OUTPUT SECTION INPUT terminal (Hi-Z, Low-Z) (CH1-4) INPUT terminal (LINE 1, 2) (CH5) INPUT terminal (Super Hi-Z) (CH6) EFFECT OUT terminal FOOT SW terminal INPUT TO MAIN terminal (AUX IN) INPUT TO MAIN terminal (2TR IN) OUTPUT terminal (REC OUT)
  • Page 10 EMX62M CIRCUIT BOARD LAYOUT & WIRING PWR 1/3 PWR 2/3 PWR 3/3 Power Transformer MIX62 2/2 MIX62 1/2 Location Connector Assembly Remarks Parts No. PWR 1/3 MIX621/2-PWR1/3 2426&2426 14P L=700 (V842610) PWR1/3-PWR2/3 B&B2P (V828330) CN103 PWR3/3-MIX622/2 V8272900 AC INLET CN104...

  • Page 11: Dimensions

    EMX62M DIMENSIONS G Front View G Side View 481.5mm 327.6mm G Front View with Rack Mount Adaptor 62mm 448.5mm...
  • Page 12 EMX62M BLOCK & LEVEL DIAGRAM MIX62 SW401 IC101,201 IC102,202 Low-Z CH INPUT CH1-4 IC401 Hi-Z SW101-102 SW201-202 IC301 IC301 CH INPUT LINE IC302 IC303 IC302 CH INPUT Super Hi-Z IC303 AUX IN IC404 INPUT TO MAIN IC401 2TR IN 25,27...
  • Page 13 EMX62M 1,2,3,4,6 PWR 2/3 IC406 SPEAKERS PWR 1/3 [+4db] IC408,409 MAIN OUT IC401 IC402 MAIN IC407 W101RE1 W101RE2 SW403 W101BL1 W101BL2 OUTPUT REC OUT PHONES MONITOR OUT IC401 IC402 EFFECT OUT IC403 IC403 38CA1-8822112 A’...

  • Page 14: Disassembly Procedure

    EMX62M DISASSEMBLY PROCEDURE Front Panel Assembly (Time required: about 3 min) 1-1. Remove the seven (7) screws marked [80] and the screw 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 panel assembly can then be removed.
  • Page 15 EMX62M 2-3. Remove the six (6) screws marked [160] to remove the shield plate. (Fig.3) 2-4. Remove the fifteen (15) screws marked [40], the nine (9) screws marked [41], and the fourteen (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 marked [70], and the eight (8) knobs marked [80].
  • Page 16 EMX62M MIX62 Circuit Board 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 switch escutcheon with a plyer, and pull it to the front to remove. (Fig.6-1) 3-3.
  • Page 17 EMX62M PWR Circuit Board 2/3 (Time required: about 7 min) 5-1. Remove the rear panel assembly. (See Procedure 4) 5-2. Remove the screw marked [100] and the two (2) hexagonal nuts marked [C]. The PWR circuit board 2/3 can then be removed. (Fig.7)
  • Page 18 EMX62M Power Transformer (Time required: about 6 min) 8-1. Remove the rear panel assembly. (See Procedure 4) 8-2. Remove the four (4) screws marked [43]. The power transformer can then be removed. (Fig.11) [43] Power Transformer (Fig. 11) [43]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190) Front Frame (Time required: about 6 min) 9-1.

  • Page 19: Lsi Pin Description

    EMX62M LSI PIN DESCRIPTION YSS234 (XN299A00) Digital Sound Processor MIX62: IC507 NAME FUNCTION NAME FUNCTION  AVDD DC A+5Vs bus   DC D+5V   External RAM interface data TST0 DC D+5V   TST1 DC D+5V  ...

  • Page 20: Ic Block Diagram

    EMX62M IC BLOCK DIAGRAM 74HC74DT (X2167A00) 74HC14DT (X2166A00) NJM2060M (TE2) OP (XM560A00) Dual D-Type Flip-Flop Hex Inverter Quad Operational Amplifier MIX62: IC505 MIX62: IC504 MIX62: IC408, IC409 1CRL 2CLR INPUTS OUTPUTS NJM2068MD-T1 (XJ553A00) LB1423N XZ348A00 NJM4558L-D(XQ212A00) NJM4558MT-1 (IG103520) LED Driver...

  • Page 21: Circuit Boards

    EMX62M CIRCUIT BOARDS CONTENTS MIX62 1/2 CIRCUIT BOARD (COMPONENT SIDE) ................... 22 MIX62 1/2 CIRCUIT BOARD (PATTERN SIDE) ....................24 PWR 1/3 CIRCUIT BOARD (COMPONENT SIDE) ..................... 26 PWR 2/3 CIRCUIT BOARD (COMPONENT SIDE) ..................... 28 PWR 3/3 CIRCUIT BOARD (COMPONENT SIDE) ..................... 28 MIX62 2/2 CIRCUIT BOARD (COMPONENT SIDE) ...................
  • Page 22 EMX62M MIX62 1/2 Circuit Board HIGH HIGH HIGH HIGH HIGH HIGH VOCAL LARGE HA SMALL HA MONITOR MONITOR MONITOR MONITOR MONITOR MONITOR EFFECT EFFECT EFFECT EFFECT EFFECT EFFECT LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL Hi-Z Hi-Z Hi-Z Hi-Z LINE 1...
  • Page 23 EMX62M PHAMTOM VOCAL ON / OFF LARGE HALL SMALL HALL MASTER EFFECT RTN YAMAHA SPEAKER PROCESSING ON / OFF GRAPHIC EQUALIZER MASTER EFFECT RTN AUX IN 2TR IN POWER to PWR1/3-CN101 PHONES 2TR IN 1 REC OUT 1 EFFECT OUT...
  • Page 24 EMX62M MIX62 1/2 Circuit Board...
  • Page 25 EMX62M Pattern side...
  • Page 26 EMX62M PWR 1/3 Circuit Board to PWR2/3-W101BL2 to PWR2/3-W101RE2...
  • Page 27 EMX62M to Power Transformer Component side 3NA-V826840...
  • Page 28 EMX62M PWR 2/3 Circuit Board SPEAKERS to PWR 1/3-W101BL1 to PWR 1/3-W101RE1 PWR 3/3 Circuit Board to Power Tranceformer to MIX62 2/2-CN001 AC IN MIX62 2/2 Circuit Board ON / OFF to PWR 3/3 Component side Pattern side 1Pin-W102YE 2Pin-Non Connect...

  • Page 29: Inspection

    DIGITAL EFFECT ON switch: MAIN GRAPHIC EQUALIZER (7 band) fader: CENTER EFFECT RTN level control: AUX IN level control: 2TR IN level control: MASTER (MAIN) level control: MONITOR EFFECT RTN level control: MASTER (MAIN) level control: PHANTOM switch: YAMAHA SPEAKER PROCESSING switch: OFF...

  • Page 30: Low-Z -

    EMX62M Gain Check On condition of 2.1, confirm that the output level of each terminal meets the table 2.2-1. Table 2.2-1 [unit: dBs] INPUT INPUT LEVEL MAIN OUT MONITOR OUT EFFECT OUT REC OUT PHONES OUT Low-Z +4±2 +4±2 +4±2 -13.8±2...
  • Page 31 EMX62M Distortion Rate Check On condition of 2.1, set the INPUT and MASTER volume for each terminal to nominal position. Then, confirm that the distortion rate is within 0.3% when the output level is +14dBs. (except REC OUT and PHONES OUT) Maximum Output Level Check At MAIN OUT, MONITOR OUT, EFFECT OUT terminals on condition of 2.7, confirm that the output level of +20dBs can be...
  • Page 32 Apply 70Hz / -26dB signal into input terminal, and confirm that the output level is within 6.5±2dB from the level for 1kHz input with YAMAHA SPEAKERS PROCESSING switch OFF. Besides, confirm that the LED lights up when YAMAHA SPEAKERS PROCESSING switch is ON and that LED goes out when the switch is OFF.
  • Page 33 EMX62M Stability Check (1) Connect 10pF~0.47µF capacitor in parallel to the 4Ω load resistance and apply rectangule signal of 10kHz/-26dBs. Then, confirm that overshoot and ringing are as follows. < _ _ Overshoot: Vp/Vo Ringing: within 5 waves (2) Connect 10µH~0.47H inductor in series to the 4Ω load resistance and apply rectangule signal of 10kHz/-26dBs.
  • Page 34 EMX62M...
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  • Page 39: Overall Circuit Diagram

    <P.1> EMX62M EMX62M EMX62M OVERALL CIRCUIT DIAGRAM 1/5 (MIX62 1/2 (1/4)) MIX62 1/2 OP AMP OP AMP OP AMP OP AMP (From P.3 F-2) (to P.3 B-2) OP AMP (to P.3 B-5) (to P.3 B-4) OP AMP (From P.4 G-3) OP AMP (From P.4 G-3)
  • Page 40 <P.2> EMX62M EMX62M EMX62M CIRCUIT DIAGRAM 2/5 (MIX62 1/2 (2/4)) (From P.1 B-5) (From P.4 G-3) OP AMP OP AMP (From P.4 G-4) OP AMP OP AMP (to P.3 B-2) (to P.3 B-5) OP AMP (to P.3 B-4) OP AMP OP AMP (From P.4 G-3)
  • Page 41 <P.3> EMX62M EMX62M EMX62M CIRCUIT DIAGRAM 3/5 (MIX62 1/2 (3/4)) (to P.1 G-3) OP AMP (From P.4 G-3) LED DRIVER (From P.4 G-3) (From P.1 H-4) (From P.2 G-4) (From P.4 G-5) OP AMP OP AMP OP AMP (to P.4 G-2) OP AMP (From P.1 H-4)
  • Page 42 <P.4> EMX62M EMX62M EMX62M CIRCUIT DIAGRAM 4/5 (MIX62 1/2 (4/4)) OP AMP S-INVERTER (From P.3 G-3) (to P.1 G-4) (to P.2 G-5) (to P.3 G-2) SRAM 256K (to P.3 G-2) D-FF (to P.1 G-5) (to P.2 G-1) (to P.3 G-5) OP AMP (to P.1 G-5)

  • Page 43: Ic102

    <P.5> EMX62M EMX62M EMX62M CIRCUIT DIAGRAM 5/5 (PWR1/3, PWR2/3, PWR3/3) NJM7815FA(XD853A00) REGULATOR +15V PWR 1/3 PWR1/3: IC103 Destimation Power Transformer Not Install Not Install Not Install Not Install 1: OUTPUT 2: COMMON 3: INPUT NJM7915FA(XD854A00) REGULATOR -15V PWR1/3: IC104 1: OUTPUT...

  • Page 44: Table Of Contents

    EMX62M PARTS LIST RACK MOUNT KIT RK-88 CONTENTS OVERALL ASSEMBLY ...................... 2 FRONT PANEL ASSEMBLY ....................4 REAR PANEL ASSEMBLY ....................6 ELECTRICAL PARTS ....................... 8 RK-88 RACK MOUNT KIT ....................20 Note) DESTINATION ABBREVIATIONS Australian model South African model...
  • Page 45 EMX62M I OVERALL ASSEMBLY B130 B120 B110...

  • Page 46: Overall Assembly

    EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. OVERALL ASSEMBLY Overall Assembly (V833030) Overall Assembly (V833040) Overall Assembly H,B,W (V833050) Overall Assembly (V833060) Body Assembly J COM (V832150) Rear Panel Assembly (V833130) (V833140) Rear Panel Assembly Rear Panel Assembly...
  • Page 47 EMX62M I FRONT PANEL ASSEMBLY...

  • Page 48: Front Panel Assembly

    EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. FRONT PANEL ASSEMBLY Front Panel Assembly J COM (V833170) V 8 3 3 2 7 0 0 Front Panel AAX33320 Circuit Board MIX62 1/2 (V826700) AAX33330 Circuit Board MIX62 2/2 (V826700)
  • Page 49 EMX62M I REAR PANEL ASSEMBLY...

  • Page 50: Rear Panel Assembly

    EMX62M PART NO. DESCRIPTION REMARKS QTY RANK REF NO. REAR PANEL ASSEMBLY Rear Panel Assembly (V833130) Rear Panel Assembly (V833140) Rear Panel Assembly (V833150) Rear Panel Assembly (V833160) V 8 3 3 2 2 0 0 Rear Panel V 8 3 3 2 3 0 0...

  • Page 51: Electrical Parts

    EMX62M ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS QTY RANK REF NO. ELECTRICAL PARTS AAX33320 Circuit Board MIX62 1/2 (V826700)(X0620B0) AAX33330 Circuit Board MIX62 2/2 (V826700)(X0620B0) AAX32940 Circuit Board PWR B62 1/3 J, U (V826840)(X0625B0) AAX32950 Circuit Board PWR B62 1/3...
  • Page 52 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. UX063100 C223 Ceramic Capacitor (chip) 1000P 50V K UR847470 C224 Electrolytic Cap. 47.00 25.0V VV488800 C226 Electrolytic Cap. LLM 10.00 50.0V VV488800 C227 Electrolytic Cap. LLM 10.00 50.0V UR847100 C228 Electrolytic Cap.
  • Page 53 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. UX061680 C427 Ceramic Capacitor (chip) 68P 50V J UX061680 C428 Ceramic Capacitor (chip) 68P 50V J UX062100 C429 Ceramic Capacitor (chip) 100P 50V J UX064100 C430 Ceramic Capacitor (chip) 0.0100 50V K...
  • Page 54 EMX62M PART NO. DESCRIPTION REMARKS QTY RANK REF NO. UR847100 C536 Electrolytic Cap. 10.00 25.0V UX145100 C537 Ceramic Capacitor (chip) 0.1000 25V Z UA953330 C538 Mylar Capacitor 3300P 50V J UX062100 C539 Ceramic Capacitor (chip) 100P 50V J UX145100 C540 Ceramic Capacitor (chip) 0.1000 25V Z...
  • Page 55 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. V 7 4 2 1 7 0 0 -204 Transistor (chip) 2SC2SC3324 GR,BL VV655400 Q501 Digital Transistor DTC114EKA TP V 7 4 2 1 8 0 0 Q502 Transistor 2SA2SA1312 GR,BL...
  • Page 56 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. RF356820 R220 Carbon Resistor (chip) 8.2K D 1608 RG004100 R221 Carbon Resistor (chip) 10 0.1 J RF357100 R222 Carbon Resistor (chip) 10.0K D 1608 RF357100 R223 Carbon Resistor (chip) 10.0K D 1608...
  • Page 57 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. RG007180 Carbon Resistor (chip) R333 18K 0.1 J RG007180 Carbon Resistor (chip) -338 18K 0.1 J RG008120 Carbon Resistor (chip) R401 120K 0.1 J Carbon Resistor (chip) RG008120 -403 120K 0.1 J...
  • Page 58 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. RG005100 R516 Carbon Resistor (chip) 100 0.1 J RG006220 R517 Carbon Resistor (chip) 2.2K 0.1 J RG006220 -519 Carbon Resistor (chip) 2.2K 0.1 J RG007100 R520 Carbon Resistor (chip) 10K 0.1 J...
  • Page 59 EMX62M PART NO. DESCRIPTION REMARKS QTY RANK REF NO. V 8 2 6 4 6 0 0 VR502 Rotary Variable Resistor A 20.0K XV09213P EFFECT RTN (MONITOR) QU007700 X501 Ceramic Resonator 12M CSA12.0MTZ AAX32940 Circuit Board PWR B62 1/3 J, U...
  • Page 60 EMX62M PART NO. DESCRIPTION REMARKS QTY RANK REF NO. VZ354300 C161 Ceramic Capacitor-E 0.0022 500 M VV067400 CN101 Connector Base Post M2426XX 14P TE LB932060 CN103 Base Post Connector VH- 6P TE LB932030 CN104 Base Post Connector VH- 3P TE...
  • Page 61 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. VV081700 Q123N Pair Transistor B1647/D2560 VP872700 Q124 Transistor 2SC4488 S,T VV081700 Q125P Pair Transistor B1647/D2560 VD678700 Q126 Digital Transistor DTC114ES VD678500 Q127 Digital Transistor DTA114ES V 2 7 9 7 7 0 0...
  • Page 62 EMX62M DESCRIPTION REMARKS PART NO. QTY RANK REF NO. VV315400 RY101 Relay DC OSA-SH-224DM3M W101 Connector Assembly B&B2P (V828330) V 3 2 2 5 0 0 0 W101a Ferrite Core FR25/15/12-D40 V 8 2 7 2 9 0 0 W102...

  • Page 63: Rack Mount Kit

    EMX62M I RK-88 RACK MOUNT KIT PART NO. DESCRIPTION REMARKS QTY RANK REF NO. RACK MOUNT KIT RK-88 VB132700 Bind Head Screw 4.0X12 MFZN2BL Rack Angle (V840830) *: New Parts RANK: Japan only...

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