Yamaha EMX-62-M Service Manual

SERVICE MANUAL

EMX62M

• OPTION RK-88 RACK MOUNT KIT

This document is printed on chlorine free (ECF) paper with soy ink.

PA 011627

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 P ARTS LIST

HAMAMATSU, JAPAN

1,387K-939 Printed in Japan 2002.03

EMX62M

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.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in per-

sonal injury, destruction of expensive components and failure of the product to per form as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative.

IMPORTANT: This presentation or sale of this 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 any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefor, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have

accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to

the unit.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical / electronic and / or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) 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 REASON WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder / 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 KINGDOM

Connecting the Plug and Cord

WARNING: THIS APPARATUS MUST BE EARTHED IMPORTANT: The wires in this main lead are coloured in accor-

dance with the following code: GREEN-AND-YELLOW: EARTH BLUE: NEUTRAL BROWN: LIVE

As the colours of the wires in the main lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The GREEN-and-YELLOW wire must be connected to the terminal in the plug that is marked with the letter E or the safety earth symbol (or coloured GREEN or GREEN-and-YELLOW). The BLUE wire must be connected to the terminal that is marked with the letter N (or coloured BLACK). The BROWN wire must be connected to the terminal that is marked with the letter L (or coloured RED).

This applies only to products distributed by Yamaha Kemble Music (U. K.) Ltd.

WARNING

Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed.

SPECIFICATIONS

● General specifications

Maximum output power

Frequency response

Total harmonic distortion

Hum & noise (Average, Rs=150Ω) (with 20 Hz–20 kHz BPF)

Maximum voltage gain

Crosstalk at 1 kHz 65 dB adjacent input, 65 dB input to output

Input channel equalization

Meters 5 points LED Meter (–10, –5, 0, +3, +6 dB) MAIN OUT Graphic equalizer Internal digital effect 3 programs (VOCAL REVERB, LARGE HALL, SMALL HALL)

Phantom power +15 V (balanced input) Limiter Comp. : THD≥0.5% (SPEAKERS OUT) LIMIT indicator Turn on. : THD≥0.5% (SPEAKERS OUT)

Protection circuit (Power amp)

Foot switch (FC5) DIGITAL EFFECT MUTE : on/off Optional accessories RK-88, FC5

Power requirement

Power consumption 110 W Dimensions (WxHxD) 482 x 305 x 328 mm Weight 12 kg Supplied accessories AC power cord, Owner’s Manual

135 W/8Ω @0.5% THD at 1 kHz (SPEAKERS OUT) 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) 20 Hz–20 kHz +1 dB, –3 dB @+4 dB output into 10 kΩ (MAIN OUT, MONITOR OUT, EFFECT OUT)

Less than 0.5% @20 Hz–20 kHz, 100 W output into 4Ω (SPEAKERS OUT) Less than 0.3% @20 Hz–20 kHz, +14 dB output into 10 kΩ (MAIN OUT, MONITOR OUT, EFFECT OUT)

–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) –69 dB (73 dB S/N)

(MAIN OUT, MONITOR OUT) –75 dB (79 dB S/N)

(EFFECT OUT) –69 dB (73 dB S/N)

(EFFECT OUT) 86 dB CH IN (Lo-Z) to SPEAKERS OUT (CH1–4)

66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT (CH1–4) 66 dB CH IN (Lo-Z) to EFFECT OUT (CH1–4) 48 dB CH IN (Lo-Z) to REC OUT (CH1–4) 56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT (CH1–4) 26 dB LINE IN to MAIN OUT (CH5) 26 dB AUX IN to MAIN OUT 22 dB 2TR IN to MAIN OUT 46 dB Super Hi-z IN to MAIN OUT (CH6)

±15 dB Maximum

HIGH 10 kHz shelving * LOW 100 Hz shelving *

* Turn over/roll-off frequency of shelving: 3 dB below maximum variable level.

7 bands (125, 250, 500, 1k, 2k, 4k, 8k Hz) MAIN OUT ±12 dB Maximum

POWER switch on/off mute DC detection Temp (Heatsink Temp≥90°C)

USA and Canada: 120 V AC 60 Hz Europe: 230 V AC 50 Hz Other: 240 V AC 50 Hz

Master level control: nominal level Channel level controls: minimum

Master level control: nominal level 1 channel level control: nominal level

All channel level controls: minimum

1 channel level control: nominal level

EMX62M

● Input specificaitons

Input connectors PAD

CH INPUT (Lo-Z) (CH1–4)

CH INPUT (Hi-Z) (CH1–4)

OFF

ON 600Ω Lines –32 dB (19.5 mV) –20 dB (77.5 mV) +10 dB (2.45 V)

OFF

ON 600Ω Lines –22 dB (61.6 mV) –10 dB (245 mV) +20 dB (7.75 V)

Actual load impedance

3 kΩ

10 kΩ

Nominal

impedance

Sensitivity

50–600Ω Mics –62 dB (0.616 mV) –50 dB (2.45 mV) –20 dB (77.5 mV)

50–600Ω Mics –52 dB (1.95 mV) –40 dB (7.75 mV) –10 dB (245 mV)

Input level

Nominal level Max. before c liping

Connector

type

XLR-3-31

type Phone jack

(TRS)

LINE IN (CH5) (1–2) 10 kΩ 600Ω Line –22 dB (61.6 mV) –10 dB (245 mV) +20 dB (7.75 V) Phone jack Super Hi-Z IN (CH6) (1–2)

470 kΩ 1kΩ –42 dB (6.16 mV) –30 dB (24.5 mV) 0 dB (0.775 V) Phone jack AUX IN 10 kΩ 600Ω Line –22 dB (61.6 mV) –10 dB (245 mV) +20 dB (7.75 V) Phone jack 2TR IN (1–2) 10 kΩ 600Ω Line –22 dBV (79.4 mV) –10 dBV (316 mV) +17.8 dBV (7.76 V) Phono jack

*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.) *2. Balanced. *3. Unbalanced.

• 0 dB= 0.775 Vrms, 0 dBV= 1 Vrms.

● Output specificaitons

Output connectors

Actual source

impedance

Nominal

impedance

Nominal Max. before cliping

SPEAKERS OUT (1, 2) 0.1Ω 4/8Ω Speaker 40 W/4Ω 200 W/4Ω Phone jack MAIN OUT 600Ω 10 kΩ Lines +4 dB (1.23 V) +20 dB (7.75 V) Phone jack MONITOR OUT 600Ω 10 kΩ Lines +4 dB (1.23 V) +20 dB (7.75 V) Phone jack EFFECT OUT 600Ω 10 kΩ Lines +4 dB (1.23 V) +20 dB (7.75 V) Phone jack PHONES OUT 35Ω 40 Ω Phones 33 mW 175 mW Phone jack REC OUT (1, 2) 600Ω 10 kΩ Lines –10 dBV (316 mV) +10 dBV (3.16 V) Phono jack

Output level

Connector type

*3 *3 *3

• PHONE JACKS are unbalanced.

• 0 dB= 0.775 Vrms, 0 dBV= 1 Vrms.

EMX62M

PANEL LAYOUT

● CONTROL PANEL

1. CONTROL SECTION

• Channel Control

①

➁

➂

Equalizer (HIGH, LOW)

①

MONITOR control

➁

EFFECT control

➂

LEVEL control

√

PAD switch (CH1-4)

➄

EMX62M

➃

➄

• Digital Effect

≈ EFFECT select switch ∆ ON switch, indicator

➅

➆

EMX62M

• MAIN

⑨

• MONITOR

➇

10 11

➇ Graphic Equalizer ⑨ EFFECT RTN control

➉ AUX IN control

2TR IN control

MASTER control

Peak Level Indicator

LIMITER indicator

EFFECT RTN control

MASTER control

• PHANTOM switch, indicator

• YAMAHA SPEAKER PROCESSING

• POWER switch, indicator

PHANTOM ON/OFF switch

ON/OFF switch

POWER ON/OFF switch, indicator

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)

OUTPUT terminal (MAIN)

OUTPUT terminal (MONITOR)

OUTPUT terminal (PHONES)

9 10

● REAR PANEL

SPEAKERS 1, 2 terminal

AC IN socket

EMX62M

CIRCUIT BOARD LAYOUT & WIRING

PWR 1/3

PWR 2/3

MIX62 1/2

PWR 3/3

Power T ransformer

MIX62 2/2

15P

CN101

PWR 2/3

PWR 1/3

AC INLET

PWR 3/3

MIX62 1/2

CN104

CN903

15P

CN103

Power T ransformer

CN107

MIX62 2/2

POWER ON/OFF

Location Connector Assembly Remarks Parts No.

1 MIX621/2-PWR1/3 2 PWR1/3-PWR2/3 B&B2P (V828330) 3 PWR3/3-MIX622/2 PSW V8272900

2426&2426 14P L=700

(V842610)

DIMENSIONS

● Front View ● Side View

305mm

EMX62M

481.5mm

● Front View with Rack Mount Adaptor

327.6mm

62mm

448.5mm

EMX62M

BLOCK & LEVEL DIAGRAM

MIX62

CH INPUT CH1-4

Hi-Z

CH INPUT CH5

CH INPUT

Super Hi-Z

CH6

AUX IN

INPUT TO MAIN

Low-Z

LINE

SW401

2 4

IC303

IC101,201

2,6 3,5

1,7

SW101-102 SW201-202

IC301

IC302

IC102,202

IC301

IC302

IC404

IC401

2TR IN

FOOT SW

(MUTE)

25,27

SW501 SW503

2 4

IC507

IC403

IC401

EMX62M

1,2,3,4,6

IC406

[+4db]

IC402

OUTPUT

REC OUT

IC408,409

MAIN OUT

2 4

SW403

PHONES

IC407

CN501-14PIN

PWR 1/3

CN101-14PIN

PWR 2/3

W101RE1 W101RE2

+ +

- -

W101BL1 W101BL2

SPEAKERS

MAIN

IC401

IC403

IC402

IC403

MONITOR OUT

EFFECT OUT

A’

38CA1-8822112

EMX62M

DISASSEMBLY PROCEDURE

1. 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. (Fig.1)

Body Assembly

Front Panel Assembly

[80]

[90]

[80]: Bind Head Screw 4.0X12 MFZN2BL (VB132700) [90]: Bind Head Screw 4.0X20 MFZN2BL (VB403600) [100]: Bind Head Screw A4.0X8 MFZN2BL (VP156800)

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 marked

[170]. (Fig.2)

[170]

[100]

[80]

(Fig. 1)

(Fig. 2)

[170]: Cord Binder TS-0708 KSS (VZ765100)

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]. The mix62 circuit board 1/2 can then be removed. (Fig.4)

Note: When placing the front panel assembly on

the table, take care not to weight the MIX62 circuit board 2/2. (Fig.5)

EMX62M

Top View

[160]

Bottom View

(Fig. 3)

[160] Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)

[50]

[40] [40] [40] [40] [40]

[70] [60] [80]

[60] [70] [90]

[A] [A][41][41]

(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) [90]: Bind Head Screw 3.0X8 MFZN2BL (VB659000)

(Fig. 5)

EMX62M

3. 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. Remove the two (2) screws marked [90]. (Fig.6-2) 3-4. Remove the power switch knob marked [110]. The

MIX62 circuit board 2/2 can then be removed. (Fig.6-2)

PushPush

PullPull

MIX 2/2

PushPush

[110]

[90]

(Fig. 6-1)

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]. (Fig.7)

4-3. Hold the cord holder and pull the rear panel to the

front to remove. (Fig.8)

Note: When reinstalling, install the rear panel

assembly and the front panel assembly in that order to connect the power supply connector easily.

[60]

[C]

(Fig. 6-2)

[90]: Bind Head Screw 3.0X8 MFZN2BL (VB659000)

[110]: Power Switch Knob MX12/4 (VU859000)

Pull UpPull Up

Rear Panel AssemblyRear Panel Assembly

[100]

[90]

[44]: 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. 7)

[100]

Body AssemblyBody Assembly

(Fig. 8)

[44][44]

5. 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)

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) screws marked [30], the six (6)

screws marked [60], the screw marked [70] and the three (3) screws marked [80]. The PWR circuit board 1/3 can then be removed. (Fig.9)

EMX62M

[70]

[60]

[80]

[30]

[60]

(Fig. 9)

[80]

[30]

[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 MFZN2BL (EP600230) [80]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

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 the

screw marked [100]. (Fig.7)

7-3. Remove the screw marked [170]. The PWR circuit

board 3/3 can then be removed. (Fig.10)

PWR 3/3

[170]

Rear Panel Assembly

(Fig. 10)

[170]: Bind Head Screw A4.0X6 MFZN2BL (EG340290)

EMX62M

[40]

[40][40]

Body Assembly

8. 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)

Power T ransformer

[43]

[43]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)

9. Front Frame (Time required: about 6 min)

9-1. Remove the front panel assembly. (See Procedure 1) 9-2. Remove the four (4) screws marked [50] to remove

the handle assembly. (Fig.12)

9-3. Remove the ten (10) screws marked [40]. The front

frame can then be removed. (Fig.13)

Body Assembly

Handle

[50] [50]

(Fig. 11)

(Fig. 12)

[50]: Bind Head Screw 4.0X16 MFZN2BL (EG340110)

(Fig. 13)

[40]: Bind Head Tapping Screw-P 4.0X30 MFZN2BL (V8322700)

LSI PIN DESCRIPTION

EMX62M

YSS234 (XN299A00) Digital Sound Processor

NO.

NAME I/O FUNCTION

1 MD4 I/O 33 AVDD - DC A+5Vs bus 2 MD3 I/O 34 VDD - DC D+5V 3 MD0 I/O External RAM interface data 35 TST0 - DC D+5V 4 MD1 I/O 36 TST1 - DC D+5V 5 MD2 I/O 37 DOEN - DC D+5V

        

PIN NO.

NAME I/O FUNCTION

MIX62: IC507

6 MCKO O Master clock output 38 SDO1 O N.C. 7 XO O Crystal oscillator connection 39 SDO0 O N.C. 8 XI I Crystal oscillator connection 40 WC O N.C.

9 ER0 I 41 BCO O N.C 10 ER1 I Eary refrection preset select 42 MA0 O 11 ER2 I 43 MA1 O 12 REV0 I 44 MA2 O 13 REV1 I Effect select 45 MA3 O 14 REV2 I 46 MA4 O 15 MUTEN I DC D+5V 47 MA5 O External RAM interface address 16 ICN I Initial clear 48 MA6 O 17 PRG I DC D+5V 49 MA7 O 18 MODE I Preset mode (H=DC +5V) 50 MA12 O 19 VSS - Ground 51 MA14 O 20 AVSS - Ground 52 VSS - Ground 21 CVA - N.C. 53 MA10 O 22 AORL O N.C. 54 MA011 O 23 AORR O N.C. 55 MA09 O External RAM interface address 24 CHL I Sample hold capacitor connection 56 MA8 O 25 AIL I Lch ADC input 57 MA13 O

    

                 

        

26 VDD - DC D+5V 58 VDD - DC D+5V 27 AIR I Rch ADC input 59 WEN I Write enable 28 CHR I Sample hold capacitor connection 60 OEN I Output enable 29 AOFL O Lch DAC output 61 CEN I Chip select 30 AOFR O Rch DAC output 62 MD7 I/O 31 AVDD - DC A+5V 63 MD6 I/O External RAM interface data 32 CVB I Rch midpoint voltage 64 MD5 I/O

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