Yamaha-EMX-62-M-Service-Manual电路原理图.pdf

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1、SERVICE MANUAL HAMAMATSU, JAPAN 1,387K-939 Printed in Japan 2002.03 PA011627 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

2、 . 29 OVERALL CIRCUIT DIAGRAM PARTS LIST EMX62M This document is printed on chlorine free (ECF) paper with soy ink. OPTION RK-88 RACK MOUNT KIT RadioFans.CN 收音机爱 好者资料库 2 EMX62M IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It h

3、as 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 resu

4、lt 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:T

5、his 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

6、(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 app

7、ear to exist, please contact the distributors 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:T

8、urn 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

9、 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

10、 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 TH

11、E 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 c

12、orrespond 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 connecte

13、d 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

14、 are marked and must be replaced with parts having specification equal to those originally installed. RadioFans.CN 收音机爱 好者资料库 3 EMX62M SPECIFICATIONS G General specifications Maximum output power 135 W/8 0.5% THD at 1 kHz (SPEAKERS OUT) 200 W/4 0.5% THD at 1 kHz (SPEAKERS OUT) 175 mW/40 0.5% THD at

15、1 kHz (PHONES OUT) Frequency response 20 Hz20 kHz +1 dB, 3 dB 1 W output into 8 (SPEAKERS OUT) 20 Hz20 kHz +1 dB, 3 dB +4 dB output into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT) Total harmonic distortion Less than 0.5% 20 Hz20 kHz, 100 W output into 4 (SPEAKERS OUT) Less than 0.3% 20 Hz20 kHz, +14 d

16、B output into 10 k (MAIN OUT, MONITOR OUT, EFFECT OUT) Hum & noise (Average, Rs=150) (with 20 Hz20 kHz BPF) 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) Master level control: nom

17、inal level Channel level controls: minimum 69 dB (73 dB S/N) (MAIN OUT, MONITOR OUT) Master level control: nominal level 1 channel level control: nominal level 75 dB (79 dB S/N) (EFFECT OUT) All channel level controls: minimum 69 dB (73 dB S/N) (EFFECT OUT) 1 channel level control: nominal level Max

18、imum voltage gain 86 dB CH IN (Lo-Z) to SPEAKERS OUT (CH14) 66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT (CH14) 66 dB CH IN (Lo-Z) to EFFECT OUT (CH14) 48 dB CH IN (Lo-Z) to REC OUT (CH14) 56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT (CH14) 26 dB LINE IN to MAIN OUT (CH5) 26 dB AUX IN to MAIN OUT 22 d

19、B 2TR IN to MAIN OUT 46 dB Super Hi-z IN to MAIN OUT (CH6) Crosstalk at 1 kHz65 dB adjacent input, 65 dB input to output Input channel equalization 15 dB Maximum HIGH10 kHz shelving * LOW100 Hz shelving * * Turn over/roll-off frequency of shelving: 3 dB below maximum variable level. Meters5 points L

20、ED Meter (10, 5, 0, +3, +6 dB) MAIN OUT Graphic equalizer 7 bands (125, 250, 500, 1k, 2k, 4k, 8k Hz) MAIN OUT 12 dB Maximum Internal digital effect3 programs (VOCAL REVERB, LARGE HALL, SMALL HALL) Phantom power+15 V (balanced input) LimiterComp. : THD0.5% (SPEAKERS OUT) LIMIT indicatorTurn on. : THD

21、0.5% (SPEAKERS OUT) Protection circuit (Power amp) POWER switch on/off mute DC detection Temp (Heatsink Temp90C) Foot switch (FC5)DIGITAL EFFECT MUTE : on/off Optional accessoriesRK-88, FC5 Power requirement USA and Canada: 120 V AC 60 Hz Europe:230 V AC 50 Hz Other:240 V AC 50 Hz Power consumption1

22、10 W Dimensions (WxHxD)482 x 305 x 328 mm Weight12 kg Supplied accessoriesAC power cord, Owners Manual 4 EMX62M G Input specificaitons G Output specificaitons Input connectorsPAD Actual load impedance Nominal impedance Input level Connector type Sensitivity*1 *1. Sensitivity is the lowest level that

23、 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.) Nominal levelMax. before cliping CH INPUT (Lo-Z) (CH14) OFF 3 k 50600 Mics62 dB (0.616 mV)50 dB (2.45 mV)20 dB (77.5 mV) XLR-3-31 type*2 *2. Balanc

24、ed. ON600 Lines32 dB (19.5 mV)20 dB (77.5 mV)+10 dB (2.45 V) CH INPUT (Hi-Z) (CH14) OFF 10 k 50600 Mics52 dB (1.95 mV)40 dB (7.75 mV)10 dB (245 mV) Phone jack (TRS)*2 ON600 Lines22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V) LINE IN (CH5) (12)10 k600 Line22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Pho

25、ne jack*3 *3. Unbalanced. 0 dB= 0.775 Vrms, 0 dBV= 1 Vrms. Super Hi-Z IN (CH6) (12)470 k1k42 dB (6.16 mV)30 dB (24.5 mV)0 dB (0.775 V)Phone jack*3 AUX IN10 k600 Line22 dB (61.6 mV)10 dB (245 mV)+20 dB (7.75 V)Phone jack*3 2TR IN (12)10 k600 Line22 dBV (79.4 mV)10 dBV (316 mV)+17.8 dBV (7.76 V)Phono

26、jack PHONE JACKS are unbalanced. 0 dB= 0.775 Vrms, 0 dBV= 1 Vrms. Output connectors Actual source impedance Nominal impedance Output level Connector type NominalMax. before cliping SPEAKERS OUT (1, 2)0.14/8 Speaker40 W/4200 W/4Phone jack MAIN OUT60010 k Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jack M

27、ONITOR OUT60010 k Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jack EFFECT OUT60010 k Lines+4 dB (1.23 V)+20 dB (7.75 V)Phone jack PHONES OUT3540 Phones33 mW175 mWPhone jack REC OUT (1, 2)60010 k Lines10 dBV (316 mV)+10 dBV (3.16 V)Phono jack 5 EMX62M 6 EMX62M 7 EMX62M PANEL LAYOUT G CONTROL PANEL 1. CON

28、TROL SECTION Channel Control xEqualizer (HIGH, LOW) MONITOR control EFFECT control LEVEL control PAD switch (CH1-4) Digital Effect EFFECT select switch ON switch, indicator x 8 EMX62M 17 Graphic Equalizer EFFECT RTN control AUX IN control 2TR IN control MASTER control Peak Level Indicator LIMITER in

29、dicator MAIN MONITOR PHANTOM switch, indicator YAMAHA SPEAKER PROCESSING POWER switch, indicator EFFECT RTN control MASTER control PHANTOM ON/OFF switch POWER ON/OFF switch, indicator 101 112 13 14 1516 18 19 ON/OFF switch 11 12 13 14 15 16 17 18 19 9 EMX62M 2. INPUT/OUTPUT SECTION G REAR PANEL INPU

30、T 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)

31、 SPEAKERS 1, 2 terminal AC IN socket 21 1235678910 1 14 1 2 3 4 5 6 7 8 9 10 11 1 2 10 EMX62M CIRCUIT BOARD LAYOUT & WIRING PWR 3/3 MIX62 2/2 PWR 2/3 PWR 1/3 CN103 CN107 CN903 CN104 CN101 Power Transformer AC INLET POWER ON/OFF 1 2 3 LocationConnector AssemblyRemarksParts No. 1MIX621/2-PWR1/32426&24

32、26 14P L=700(V842610) 2PWR1/3-PWR2/3B&B2P(V828330) 3PWR3/3-MIX622/2PSWV8272900 6P 3P 3P 15P 15P MIX62 1/2 PWR 3/3 PWR 1/3 MIX62 2/2 MIX62 1/2 PWR 2/3 Power Transformer 11 EMX62M DIMENSIONS 305mm 481.5mm 448.5mm 327.6mm 62mm G Front ViewG Side View G Front View with Rack Mount Adaptor 12 EMX62M BLOCK

33、 & LEVEL DIAGRAM INPUT TO MAIN FOOT SW CH INPUT CH6 CH INPUT CH5 CH INPUT CH1-4 Low-Z Hi-Z 1 2 1 2 LINE 1 AUX IN 2TR IN Super Hi-Z 2 (MUTE) MIX62 12 3 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 IC101,201 SW401 IC301 2,6 3,5 1,7 31 IC302 31 IC303 57 IC303 IC507 SW501SW503 SW101-102 SW201

34、-202 31 IC404 67 IC401 67 IC401 21 IC IC102,202 IC301 IC302 5 IC403 67 9 11 13 15 16 25,27 A A 13 EMX62M +4db SPEAKERS A B MAIN MAIN OUT MONITOR OUT PHONES EFFECT OUT + - PWR 1/3 PWR 2/3 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 SW403 IC401 7 IC401 1 IC402 IC408,409 57 IC406 8 1,2,3,4,6 IC407 31 IC403 7 IC402

35、 31 IC403 31 OUTPUT REC OUT CN501-14PIN CN101-14PIN W101RE1W101RE2 W101BL1W101BL2 38CA1-8822112 A A 14 EMX62M 80 80 90 100 Body Assembly Front Panel Assembly 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. (

36、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) (Fig. 1) 80:Bind Head Screw 4.0X12 MFZN2BL (VB132700) 90:Bind Head Screw 4.0X20 MFZN2BL (VB403600) 100: Bind Head Screw A4.0X8 MFZN2BL (VP15680

37、0) (Fig. 2) 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) 170 170: Cord Binder TS-0708 KSS (VZ765100) 15 EMX62M 160 Top View Bottom View (Fig. 3) 160 Bind Head Tapping Screw

38、-B 3.0X6 MFZN2BL (EP600230) 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 mar

39、ked 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) 70 60 80 50 4040404040 607090 AA4141 (Fig. 4) 40:

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) 16 EMX62M 44:Bind Head Tapping

41、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. 6-1) 3.MIX62 Circuit Board 2/2 (Time required: about 4 min) 3-1.Remove the front panel assembly. (See

42、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) PullPullPu

43、ll PushPushPush PushPushPush MIX 2/2 90 110 90 110 90 110 (Fig. 6-2) 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

44、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 4444 C 10090 100 Pull UpPull UpPull Up Rear Panel AssemblyRear Panel AssemblyRear Panel Assembly Body AssemblyBod

45、y AssemblyBody Assembly (Fig. 7) (Fig. 8) 90:Bind Head Screw 3.0X8 MFZN2BL (VB659000) 110: Power Switch Knob MX12/4 (VU859000) 17 EMX62M 30 80 60 30 30 60 80 70 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

46、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,

47、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) (Fig. 9) 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 (EP6