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Yamaha EMX 66M Service Manual

Manual is about: Powered mixer

Summary of EMX 66M

  • Page 1

    Service manual hamamatsu, japan 1,387k-2101 printed in japan 2002.03 pa 011626 contents specifications .............................................................................. 3 panel layout .................................................................................. 7 circuit board layo...

  • Page 2

    2 emx66m 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 t...

  • Page 3

    3 emx66m specifications ● general specifications • 0 db=0.775 vrms maximum output power 300 w + 300 w/4 Ω @0.5% thd at 1 khz (speakers out a, b) 205 w + 205 w/8 Ω @0.5% thd at 1 khz (speakers out a, b) 600 w/8 Ω @0.5% thd at 1 khz (bridge) frequency response 20 hz–20 khz +1 db, –3 db @1 w output int...

  • Page 4

    4 emx66m ● input specificaitons ● output specificaitons input connectors pad actual load impedance nominal impedance input level connector type sensitivity 1 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 ga...

  • Page 5

    5 emx66m.

  • Page 6

    6 emx66m.

  • Page 7

    7 emx66m panel layout ● control panel 1. Control section • channel control equalizer (high, mid, low) monitor control effect control level control pad switch (ch1-4) • digital effect effect select switch on switch, indicator 1 pad —15 +15 1 high mid low level monitor effect —15 +15 —15 +15 0 +15 0 +...

  • Page 8

    8 emx66m ➇ graphic equalizer ⑨ effect rtn control ➉ aux in control 2tr in control master control peak level indicator • main • monitor • phantom switch, indicator • yamaha speaker processing graphic equalizer effect rtn control 2tr in control master control peak level indicator phantom on/off switch...

  • Page 9

    9 emx66m • power switch, indicator power on/off switch, indicator 2. Input/output section ● rear panel input terminal (hi-z, low-z) (ch1-4) input terminal (line, mic, super hi-z) (ch5-6) effect out terminal foot sw terminal input to main terminal (aux in, 2tr in) output terminal (rec out, main, moni...

  • Page 10

    10 emx66m circuit board layout & wiring pwr 3/4 pwr 4/4 pwr 2/4 mix66 pwr 1/4 dsp cn106 cn107 cn902 cn104 cn901 cn301 cn101 cn105 power transformer ac inlet dc fan power on/off 1 2 3 4 location connector assembly remarks parts no. 1 mix66-pwr1/4 24185&2426 15p l=700 v842620 2 mix66-dsp 100mm p=1.25 ...

  • Page 11

    11 emx66m dimensions 305mm 481.5mm 448.5mm 327.6mm 62mm ● front view ● side view ● front view with rack mount adaptor.

  • Page 12

    12 emx66m block & level diagram input to main foot sw ch input [ch 6] ch input [ch 1-4] ch input [ch 5] low-z hi-z super hi-z mic mic line aux in 2tr in mix66 dsp 1 2 3 1 2 3 4 1 2 3 1 2 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 ic101,301 ic501 ic601 ic603 ic603 ic501 ic502 ic502 ic703 ic703...

  • Page 13

    13 emx66m + + + + pwr 1/4 pwr 2/4 effect out monitor main rec out speakers bridge 1 2 a 1 2 b 1 2 3 4 1 2 3 4 1 2 3 4 ic901 ic705 ic805,806 ic705 ic702 ic903 ic903 sw701 sw910 ic802 ic706 ic803,804 cn902-15pin cn101-15pin w101re1 w101be1 w101re2 w101be2 3 1 2 1 3 1 5 7 3 1 5 7 9 1,2,3,4,6 9 1,2,3,4,...

  • Page 14

    14 emx66m dsp [160] [130] [130] [240] 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 fro...

  • Page 15

    15 emx66m 3. Mix66 circuit board (time required: about 18 min) 3-1. Remove the front panel assembly. (see procedure 1) 3-2. Remove the cable from the cord binder marked [240]. (fig.2) 3-3. Remove the shield case. (see procedure 2-2) 3-4. Pull out the connector assembly from cn301 on the dsp-zfx circ...

  • Page 16

    16 emx66m 4. Pwr circuit board 4/4 (time required: about 4 min) 4-1. Remove the front panel assembly. (see procedure 1) 4-2. Pinch slightly the stopper of the power switch escutcheon with a plyer, and pull it to the front to remove. (fig.7-1) 4-3. Remove the two (2) screws marked [90]. (fig.7-2) 4-4...

  • Page 17

    17 emx66m (fig. 9) 5-3. Hold the cord holder and pull the rear panel to the front to remove. (fig.9) note: when reinstalling, install the rear panel assembly and the front panel assembly in that order to connect the power supply connector easily. (fig. 10) [220] rear panel assembly 6. Pwr circuit bo...

  • Page 18

    18 emx66m 8. Pwr circuit board 1/4 (time required: about 10 min) 8-1. Remove the rear panel assembly. (see procedure 5) 8-2. Remove the pwr circuit board 2/4. (see procedure 6) 8-3. Remove the pwr circuit board 3/4. (see procedure 7) 8-4. Remove the sixteen screws marked [90] to remove the tr holder...

  • Page 19

    19 emx66m 9. Fan (time required: about 3 min) 9-1. Remove the rear panel assembly. (see procedure 5) 9-2. Remove the two (2) screws marked [130]. The fan can then be removed. (fig.8) 10. Power transformer (time required: about 4 min) 10-1. Remove the front panel assembly. (see procedure 1) 10-2. Rem...

  • Page 20

    20 emx66m lsi pin description pin no. Name i/o function pin no. Name i/o function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76...

  • Page 21

    21 emx66m pin no. Name i/o function pin no. Name i/o function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 p12/ani2 p13/ani3 p14/ani4 p15/ani5 p16/ani6 p17/ani7 p72/sck2/asck p71/so2/txd p70/si2/rxd p101/t16/t06 p100/t15/t...

  • Page 22

    22 emx66m ic block diagram 74hcu04dt (xz110a00) inverter dsp-zfx: ic302 1 1a 2 3 4 5 6 7 1y 2a 2y 3a 3y v ss 8 9 10 11 12 13 14 v dd 6a 6y 5a 5y 4a 4y tc74hc138afel (xw762a00) 3 to 8 demultiplexer 1 2 3 4 5 6 7 a a select enable output output b b c c g2a g2a g2b g2b g1 g1 y7 y7 y5 y4 y3 y2 y1 y0 y6 ...

  • Page 23

    23 emx66m circuit boards contents mix66 circuit board (component side) ................................................................................................. 24 mix66 circuit board (pattern side) ................................................................................................

  • Page 24

    24 emx66m high mid low monitor effect level pad high mid low monitor effect level pad high mid low monitor effect level pad high mid low monitor effect level high mid low monitor effect level high mid low monitor effect level pad hi-z hi-z hi-z hi-z low-z low-z low-z low-z mic mic super hi-z 1 super...

  • Page 25

    25 emx66m effect out foot sw aux in 2tr in 1 2tr in 2 rec out 1 rec out 2 main monitor power +6 +3 0 -5 -10 +6 +3 0 -5 -10 yamaha speaker processing power amp mode phamtom on / off monitor graphic equalizer main graphic equalizer effect rtn effect rtn aux in 2tr in 2tr in master master on voval echo...

  • Page 26

    26 emx66m a a' ● mix66 circuit board.

  • Page 27

    27 emx66m a a' pattern side 3na-v826690 1.

  • Page 28

    28 emx66m to mix66-cn901 ● dsp circuit board component side 3na-v826710 1.

  • Page 29

    29 emx66m pattern side 3na-v826710 1.

  • Page 30

    30 emx66m to pwr2/4-w101be2 to pwr to pwr2/4-w101re2 to pwr1/4-w103or1 to mix66-cn902 a a' ● pwr 1/4 circuit board.

  • Page 31

    31 emx66m to pwr1/4-w103or2 to fan assembly to power tranceformer to pwr2/4-w101bl2 to pwr2/4-w101wh2 a a' component side 3na-v826900 1.

  • Page 32

    32 emx66m to pwr 1/4-w101re1 to pwr 1/4-w101be1 to pwr 1/4-w101bl1 to pwr 1/4-w101wh1 bridge speakers 1 2 1 2 a b ● pwr 2/4 circuit board component side ac in to power tranceformer to pwr 4/4-cn107 component side ● pwr 3/4 circuit board on / off to pwr 3/4-w102ye/w102br ● pwr 4/4 circuit board compo...

  • Page 33

    33 emx66m inspections 0. Preparation (1) mesuring instruments • oscillator (ballance output type, output impedance 150 Ω ) • oscilloscope (input impedance 100k Ω ) • level meter (input impedance 100k Ω ) • distortion meter (2) notes for mesuring • noise level must be mesured by using din audio filte...

  • Page 34

    34 emx66m 2.2 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(l,r) monitor out effect out rec out low-z -62 +4 ± 2 +4 ± 2 +4 ± 2 -13.8 ± 2 mic -32 (pad on) hi-z -52 +4 ± 2 - - - line -22 +4 ± 2 -...

  • Page 35

    35 emx66m 2.6 led meter check when the output level of main out and monitor out meets the table 2.6-1, confirm that the corresponding led meter starts to light up. Table 2.6-1 [unit: dbs] led +6 +3 0 -5 -10 output level +10 ± 2 +7 ± 2 +4 ± 2 -1 ± 2 -6 ± 2.5 2.7 distortion rate check on condition of ...

  • Page 36

    36 emx66m table 2.12-1 effect operation output level (monitor output) vocal echo 1 press the on switch no output [din audio] -48dbs vocal echo 2 set the level to minimum no output [din audio] -48dbs vocal reverb 1 - recognizable vocal reverb 2 - no output [din audio] -48dbs hall 1 switch the foot sw...

  • Page 37

    37 emx66m 3.1.6 harmonic distortion rate check note: this mesurement should be finished in 30 seconds. • apply 1khz signal into input terminal, and confirm that output level of 300w/4 Ω (33.0dbs) can be gained with harmonic distortion rate less than 0.5%. • apply 20hz, 1khz and 20khz signal into inp...

  • Page 38

    38 emx66m 3.2 for the case that the power amp switch is 'main bridge' 3.2.1 preparation • power amp switch: main bridge • input terminal: ch 5 line 1 • master (main): max • output terminal: bridge • load resistance: 8 Ω (more than 600w) except otherwise indicated, the load resistance of speaker shou...

  • Page 39

    39 emx66m.

  • Page 40

    40 emx66m.

  • Page 41

    41 emx66m.

  • Page 42

    42 emx66m.

  • Page 43

    43 emx66m.

  • Page 44

    44 emx66m.

  • Page 45

    Emx66m emx66m emx66m a b c d e f g h 1 2 3 4 5 emx66m emx66m overall circuit diagram 1/7 (mix66 1/5) mix66 op amp op amp op amp op amp op amp op amp op amp (from p.3 f-4) (to p.3 a-3) (to p.4 b-4) (to p.3 a-4) (from p.3 a-5) (from p.5 g-5) (from p.5 g-4) (to p.2 g-5) 38cc1-8822115-2 1.

  • Page 46

    H g f e d c b a 1 2 3 4 5 emx66m emx66m emx66m emx66m op amp op amp op amp op amp op amp op amp op amp (from p.3 f-4) (from p.5 g-5) (from p.5 g-4) (to p.3 a-3) (to p.4 b-4) (to p.3 a-4) (from p.3 a-5) (from p.1 g-5) 38cc1-8822115-3 1 emx66m overall circuit diagram 2/7 (mix66 2/5).

  • Page 47

    Emx66m emx66m emx66m a b c d e f g h 1 2 3 4 5 emx66m op amp op amp op amp op amp op amp op amp op amp led driver led driver op amp (to p.1 g-1) (to p.2 g-1) (from p.5 g-4) (from p.5 g-4) (to p.4 b-2) (to p.4 b-3) (from p.4 e-1) (from p.5 g-4) (from p.5 g-5) (to p.1 g-5) (to p.2 g-5) (from p.4 g-5) ...

  • Page 48

    H g f e d c b a 1 2 3 4 5 emx66m emx66m emx66m emx66m to dsp-cn301 op amp op amp op amp demultiplexer (to p.3 a-4) (to p.3 a-4) (from p.2 g-4) (from p.1 g-4) (from p.3 g-2) (from p.3 g-2) (to p.5 c-1) (to p.5 g-4) (to p.5 c-3) (to p.3 g-5) (from p.5 g-4) (from p.5 g-5) (from p.5 g-5) (from p.5 g-4) ...

  • Page 49

    Emx66m emx66m emx66m a b c d e f g h 1 2 3 4 5 emx66m op amp op amp op amp op amp (to p.4 g-1) (to p.3 g-5) (to p.2 g-1) (to p.1 g-5) (to p.4 d-2) (to p.3 g-4) (to p.3 g-4) (to p.4 g-1) (to p.4 g-1) (to p.3 g-5) (to p.2 g-1) (to p.1 g-5) (to p.4 g-1) (to p.4 g-2) (from p.4 d-2) (from p.4 d-3) (to p....

  • Page 50

    H g f e d c b a 1 2 3 4 5 emx66m emx66m emx66m emx66m dsp op amp inverter eeprom 1k mic dsp dram 4m adc 38cc1-8822165-2 1 to mix66-cn901 emx66m overall circuit diagram 6/7 (dsp).

  • Page 51

    Emx66m emx66m emx66m a b c d e f g h 1 2 3 4 5 emx66m common power transformer install not install not install pwr 1/4 pwr 4/4 pwr 2/4 pwr 3/4 regulator +15v regulator -15v regulator +5v to mix66-cn902 to pwr1/4-w103or1 to power transformer to power transformer bridge 2 1 1 2 speakers ac in to fan a...

  • Page 52: Parts List

    1 emx66m parts list warning components having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. Contents overall assembly .........................................................................................................

  • Page 53

    2 emx66m overall assembly upc label 80 70 10 41 42 43 60 40 50 100 b40 b120 b110 b10 b40 b40 b30 b50 b60 b20 b80 b90 b70 b130 90 44 44 110

  • Page 54

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 3 emx66m * * * * * * * * * * * -- -- -- -- -- -- -- -- -- v 7 8 7 1 8 0 0 x2294a00 x2295a00 x2296a00 x2297a00 v 7 0 1 9 8 0 0 eg340190 vr138400 vb132700 -- vb132700 vb403600 vp156800 va039300 -- v 8 3 2 2 5 0 0 v 8 3 2 2 6 0...

  • Page 55

    4 emx66m ■ front panel assembly 150 160 130 170 180 120 240 30 100 110 200 190 41 40 10 20 230 220 210 70 60 80 50 60 70 80 90

  • Page 56

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 5 emx66m * * * * * * 10 20 30 40 41 50 60 70 80 90 100 110 120 130 150 160 170 180 190 200 210 220 230 240 -- v 8 3 2 9 3 0 0 v 8 2 6 6 9 0 0 v 3 2 9 1 6 0 0 v 3 2 8 9 8 0 0 vn413300 v 6 2 2 5 3 0 0 v 6 2 2 5 6 0 0 v 6 2 2 5...

  • Page 57

    6 emx66m ■ rear panel assembly 130 170 240 160 140 220 230 30b 30c 30d 40 30a 50 20 80 60 90 10 70 110 100 120 180 150 240 150

  • Page 58

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 7 emx66m 10 10 10 10 20 30a 30a 30b 30c 30c 30c 30d 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 220 230 240 -- -- -- -- v 8 3 2 8 8 0 0 v 8 3 2 8 9 0 0 v 8 3 2 9 0 0 0 v 8 3 2 9 1 0 0 -- aax32870 aax32880 aax32890 ...

  • Page 59

    8 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m c301 c302 c303 c304 c305 c306 c307 c308 c309 c310 c311 c312 c313 c314 c315 -317 c318 c319 c320 c321 c322 c323 c324 c325 c326 c327 c328 -331 c332 c333 c334 c335 c336 c338 -340 c400 -408 c409 -413 c501 c502 cn301 d301...

  • Page 60

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 9 emx66m 2sc2412k q,r,s 2sc2412k q,r,s dta114eka tp dtc114eka tp 2sc3326 a,b te85r 100 0.1 j 100 0.1 j 10k 0.1 j 22k 0.1 j 10k 0.1 j 22k 0.1 j 10k 0.1 j 22k 0.1 j 22k 0.1 j 10k 0.1 j 22k 0.1 j 1.0k 0.1 j 1.0m 0.1 j 1.0m 0.1 ...

  • Page 61

    10 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m c122 -125 c126 c202 c203 c204 -207 c208 c209 -211 c212 c213 c214 c215 c216 c217 c218 c219 c220 c221 c302 c303 c304 -307 c308 c309 -311 c312 c313 c314 c315 c316 c317 c318 c319 c320 c321 c322 -325 c326 c401 c402 c403...

  • Page 62

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 11 emx66m c518 c519 c520 c521 c522 c523 c524 c526 c527 -530 c602 c603 c604 -607 c608 c609 -611 c613 c614 c615 c616 c617 c618 c619 c622 c623 c624 c626 c627 -630 c631 c632 c633 c634 c635 c636 c637 c638 c702 c703 c704 c705 c706...

  • Page 63

    12 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m c737 c738 c741 -748 c751 c752 c753 c754 c761 -764 c771 c772 c773 c774 c775 c777 c778 c781 c782 c785 c802 c803 c804 c805 c806 c808 c809 c810 c811 c812 c813 c814 c816 c817 c818 c819 c820 c821 c822 c823 c824 c825 c826...

  • Page 64

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 13 emx66m c909 c910 c911 c912 c913 c914 c915 c917 c921 c925 c927 cn901 cn902 d601 -604 d701 d801 d901 d902 em901 ic101 ic102 ic301 ic302 ic501 ic502 ic601 ic603 ic702 ic703 -706 ic707 ic802 ic803 -806 ic807 ic901 ic902 ic903...

  • Page 65

    14 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m ld806 ld901 ld902 ld903 ld904 ld905 ld906 ld907 ld908 ld909 ld910 ld911 ld912 ld913 q101 q102 q201 q202 q301 q302 q401 q402 q501 q502 q601 q602 q701 q702 q703 q704 q705 q706 q707 q801 q802 q803 q804 q805 q806 q807 ...

  • Page 66

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 15 emx66m -131 r132 r133 r134 r135 r202 r203 r205 r206 r207 r208 r209 r210 r211 r212 r213 r214 r215 r216 r217 r218 r219 r220 r221 r222 r223 r224 r225 r226 r227 r228 r229 -231 r232 r233 r234 r235 r302 r303 r305 r306 r307 r308...

  • Page 67

    16 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m r402 r403 r404 r405 r406 r407 r408 r409 r410 r411 r412 r413 r414 r415 r416 r417 r418 r419 r420 r421 r422 r423 r424 r425 r426 r427 r428 r429 -431 r432 r433 r434 r435 r502 r503 r505 r506 r507 r508 r509 r510 r511 r512...

  • Page 68

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 17 emx66m r608 r609 r610 r611 r612 r613 r614 r615 r616 r617 r618 r619 r620 r621 r622 r623 r624 r625 r626 r627 r628 r629 -633 r636 r637 r638 r639 r640 r641 r642 r643 r644 r645 r646 r701 r702 r703 r704 r705 r706 r710 r711 r712...

  • Page 69

    18 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m -768 r771 r772 r773 r774 r775 r776 r778 r779 r780 r781 r784 r785 r786 r787 r788 r789 r790 r791 r792 r812 r813 r814 r816 r817 r818 r819 r820 r821 r824 r825 r826 r827 r828 r829 r830 r831 -833 r834 r835 r851 -857 r861...

  • Page 70

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 19 emx66m r907 r908 r909 r910 r911 r912 r913 r914 r915 r916 r917 -925 r926 r928 r930 r934 r935 r936 r938 r940 r944 r951 r952 sw101 sw201 sw301 sw401 sw701 sw702 sw901 sw902 sw903 sw904 sw905 sw906 sw907 sw908 sw909 sw910 vr1...

  • Page 71

    20 emx66m rotary variable resistor rotary variable resistor rotary variable resistor rotary variable resistor rotary variable resistor rotary variable resistor rotary variable resistor rotary variable resistor rotary variable resistor slide variable resistor slide variable resistor slide variable re...

  • Page 72

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 21 emx66m ceramic capacitor-sl electrolytic cap. Electrolytic cap. Ceramic cap.-b ceramic cap.-b ceramic capacitor-sl electrolytic cap. Mylar capacitor electrolytic cap. Electrolytic cap. Electrolytic cap. Electrolytic cap. ...

  • Page 73

    22 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m diode zener diode diode diode diode stack diode diode diode stack diode diode stack diode diode stack diode stack diode terminal plate terminal plate fuse fuse fuse fuse fuse fuse fuse ic ic ic jumper wire jumper w...

  • Page 74

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 23 emx66m transistor digital transistor transistor transistor transistor transistor transistor transistor pair transistor pair transistor pair transistor pair transistor transistor transistor pair transistor pair transistor ...

  • Page 75

    24 ref no. Part no. Description remarks qty rank rank: japan only *: new parts emx66m flame proof c. Resistor flame proof c. Resistor wire wound resistor wire wound resistor flame proof c. Resistor flame proof c. Resistor flame proof c. Resistor flame proof c. Resistor flame proof c. Resistor wire w...

  • Page 76

    Ref no. Part no. Description remarks qty rank rank: japan only *: new parts 25 emx66m wire wound resistor flame proof c. Resistor wire wound resistor flame proof c. Resistor wire wound resistor flame proof c. Resistor flame proof c. Resistor flame proof c. Resistor flame proof c. Resistor flame proo...

  • Page 77

    26 emx66m ■ rk-88 rack mount kit 10 20 ref no. Part no. Description remarks qty rank vb132700 -- rack mount kit bind head screw rack angle 4.0x12 mfzn2bl rk-88 (v840830) 01 10 20 6 2 rank: japan only *: new parts 本资料由ＯＫＸＩＡ视听皮带资源库ｗｗｗ．ｏｋｘｉａ．ｃｎ提供.