1. DL manuals
  2. Yamaha
  3. Music Mixer
  4. EMX860ST
  5. Service Manual

Yamaha EMX860ST Service Manual

Other manuals for EMX860ST: Owner's Manual

Summary of EMX860ST

  • Page 1

    Service manual pa 011457 19990220-99800 1.96k-296 printed in japan ’99.03 hamamatsu, japan contents specifications ................................................ 3/4 panel layout .................................... 5 circuit board layout ................. 7 block diagram ............................

  • Page 2: Warning

    Emx860st 2 impor tant 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 under- stood by the users, and h...

  • Page 3

    Ch input (lo-z) off 3 k Ω 50–600 Ω mics –62 db (616 µ v) –50 db (2.45 mv) –20 db (77.5 mv) xlr-3-31 (ch1–6) on 600 Ω lines –32 db (19.5 mv) –20 db (77.5 mv) +10 db (2.45 v) type ch input (hi-z) off 10 k Ω 50–600 Ω mics –52 db (1.95 mv) –40 db (7.75 mv) –10 db (245 mv) phone jack (ch1–6) on 600 Ω lin...

  • Page 4

    4 emx860st.

  • Page 5: Panel Layout

    Emx860st 5 1 2 3 4 5 6 equalizer controls (high, mid, low) monitor controls (moni) effect control (effect) pan control (bal/pan control for ch7/8) level control (level) pad switch (pad) (1-6 only) panel layout 0 10 l r –15 +15 –15 +15 –15 +15 0 10 0 10 1 1 level low pad moni pan effect mid high 1 2 ...

  • Page 6

    Emx860st 6 14 15 16 17 18 19 monitor section 0 10 +6 +3 0 –5 –10 • 6 • 0 • 6 • master effect rtn monitor 125 250 500 1k 2k 4k 8k –12 +12 • 6 • 0 • 6 • –12 +12 0 10 10 11 12 13 +6 +3 0 –5 –10 l r main stereo master effect rtn aux in tape in 125 250 500 1k 2k 4k 8k • 6 • 0 • 6 • –12 +12 • 6 • 0 • 6 • ...

  • Page 7

    7 emx860st rec out tape in output l l l r r r l (mono) r main(stereo) monitor aux in powered mixer foot sw mic lo-z hi-z line effect out input to main l r (mono) mic line l r (mono) lo-z hi-z lo-z hi-z lo-z hi-z lo-z hi-z lo-z hi-z 1 2 3 4 5 6 speakers power r l b a b a b on/ off a monitor l+r bridg...

  • Page 8

    8 emx860st block & level diagram kec-92359.

  • Page 9: Disassembly Procedure

    Emx860st 9 disassembly procedure 1. Mix circuit board 1-1 remove the six (6) screws marked [30]. The panel assembly can then be removed. (fig. 1) 1-2 remove the sixty-three (63) knobs, the seventeen (17) hexagonal nuts marked [a] and the seventeen (17) screws marked [p120]. (fig. 1) 1-3 remove the f...

  • Page 10

    Emx860st 10 3. Pwr 1/3, 2/3, 3/3 circuit boards 3-1 remove the panel assembly. (see procedure 1.) 3-2 remove the two (2) connectors from the power transformer and the six (6) screws marked [50]. The rear assembly can then be removed. (fig. 3) 3-3 remove the six (6) screws marked [r150]. The radiatin...

  • Page 11

    Ic block diagram 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 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 ...

  • Page 12

    12 emx860st circuit boards mix circuit board component side led installation cn803: to sub-cn101 led led spacer circuit board note : see parts list for details of circuit board component parts..

  • Page 13

    Cn101: to mix -cn803 cn301: to pwr -cn101 cn202: to mix -cn802 cn201: to mix -cn801 sub circuit board component side 3na-v295250 13 emx860st.

  • Page 14

    Cn104 : to pwr 1/3 -w101re-1 -w101bl-2 -w101be-3 -w101wh-4 -w101or-5 -w101br-6 14 emx860st pwr 1/3 circuit board component side kec-72360 component side component side pwr 2/3 circuit board pwr 3/3 circuit board cn105: to ac cable cn106: to transformer cn101: to sub-cn301 cn102: to transformer.

  • Page 15: Inspections

    Emx860st 15 inspections 1. Measuring instruments low frequency oscillator: balance output, output impedance = 150 ohms oscilloscope: input impedance >= 100 kohms level meter: input impedance >= 100 kohms note: use a balance input measuring instrument 2. Mixer part 2-1 setting conditions setting cond...

  • Page 16

    Emx860st 16 hi-z -52 +1 - - - 2-4 gain each output gain should be as shown in the table below. Table 1: input ch 1-ch 6 [units: dbs] input terminal input level main out (l, r) monitor out effect out rec out (l, r) lo-z -62 -32 (pad on) +1 +4 +10 -16.8 note: when the power amp mode switch is set to t...

  • Page 17

    Emx860st 17 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 6 [units: dbs] led name lighting level +6 +10 ± 2 +3 +7 ± 2 0 +4 ± 2 -5 -1 ± 2 -10 -6 ± 2.5 2-9 distortion set each volume control of the input sect...

  • Page 18

    Emx860st 18 3. Power amplifier part 3-1 setting conditions setting conditions are as follows unless otherwise specified. Input terminal: input ch 8 line l power amp switch: stereo measuring output terminal: (speakers) l-a, r-a, monitor-a output load: 4 ohm (more than 200 w) connect the resistor when...

  • Page 19

    Emx860st 19 3-9 protection apply a 10 hz sine wave signal to the input; increase the input signal 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, conf...

  • Page 20

    Emx860st 20

  • Page 21

    Emx860st 21.

  • Page 22

    Emx860st 22.

  • Page 23

    Emx860st 23.

  • Page 24

    Emx860st 24.

  • Page 25: Parts List

    Parts list contents overall assembly ............................................. 2 electrical parts ............................................ 4 warning components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. ...

  • Page 26: Overall Assembly

    Emx860st 2 overall assembly r40 r30a r50 r80 r80 r60 r20 r60 r120 r30c r30b r200 r170 r190 r210 r210 r140 r130 r100 r110 r150 r90 b10 b20 b110 b120 b90 b100 b110 b120 b50 b60 b40 b80 b70 p30 p40 p10 p50 p70 p60 p90 p80 p120 p60 p70 p90 p120 p20 p150 p130 p140 p100 p110 40 60 10 70 30 20 80 90 100 50...

  • Page 27

    3 : new parts ref no. Part no. Description remarks qty rank rank : japan only emx860st * * * * * * * * * * * * * * * * : new parts ref no. Part no. Description remarks qty rank rank : japan only overall assembly emx860st overall assembly j j (v290650) overall assembly u v u,v (v290660) overall assem...

  • Page 28

    : new parts ref no. Part no. Description remarks qty rank rank : japan only 4 emx860st electrical parts * * * * : new parts ref no. Part no. Description remarks qty rank rank : japan only electrical parts emx860st circuit board mix (xv182c0) circuit board pwr j j (xv183b0) circuit board pwr u u,v (x...

  • Page 29

    Emx860st 5 : new parts ref no. Part no. Description remarks qty rank rank : japan only -358 ceramic capacitor-f 0.01 50v z 01 c401 electrolytic cap. 47.00 50.0v 01 c402 electrolytic cap. 10.00 50.0v 01 c403 electrolytic cap. 10.00 50.0v 01 c404 electrolytic cap. 10.00 25.0v 01 c405 electrolytic cap....

  • Page 30

    Emx860st 6 : new parts ref no. Part no. Description remarks qty rank rank : japan only c529 ceramic capacitor-f 0.01 50v z 01 c530 ceramic capacitor-f 0.01 50v z 01 c531 mylar capacitor 0.01 50v j 01 c532 mylar capacitor 0.012 50v j 01 c533 mylar capacitor 0.015 50v j 01 c534 mylar capacitor 0.01 50...

  • Page 31

    Emx860st 7 : new parts ref no. Part no. Description remarks qty rank rank : japan only * * c643 ceramic capacitor-sl 100p 50v j 01 c644 ceramic capacitor-sl 47p 50v j 01 c645 ceramic capacitor-sl 47p 50v j 01 c646 electrolytic cap. 10.00 25.0v 01 c647 electrolytic cap. 10.00 25.0v 01 c648 electrolyt...

  • Page 32

    Emx860st 8 : new parts ref no. Part no. Description remarks qty rank rank : japan only ic203 ic njm4558l op amp 01 ic203 ic njm4558l-d 03 ic301 ic njm2068l-d op amp 02 ic302 ic njm4558l op amp 01 ic302 ic njm4558l-d 03 ic303 ic njm4558l op amp 01 ic303 ic njm4558l-d 03 ic401 ic njm2068l-d op amp 02 ...

  • Page 33

    Emx860st 9 : new parts ref no. Part no. Description remarks qty rank rank : japan only ld801 led lt311g-41-c13 re power amp(limiter) 01 ld802 led lt311g-41-c13 re moni(limiter) 01 ld803 led lt321-41-c13 gr power 01 ld804 led lt311g-41-c13 re digital effect(on) 01 q101 transistor 2sc2240 gr,bl 01 -10...

  • Page 34

    Emx860st 10 : new parts ref no. Part no. Description remarks qty rank rank : japan only r165 carbon resistor 18.0k 1/4 j 01 r166 carbon resistor 18.0k 1/4 j 01 r167 carbon resistor 220.0 1/4 j 01 r168 carbon resistor 220.0 1/4 j 01 r169 carbon resistor 1.8k 1/4 j 01 r170 carbon resistor 1.8k 1/4 j 0...

  • Page 35

    Emx860st 11 : new parts ref no. Part no. Description remarks qty rank rank : japan only r268 carbon resistor 220.0 1/4 j 01 r269 carbon resistor 1.8k 1/4 j 01 r270 carbon resistor 1.8k 1/4 j 01 r271 carbon resistor 10.0k 1/4 j 01 r272 carbon resistor 10.0k 1/4 j 01 r273 carbon resistor 10.0 1/4 j 01...

  • Page 36

    Emx860st 12 : new parts ref no. Part no. Description remarks qty rank rank : japan only r371 carbon resistor 10.0k 1/4 j 01 r372 carbon resistor 10.0k 1/4 j 01 r373 carbon resistor 10.0 1/4 j 01 r374 carbon resistor 10.0 1/4 j 01 r375 carbon resistor 18.0k 1/4 j 01 -382 carbon resistor 18.0k 1/4 j 0...

  • Page 37

    Emx860st 13 : new parts ref no. Part no. Description remarks qty rank rank : japan only r505 flame proof c. Resistor 390.0 1/4 j 01 r506 metal film resistor 6.8k 1/4 f 01 r507 carbon resistor 4.7k 1/4 j 01 r508 carbon resistor 10.0 1/4 j 01 r509 carbon resistor 10.0 1/4 j 01 r510 metal film resistor...

  • Page 38

    Emx860st 14 : new parts ref no. Part no. Description remarks qty rank rank : japan only r619 carbon resistor 10.0k 1/4 j 01 r620 carbon resistor 10.0k 1/4 j 01 r621 carbon resistor 18.0k 1/4 j 01 r622 carbon resistor 18.0k 1/4 j 01 r623 carbon resistor 13.0k 1/4 j 01 r624 carbon resistor 10.0k 1/4 j...

  • Page 39

    Emx860st 15 : new parts ref no. Part no. Description remarks qty rank rank : japan only * * * * * * * * * * * * * * * r820 carbon resistor 12.0k 1/4 j 01 r821 carbon resistor 12.0k 1/4 j 01 sw101 push switch 2-2 1ch(pad) 01 sw102 push switch 2-2 2ch(pad) 01 sw201 push switch 2-2 3ch(pad) 01 sw202 pu...

  • Page 40

    Emx860st 16 * * * * * * : new parts ref no. Part no. Description remarks qty rank rank : japan only circuit board assembly sp out (xv183b0) circuit board assembly ac j,u,v (xv183b0) circuit board assembly ac h,w,b,a (xv183b0) ferrite core fr25/15/12-d40 fuse holder cq-05ct 01 jumper wire 0.6 (vv2914...

  • Page 41

    Emx860st 17 : new parts ref no. Part no. Description remarks qty rank rank : japan only * c415 electrolytic cap. 330.00 100.0v 02 c416 electrolytic cap. 4.7 100.0v 01 c417 electrolytic cap. 4.7 100.0v 01 c418 electrolytic cap. 4.70 50.0v 01 c419 electrolytic cap. 10.00 25.0v 01 c420 electrolytic cap...

  • Page 42

    Emx860st 18 * * * * * * * * * * * * * : new parts ref no. Part no. Description remarks qty rank rank : japan only d412 zener diode mtz j 43 43.0v 01 -414 zener diode mtz j 43 43.0v 01 d415 zener diode mtz j 8.2b 8.2v 01 d416 diode 1n4004l 26 01 d417 diode 1n4004l 26 01 e101 terminal plate 01 f101 fu...

  • Page 43

    Emx860st 19 : new parts ref no. Part no. Description remarks qty rank rank : japan only * * * * * q308p pair transistor b1647/d2560 set q309n pair transistor b1647/d2560 set q310p pair transistor b1647/d2560 q311 transistor 2sa1708 s,t 01 q312 transistor 2sc4488 s,t 01 q313n pair transistor b1647/d2...

  • Page 44

    Emx860st 20 * * : new parts ref no. Part no. Description remarks qty rank rank : japan only r313 flame proof c. Resistor 220.0 1/4 j 01 -316 flame proof c. Resistor 220.0 1/4 j 01 r317 metal film resistor 0.10 3w j 01 r318 metal film resistor 0.10 3w j 01 r319 flame proof c. Resistor 1.0 1/4 j 01 -3...

  • Page 45

    Emx860st 21 : new parts ref no. Part no. Description remarks qty rank rank : japan only * c133 mylar capacitor 1500p 50v j 08 c134 mylar capacitor 0.1 50v j 01 c135 mylar capacitor 0.1 50v j 01 c136 ceramic capacitor-e 0.0022 500 m 01 c137 ceramic capacitor-e 0.0022 500 m 01 c138 ceramic capacitor-s...

  • Page 46

    Emx860st 22 * * : new parts ref no. Part no. Description remarks qty rank rank : japan only cn101 connector base post m2426xx 15p te 01 cn201 connector base post m2426xx 10p te 01 cn202 connector base post m2426xx 5p te 01 cn301 connector base post m2426xx 15p te 01 d101 diode 1ss133,176,hss104 01 -...

  • Page 47

    Emx860st 23 : new parts ref no. Part no. Description remarks qty rank rank : japan only q348 digital transistor dta114es 01 q349 transistor 2sa970 gr,bl 01 -351 transistor 2sa970 gr,bl 01 q352 transistor 2sc2240 gr,bl 01 q353 transistor 2sc1815 y,gr 01 q354 transistor 2sc1815 y,gr 01 q355 transistor...

  • Page 48

    Emx860st 24 : new parts ref no. Part no. Description remarks qty rank rank : japan only r316 carbon resistor 47.0k 1/4 j 01 r317 carbon resistor 82.0k 1/4 j 01 r318 carbon resistor 82.0k 1/4 j 01 r319 carbon resistor 220.0 1/4 j 01 r320 carbon resistor 4.7k 1/4 j 01 r321 carbon resistor 22.0k 1/4 j ...

  • Page 49

    Emx860st 25 : new parts ref no. Part no. Description remarks qty rank rank : japan only * * * * * * power transformer ul csa u,v power transformer ce h,w,b power transformer as a fan 3110kl05wb50l34 ac cord j vctf 2x0.75 12a j ac cord uc sjt 3x#18 10a u,v 06 ac cord e h05vv-f3x0.7510a h,w ac cord bs...

  • Page 50

    Emx860st 2 3 4 5 6 7 8 1 a h g f e d c b emx860st 9 11 10 12 13 14 15 i j k 15 14 13 11 12 10 9 8 7 6 5 4 3 2 1 a b d c e i f g h j k kec-92361-3 3 note : see parts list for details of circuit board component parts. Components having special characteristics are marked with parts having specification...

  • Page 51

    Emx860st 2 3 4 5 6 7 8 1 a h g f e d c b emx860st emx860st 9 11 10 12 13 14 15 i j k 15 14 13 11 12 10 9 8 7 6 5 4 3 2 1 a b d c e i f g h j k 1/3 emx860st circuit diagram2/2(sub,pwr) opamp opamp opamp opamp 330 r386 opamp opamp 330 r388 330 r389 opamp kec-92362-4 opamp 330 r387 330 r384 opamp 330 r...