Question about Yamaha EMX512SC Powered Mixer 500 Watts Stereo 12 Channels 3 Band Equalizer Lightweight Design

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Monitors not working on Yamaha EMX512SC, worked once added a keyboard,now we can't get them to work.

What needs to be on/off to make the monitors work?

Posted by susan long on

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Ellie Chandler

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Do you mean there is no sound coming from your monitors? Check whether you've accidentally diverted the main-mix signal from main-out (or whatever you have your monitors plugged into). Can you get a headphone mix?Also, dumb question, check that nothing is soloed!

Posted on May 01, 2012

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Fred Yearian

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SOURCE: Yamaha keyboard not working

First thing is to verify the power supply voltage, including that on the board.

This can affect the threshold of the keyboard scanning and cause keys to not work although some other things appear to work.

Replacing that chip in the filed is not practical, so whole board would be considered the FRU. One can probably get one from Yamaha America parts in CA.

Before doing that, checking the scanning signals and feedback from the keys needs to be checked with a scope. Also verify that the analog power amp section is working.

Posted on Feb 25, 2010

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Fred Yearian

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SOURCE: I'm using a Yamaha FC7

you CANNOT do this connection!!! Period !!! It will not work electronically The keyboards are fighting eachother as each is driving audio into the WYE. If you want to control both levels you need to use a controller that has two separate controls. At one point such a device was made but not sure if they still are... Here is a candidate:

http://www.google.com/products/catalog?hl=en&q=volume+pedal+dual&rlz=1R2ADFA_enUS400&gs_upl=4797l11703l0l12063l17l14l0l1l1l0l1031l4813l0.1.6.3.6-1.1l12l0&bav=on.2,or.r_gc.r_pw.&biw=1203&bih=624&wrapid=tlif131583417165610&um=1&ie=UTF-8&tbm=shop&cid=16799990617547769868&sa=X&ei=RQluTpqgO4fXiAKV09W8Dg&ved=0CCUQ8wIwAQ#

Posted on Sep 12, 2011

John McPherson

  • 1212 Answers

SOURCE: why is the yamaha emx512sc so light weight

Because it is solid state for one.

It is also a Class D type amplifier, so the 500 watts is only a a peak rating and not very accurate, it is not an RMS rating, there is a big difference.

Class D amps chop up the music stream so it is not a continuous signal like analog signals are. It has a generalized block diagram similar to a power inverter or an AM transmitter. You ear is not likely going to notice the difference.

Posted on Feb 05, 2012

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Because it is solid state for one.

It is also a Class D type amplifier, so the 500 watts is only a a peak rating and not very accurate, it is not an RMS rating, there is a big difference.

Class D amps chop up the music stream so it is not a continuous signal like analog signals are. It has a generalized block diagram similar to a power inverter or an AM transmitter. You ear is not likely going to notice the difference.

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