Tip & How-To about Yamaha Mg102c Stereo Mixer

How to Set up Auxiliaries on a Mixer.

Here are some tips to set up the auxiliaries properly on your mixer:

  • Step1:
Your auxiliaries allow you to send the signal from a channel strip to somewhere else while maintaining the signal on the channel strip. For instance, you can use auxiliaries for monitor mixes for performers in a live environment. You can also use auxiliaries for external effects processors or a number of different situations.
  • Step2:
Set the auxiliaries to pre-fader to allow you to change the level for the auxiliary with the auxiliary knob but not with the channel fader. Most mixers have a "Pre" button that allows you to enable pre-fader mode. If you don't have the button pressed, your auxiliaries are in post-fader mode, which means your channel fader will affect the signal level of the auxiliary output. For monitor mixes, you usually want to use pre-fader so you can control monitor mixes independently from the front of house mix. Some effects processors will be better to run post-fader, though, so don't always rely on pre-fader.
  • Step3:
Send out your auxiliary sends. On the back of your board, you there are the auxiliary outputs. For a monitor mix, you will use these outputs to connect to the inputs of the monitors. When using an effects processor, you will use the auxiliary output to connect to the input of the effects processor.
  • Step4:
Plug in a return if necessary. If you are just doing monitors, you do not need returns to the mixer. When using effects processors though, you need a way to get your effected signal back to your mixer. Take the output of the effects processor and connect that to the return input on the back of the mixer. Now you will have to adjust the return section on your channel strip to get the desired signal.
  • Step5:
Use the auxiliary knob to set the desired level. Once you know if you are running pre- or post-fader, and you have your inputs and outputs all correct, you can start sending signal to your auxiliary output. Turn up the auxiliary knob until either your monitors are set correctly or until you have the desired amount of signal going to your effects processor or other outboard equipment.

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1 Answer

How do I fix channels with no sound


Mute Switch/Mute-Clip LED :
  • This switch mutes all Aux, Group and L/R sends from the corresponding channel.
  • This switch is equipped with a red LED that will illuminate when the channel is muted.
  • When the MUTE button is out,the LED functions as a Clip indicator that will illuminate at 2 dB below clipping.
  • Muting the channel does not prevent the PFL signal from being sent to the PFL/AFL mix when the PFL Switch (12) is in.
  • This switch mutes its respective Group send from the Group channel.
Go to page 11 in this link :
Peavey FX Mixer Series Operating Manual

You can also try, Restoring Factory Settings, in the Utility Menu Options.
Go to page 16 in ths link :
Peavey FX Mixer Series Operating Manual

CAUTION:
Restoring the factory settings option resets your mixer's presets, reformatting factory presets and erasing all other user presets. (This option is handy when your venue has permanently changed and all-new presets are required.)
Once confirmed, the presets are not retrievable and will be permanently lost.
Should you select this option in error, a warning screen allows you to cancel the procedure.

Sep 05, 2015 | Peavey 32fx USB 32 Channel Mixer

1 Answer

hi i have an Allen and Heath ZED 22 with no onboard effects. I would like to use an external Behringher unit but am having difficulty in connecting the processed signal back to the mixer. i would like to control the amount of effects individually per channel


Send audio from board via the "Aux1 Out" to the input of the effects unit. Now connect the output of the effects unit to "ST1" and control the amount of effects to each channel via each channels "Aux1" control. Adjust the Aux1 controls in the output stage (controls on the right side) for proper levels.

Older boards called this connection "effects send" for the output to the effect, and "effects return" for the effects out back to the board. The better choice was to use "effects send" into the effect but connect the effects output to an unused channel on the board. Using this scenario allowed EQ adjustments to be made before mixing it out to the amps and speakers.

Oct 01, 2013 | Peavey XR 8600D Powered Mixer

1 Answer

no sound


There can be any number of reasons for this problem - solve it diagnostically by starting with something that you know is working and work through systematically to the other end.
  1. Test a microphone on a separate amp to make sure it works okay. Check amp and speakers working. Check that all output cables from mixer to amp are working by testing separately.
  2. Plug microphone into a channel on mixer. Also plug in headphones and turn headphone volume control up.
  3. Make sure input sensitivity knob is turned up a bit (say half way) and main output faders (yellow) are up.
  4. Check that channel is turned on (little button just above the channel fader- needs to be pressed down)
  5. press pfl (pre-fade listen) button (next to button to switch channel on)- do you get any sound on main output or headphones or any indicator lights on mixer to show signal is getting that far (eitehr the individual channel metering lights or the main ones in the central section)?
  6. turn off pfl - make sure channel fader (slider) is up - normal position is ) - about 3/4 of way up. Check lights again on individual channel and main output section - any signs?
  7. Is the sub mix button for the channel pressed down - in which case you will need to bring sub mix (red) output faders up as well as main faders.
  8. If you have got signs of signal on the individual channel but not main see if the channel has been routed somewhere odd (like a subgroup of channels).
  9. Plug a working amp and speakers into one of the auxiliary outputs and use the relevant auxiliary send knob (on each channel just above the faders and pfl switches) to pan some signal to that auxiliary out - do you get anything? There is also a headphone socket for listening to the auxiliary channels (with a selector switch /knob to determine which one - make sure it is in the right position) try listening to the auxiliary output with headphones - anything? If yes the problem lies in the main output section.
  10. Check that there is not a jack plug in the insert socket (to route signal through an external effects unit) without a matching return jack being plugged in - if appropriate is relevant effects unit switched on and correctly set up - if unsure remove the insert plug to take it out of the system.
  11. Make sure any mute buttons are not switched in on main outputs.
You can download a full user manual here http://www.allen-heath.com/gl/gl2400

Feb 22, 2011 | Allen & Heath Allen and Heath GL2400-32...

1 Answer

where on a 16:2 allen heath wizard would you hook up a 482i sonic maximizer?


The answer all depends on what you want to achieve.
  • If you just want to enhance the sound of 1 or 2 instruments / voices you could take a signal out from an individual channel on your mixer using the direct out and insert jack sockets on that channel however this may make it difficult to control in conjunction with teh E.Q. controls on that channel as the Sonic Enhancer would be pre-fade and pre E.Q.
  • Alternatively you could send several mixer channels of your choice through the Sonic by using one of the sub-mix outputs to give a feed to the Sonic, returning it to the main mix either via a couple of spare channels, or the paired stereo inputs that are only routed to the main outputs.
  • Thirdly you could use one of the auxiliary sends to allocate different levels of signal from any number of channels to the Sonic. These are normally used to supply a separate mix to on-stage fold-back systems, monitors etc. Here I would use one of the 2 post fade ones rather than the pre-fade - to avoid negating what you have set on the main mixer e-q (tone controls)/. One advantage of this option is that it allows you to only enhance part of the signal from a particular channel and to allow part to bypass the Sonic without enhancement. I think that this would be my preferred option unless all the auxiliary feeds are needed for other purposes.
  • Lastly you could just put the Sonic on the main outputs of the mixer. This would mean that the same level of enhancement would be applied to the whole mix. As the Sonic Enhancer only has unbalanced (mono) jack sockets this later option does reduce the likelihood of you introducing unwanted radio interference to the system, compared to putting it at an earlier stage in the mix because, as the Sonic is unbalanced, everything else after it in the mix chain will also be unbalanced.


Feb 02, 2011 | Allen & Heath Allen and Heath WZ3144 14...

1 Answer

I have Mackie mixer cfx12 all the channels work except for channels 2 & 3, I turn the pre amp trim pot all the way up but no input is present, I also tried solo PFL for these two channels and no presents of audio? I have the board apart as I just replaced trim and fader pot on channel one. The ribbon cables is getting good contact from the main board to the expiation board for ch's 1-4, the connections from the input jack board to the eq board all solider joint are good. any suggestions?


I suspect one of the upfront IC amps has been damaged. This can happen if people power the mixer from a receptacle that is different from where other connected equipment is powered such as amp. For example, mixer is at one end of the hall and other inouts such as an output of a guitar amp is plugged in. If a ground fault or spike occurs, teh ground bounce can exceed the common mode voltage of the input amps.

In your case, the inpout amps are discrete transistor types.

A voltage surge into the inputs of your unit would LIKELY pop two bypass caps that are 330pf. For channel 2 these are C205 and C206. Check those for shorts.

VERIFY audio is available at the "send" (tip) of the channel insert connector... this verifies the preamp stage. You can PROBABLY plug a set of headphones in to check this... ONLY one side will have sound of course. Verify this is a good test by checking a working channel. The level will be quite low and we are looking for just some signal.

IF you do have signal on the channel insert send which is the "tip" of the channel insert with the trim turned up, let me know and I will check the schematic for the next thing to check farther down the line.

Sep 15, 2010 | Mackie 1604 Vlz3 16 Channel Mixer

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