How do I remove a mixer output insert to replace it

Check the inserts and pan controls.

It sounds like you're new to 'professional' mixers. You would NEVER normally use an aux for effects. Any effects will normally be inserted in the sound chain using an insert. You have a pair of group inserts if you are wanting to apply an effect to the output (these are after the mix) and would typically be used for master de-essers or possibly compressor limiters or maybe even an equaliser, it would not be sensible to use an effect like a delay/reverb here.

I would have expected you to be using the group outs for the monitor mixes and am not sure what you may be using them for otherwise. If you used these you would free up 4 of the Aux outs for a 'multi channel' reverb/echos which you could take back into other channels and back into the main mix.

What is it you are tyring to achieve?

broken faders...bad muting fet on master buss, dirty insert jack on stereo buss...could be a lot of things, last drive stage to output, got hot neutral feedback on snake and blew the final stages...

Chances are you've blown the output transistors. Speakon connectors cannot short out but jack connectors can and if it was not inserted properly you'll have presented a dead short to your powered mixer. In any event it is really bad idea to connect anything when it's switched on. If you're really lucky replacing the output stage (which will probably be dead short on the transistors) and re-adjusting the bias should sort you out.

The compressor is a really good idea and should be connected between your mixer and your amplifiers. Your "integrated" mixer/amp is a bit tricky in that you will have to "insert" the compressor in the signal path.

If you have the "console" model....

1. "Main 1 Out" left and right to the input of your compressor and the output of the compressor connected to the "PWR Amp Insert."

2. What is known as Tip, Ring, Sleeve patch cable and plug connected ONLY to the "PWR Amp Insert." This type connection breaks out into a "Input" and "Output" using a single 1/4 stereo plug.

If you have the "square box with knobs on front" model

1. "Main Output" to input of comressor and compressor outputs to "Input to Main" (aka "AUX IN").

Check your owners manual for hookup details or suggestions and remember, all outputs feed inputs and all inputs feed outputs.

Sorry, I have looked at the schematics and the TAPE IN jacks are mixed into the MAIN outs AFTER the insert jacks, so your subs will NOT receive signal via the insert from the TAPE IN jacks.
You could make a small passive mixer merging the TAPE/CD before going to the crossover. This would require some non-standard cabling.... The other option is to run the CD into a regular stereo channel rather than the TAPE IN jacks... then the CD will go through the insert/crossover and to the subs as you desire. The last option is to use the crossover at the MAIN outputs instead of as an insert... which would be the CONVENTIONAL way... use BALANCED cables wherever possible.

You can use the compressor in two ways. 1st you can go inline from the main outputs into the compressor out of the compressor to the rest of the world using normal cables. You may also insert the compressor into the main inserts using a cable that is tip, ring, sleeve 1/4", to seperate 1/4" tip sleeve mono plugs. any more questions give us a call at the store 215-736-8055

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

If you're only using the keyboard, connect the keyboard output to the EQ input, and EQ output to your amp.

If you have multiple instruments and a mixer, run mixer output to EQ input, EQ output to amp.

More info, let me know.

Charlie

Probably time for an upgrade to a newer channel mixer. Your mixer is probably not worth fixing, but you could continue to use the mixer side for a while until you decide to upgrade that. If you happen to know an electronics tech, it could be a little project to check the power amp insert jack on channel B, but it wouldn't be worth spending good money after bad when you could put it towards more solid gear.

Good luck.

The dude.