No output on the master but there are output on group and aus out

This unit will require an amp. I have set up several mixers and I
do not watch output level numbers, you can get desired volume using amp. It does no good to drive input levels high output levels high and the turn down amp. Lower your inputs so no light flashes set master gain to -6 output and then raise amp volume. I have set up 16 mic mixer set individual levels and the feed to main mixer and controlled levels with one fader. I have taken mixes from main mixer to another mixer to control audio on video feed. A good band does not let member's set their levels . the audio person set levels, bad bands have members to set own level with resultant a mess that gets louder and produces sub par event. Remember good bands sound good and bad bands only sound louder, and bad

1. Check the Headphone Output:
   • Make sure that the headphone output jack is clean and free of any debris. Sometimes, dirt or dust can accumulate and affect the signal.
2. Output Mode:
   • Double-check the output mode settings on your Boss BR 1180. There might be a setting that affects the stereo output, so ensure that it is set correctly.
3. Output Routing:
   • Verify that the output routing settings are correct. Check if there's a setting that might be causing the output to be directed to only one side.
4. Master Output:
   • Check the master output settings to ensure they are balanced. If there's an imbalance in the master output settings, it could affect the stereo playback.
5. Factory Reset:
   • Consider performing a factory reset on your Boss BR 1180. This can often resolve software-related issues that might be causing the playback problem.
6. External Monitor:
   • If possible, connect the recorder to an external speaker or monitor system using the appropriate outputs to see if the issue persists.
7. Contact Support:
   • If none of the above steps resolves the issue, it might be a hardware problem within the unit. You might need to contact Boss support or a professional technician for further assistance or repairs.

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?

send a signal thru the sub 4 insert and see if it comes out the sub 4 output. You may have jarred a ribbon cable loose in transport.

I presume you mean there is no output on the main out. Is there output on the groups etc? Have you checked all the routings? What else works / doesn't work?

If you aren't using one of the group outs you could re-route the main L/R through one of them. I can't remember if that board will let you configure the MONITOR outs for either PRE/POST fader but if so you could go that route too.

Otherwise that fader is most likely dead & you'll probably have to replace the MAIN L/R, master output module if you can't find a competent tech to fix just the fader.

From page 84 of your user manual, the signal flow diagram shows that the two effects busses can be sent to the sub busses. You CANNOT send the subs through the effects unit since that would loop... so the effects that are selected from the channels onto the two FX busses which are then processed into the effects signals, then can be ADDED into the sub group signals. Make sure the subs are NOT selected to the mains and the solo of the subs is not set Nor is the sub mutes. You say the subs are showing signal... MAKE SURE THIS IS with the indicators set to display "Output" as that is the one that counts.. If the output when the sub is selected shows no signal, then likely the mute for the sub has gotten set.

You must have aux sends on each individual channel and each AUX MASTER turned up for output and each of those outputs must be going to separate amps.

I assume you swapped thee output leads as well as the inputs which you di mention, to verify you amps and cables...
The Vestax schematic I have is NOT your same model, but the companies often re-use circuitry. In the schematic I have it appears that the two channels go through two levels of NJM2068L op amps.
In these two levels there is both a master gain control. It is important to know whether the gain control varies the output level of the right, even if it is low. Also in this gain control area is a master balance pot which varies the ratio of the left and right and is CAPABLE of taking either channel to near zero output... IF you have that control check it for sure !!! The pot is a dual employing both an A taper and C taper which is a reverse of the A.
The right tool for troubleshooting this is an oscilloscope, but first an inspection looking for board cracks around the output and pot area is in order.

Go to www.korgpa.com/pa_root/pdf/pa800/Pa800-200UM-ENG.pdf.Page 226 has the audio output section.Page 19 has the rear panel explanation. Left/Right: These are the main stereo outputs. Use them to send the final stereo mix to an external device. Connect either to get a mono output. Set the output level with the Master Volume slider. 1/1: These are the sub outputs. Use these to create a stereo submix of just some tracks or to output just a single instrument to be mixed alone or to be processed or amplified externally. Not: the Master Volume slider has no effect on these outputs. Signal is sent dry with no effects applied. Hope this helps.