How to fix a blown channel on peavey xr 886 - Peavey Music

That is standard UK wiring.

Brown in Live.
Blue is Neutral / Return.
Green with Yellow stripe is Earth / Ground.

https://www.google.com/search?q=peavey+xr+1600d+wiring+diagram

Manual

https://peavey.com/manuals/80301359.pdf

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This will not be user serviceable. I suggest taking it to a Peavey authorized service center.

Out put amplifier is defective. If it was protected by a fuse - then look for a fuse that is blown.

headphone out put to 2 unused 1/4 in channel inputs,,

Check the caps in the PSU, these give out over time although not normally when used regularly. You may be lucky and be able to see one or more with bulging tops. If you can replace them and all MAY be OK. Whilst in there check for any visible signs of anything burnt or blown. If it looks too bad or there is nothing obvious it's a trip to the repair shop for certain.

The fuse is probably placed near the power cable entrance in the power amp.
Pick it up from it's placing dock and look for the wire inside. If the wire is whole, the fuze is fine, however, if the wire inside the fuze is missing or burned, the fuze needs to be replaced.

You would need to purchase a replacement fan (you can't repair broken ones). Most peavey mixers disassemble by removing the 2 screws that secure the top handle and then the six xcrews along the top and bottom of the back.

pfl or mute is engaged. You haven't routed it to the foh or speaker cables are naff, the cas are naff or even the main amp has blown.

That's easily done. Simply connect the left(or right) output of your mixer to one of the channels on the peavey. Use any line input. Since the peavey is a mono system, there's no need sending a stereo mix to it.

Sorry, but this unit does NOT support "bridged" mode. You will have to drive seperate speakers from the two seperate outputs. You would NOT get any more power if you could do bridged mode than you could with 4 ohm speakers on each of the two output channels.