Peavey XR886 mixer amp

I'm having a little difficulty translating that, but many of these type of units, including this one, are switchable so that it behaves either normally as a Stereo amplifier, or can be switched to one power amp being fed a Mono mix from the main Stereo Bus, and the other power amp running a Monitor Send, so the act can have a Monitor on stage as well as a (Mono) PA system.

There should be a switch somewhere that does this, probably marked Main/Monitor or something.

Gareth.

main

normally

Mono

system.

Its annoying the easily overlooked significance of the "o" and "." distingushing mono (monophonic) from mon. (monitor), why not fold. instead of mon. .

Looks as though its diverter switch problems on axial type 1/4 inch pcb mount sockets. Oddly both failing at the same time , perhaps someone tripped over leads, but even then ,both failing together seems odd. Physically jumpering master L line-out to PA-in L, and same for the right brought normal operation. Since plugging in jacks, Left diverter is now working as default structure of master to PA and the other one still erroneous. So looks as though I can leave the mixer intact and just replace the back board patching sockets.

Not so simple. The sw on these sockets are not used, sensing must be via the ring contacts and analogue switches or relays . I suspect the owner could tolerate a pair of patch leads jumpering master outputs to PA-in

IIRC there is a model of PV pa amp which requires a short jumper lead between two of the front panel jacks to link the two channels.

Ron

the

master

For the moment I'm going with a bad PA-in bypass switch , so replacing both

1/4 inch sockets and bad solder on a jumper that carries signals to 3 of the 4 control lines of a MAX364 quad an. sw IC. If its a problem involving the recessed L/R // L+R/Mon1 mode switch then it can stay there and as owner does not use monitor outputs, he will have to use a pair of jumpers on the rear.

In my experience, mixer desks are a black art in terms of use, even if you think you understand the principles and functions of the myriad cryptically-marked switches and signal routing options. I have spent hours trying to get back to a situation that I knew worked ok before I pressed a few buttons ...

A couple of weeks back, I fixed a powered mixer for one of the shops I do work for. It was a straightforward output problem, but when I had it all back together, try as I might, I could not get it to a state where a signal going in on a channel, would arrive at the output sockets, controlled by the master faders, and making the main bargraphs dance prettily. Eventually, I gave up, and returned it to the shop owner - who can 'play' these mixer desks like a piano - informing him that I was sure its original problem was fixed, but that I couldn't drive it properly, and he would need to give it a final check. He rang me a couple of hours later and said yes - it was all ok. When I asked him what I'd done wrong, this stream of stuff that sounded a bit like "you hadn't got the oogleflump matrix diverter routed through the group one A / B monitor bypass fiddlety-drack osmosifying control, resulting in all signals disappearing down the backline monitor channel's plug-hole simulator". Oh, said I. I'll know next time then ...

Arfa

I'm not surprised that even an intelligent person such as yourself has had problems setting up mixers.

Some years back I tried to get Mackie to hire me to re-do their mixer manuals. They tended to drop the reader "in media res", without providing a step-by-step "slow build" that explains the basic features, then shows how they're assembled into practical mixing "solutions".