Kustom KPM4080 schematic?

[drewl]

Anyone have a schematic for this cheesy 4 channel powered mixer?

Power is weak, driven by a TDA7294

But the AC input wiring is funky.

The white wire of the power cord is AC high, like the cord itself.

Black goes to the fuse, but the power trans is powered when it's plugged in.
The switch is after the PT.

I'll know if it's wired this way or if something is wrong when I rip it apart, just want to see what the schematic says.

Thanks.

[dmeek]

The power switch controls the standby/mute on the TDA7294

https://music-electronics-forum.com/...1&d=1576435341

[drewl]

That's what I thought.

Thanks.

[drewl]

Hmm, I guess having the PT powered on all the time caused it to start failing.

It hums like crazy when power out goes up, doesn't reach full power and the +/- rails start dropping.

Jumpered in a trans from a SS Fender, lower powered amp, and that was able to drive the Kustom to full power.