Amp cutting out.

[kendall]

Hi there I have a Laney combo which has worked fine for years. Lately its taken to just not making any sounds. If I leave it for 5 minutes, I switch it back on and all is good for a while. I use it most days for about 30 - 60 mins, and this happens randomly every couple of weeks.

Any ideas?

[paul_5]

Thermal trip or dry joint? I had a digital piano that did this - it was the speaker protection relay that had gone, so whilst everything powered up there wasn't any output.

[chris_b]

That's God's way of telling you that you need a better amp.

It's also the reason I don't like combo's. When one part fails you can't use the other part.

I'd take it to a tec, get it working, then replace it.

[kendall]

[quote name='chris_b' timestamp='1422872903' post='2677660']
That's God's way of telling you that you need a better amp.

It's also the reason I don't like combo's. When one part fails you can't use the other part.

I'd take it to a tec, get it working, then replace it.
[/quote]

Thanks for the replies chaps. I've now got a good excuse to look for a new toy! Not a combo I hasten to add.

[Count Bassy]

Sounds like a dry joint to me. Probably an easy fix. Could be anywhere, but I'd look around heat generating devices first, eg rectifiers, power resistors.

[kendall]

Took amp out of cabinet this morning, pushed a few wires randomly, found one that was loose. Reconnected it - job's a goodun!

Almost disappointed as have been looking at new amps........

[rmorris]

Was it a wire into a connector or straight into a pcb ?

[kendall]

[quote name='rmorris' timestamp='1423334749' post='2683709']
Was it a wire into a connector or straight into a pcb ?
[/quote]

Into the PCB (I think) the green plastic thingy right?

[Grangur]

PCB : Printed Circuit Board

I had a similar problem with a MarkBass amp. Mine was a poor Speakon socket. Any poor connection can cause heat, which will cause the thermal cut_out to do its job.

Pleased you sorted it.

[kendall]

[quote name='Grangur' timestamp='1423381033' post='2684035']
PCB : Printed Circuit Board

[/quote]

Aha - so that's what it stood for! Thanks. Continually learning.

Yeah the heat thing makes sense, it worked then cut out. Have so far hammered it for a few hours straight and all's still good.

Cheers to all.