Ashton Amp Repair Advice.

[Sonic Mountain]

Thanks guys...

I'm not an amp guy, and there was brief comment on safety from BigDaddy, but no one has specifically mentioned discharging each of the electrolytic caps in there before carrying out any trouble shooting & repair.

I hope you've done this Sonic.

Haven't done anything more than turn it on and look for signs of life and have a look at the fuses. It came pre-dissasembled. I will have a look at doing this though - just had a bit of a read and seems important for Tube amps.. not sure on this, there don't appear to be any large capacitors, but better safe than sorry. Definitely a case of me knowing just enough to be dangerous

No sound no lights indicates no power do the heaters light up

The diodes are just downstream from the standby switch in the circuit you linked and if you say there's no standby switch then it's not the same circuit and the cap on the power switch will be there to reduce arcing when the switch is thrown

Marcel will almost certainly provide more info

Not sure how to identify 'heaters'? It's a solid state amp, not sure if that makes a difference.

Could well be the wrong diagram. I'll see what else I can find.

EDIT: Ah yes, I'm a dummy. That diagram is for a Valve amp. This one is definitely solid state.

[dave.king1]

EDIT: Ah yes, I'm a dummy. That diagram is for a Valve amp. This one is definitely solid state.

Yep that was my thinking, the diagram was a hybrid beast so not valid

The user Valvehead in this post appears to have the Ashton schematics or at least some of them

https://www.guitargear.net.au/discus...?topic=40901.0

Ashton themselves may help

http://ashtonmusic.com/contact-2