It's a fuse.
The diode to its left is also gone.
It hazard a guess there's more damage further down the line too.
The diode to its left is also gone.
It hazard a guess there's more damage further down the line too.
Thanks! Good eyes!!!!!
I’m hopefully that there isn’t too much more damage because the board is just at the power input and is connected by a ribbon cable to the rest of the power supply. Here’s a pic of the board from above with the diodes on the right…just visible through the wires.
I’m hopefully that there isn’t too much more damage because the board is just at the power input and is connected by a ribbon cable to the rest of the power supply. Here’s a pic of the board from above with the diodes on the right…just visible through the wires.
Attachments
If the fuse went there was a reason. Often times some other component shorted out down the line. Look for more blown up parts in the rest of the circuit.
It looks more like a dead thermistor to me, rather than a dead fuse.
I have seen many dead inrush limiting thermistors, used to limit current as the capacitor bank charges up, they fail eventually because they are designed to run hot.
They fail when rectifiers or transistors short out, too.
Now you have a choice between an NTC inrush limiting thermistor, which is most likely, and a PTC overcurrent limiting thermistor, which is less likely.
You need to do a bit of reverse-engineering to work out a suitable substitute.
I have seen many dead inrush limiting thermistors, used to limit current as the capacitor bank charges up, they fail eventually because they are designed to run hot.
They fail when rectifiers or transistors short out, too.
Now you have a choice between an NTC inrush limiting thermistor, which is most likely, and a PTC overcurrent limiting thermistor, which is less likely.
You need to do a bit of reverse-engineering to work out a suitable substitute.
Do you have a multimeter to help trace where the fuse goes? To the 12v trigger sockets?
It would seem to be a PTC thermistor if there are no bus caps involved, they work like a resettable fuse, just give it time to cool.
Makes me wonder how it burnt like that, what happened? Does it work without that fuse?
It would seem to be a PTC thermistor if there are no bus caps involved, they work like a resettable fuse, just give it time to cool.
Makes me wonder how it burnt like that, what happened? Does it work without that fuse?
I’ve never used the triggers, but recently had a problem when I unmuted the preamp and the volume went straight to full output. Haven’t been able to replicate that issue, but found this damage. No other obvious signs of distress and the preamp seems to be working fine.