EA iAmp Doubler power module replacement

[pete.young]

My Euphonic Audio iAmp Doubler died silently at rehearsal a couple of days ago. Lights carried on working but there was no sound. The amp wasn't particularly stressed at the time, running at about 10 o'Clock on the Master.

 

I'm pretty sure that it's the power module that has failed. If I take a line from the effects send into the effects return of another amp, it works fine and I can hear a difference in sound with the mute switch engaged (total silence or a slight hissing when not muted).

 

The power module is an ICEpower 250ASX2. I'm assuming that there are no serviceable/replaceable parts in this module, and that replacement is the best option.  It appears that it's a straightforward case of disconnecting the old module, removing the screws and swapping the new one in. Does anyone know if any additional configuration is required? There don't appear to be any jumpers on the board.

 

There is a slight complication: there is what looks like a thermal sensor attached to the power amp heat sink, which connects to the fan control circuit. I'm assuming I can either re-use this sensor or replace it. Can anyone suggest a suitable adhesive for this application? It's also an option to just wire the fan so it runs all the time, but I don't think I've ever heard it running in normal operation.

[Chienmortbb]

Before you do anything make sure it is the power module. The fact that the MUTE button mutes the hiss suggests that the failure is not there but elsewhere. Those modules are not especially noisy on their own. 
 

Before the module there will be a preamp and a balancing circuit as the 250ASX2 is it is two amplifiers working in bridge or anti-phase. 

[pete.young]

I don't have a schematic for the amp, but the data sheet for the power module does identify the inputs. Is it reasonable to assume that, provided I have a voltage on the connector that carries the input to the board, that everything upstream of the power amp is working as it should?