Fender Rumble - what's this thingy?

ThisIsWeird

Curious as to what this item is - it seems to be between the PSU and power amp sections of this PCB.

It looks like a metal cover, and underneath there's a solid block which screws to the metal casing, so presume it's a heatsink of some sort? I don't intend to remove that top screw - just in case :-)

Cheers.

cerebus

Remove the screws and have a butchers , screws are designed to be removed.

Saying the underside looks to be missing a screw and appears to have the wrong screw fitted too 

It certainly appears to be some sort of heat sink 

ThisIsWeird

There was only one screw in the underside, and it's correct 'cos it came through the outside casing and was countersunk.

Scared to remove cover :-(

cerebus

Ah ok looked wrong from the picture

Sometimes you have to live a little!

ThisIsWeird

Just concerned in case it's 'glued' underneath, or covered in heat paste. I'll wait until I completely destroy the PCB first... :-(

Rodders53

PCB print says D312 to D314 so four (surface mount) Rectifier Diodes for the DC power supply I imagine.

Don't remove the screw in case it does mess up the thermal conductivity of a working unit and you'd need to get new ones when they get too hot.

ThisIsWeird

Thanks for that, Rodders.

Interesting it has a further set of rect diodes in addition to the main unit.

Yup, I won't be touching it!

The amp is in otherwise immaculate condition, so best to pass it on to someone who can fix it - without me making it worse....