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Digitech Whammy IV overheating issue - HELP?
Components in my Whammy are overheating and I don't really know what I'm doing. Apologies if I'm in the wrong area or just generally ill informed - I'm just trying to figure out a solution to what seems like a solvable problem.
When I turn on my Whammy (using recalibration mode - ie holding down the footswitch as I plug it in) it will work perfectly for a few minutes. Then it will blink off and become unresponsive. If I reset again, it will work again, but then die again but faster. To me, with very little knowledge in the area, it implies that the more computery elements are intact, but the issue is probably to do with overheating (given the accelerated fail time on subsequent attempts)
Having searched various forums, I came across a few possibilities, which I checked.
(1) Check for shorting against the casing: this doesn't appear to be happening - still happens when the circuit board is separated from the casing, and the interior of the casing has been covered in duct tape, I'm guessing cos digitech were aware of that potential issue.
(2) Check if any of the three 1000uF 16v capacitors are swollen - to my eye it does appear that there is some damage to the top of the C3 capacitor, but it's not swollen and there's no spillage (see attached images). Having said that, can someone who knows anything about this confirm whether this might be the issue/part of the issue?
(3) When it dies, check for overheating elements - whenever it dies the U1 and U2 elements are very hot. Does anyone know if this means it's an issue with those elements specifically or if that issue could be stemming from something else, for example the potential issue with the C3 capacitor.
Apologies if this is all really obvious stuff, or if I'm using the wrong terminology - I'm just trying to solve a problem and am appreciative of any and all expertise you can throw my way.
Noel
When I turn on my Whammy (using recalibration mode - ie holding down the footswitch as I plug it in) it will work perfectly for a few minutes. Then it will blink off and become unresponsive. If I reset again, it will work again, but then die again but faster. To me, with very little knowledge in the area, it implies that the more computery elements are intact, but the issue is probably to do with overheating (given the accelerated fail time on subsequent attempts)
Having searched various forums, I came across a few possibilities, which I checked.
(1) Check for shorting against the casing: this doesn't appear to be happening - still happens when the circuit board is separated from the casing, and the interior of the casing has been covered in duct tape, I'm guessing cos digitech were aware of that potential issue.
(2) Check if any of the three 1000uF 16v capacitors are swollen - to my eye it does appear that there is some damage to the top of the C3 capacitor, but it's not swollen and there's no spillage (see attached images). Having said that, can someone who knows anything about this confirm whether this might be the issue/part of the issue?
(3) When it dies, check for overheating elements - whenever it dies the U1 and U2 elements are very hot. Does anyone know if this means it's an issue with those elements specifically or if that issue could be stemming from something else, for example the potential issue with the C3 capacitor.
Apologies if this is all really obvious stuff, or if I'm using the wrong terminology - I'm just trying to solve a problem and am appreciative of any and all expertise you can throw my way.
Noel
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