5 Apr
2015
5 Apr
'15
5:48 p.m.
On 04/05/2015 04:40 PM, Robert Jarratt wrote:
I tested each FET using a component tester (Peak
DCA55)
and it appeared to show that they were all good. I believe
they are FETs because the XT-1140 schematic someone posted
shows FETs and the component tester also reported them as
FETs. I do wonder if one of them is only partially
working, I seem to remember that the one you point out as
having smooth ramp was indeed the one with the wobble. If
I have further trouble I will follow Tony's suggestion and
swap them around to see if the wobble moves, but detaching
them from the heat-sink looks to be difficult. Regards Rob
I'd just get some
FETs that are compatible (probably MUCH
better parts available today) and replace any suspect ones
with new units. Are these pop-riveted to the heat sink? I
vaguely remember a drive built like that.
Jon