RD54 Stopped Spinning

Jarratt RMA robert.jarratt at ntlworld.com
Tue Apr 7 14:37:19 CDT 2015

Thanks Andrea. This is always something to look out for. However, in this
case, looking at the XT-1140 schematic that was posted earlier in this
thread, there do not seem to be any capacitors in this area.

I have ordered some replacement transistors and I will try them on another
drive first.



On 7 April 2015 at 07:20, shadoooo <shadoooo at gmail.com> wrote:

> Hello,
> apart from the transistors, I would check for some bad capacitor.
> The analog part with the sensors needs quite clean supply to work good,
> while the motor itself is a big source of spikes and pulses.
> Possibly there could be some supply filter, with electrolytic capacitors
> not working as expected due to age... or with excessive current leakage.
> Andrea

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