On 05/11/2013 16:24, Nelson wrote:
On Tue, 5 Nov 2013 09:37:01 -0500, N_Cook wrote
(in article ):

Main control is some custom uC

You can sometimes find salvaged/repair parts on the net. I have a
Precor Elliptical Trainer with similar problems. The custom IC's are
hard to get around especially with no schematics. Good luck.

I am toying with the idea of building my own replacement controller
using a Raspberry Pi or Arduino. I'm thinking I can work backward from
the discrete components and perhaps build an even better controller.
But it's no quick fix


removed the powerFET and solid 25 ohm gate to s/d , tried a lower rating
one but the driving sense amplier may have been knocked out, other than
14V supply to it, no further forward, at least referenced to 0V so
scopeable , but I suspect the uC has "fingers" in all directions