MC2100 RevB- I have aquired 3 of these boards (dang Proform) over time and now at a stage that all 3 have their own weird issues. I tried replacing MOSFET IR260N on two of the boards in hopes of fixing it, as I don't have a bench setup to diagnose exactly what could be the issue, I have switched the big fat cap between cards. Latest symptoms are following.
Card A - Original (works for a little bit specially if heatsink not grounded, if heatsink is grounded its a Scary - full speed Run Away), If heatsink is all tightened down its a run away off the bat. (has a good chance IMHO)
Card B- Worked the longest but now even after replacing the MOSFET a solid red led after and start doesn't do anything remains solid.
Card C - Works but is temperamental on speeds and such, so cannot have confidence specially with kids/mom as it could be dangerous. this is also the card on which there is and auxiliary power transformer on the board.
I am pretty handy and engineer by profession and have had my Kitchen Aid 48" running successfully over the years after a lot of capacitor/Relay changes on the mainboard, similarly have kept Samsung washer/Dryers functional, my carrier 5ton ac units running and proud of being the handyman I am credit to these forums. the idea is I can tinker at a decent level and have tools etc to go after it including a haako iron, but I am NOT an expert at reading circuits or knowledge of individual components function on the boards etc. I want to fix above one or all myself and need your expertise, if you can put me on a right path that would be awesome.
Alternatively I can donate a card (you pay shipping) to an expert who can make one of mine run effectively and you can build your PWM Circuit and digitally controlled sander or a lathe controller (came across those fantastic articles while researching my issue).
Sorry for a long post guys.
Card A - Original (works for a little bit specially if heatsink not grounded, if heatsink is grounded its a Scary - full speed Run Away), If heatsink is all tightened down its a run away off the bat. (has a good chance IMHO)
Card B- Worked the longest but now even after replacing the MOSFET a solid red led after and start doesn't do anything remains solid.
Card C - Works but is temperamental on speeds and such, so cannot have confidence specially with kids/mom as it could be dangerous. this is also the card on which there is and auxiliary power transformer on the board.
I am pretty handy and engineer by profession and have had my Kitchen Aid 48" running successfully over the years after a lot of capacitor/Relay changes on the mainboard, similarly have kept Samsung washer/Dryers functional, my carrier 5ton ac units running and proud of being the handyman I am credit to these forums. the idea is I can tinker at a decent level and have tools etc to go after it including a haako iron, but I am NOT an expert at reading circuits or knowledge of individual components function on the boards etc. I want to fix above one or all myself and need your expertise, if you can put me on a right path that would be awesome.
Alternatively I can donate a card (you pay shipping) to an expert who can make one of mine run effectively and you can build your PWM Circuit and digitally controlled sander or a lathe controller (came across those fantastic articles while researching my issue).
Sorry for a long post guys.
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