Hi All.

looking in to diagnosing the fault on the MC2100ELS-50W-V1 within our NordicTrack running machine and repairing. Switched on recently after a long time off and an audible fizz/pop from the controller board area plus a burning electrical smell so that’s why I’m starting there. This was when powering the machine up, not attempting to start a run.

I’ve started very basic fault finding and 240v is making it from the switch in to and out of the motor and to the controller.

I have a multi meter and soldering equipment and am keen to learn but also appreciate there is a lot of the basics in knowledge I do not have. I know I don’t know a lot. I also don’t know what I don’t know

That said keen to roll up my sleeves and learn more, even if it’s to check some basics that will then help me understand whether it’s within my reach to repair, needs sending to someone who can, or just needs the entire board swapped out (don’t want to be wasteful needlessly).

Here’s what I’ve observed so far.

1. 240v is reaching the controller board
2. The Red LED status light on the board which I believe normally blinks or stays on is permanently off and doesn’t light up at any point of powering up.
3. There looks to be a popped resistor on R3 (attached picture)

I’ve not progressed further than this yet and am looking for recommendations on what to look in to further. I’m guessing there are a number of parts on the AC to DC conversion part of the board that would be the first place to look?

Any advice appreciated - Thanks in advance. Phil

 

There is a reverse-engineered shematic in a past post search that covers a couple opf the few versions of the MC2100 boards.
But usually the main culprits are the semi's attached to the aluminum heat sink, it pays to check these first.
If you are getting HV DC then the 4 pin bridge rect is probablly OK. !

 

Thanks MaxHeadRoom.

I’ve pulled the board from machine to get a closer look at it. I’ll have a look in past threads but the schematics I found when I looked seem to be different versions/layouts. Have you seen one for this version?

I’ll look again. Let the fun begin

Phil.

There is a reverse-engineered shematic in a past post search that covers a couple opf the few versions of the MC2100 boards.
But usually the main culprits are the semi's attached to the aluminum heat sink, it pays to check these first.
If you are getting HV DC then the 4 pin bridge rect is probablly OK. !

 

I would check the large semi's mounted to the Alum frame, they are ususlly a power diode and Mosfet for the motor and a SCR for the elevate.
Check the LV DC, usually 12vdc, Bench testing is a little easier with a PWM signal into Pin 4 of HD2.