Re: Help with Motor Control Board

Sorry for the double post. Here are some pictures from my repair so far.

I used a Hakko FX-888D soldering station set to 360C with a sizeable tip. Pick up some desoldering braid/wick, I used 2.5mm wide solder wick. You should also get some flux to help the solder flow into the wick and generally make things easier, I recommend Chipquik SMD291.

The traces are pretty fried, desolder the components carefully because you can easily rip the overheated traces off the board or damage the through holes.

The 1K...

Re: Help with Motor Control Board



I am fixing this board for my sister's treadmill at the moment. The same issue -- the motor controller board got a bit toasty in this area.

My board revision is a bit different -- instead of one 24V zener there are two 12V zeners in series with the reference designators DZ4A and DZ4B. They must have gotten a good deal on 12V zeners...

Anyways, based on my teardown and repair, the components above map to:[LIST][*]DZ4 = 1x 24v 5W zener diode[*]DZ1 = 1x 15v 1.3W zener diode[*]D11 = 1x 1N4007 rectifier...