Help with Motor Control Board - ProForm treadmill

[bluto]

Re: Help with Motor Control Board

I would look over the power supply board carefully as well. I fixed one of these for my parents several years back. The one large filter cap on the power board was bulging. It caused two diodes to burn up and also burnt out one of the windings on the mains transformer. There was no fuse to protect against this situation and the burning silicon smell in the house with no apparent source really freaked my mom out. Replace that cap or leave the unit unplugged when not in use.

[keeney123]

Re: Help with Motor Control Board

Thanks for catching that. I made an correction, hard to make 100% correct when I do not have the board in front of me.

You're welcome. It is very easy to make a mistake even if the board was in front on a person. That is why it is important for each of us to look over things. Usually when I make a mistake it is so obvious a monkey could caught it, but I get so sure that I am blind to it, so I just tell the person who caughts me I just screwed up. BudM, thanks for the information that you provide it sure helps me to understand things.

[Crrose]

Re: Help with Motor Control Board

Mistakes? How about soldering the cap wires to the rectifier leg by mistake and giving you false meter reading expecting help, or checking things in diode mode when they should have been done in Ohm setting confusing everyone? I am glad you have all hung in to continue to help me and not just throw your hands up and move onto another forum question.

[SteveNielsen]

Re: Help with Motor Control Board

If you are willing to stick to finding a problem there's always people here willing to help. If you stop making mistakes maybe you've stopped learning

[budm]

Re: Help with Motor Control Board

BTW, you should check and see what pin 2 (input pin) of the MOSFET driver IC TC1410 goes to.

[Crrose]

Re: Help with Motor Control Board

As far as I can see pin 2 is connected to pin 3 and the orange 3 prong capacitor?

[budm]

Re: Help with Motor Control Board

https://www.badcaps.net/forum/attach...4&d=1421039122

"As far as I can see pin 2 is connected to pin 3 and the orange 3 prong capacitor?" I think you look at the pins wrong, the dimple at the bottom left of the IC is pin 1 (make sure you put the new IC in correctly).
I see pin 2 is connected to the SMD resistor with '285' printed on top, another end of the resistor is connected to pin 4 which is the Ground pin of the IC.

[Crrose]

Re: Help with Motor Control Board

Ok so the dimple is pin one, I was going off the data sheet that showed pin 1 diadonally on opposite corner by the way the numbers were on the chip, I see now a black dot I guess represents the dimple. Again another learning mistake by me.

Yea pin 2 goes to 562 chip and under C5 to R19

[keeney123]

Re: Help with Motor Control Board

Ok so the dimple is pin one, I was going off the data sheet that showed pin 1 diadonally on opposite corner by the way the numbers were on the chip, I see now a black dot I guess represents the dimple. Again another learning mistake by me.

Yea pin 2 goes to 562 chip and under C5 to R19

That 562 chip is a resistor that is 5.6 KOhms that is a SMD( surface mount device), just for reference purposes.

[Crrose]

Re: Help with Motor Control Board

Thanks for the last info, nice to learn as much as possible. Can someone tell me what that one 3 leg mosfet is. Says Morocco ST 9540 427654 W33B20, when I call order no one says they can find it by those numbers. I can't find on Internet either.

[budm]

Re: Help with Motor Control Board

Can you take good pictures of the MOSFET?

[Crrose]

Re: Help with Motor Control Board

Here you go.

[Crrose]

Re: Help with Motor Control Board

This is the 2 prong one next to it.

[budm]

Re: Help with Motor Control Board

This is the 2 prong one next to it.

This one is a Diode.

[budm]

Re: Help with Motor Control Board

Well, I am glad I asked for picture because in post 230 you have the numbers as 'W33B20' that is why I could not find any info on it.
The actual numbers as printed on the body is W33N20, so it is 'STW33N20'

http://www.mouser.com/ProductDetail/...pYC6krShfGCA==

[goontron]

Re: Help with Motor Control Board

datasheet anybody?

[Crrose]

Re: Help with Motor Control Board

Sorry that was a typo, I had it correct in post #26 though, at least I got something right. Will try to order this somewhere.

[Crrose]

Re: Help with Motor Control Board

Ordered parts now waiting for arival.

[selldoor]

Re: Help with Motor Control Board

Maybe worth reading up on Dim Bulb Tester might save blowing any new parts

[Crrose]

Re: Help with Motor Control Board

Still waiting for parts to arrive watching videos on how to remove and solder the small SMD.