@@bixy9347 The Rigol is great, I tested its resistance accuracy using my BK Precision LCR meter. The Rigol showed 11mΩ's on a transformer coil I was testing, and the 4 wire LCR meter showed the same! I have the Keysight 4 channel scope, but in general I think they are overpriced, they do have a lot of features, but so does the competition.
Interesting. I am wanting to learn more about repair if appliance control boards. They can be expensive to buy “refurbished”. This is especially true when you consider many times it is just a capacitor or relay of some sort that can be replaced for a very few dollars and some know how. Btw, I like the tool you used to remove the relays. No desoldering and leaves nice holes for the new capacitors. Does it twist the leads out?
Seems to me that the the mosfet shorting out and the power supply cycling would be the culprit in taking out the capacitors. The rapid discharging of the caps through the short circuit causing high current in the capacitor and causing them to short internally. The short circuit was quite some distance (through the board traces) from the power supply, so it would appear to the power supply not as a direct short, but as a very low ohm resistor as a load. Trying to drive that load took the caps out.
Great video, would really love to see that short finding process 😉
That's a video I will be getting out sometime soon.
Awesome! You use a Rigol bench meter, would you recommend it? I would love a Keysight but afford it 😝
@@bixy9347 The Rigol is great, I tested its resistance accuracy using my BK Precision LCR meter. The Rigol showed 11mΩ's on a transformer coil I was testing, and the 4 wire LCR meter showed the same! I have the Keysight 4 channel scope, but in general I think they are overpriced, they do have a lot of features, but so does the competition.
@@bixy9347 Are you on the Re-Engineers Facebook group?
I just applied to join 😎
Interesting. I am wanting to learn more about repair if appliance control boards. They can be expensive to buy “refurbished”. This is especially true when you consider many times it is just a capacitor or relay of some sort that can be replaced for a very few dollars and some know how.
Btw, I like the tool you used to remove the relays. No desoldering and leaves nice holes for the new capacitors. Does it twist the leads out?
Join the Re-Engineers on Facebook, it's geared towards board repair for appliance techs.
I’m gonna join now
I saw in the fb site you use no the desolder tool to heat and suck the solder. Neat
I was really impressed how it left the holes clear to put new parts in.
Great video mike! Do you think the failing capacitors took out/contributed to the death of the dual mosfet IC?
Seems to me that the the mosfet shorting out and the power supply cycling would be the culprit in taking out the capacitors. The rapid discharging of the caps through the short circuit causing high current in the capacitor and causing them to short internally. The short circuit was quite some distance (through the board traces) from the power supply, so it would appear to the power supply not as a direct short, but as a very low ohm resistor as a load. Trying to drive that load took the caps out.
My monitor's brightness is always full even when i adjust it to 0 by buttons is this caused by mosfet?
It seems you were in a hurry to finish off the video? Would like to have seen how and where you tested the circuit once the components were replaced.