Hantarex Polo Sparking at R232

[jjhudgins]

Sparking at r232 near the FB.

 

[Arcade2007]

The PCB material has carbonized and there is now a conductive path for the high voltage. Hopefully, you have access to a microscope, or good magnifier, in which case you can carefully scrape away the carbon with an xacto knife or other small instrument. Try to remove as much carbon as possible. You need to expose virgin substrate - while also avoiding removal of too much board material. That's a deep gouge and removing all the carbon is going to take some time and patience.

I would also recommend carefully trimming / scraping away some of the copper comprising the large trace - to provide a larger gap between the resistor's solder pad and the adjacent edge where it has been arcing.

Once you have removed as much carbon as possible, and trimmed back the adjacent large trace, carefully fill the gap with an insulating material (I use a cyanoacrylate like Super Glue). Apply carefully and sparingly from the tip of a toothpick, or even a sewing needle if necessary - to fill the void and restore some of the dielectric strength to the area.

Be careful and take your time - and make sure you don't get the super glue on the solder pad - such that you cannot solder the resistor lead effectively.

 

[jjhudgins]

Wow. Thank for the info.

 

[jjhudgins]

Ill
check
It out today