# Can I resolder an insulated solder joint?

#### rambomhtri

Joined Nov 9, 2015
317
I'm fixing my electric tooth brush, and I think there's an insulating layer all over the IC.

Can I apply heat to one joint and use the solder it's there?
Notice it's a personal tooth brush, it hasn't to be a professional job.

I don't know if the solder and the insulating layer will mix up and then the whole solder is not a conductor anymore...

Thanks!

#### Alec_t

Joined Sep 17, 2013
10,712
It would be best to scrape the layer (conformal coating) carefully away from the immediate area/joint you need to solder.

Dammit, Braun, you guys really don't want "expert" customers to replace your dead rechargeable batteries. It's was way too complicated to replace just a rechargeable battery, lol (I did it though). If I had taken the electric tooth brush to a repair electronic shop and tell them to replace the dead battery, man, it would have been like $50 or more. And a new electrical tooth brush costs less than$30.