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Repairing PCB damage when surrounding components have been burned

Vesuvius

Aug 24, 2021
9
Joined
Aug 24, 2021
Messages
9
Good morning,
I have a PCB from a LCD television with a burned Mosfet that also toasted a few small SMD components around it to the point they are completely unidentifiable.

If the schematic is not available, how do you handle these situations? Guess or Mathematics or what?

Thanks
ONN_RokuTV_Burned_Mosfet.jpg
 

Martaine2005

May 12, 2015
4,293
Joined
May 12, 2015
Messages
4,293
Use some IPA (isopropyl alcohol) to thoroughly clean the area first.
You may then be able to identify the components.
Also look for reference designators on the PCB.
I doubt you’ll find a schematic as companies don’t hand them out, but it’s worth an internet search.

Martin
 
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