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Q&A

Comments on Arc-shaped cutouts around PCB mounting holes

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Arc-shaped cutouts around PCB mounting holes

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The PCB in question is the controller in a monitor (Samsung model U32H850UMN). I noticed arc-shaped cutouts around all mounting holes. The mounting screws are approximately M3 self-tapping for sheet metal.

Is the purpose of the cutouts to reduce mechanical stress from the screws to the part of the PCB with the SMT components ?

overall view of the controller board

close-up view of a mounting hole with an arc-shaped cutout around it

close-up view of a mounting hole with an arc-shaped cutout around it

History

1 comment thread

What are the bare circular holes for? (1 comment)
What are the bare circular holes for?
Olin Lathrop‭ wrote 11 months ago

I'm guessing you're right. They weren't confident that all the mounting surfaces would be in the same plane. I notice two normal circular holes in your top picture. They look like mounting holes. What are they used for?