Recovering from Overvoltage

Started by baffo32, August 13, 2020, 01:20:21 pm

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baffo32

Hi,

I have an unfortunate habit of plugging my teres into 12v supplies, which immediately burns the board out.

Does anybody know which components on the board will need to be replaced after this?

Thanks so much.

LubOlimex

You can look at the top left corner at the forth page of this document - it shows the power circuit around the power jack connector: https://github.com/OLIMEX/DIY-LAPTOP/blob/rel3/HARDWARE/A64-TERES/TERES-PCB1-A64-MAIN/Rev.C/TERES_PCB1-A64-MAIN_Rev.C.pdf

First try replacing D1 SMBJ6.0A. There is good chance this diode protected further damage. If replacing it doesn't work, then the AXP803 got damaged and the chances of repair are slim.

In future consider adding a protection fuse, where the suggested FUSE2 is placed in the schematic.
Technical support and documentation manager at Olimex