Roomba 765 stuck - no error code - motherboard pb ?

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Roomba 765 stuck - no error code - motherboard pb ?

Postby dedius » September 28th, 2018, 6:20 am

Dear all,

I have a roomba 765 which have all 4 motors stucked (main brush, side brush, L/R wheels).
When I push the clean button, I get a low-pitched bip... and that's all.

Whith the built-in diagnostic, I tried to force the motors, and of course nothing moves. However, I get a number on the display (current ?), but I do not know how to use it...
I have checked that I had about 15V in different points (included what seems to be power transistor). I also have 5V on some points.
I would like to check transistor commands, but I do not succeed to locate them...
I am equipped to test and solder electronic components, but without a schematic I am stuck (like my roomba :) ).

Any suggestion or help warmly welcome !
Posts: 1
Joined: September 28th, 2018, 6:11 am

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