820-02020 // 5V 0.1 - 0.3A //

[quasimodo]

Hey guys,

liquid damage.


PPBUS_AON: 12.33V unstable

Diode mode reading of PP5V_S2 0.032. Cant find a short.

PP1V8: 1.8V stable.

Every other main voltage is unstable.

Corrosion around UC300. Removed Caps and chip. Same Diode mode reading of PP5V_S2.



What to do?

 

[2informaticos]

0.032 reading is really bad.
Probably nothing get hot injecting voltage.
But a good thermal camera may help you.
Don't inject more than 6V there; as always, start with just 1V.