PCB:
2060-771668-000 REV P1

This is a known good working board.

I have a question regarding the Q2 MOSFET. Where is the "source" 3.5V generated from? Is it coming from the SMOOTH controller or another part of the PCB?
The 4 "drain" pins are all 1.2V and I suspect they are step downs to Vcore.

I ask because, on 2 boards that are malfunctioning, the source voltage is always lower than 3.5V, so who is making 3.5Volts?. Thanks!

Without much checking, i think that should be 3.3 and it should come from another buck converter... but hey, isn't it possible to track it?
pepe

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