Reply To: Voltage is off on Q1

#4686
brach
Participant

Have you re-flowed all the joints on Q1 (and the rest of the board for good measure)? Are pins 2 and 3 shorted?…what’s the resistance across them? If R1 is measuring 3.3M ohms, then it seems like pins 2 and 3 are shorted…either by a solder short or internally. If it seems like it’s an internal short then remove Q1 from the pcb and measure across pins 2 and 3 with an ohm meter. From my experience, this type of problem is usually an assembly issue.
Keep me posted.
Good luck.
-Brach