Circuit Board Voltage issue

[Emoreigns]

Doing the driver testing for the boards. The A socket, D socket, and 46U tested fine, but 32 had no reading whatsoever?

Trying to deduce if this is a problem on the board or elsewhere. Appreciate the help as always everyone.

 

[Paul Birkeland]

What does no reading mean though? Is it 0V?

The simplest problem that will lead to super low voltage at that terminal is if you swap the R1 and the 33K resistor next to it on the B side of that board.

 

[Emoreigns]

Yepp reading .001 V. Those two look the same as the other side of the board which is reading right?

 

[Paul Birkeland]

The solder joints on those resistors haven't gotten enough heat to flow out.

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[Emoreigns]

I heated up all the joints and flowed some more solder. I'm still having the same reading. Might just be a skill issue lol.

The voltage readings on both of these resistors are the same as the 'correct' ones on the sister board, so it it seems like power is flowing?

Thanks Paul

 

[Jameson]

Post some photos of the board. Close up and clear as you can.

Having just spent a week troubleshooting an issue that ultimately boiled down to me missing a joint that needed more heat, I can promise you it’s worth taking the time to go over those solder points slowly, methodically, and with a hot iron before doing anything else.

My biggest issue on PCBs normally ends up being spots without enough solder or transistors without enough heat.