No Trace - High V2 Value
Posted: Thu Apr 19, 2018 3:50 am
My last multimeeter was dodgy, and I thought my read outs were incorrect, but now that I have a new one I am very confused.
I couldn't find any any troubleshooting steps for V2, besides that someone had a malfunctioning U2.
My board came parcially assembled, which includes U2, so I have no doubt that it is functioning correctly.
I have resoldered and checked values R9/10/11/12, all correct.
The only thing that would make sense to me is that the feedback via R9 is too high, but the value is correct...
What could I be missing?
Thank you in advance.
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Measured with CPL set to GND
5V: 4.82V
3.3V: 3.3V
AV-: -5.01V
AV+: 5.00 V
V1: 0V
V2: 3.44V [2x Higher than normal]
V3: 3.58V
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I couldn't find any any troubleshooting steps for V2, besides that someone had a malfunctioning U2.
My board came parcially assembled, which includes U2, so I have no doubt that it is functioning correctly.
I have resoldered and checked values R9/10/11/12, all correct.
The only thing that would make sense to me is that the feedback via R9 is too high, but the value is correct...
What could I be missing?
Thank you in advance.
-------------------------------------------------
Measured with CPL set to GND
5V: 4.82V
3.3V: 3.3V
AV-: -5.01V
AV+: 5.00 V
V1: 0V
V2: 3.44V [2x Higher than normal]
V3: 3.58V
-------------------------------------------------