Electronics > Repair
BK Precision 2120 trace issues
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vexatag:
Yeah haha, gonna check each point with my multimeter first.
vexatag:

--- Quote from: bdunham7 on March 15, 2021, 03:13:14 am ---pins 3, 5 and 5 of U603.

--- End quote ---

Which other pin did you mean here?
EDIT: Judging by the other BK owner's thread I'm assuming you want me to test pins 3, 5, and 6 on U603.

Extra edit: tested S601, the two end pins have triangle waves depending on the switch position. I have screenshots if you would like. As for U601 pin 9, there's not enough signal to pick up even at a low voltage scale (is that the correct term?). Testing U603 now, will update with my findings.

Third edit: U603 pin 3 had a triangle wave, pins 5 and 6 just had noise.
vexatag:
Here are the screenshots, the first two are the switch pins and the third is U603 pin 3. I also ordered two more BNC adapters.

Side note, the 212 has a math channel with a-b mode, so I could easily use it as a differential scope if that would be useful or relevant at all.

Secondary side note, I tested the calibration point on the 2120 and it seems to be working.
bdunham7:
Screenshots are good.  I need to figure out what those translate to as far a scale.

Can you show pins 5 and 6 of U603?  How much noise?

Edit:  Just for reference, can you show pins 7 and 14 of U603?  Should be ground and 5V, but I just want to see where they are.
vexatag:
I'll retest things later this evening with measurements onscreen (forgot to set them up last time).
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