MSCam Frame Retrieve Error

[qdong8]

Hello, we need your help.
I ordered the miniscope and the DAQ PCB from LabMaker and they worked well. Last week the coax cable was broken and came off from the SMA connector. So I tried to solder the cable to a new SMA connector. After that, when I connected the miniscope to my computer, the 3 LED lights on the DAQ PCB were on and  the excitation LED in the miniscope was also on. However, I got the MSCam Frame Retrieve Error when I tried to connect the miniscope using the software. I wonder if it is cause by some problems of the soldering.
Thanks!!!

[Daniel Aharoni]

Hi qdong8,
Yes this sounds like an issue with the soldering. Did you check for shorts on the SMA2Coax PCB before plugging it into the DAQ PCB?

[qdong8]

Hi Daniel,
I didn't do that. But I am sure that there was no contact b/w the two wires. Could it be caused by shorts? If so, does it mean the DAQ PCB is damaged and cannot be fixed? Now the PCB looks good. The 3 LED light are all on. It can still be recognized by my computer. Looking forward to your answer.

[Daniel Aharoni]

Hi qdong8,
If the coax cable did short near the SMA connector on the DAQ PCB then there is a chance inductor L13 was fried and needs replacing. L13 can get damaged by a short and cause the exact situation you are describing... all 3 green LEDs are on on the DAQ PCB, the red and blue LED are on on the CMOS PCB, but the computer cannot establish a connection to the video stream.

[qdong8]

Thanks a lot! I will try to find it out.

[qdong8]

Hi Daniel,
I replaced the L13 inductor and it works now. Thank you so much!
I measured the resistance of the inductors. The old L13 is only 0.3 ohm, while the new one is ~1.7 ohm.

Hi qdong8,
If the coax cable did short near the SMA connector on the DAQ PCB then there is a chance inductor L13 was fried and needs replacing. L13 can get damaged by a short and cause the exact situation you are describing... all 3 green LEDs are on on the DAQ PCB, the red and blue LED are on on the CMOS PCB, but the computer cannot establish a connection to the video stream.