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Old 06-22-2021, 11:11 AM   #1
mgrharry
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Default Flir Boson Development Board Damaged USB

Working on a Flir Boson Development board, model number 250-0593-02-r210. USB port was ripped off, tearing several traces on the board. I reattached it, and bridged the torn traces. It now shows 5V on pin one of the connector and up through the cap at C7 but no significant readings on any of the other pins and the device is not recognized in device manager as a USB interface. None of the traces on pins 5-10 of the connector were torn and it looks good under microscope. There were two pads there were torn completely off (highlighted in red on port-ripped-off.jpg) but I assume these were just for structural reinforcement. Thoughts?
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File Type: jpg board full view.jpg (1.86 MB, 11 views)
File Type: jpg port-reattached-closeup.jpg (595.5 KB, 10 views)
File Type: jpg port-ripped-off.jpg (35.3 KB, 8 views)
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File Type: pdf boson_development_board_app_note_r101.pdf (2.83 MB, 0 views)
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Old 06-22-2021, 11:21 AM   #2
stj
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Default Re: Flir Boson Development Board Damaged USB

check for continuity between the cable and board to see if the socket still makes contact with the plug.
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Old 06-22-2021, 12:30 PM   #3
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Default Re: Flir Boson Development Board Damaged USB

If the plug checks ok, check that TVS2 & TVS3 are not shorting the data lines to ground.
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Old 06-22-2021, 11:48 PM   #4
mgrharry
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Default Re: Flir Boson Development Board Damaged USB

There is continuity between socket & plug. For TVS2 and 3 I will remove and test them. Will data lines function without them?
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Old 06-23-2021, 06:20 AM   #5
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Default Re: Flir Boson Development Board Damaged USB

yes
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Old 06-29-2021, 10:06 PM   #6
mgrharry
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Default Re: Flir Boson Development Board Damaged USB

For TVS2 multimeter reads .790 forward and .751 in reverse direction. So it seems to be bad. However, when it is removed, I still get no device recognition. It does seem likes that the problem is somewhere around pin two, as I believe it was originally bridged to pin 1 with a blob of solder when it was first reattached so 5v may have run down that line and damaged the diode.
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