Damaged PCSGU250 - Over Maximum input voltage

Instruments PC Oscilloscopes and Recorders
1

I did something I was not suppose to do and accidentally touch PCSGU250 CH1 to ~170VDC while I was trying to fix DC Motor drive circuitry. The house circuit breaker made me realize very quickly :-(. Now my son’s PCSGU250 is not communicating through USB and I’m guilty. I need your help to fix his scope if it is fixable. I’m sure/hopeful I’m not the first one doing this. If you can direct me to the possible cause, it will save me time to diagnose it and fix it. If it is not something I can fix, at least I save my time and only sorry about the damage I caused.
Some initial Inputs:

  • Tested with other USB ports, using the correct driver still receiving error codes from USB device. The USB ports tested works with other USB devices (PC is still safe!)
  • Looked at the PCSGU250 board, nothing looks obviously burned
  • I found the circuit diagram of the board from the forums but I decided to ask help before getting into detailed diagnoses
  • I’m an EEE (30 years+) so you can set your level of explanation accordingly
    Please Help!
2

I don’t think this can be fixed

3

No, this is not cost effective to fix.
If returned, we can maybe replace the board with a refurbished board.

4

Thank you! That is what I thought and saved time.
I will try to return it and hope for a refurbished board. (assuming that there is a US distributor/office/maintainer… I will search or please direct me to the right place where refurbish boards are possibly available :-))
Thanks,

5

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