Products > Test Equipment
Rigol DP832 Random Reboots
chrisrossx:
My DP320 (Board Rev 02.20) started randomly rebooting a few months ago, once every 10 minutes or so... Today, it was rebooting every 5 seconds or so.
I took the cover off, to poke around, and I couldn't replicate the problem. I buttoned everything back up, and it's been on for over an hour. The only thing I can think of is that I did stress the wires on the top board trying to take it apart. However, I did not try and reseat any of the connectors...
Not a solution, but it did stop my issue...
blurpy:
Jerry Walker has a series of videos where he troubleshoots and fixes his rebooting DP832:
I found it very interesting, even though I don't have that device myself.
T2:
Part 3 of this video series points out exacly what my conclision was, just *much* better explained than I could.
TurboTom:
I just installed a 220µF/25V Rubycon ZL low impedance electrolytic across the troublesome 4.2V rail (because I had those handy) and verified that the noise on that rail dropped by at least a factor of five (from close to 2Vpp to ~400mVpp). I used existing pads for this and tacked the caps with a drop of glue to the PCB. No reboot problems after that anymore...
baldengineer:
I did both the LM1117 voltage mod and added additional decoupling caps. In my case, I used a combination of polymers and MLCCs. After 48 hours, my DP830 has stopped the reboots.
Thanks for taking the time to diagnose and document your fix.
Not my favorite soldering job, but it works. :)
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