EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: isb on July 16, 2018, 03:08:18 pm
-
After years of service, my DP832 gave up a ghost. The processor board won't boot any more. I checked the voltages and tried to isolate the problem with no success. There's not much else I can check or replace on that board so I think I'll just let this one go.
Although... the two analog boards seem to be fine. A quick look around revealed communication is done using isolated UART at 115200 with another 2 isolated signals (output enable maybe?). I haven't done any more of RE in hopes that someone else can't keep their logic analyzer to themselves. ;)
So! Has anyone reverse engineered the protocol used to control those boards? Or at least captured some packets.
-
Have you tried to reinstall the firmware? How did your unit die, at turn-on or while using? Do you see anything appearing on the display when you turn the power on? With some more description of the issue it might be solvable after all...
-
It just failed to start one day. It did have the well known overheating problem even with improved heat sink. It was so rare though that I didn't bother to fix it.
I didn't try to re-flash it. Rigol wants SN and current version when requesting firmware update. I guess they'll make exception but it's still a PITA.
I suspect the logic board failure is a bit more involved because I couldn't see any FLASH IO activity on the scope.
-
You can download rigol firmware from here without SN and Version:
http://int.rigol.com/Support/SoftDownload/3 (http://int.rigol.com/Support/SoftDownload/3)
http://www.rigol.com/Support/SoftDownload/3 (http://www.rigol.com/Support/SoftDownload/3)
If you had problems with overheating, did you check the 3-pin regulator is still working correctly? Or more in general, did you check all power supply voltages of the board?
Edit: added rigol.com link as it contains more recent versions