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Rigol MSO5074 locking up
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jerryk:
I have had a couple of events where my Rigol MSO5074 screen just locks up. Reboot seems to fix it. When I turn it on it beeps three times during the boot sequence which is something I haven't noticed before. Another observation is that it seems to run warm both in the unit and in the decoder cable attachment. I have attached an image of the temperature at the decoder cable. Are these observations normal?
Jerry
thm_w:
Temperature is normal. Although you could try pointing a fan at it and seeing if it reduces the screen lockup.
Anything you are specifically doing when it froze?
Firmware is reasonably up to date I assume?
https://www.eevblog.com/forum/testgear/hacking-the-rigol-mso5000-series-oscilloscopes/msg4398940/#msg4398940
https://www.eevblog.com/forum/blog/new-rigol-scope/msg2552004/#msg2552004
jerryk:
The first event I was measuring the flyback from a starter solenoid. It's something I have done before without issues. It actually put the screen in a confused state. Reboot brought it back to normal. I was concerned that I may have done something extraordinary and have not tried it since. The most recent event was measuring a square wave output from an 8 bit pic microcontroller. In both cases the power was from a DC lab power supply. The thing that did catch my attention the most was the heat in the end of the LA cable. That seemed odd. I don't know enough about how that cable functions. I'll check the firmware currency.
Thanks - Jerry
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