Hi everyone,
I have purchased a DS1054Z scope in Feb 07, 2016 form a eBay store by the name tool-boom, with it came a 3 year warranty and the full list of items that suppose to come with the scope.
I have this scope for almost the second year and it have never failed me once, except 3 week ago when the vertical ranging problem of CH2 of the scope started, I tried the other 3 channels and they were fine, and didn't have such problems.
the problem is incredibly strange in which the ranges from 760mv/div to 3.3v/div with fine adjust or 1v/div to 2v/div in coarse adjust worked fine, and displayed expected 3.00v square wive @ 1KHz cal signal, below 760mV/div or above 3.3v/div in fine adjust and the scope max out the trace and dose not show the signal, yet the the scope returns to displaying signal normally at 35.5v/div to 100v/div in fine adjust or 50v/div to 100v/div in coarse adjust.
note that I didn't update the firmware from the current version 00.04.03.sp2.
I contacted on July 5,2017 rigol and they didn't contact me with anything useful to me or contributing to solve my problem since...
if anyone have faced a similar problem and knows a solution please post...
thanks.