made some experimental measurements today before taking the scope apart in order to make some images that i will post later.
Signal applied to scope from a waveform generator:
wave form: sine
U = 2Vpp, f= 7, 14, 30, 100 Mhz........scope displays: 20mVpp on all "f"
5Vpp 45mVpp
10Vpp 90mVpp
amplitude unchanged 7 to 100 Mhz
same amplitude coupled A or D
channel1: however the displayed sine wave is not stable, it moves up and down slightly at appr. 10Hz.
Surprisingly also channel 2 works today giving very similar results. Maybe fiddling around on the rig has changed something.
up to this test channel 2 was dead.
Was the signal applied a sinewave? Do you get the same relations for a DC signal?
The 60V you applied by error were DC or AC? If AC, high frequency?
Find the affected parts should be easy, just follow the path. But avoid links/images/schematics from the non-A versions, because it's input stage is slightly different to A versions. However, I don't know if there are different variants for the A versions, that's why we need images/pictures from your oscilloscope PCB (front-end).
https://www.eevblog.com/forum/projects/project-yaigol-fixing-rigol-scope-design-problems/msg890966/#msg890966The information contained in the link above should be enough to find/replace the faulty parts, assuming that both are the same variant.
However, the capacitors are a different history, and maybe a big problem, because we don't have any reference, so fingers crossed.
Do you have problems to found the relationship between the electrical scheme and the components in the pcb? SMD marking codes, etc...
For semiconductors this link may help:
http://www.ecadata.de/mysuchneu/ecadata.php?F_SPRACHE=1What components have you checked?
Also, are the vertical position knobs responsive?
Edit 1: Wrong link.