DSO2D10

morgan_flint

Hello, I have the same problem as the OP.

The scope worked well several months ago, but when I connected it yesterday, everything seems to go OK except for the knobs (all of them).

UTILITY/FrontPanelSelftest confirms the problem: all pushbuttons work but none of the rotary knobs do.

I've tried software and firmware update to the latest version SW 1.0.2.0.0 (221028.00) FW 3205 with platform tools (it's impossible to do it via USB drive, as the V0 knob is needed to select the file...), and also downgrading it again to 1.0.1.1.0(20210726.0)-3202, but the problem persists

Any idea? Hardware failure at front panel PCB or other possibilities?

morgan_flint

morgan_flint replied at 2023-9-10 18:29
Hello, I have the same problem as the OP.

The scope worked well several months ago, but when I conn ...

PROBLEM SOLVED

The failure was caused by a faulty rotary encoder that, due to bad design, had one of its terminals short-circuited to the case and, hence, to ground, blocking not only its signal but that of the rest of the encoders, as they all share the same row in the front panel scanning matrix.

Technical details here, and the initial debugging of the problem in the posts from here at the same thread.

Basically, you have to detect which of the encoders have the problem checking continuity form both sides to ground and then replace it or repair it with some isolation tape.

BTW, this problem not only affects the DSO2000 series but also other models that share the same type of encoders and user interface scanning solution. In fact, the video that describes the problem and its solution is for a DSO5202P.