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Scope probe failure

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JonPyro:
Hi all,

Recently had a rigol probe fail on me. Attached is all that it outputs with any input signal.

I have had it replaced but just wondered what might have failed in it, I thought most probes just contain a large resistor and a tuning capacitor.

Any thoughts?

ArthurDent:
Looks like A.C. coupling and the square wave rises to its peak value then as the capacitor charges up, you see the exponential decay as the voltage out drops to zero. Then you get the same in the negative direction and it repeats. Check that the resistance from tip to BNC isn't open. Here is a typical schematic of a 10x probe. Probes should not read infinity.

http://electronics-diy.com/schematics/967/Scope-Schematic-1.jpg

ataradov:
Probably a small fracture in the wire or a series resistor that turned the probe into AC coupled one. Check continuity from the tip to the BNC connector.

JonPyro:
Sadly due to the time pressure of my warranty running out (in one day) I have already sent it back to confirm my free replacement so I can not measure the continuity......i am sure you are both correct ;)

Doctorandus_P:
The orinal probes of my Rigol DS1052E were also pretty crappy to the extend of being almost unusable.

They have a switch to switch between 1:1 and 1:10 and that swich does not work properly.
I should have send them back to Batronix years ago, but instead I just grabbed my other probes wich are of a better quality.

Another common failure are the rotary encoder knobs of these scopes, and mine also suffers from that. Some people have gotten free replacement frontpanel boards, but mine is out of warranty for years now and I've also made some modifications myself.
(For example the USB connector on the front panel was upside down, wich was quite annoying, but I fixed that).

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