Hi guys
I purchased a Hanek DSO5072P back in early September with the initial idea of using tinhead's excellent hack to 'upgrade' it to 200Hz, but as 'Lady Luck' was never a regular visitor, I usually get 'Sod's Law' (If anything can go wrong, it will go wrong), I decided NOT to attempt the hack.
It has worked fine up until yesterday (14 October), when developed a strange problem: The voltages are all reading far too high (see attached screen shot of 'Probe test').
I have been searching the tread (nothing relevant) and reading (nothing found).
I have done no 'Hacks' or software or firmware upgrades and the scope was working fine until Yesterday.
The only thing I have done, is to download a 'backup' using Tinheads excellent software via the front USB, hence the 'upgrade count' of one on 'System Info' screen shot.
The 'backup' was done when first got the scope and it has worked OK until now. As I don't know if it's a software or hardware problem, I haven't attempted to 'reinstall' the 'backup', for fear of making things worse.
I've tried 'self calibration' and 'Default Setup', but the problem persists unchanged.
This is getting weirder, now CH1 Freq. is acting up: It's jittering between 1KHz and 2KHz, even though the waveform from the Probe check test point is stable. Only on CH1, CH2 is stable at 1KHz, but still reads 53.6V Pk-Pk. Etc.
Moving through the Secs/Div also gives some very odd frequency readings on CH1, CH2 is OK.
If I turn up Volts/Div on either channel, the second step reduces Pk-Pk to 26.6V, on the third step, a relay clicks and I get 9.76V. One more step gives another relay click and Pk-Pk drops to 4.64V, a further step drops to 2.1V. Of course the waveform top disappears off the screen with the first step turn.
Turning the Volts/Div down from normal square wave display, just drops to a 'flat line' then nothing changes with further steps downwards (no relay clicks).
I don't want to return under warranty, as I purchased from a supplier in China, plus the Spanish Mafia (Government) hit me with 'import duty' of almost €50 (Euro's), and they would probably do it again. As a pensioner living on a basic English State Pension, expenses like those above I cant afford, plus the postage from Spain to China is also 'exorbitant'.
So, any help would be much appreciated.
oneeye