EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: sarahMCML on October 14, 2022, 05:44:47 pm
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Hi,
Firstly, apologies for posting this on the end of an old post from February this year. I realised later that probably nobody would read it, so decided to post it here as a new topic.
I have the same problem as Norbert67 had, that is, channels 1/3 deflecting way UP! screen in my case, when switching to Digital Mode. Except my PM3394B hasn't recovered.
It fails Self Calibration after about a minute, and comes up with a "Calibration 101" error message at the bottom of the screen. Of course, there is no mention of this error in the Service Manual.
I have 2 questions for the experts here:
1) Did Philips/Fluke ever produce a separate Fault Finding Manual for this range of scopes?
2) Which chip produces the fault, because it's not too obvious to me going through the maintenance manual, probing the board hasn't revealed anything, and the in-built test routines of the DAC's that I've looked at seem to be fine!
Many thanks,
Sarah.