Philips PM3323 Oscilloscope
I have a Philips PM3323 digital oscilloscope which has not been used for
some time. It has developed a problem where both A and B channels have become very noisy such that the noise on the display is now larger than the wanted signal - making the scope unusable. Timebase and y-axis functions all appear to be still working OK. Can anybody tell me whether this fault is likely to be economically repairable? Many Thanks, Greg |
Is it possible to clean the front switch?
Greg wrote: I have a Philips PM3323 digital oscilloscope which has not been used for some time. It has developed a problem where both A and B channels have become very noisy such that the noise on the display is now larger than the wanted signal - making the scope unusable. Timebase and y-axis functions all appear to be still working OK. Can anybody tell me whether this fault is likely to be economically repairable? Many Thanks, Greg |
It's most likely the 10 uf @ 16v aluminum bypass caps. They dry out.
You'll probably have to replace them all. Phil J "Greg" wrote in message ... I have a Philips PM3323 digital oscilloscope which has not been used for some time. It has developed a problem where both A and B channels have become very noisy such that the noise on the display is now larger than the wanted signal - making the scope unusable. Timebase and y-axis functions all appear to be still working OK. Can anybody tell me whether this fault is likely to be economically repairable? Many Thanks, Greg |
The front panel switches control the voltage range indicated on the display
correctly, but don't seem to affect the magnitude of the noise on the trace. I suspect the problem may be on the A to D converter card. Is it possible to clean the front switch? Greg wrote: I have a Philips PM3323 digital oscilloscope which has not been used for some time. It has developed a problem where both A and B channels have become very noisy such that the noise on the display is now larger than the wanted signal - making the scope unusable. Timebase and y-axis functions all appear to be still working OK. Can anybody tell me whether this fault is likely to be economically repairable? |
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