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Old 13th Nov 2019, 12:18 pm   #9
IanG3XYV
Pentode
 
Join Date: Sep 2014
Location: Bedford, Bedfordshire, UK.
Posts: 172
Default Re: Philips/Fluke Oscilloscope

Joe,

I have a couple of PM3055s and like them a lot. They are both used occasionally and working well so I've had no need to delve into them. However I have experience of a couple of earlier Philips scope - PM3217 and PM3264. Both had power supply faults, the 3264 I think with the infamous Schaffner/RIFA mains input capacitor failure and the 3217 with the dc to dc switched mode PSU. Philips love those PSUs to supply all the dc rails and I imagine that in the 3055 will be similar. I think I had to replace one of the highly stressed switching transistors and/or diodes as well as the IEC input filter unit.

It's very much an analogue scope but with a microcontroller using the I squared C Philips bus to lots of the leg work like Autoset.

Thanks to Waveydipole for posting the link to the manual - I'd never found one before. Unfortunately as is often the case, it's not complete, but there is a bit of guidance on PSU troubleshooting.

Good luck and do let us know any progress.

Ian
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