Nichicon Electrolytic Capacitors leaking - common problem? ( Rifa X and Y also)

[Gyro]

Hi, thanks for the information. Are the failed RIFA capacitors all PME 271 type ?

Yes, those are the ones.

[tggzzz]

Don't forget to look inside the mains power socket. Sometimes there is a filter inside it, and guess what... !

[bd139]

Don't forget to look inside the mains power socket. Sometimes there is a filter inside it, and guess what... !

You mean RIFA filled pipe bomb

[factory]

Hi, thanks for the information. Are the failed RIFA capacitors all PME 271 type ?  Most of the PME271 I have, even the new old stock, NOS, have cracks. I also have RIFA PMZ2050M NOS but without cracks. Regards.

RIFA/Kemet (whatever they call themselves in the future) PME, PMZ, PMR, PZB & PMP are all metallized paper types, throw them away unless you like the random RIFA madness failures, best place for paper based capacitors, is in history books and/or a museum.

David

[CZAK_SHADETEK]

Im in the middle of recapping the P/S on an HP 8080A. Found all the rifas but still something wrong... test pins at the p/s are all reading correctly (A = 11.8v,  B = 5v ~ 1.8v saw, etc.) but nothing at the multicon. Hoping someone has a schematic or a link.
THx!

[tggzzz]

Im in the middle of recapping the P/S on an HP 8080A. Found all the rifas but still something wrong... test pins at the p/s are all reading correctly (A = 11.8v,  B = 5v ~ 1.8v saw, etc.) but nothing at the multicon. Hoping someone has a schematic or a link.

Don't know what you mean by "multicon".

Don't forget the ripple (AC) voltage is as important as the mean (DC) voltage, and is a better indicator of whether the bulk capacitors have dried out.

[Zenith]

Im in the middle of recapping the P/S on an HP 8080A. Found all the rifas but still something wrong... test pins at the p/s are all reading correctly (A = 11.8v,  B = 5v ~ 1.8v saw, etc.) but nothing at the multicon. Hoping someone has a schematic or a link.
THx!

Almost all HP manuals are easily available on the WWW. I'd be surprised if this wasn't.

If you are very unlucky it will be a PSU HP bought in from another company, and the schematic isn't available.

[factory]

The manual with circuit diagrams for the HP 8080A is on ElektroTanya, for some unknown reason keysight haven't got the pdf anymore, but do have some for the plug-in modules; https://elektrotanya.com/hp_agilent-technologies_8080a_frequency_generator.pdf/download.html#dl

Seems to be a switching based supply, with linear regulators for each secondary outputs, probably best to start a new thread for the repair.

David