ST Nortel PNE-5 PSU Service & Recap
Posted: 04 Jun 2021 10:53
Acquired a filthy 520 ST recently and just going through the process of servicing it. Here is the PSU.
Also, link to Icky's post about his PSU.
Chip is NE5561N
Caps are 2x 470uF 25V and 3x 4700uF 16V
Start to finish:
Put some capton tape over the wires as I didn't like the idea of them being naked like that...
Decided to ESR test a couple of the old caps to see how they were doing:
4700uf 16v:
5612uf
Vloss = 1.6%
ESR = 0.17 Ohms
470uf 16v:
544.7uf
Vloss = 0.8%
ESR = 0.22 Ohms
Also, link to Icky's post about his PSU.
Chip is NE5561N
Caps are 2x 470uF 25V and 3x 4700uF 16V
Start to finish:
- PXL_20210604_080617507.jpg (383.37 KiB) Viewed 1693 times
- PXL_20210604_080751944.jpg (297.67 KiB) Viewed 1693 times
- PXL_20210604_082131587.jpg (334.3 KiB) Viewed 1693 times
- PXL_20210604_084429060.jpg (297.93 KiB) Viewed 1693 times
- PXL_20210604_084723490.jpg (277.63 KiB) Viewed 1693 times
- PXL_20210604_084832912.jpg (295.65 KiB) Viewed 1693 times
- PXL_20210604_084846141.jpg (207.85 KiB) Viewed 1693 times
Put some capton tape over the wires as I didn't like the idea of them being naked like that...
- PXL_20210604_092252060.jpg (334.67 KiB) Viewed 1693 times
- PXL_20210604_093637507.jpg (368.57 KiB) Viewed 1693 times
Decided to ESR test a couple of the old caps to see how they were doing:
4700uf 16v:
5612uf
Vloss = 1.6%
ESR = 0.17 Ohms
- PXL_20210604_094122514.jpg (319.31 KiB) Viewed 1693 times
470uf 16v:
544.7uf
Vloss = 0.8%
ESR = 0.22 Ohms
- PXL_20210604_094206066.jpg (382.8 KiB) Viewed 1693 times