I have some Nichicon 10 uF 16 V 105° caps out of a Bose sound system with no series markings just A427 which I assume is a date code? Don't know if they were specially built for Bose or they are just general purpose caps. They are in the secondary of a SMPS. I'm guessing a low ESR cap would be the proper replacement?
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Last edited by ghiotom; 03-29-2021, 07:35 PM. -
Re: Nichicon - No series identification
Linear regulators - you could use anything there.
10uf 50v panasonic FR or even 10uf 35v tantalums would work -
Re: Nichicon - No series identification
Most curious design here.
Agree with the analysis that these are linear and do not require low ESR caps, this does appear to be part of a SMPS of some sort and there should be larger input side filtering that I don't see, or this is really low current circuitry that might be wasting more power or $$ by using SMPS here...? Maybe because I'm just not seeing the whole schematic...Comment
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Re: Nichicon - No series identification
Here's the full schematic. Those two capacitors highlighted in the first post had ESR 0f 8.6-8.8 ohms each. The two Mosfets (Q101, Q102) had blown and after replacing them along with the controller(U101), several resistors (R101-R104), and Mosfet Q103, I got it working. That lasted about 3 months before they blew again. Just trying to figure out what's happening to the Mosfets.Comment
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Hello All, I have on the bench a couple of PSU's which have some failed Nichicon PL series caps. They didn't "puke" their guts through the top, but instead "diarrhea'ed" corrosive brown electrolyte through the bottom, down the legs and onto the board. On one cap, the electrolyte rotted the cap right off the board leaving 2 little stubs, and also corroded a trace on the foil side.
The PSU's are Power-One MAP series and are ringing-choke topology. The semiconductors have date codes in 1993. The PSU's were used in a commercial application, fan-cooled. They had failed... -
I want to calculate capacitor ESR referring to below guide.
https://forum.digikey.com/t/calculat...-from-tan/2633
I must find out dissipation factor(Tan(δ)) for nichicon lxj series(6.3v 1500uf,25v 1000uf ,10v 2200uf)
I finally found out datasheet which has all series of nichicon capacitor.But unfortunately, It removed old nichicon capacitor.
Is there anyone who still has old nichicon datasheet which has information of LXJ series? -
A few days ago,I destroyed one of my japanese retro game console by pluging it to 220v outlet.
https://www.badcaps.net/forum/troubl...e-been-blew-up
and I finally fixed this retro game console by soldering varistor and glass fuse.
But I noticed that When I measure voltage of PSU's 5pin connector, it is 8.80-9.07v, 5.13v,3.40-3.48v,GND,GND instead of its rated voltage of 9v 5v 3v GND GND.
I have spare console... -
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