Fanless YESICO FL-550 recap

[wetc]

I recently got this brand new fanless 550w supply for cheap from the Geeks.com. When I opened it up (it didnt come with a manufacturer warrantly), I saw the dreaded F-word Fuhjyyuuu everywhere -- the primary input caps, output caps and everything in between.

I like this supply. Now that I have experienced fanless, I'm not going back, so I decided to recap, before it has a chance to fail on me. The build quality is also good (except for those F caps), with nice big output transistors (5 S60D40C and 2 S30D100C). The input transistors were scratched out so I dont know what they are, but they have the same package type. It has heavy sinks and an aluminum case.

Here are the capacitor complement:
input:
820uf/200v/25mm LH series (x2)

output:
4700uf/16v/12.5mm TLR series
4700/10/12.5 TL
3300/10/12.5 TLR
3300/10/10 TL
3300/10/10 TM
2200/16/10 TLR
1000/16/10 TLR

5vsb:
1500/10/10 TLR
1000/10/7.5 TL

and several small general purpose caps TNR, TN, and SS series

I couldnt find any details on the difference between TL and TLR series.

The operating environment inside the power supply case is probably around 60C. The outisde heatsink gets to 46C (this is in California summer), so its reasonable to assume that the inside temp is higher. I'm only drawing 150 watts from the wall when the computer is heavily loaded, and it usually sits at 80 watts idle.

Now for some questions.

1. Should I replace the input caps? The LH series is rated for 1000Hours, so I guess I could do better. What would be a good part for this?

2. Given the temps that the caps would see, what would be the best replacements? Note that the caps were soldered "FLOATING", meaning that they are not flush with the circuit board, and are sitting at least 1/2 inch off the board. I think they did this to accomodate a bigger size capacitor, so they could derate with temperature.
So, instead of a 12.5mm cap, we could specify a 16mm cap.

I was thinking of going with Panasonic FM or Nichicon HE, but I'm not sure those are the best alternatives.

This is a great site, I'm glad I found it.

Thanks

[Per Hansson]

Re: Fanless YESICO FL-550 recap

Hi, Welcome to Badcaps,
I would look into the Samxon GT series, 10000h life

This will be important for your PSU, but if it will work or not depends on how close the ESR is to your current caps... So do look up the specs and compare

http://www.capsmod.net/caps/

[Krankshaft]

Re: Fanless YESICO FL-550 recap

My GOD!!!!

Fukyuu caps in a fanless PSU.

Now I've seen everything. I've ordered switching bricks from the geeks before and I've opened them all no Fukyuu caps in my orders yet.

My recommendation in the future screw fanless PSUs you can buy whisper quiet fans that move enough air to keep the PSU cool and keep temps down at the same time.

Long endurance (high temp rated) caps are a must in the application.

[Krankshaft]

Re: Fanless YESICO FL-550 recap

I see the Geeks are sold out boy will they have alot of disgruntled customers hopefully just out of the return period .

What is that POT for on the rear it doesn't have any fans?

You would think Fukyuu would change their name by now?

Now they make caps in not just Black and Blue but Green and Brown too but their sickening logo burned into my retinas still remains .

Yes replace ALL Fukyuu caps including the inputs!!!

Don't believe their endurance specs. Due to their reputation the datasheets need to be looked at skeptically (with respect to the caps construction).

However as a guide yes the specs on the sheet are probably what the manufacturer expected when specing them out for the PSU.

[Krankshaft]

Re: Fanless YESICO FL-550 recap

Here is Pansonics cap line comparision table.

http://industrial.panasonic.com/www-...W.html#bunrui2

If you're looking for a 10,000 hour endurance and low ripple then the EB series is what you're looking for they can be found on Digikey.

Usually I would throw the Pana FC series in any hot PSU environment but in this case since it doesn't have a fan and the entire units body is essentially a giant heatsink I think "big gun" caps are in order.

As for the line caps I use either the TS-HA, TS-HB, TS-HC, or the TS-ED series depending on which will fit. Since some series' are too large.

Don't worry about endurance too much on the lines any name brand cap is head over any of those Chinese turd caps already in there.

[kc8adu]

Re: Fanless YESICO FL-550 recap

it would almost be worth buying one of these and setting it up with a load to see how long it goes before it blows up!considering the short lifespan of fuhjyyu in well cooled units it would not take long!

[Krankshaft]

Re: Fanless YESICO FL-550 recap

Yeah it would be fun.

The instant I saw those caps and saw the PSU didn't have a fan I knew it was a disaster. They can't even survive with a fan .

Oh yeah one addition the EB series aren't low ESR sorry about that. I was in a hurry earlier.

I'd recomend the FM series low ESR (even lower than FC) with a 2000-7000 hour life or the Samxon series the other poster mentioned.

Just pull up the datasheets for the cap series you choose and make sure that their size will fit diameter is the most important measurement.

The series' mentioned in my other post for the line caps is fine.

[wetc]

Re: Fanless YESICO FL-550 recap

The pot at the rear is for what they call a "Thermal Management System", where you get to set the internal temp at which the fan header will turn on. I've tested it and it does trip when I set it to around 55C. The max is 62C.

Yes, I was also shocked at the cap selection after I read around in this site.

Thanks for the suggestions.

[wetc]

Re: Fanless YESICO FL-550 recap

Ok. It seems that the preference here is to have high endurance. So armed with that, I looked at Digikey and sorting the results by lifetime at 105C, two names always come up at the top of the list:

[wetc]

Re: Fanless YESICO FL-550 recap

I accidentally hit ENTER and the edit time expired as I was typing... oh well


Nippon Chemicon KY and
Nichicon HE.

Both are low impedance, though there could be a difference in how low is "low". But since I could find any info for the ESR of the original Fyu caps, I'm not that worried.

I opted to go 1 size higher because the endurance is always higher, and there should be no problem with fitment as the caps are mounted high off the board anyway. For example, i got endurance of 10000 hrs for the 4700uf/16v caps. That should be enough insurance. The lowest life I got was for the 2 input caps, 3000Hrs Panasonic ED (these must be 25mm).

Do you guys here have a preference for the UCC vs the Nichicon? Have the KY or the HE been known to fail?

Thanks

[gdement]

Re: Fanless YESICO FL-550 recap

Nichicon HE and Chemicon KY have equivalent specs. I don't know of any differences between them at all. I wouldn't be surprised if they were literally the same caps with different wrappers on them (but probably not).

I'd use either in a power supply. As far as I know, I think this class is the lowest the ESR gets before you start compromising on the endurance rating. A power supply normally doesn't need anything lower ESR than the KY/HE anyway.

As it happens, I used KY to repair my monitor, but ended up with HE when repairing another, same model LCD about 6 months later. I'm running both of them in a dual setup. So I guess I'll have the comparison results in about 10-20 years.

[Krankshaft]

Re: Fanless YESICO FL-550 recap

Why would they scratch off the component numbers on those parts??

That's alot of manual labor for something nobody will probably ever see.

Are they using counterfeit parts and just want to hide their true identity ?

[KeriJane]

Re: Fanless YESICO FL-550 recap

Why would they scratch off the component numbers on those parts??

That's alot of manual labor for something nobody will probably ever see.

Are they using counterfeit parts and just want to hide their true identity ?

Hi Krankshaft

One of two likely reasons stand out:

This particular PSU was part of a batch likely to be reviewed by the likes of JonnyGuru and they didn't want it known that their "550w" PSU was limited by 200w worth of critical parts. Maybe they didn't know exactly which one(s) were to be reviewed so they did them all.

or...

The Chinese Counterfeit Component Company has an automated scratching-out machine so that the "real" specification needs never be known or even published. This saves all kinds of bother such as dealing with meddling governments, ornery technicians or just plain stupid end-users.
The part may never have been printed with a number.... just a scratchout.
This would probably work with parts sold in bulk so long as the tape or box was marked.

Oh well,
Keri

[Wizard]

Re: Fanless YESICO FL-550 recap

Not only that, even osborne PC had few common 40 pin ICs # sanded off.

Um, Geeks, I loahe that website. I told my friend many time to stop that as it means supporting junk stuff and from shady makers too. And poor deals on outdated stuff.

Cheers, Wizard

[Krankshaft]

Re: Fanless YESICO FL-550 recap

Every site has crap but if you search long enough and know what you're looking for you can get some good deals.

Like the 5 amp 12 volt switchers (7.00 each) I needed for my Accurian HD radios I got off e-bay. These early generation HD receivers draw alot of current during startup and 5 amps at 12 volts in a power brick (not an open frame supply) isn't easy to come by.

They were made by some Chinese company (then again what isn't these days). OGD I think cracked it open and it was pretty well built X and Y caps, a line choke, and a MOV. I have 2 in service and they've been ticking since 07.

Interesting view on the scratched out components just another day at Hong Kong Flyapart LLC I guess .