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Wester547
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Last Activity: 03-01-2024, 05:20 PM
Joined: 11-14-2011
Location: CA.
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  • Re: Power supply build quality pictorial. part 2

    You are right, in my rush to post the PSU I mistook it for the earlier versions (made for the Dell Dimension 8100 or Optiplex GX400) which did use a proprietary pinout and/or a 24-pin connector. This unit uses a standard 20-pin connector and an unusual “Dell” ATX housing.
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  • Re: Power supply build quality pictorial. part 2

    NPS-330CB L Revision 01 (330W maximum) manufactured by Newton Power, made in Thailand during the fifteenth week of 2003. In accordance to the label, +5V is rated for 28A, +12V rated for 18A, +3.3V rated for 18A, -12V rated for 1A, and +5VSB rated for 2A. No combined rating for the +5V and +3.3V rating is given on the label, but it should be less than 200W combined going by the +5V and +3.3V ratings alone. Internally, there is a 30mm diameter 330uF 450V Nichicon LU primary filtering capacitor. The transient filtering stage features...
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    Last edited by Wester547; 09-22-2023, 07:42 PM.

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  • Re: Post help identifying capacitors here

    MrWizzard - a couple questions - what was the power supply powering the system seeing as how they are on the +12V VRM input of the CPU buck regulator? Did it run 24/7 for several years? I find it slightly worrying hearing about Nichicon's HD series failing like that even though going by the “Z4” date codes (the 4th week of December, 2002, according to the JIS C 5101 standard) they are over 20 years old now and were in storage for years (not particularly great, especially for water base capacitors such as the HD series). Chemi-con KZE...
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  • Re: [Retro] Asus A7N8X Deluxe Rev2.0 Power issue related to caps?

    Are the rest of the capacitors on the board OST, KZG, or Taicon? Or are they Rubycon YXG or a non-KZG NCC series? If the board hasn't been entirely recapped yet, a full recap may help, especially if the brands aren't very good. I would be surprised if the aforementioned MBZ failed in this manner unless the board had a hard life. It sounds like you tried swapping out every possible component except the monitor. Did you try it in safe mode? I'm wondering if the pins on the motherboard power connector have oxidized or...
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  • Re: The GOOD Capacitors Thread!!

    KZG or KZJ series? Possibly TMV and TMJ series? Those are the known bad series from Chemi-con. Most series are good. There were also some leakers from two to three decades ago or so which used a quaternary salt electrolytic composition from all the major brands. Rubycon’s MCZ and MFZ series have issues in high heat environments but most of their series are very good. Nichicon also had an infamously defective batch of their HM and HN series (and possibly HZ), made from 2001 to early 2005 (late 2005 for HZ). That lead Dell to settling a multimillion...
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    Last edited by Wester547; 08-10-2021, 06:59 PM.

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  • Re: Panasonic FC series - leaking? quality gone?

    It looks like they (the NOS FC series units) were manufactured in the second week of September, of either 1999 or 2009. Either way, disappointing since they were unused (and the FC series is supposed to be certified for automotive use…). I would not ever recommend using capacitors which have leaked because once they’ve leaked they may continue to leak their electrolyte. Added to that, they are leaking from the bung, and their acidic electrolyte could easily eat through PCB traces. Once this happens (the electrolytic leakage),...
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  • Re: XBOX One Power Brick Repair

    Wow, thanks for the exceptionally detailed explanation!

    I inquired as to whether the power transfer design was flyback or not (which it was, I should have observed, based on the lack of an output toroid on the secondary side) because discontinuous flyback designs puts great stress (in terms of heat output and ripple current) on the output caps, much more than continuous designs IIRC. The same goes for higher frequency VRM buck regulators on motherboards - the high ripple current, especially when it's close to the rated voltage of...
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  • Re: XBOX One Power Brick Repair

    Do the Xbox 360 and Xbox One power bricks use flyback or push-pull topology on the secondary side? I ask because japlytic posted [url= https://www.badcaps.net/forum/showpost.php?p=236932&postcount=581]this[/url] Hipro Xbox 360 power brick almost nine years ago in the current power supply build quality thread and mentioned the primary side MOSFETs were configured in a “push-pull” manner - is this referencing the topology or just the MOSFETs?

    Regarding the thread itself, as far as I know the highest failure rate cap wise...
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    Last edited by Wester547; 05-04-2021, 03:43 PM.

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  • Re: Power supply build quality pictorial. part 2

    Sorry, I wasn't addressing you and I didn't word that well. I just meant that it would behoove the reader to note however often later Delta units would cook CrapXons and LTECs by way of thermally inefficient output rectifiers on the +5VSB rail, this design is much more perturbing.

    I have a couple of venerable Newton Powers which emit that ringing noise from the transformer once I trick them into turning on with the paper clip. I guess that means the standard recovery diode dissipates the most heat neither when the PSU...
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  • Re: Power supply build quality pictorial. part 2

    That DPS-300KB-1A is designed very well EXCEPT for the standard recovery diode on the primary side (and you thought the toasty output diode on the +5VSB rail was a shoddy design in later units...). If it dissipates the most heat under light load or whilst unloaded, that means during actual PSU operation, when all other rails are also active besides +5VSB and when the fan is also spinning, the diode dissipates the most heat (when the forward voltage is higher, I suppose)? If so, that’s a terribly inefficient design which dooms...
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  • Re: Asus A7V8X hdd issue

    So this may sound like a ludicrous question, but I’m guessing you did measure every single capacitor, including the PSU capacitors, out of circuit, to determine whether or not they measured to spec? Because you can’t get accurate measurements in circuit due to capacitors being in parallel or series with other components. And I’m also guessing you waited until the capacitors cooled down if you did measure them out of circuit once desoldered as the higher temperatures from the thermal output of the soldering iron could result in higher capacitance...
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  • Re: Panasonic FC series - leaking? quality gone?


    I don’t want to denounce Panasonic (as a brand) too hastily if my last post ever came across as such (Panasonic FK, for instance, seems to be fine). It’s a possibility those Panasonic FPs (and the 100uF 16V Nichicon PMs you purchased from way back when) were somehow subjected to non-operating shock between the time they were manufactured and delivered, which could have resulted in the seals being compromised and the obvious happening thereafter.

    It may seem dubious at first given that capacitors have...
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    Last edited by Wester547; 12-14-2020, 10:39 PM.

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  • Re: Panasonic FC series - leaking? quality gone?

    The FP series is the miniaturized FC series with a much higher ripple current rating. It was released over two years ago. Both series are supposed to be certified for automotive applications. I’d guess it’s non-aqueous like FC going by the temperature rating in the datasheet (attached). In accordance to Panasonic’s date decoding system (also attached), those have August 2019 datecodes. That said, seeing nearly twenty of them leak at both leads unused (genuine Panasonics retaining their leads in full, assuming the...
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    Last edited by Wester547; 12-04-2020, 03:18 PM.

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  • Re: Panasonic FC series - leaking? quality gone?

    I enclosed the datasheet for the HFE series. HFG/HFQ was the recommended replacement at the time, after which the FC series became the modern equivalent. It seems all HF* series use the quaternary salts in the electrolyte and so suffer from this problem. I can understand very old series eventually succumbing to this “plague” of sorts, but I don’t understand how a problem such as this could slip QC and QA procedures by with regards to the FC series, a series still in production to this day, whilst PW and LXZ appear...
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    Last edited by Wester547; 11-27-2020, 03:04 PM.

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  • Re: Panasonic FC series - leaking? quality gone?

    LXJ too? Yikes. Never seen one leak before but I wouldn’t put it past them. I know they were also used in old proprietary Newton Power 200W PSUs from 20+ year old Dells. FC should not use the quaternary ammonium salts. Chemi-con released a notice in 2003 (attached in [url= https://www.badcaps.net/forum/showpost.php?p=636818&postcount=1861]this[/url] post) maintaining that none of their series in production at the time used the quaternary salts, including SXE, whose older datecodes were also known leakers. But I noticed LXJ...
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  • Re: Panasonic FC series - leaking? quality gone?

    They are both non-aqueous. I don't know if both series employ the same organic solvent (gamma-Butyrolactone is a common solvent) and solution. The only way to know that is to ask Nichicon, and all capacitor manufacturers are generally tight lipped about the formulas (although some basics may be revealed in certain engineering drafts). I'm not too worried about it because Panasonic FC is known to exhibit this issue but Panasonic FK hasn't as of yet and both series are non-aqueous. I've never heard of any reliability problems with Nichicon...
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  • Re: Panasonic FC series - leaking? quality gone?

    I recollect you saying the case size was 5x11 for those 100uF 16V Nichicon PM capacitors, though. According to the datasheet, it should be 6.3x11. So I wonder if they truly were genuine. Nichicon PR, PF, PL, PY, PQ, and PG were all affected by the “quaternary ammonium salt” issue....
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  • Re: Very old Sanyo OS-CONs. Safe to use?

    Sorry, got carried away and forgot to mention that part. Use them at your own risk (with caution). Although, despite being Japanese made solid capacitors, something makes me uneasy about using said capacitors from three decades ago, even in breadboard projects. Of course, better those than 30 year old Junkcons......
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  • Re: Very old Sanyo OS-CONs. Safe to use?

    I wouldn't deem myself an expert either, however interested I am in the topic.

    But those Sanyo OS-CON capacitors (technically not polymers in the strictly technical sense of the term; they use a special type of semiconductor material for their electrolyte) are very old now. They are ~32.5 years old. And even though they are sealed with epoxy rather than rubber, this is enough time for some precipitation and deterioration, regarding their specifications, to occur. Their leakage current has probably risen quite a bit as is characteristic...
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  • Re: best cheap/free scores 1.1

    Also forgot to mention Nichicon HM/HN/HZ post-2005 capacitors, although it’s yet to be seen if they will make it 15+ years without unexplainable failure.

    All according to their respective datasheets, Panasonic FM is equal to Chemi-con KZH but in larger case sizes. Rubycon ZA and Nichicon HC seem to be very low ESR, even lower ESR than KZH and FM (although not quite low ESR enough to be deemed “ultra low ESR”, however relative and loose a term that may be), but in rather large case sizes. Very common to find them (ZA...
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    Last edited by Wester547; 07-20-2020, 06:31 PM.

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