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Search: Posts Made By: Behemot
Forum: Troubleshooting Power Supplies and Power Supply Design 11-18-2021, 11:30 AM
Replies: 32
Views: 5,502
Posted By Behemot
Re: Corsair CX400W 5vsb goes into safety loop

I have a feeling that those ostors are ultra-low ESR, Seasonics puts few of them in their OEM units for some reason.
Forum: General Capacitor Questions & Issues 10-30-2021, 03:00 AM
Replies: 996
Views: 493,532
Posted By Behemot
Re: The Hall of Shame - Badcaps Photo Montage - Rubycon MFZ series

Got a report from some guy that some of those MFZs I've sent him bulged in storage. Not sure what he did with it, I've checked my two boxes of them caps, everything looks just fine.:why:
Forum: Troubleshooting Power Supplies and Power Supply Design 09-20-2021, 02:21 AM
Replies: 48
Views: 23,248
Posted By Behemot
Re: Powerware 9120 Online UPS

Consumption of the UPS itself is by order of several magnitudes higher than any losses through capacitor leakage. If you want some real difference, upgrading power silicon components to those with...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-15-2021, 03:59 PM
Replies: 48
Views: 23,248
Posted By Behemot
Re: Powerware 9120 Online UPS

leakage current is the last parameter that should bother you, it's generaly very small either way and it only matters in some kinds of audio/amplifier/radio circuits, not in filtering; watch ESR so...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-13-2021, 07:01 PM
Replies: 22
Views: 13,012
Posted By Behemot
Re: Need tips in fixing APC 1500VA UPS having buzzing noise

Some units do that, but they're cheaping it out constantly, waddaya expect.
Forum: Troubleshooting Power Supplies and Power Supply Design 09-12-2021, 04:11 AM
Replies: 48
Views: 23,248
Posted By Behemot
Re: Powerware 9120 Online UPS

Don't bother with the large caps, those rarely fail (unless there's like 80+ °C and you use for for decades 24/7).

You can try to replace KME with LE, they have slightly lower ESR but still higher...
Forum: General Capacitor Questions & Issues 09-08-2021, 03:11 AM
Replies: 13
Views: 1,030
Posted By Behemot
Re: Fake Nichicons?

Yeah I got those left-over Rubycons MFZ, or MBZ 1000/6,3 which in particular do not exist in datasheet but vere amongst the most common on motherboards.
Forum: General Capacitor Questions & Issues 08-24-2021, 11:31 PM
Replies: 13
Views: 1,030
Posted By Behemot
Re: Fake Nichicons?

I've never seen any datasheet listing capacitor weight. So lot of fuzz about nothing IMO.
Forum: General Capacitor Questions & Issues 08-11-2021, 11:38 AM
Replies: 53
Views: 10,522
Posted By Behemot
Re: Würth Elektronik Electrolytic Capacitors Official Thread

I've just scrapped some tiny DVB-T set-top box filled with some rebranded Jianghai. Same PoS as lelon.

Almost everything, including the smallest caps, were bulging. This was like second time in my...
Forum: Announcements & Related News 07-26-2021, 09:25 AM
Replies: 2
Views: 418
Posted By Behemot
Re: Panasonic exits VRLA market

What does the photo say?

I write exactly that in there, chinese're flooding markets, pretty much as with everything else.
Forum: Announcements & Related News 07-26-2021, 07:43 AM
Replies: 2
Views: 418
Posted By Behemot
Panasonic exits VRLA market

You guys may be interested in this - Panasonic is abandoning the lead-acid market for good. So now only Yuasa remains.

https://www.hardwareinsights.com/panasonic-exits-vrla-market/
Forum: Troubleshooting Computer Displays 07-17-2021, 07:08 AM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

That other heatsink, Q601 and per the marking system, IC601. If there is no short after removing the rectifier, replace that with a good one and check it with incandescent light bulb connected in...
Forum: Troubleshooting Computer Displays 07-13-2021, 03:21 PM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

Capacitor does not seem to have any problem, you've just discharged it via short. If it was plugged in the grid during that, than surely fuse and the bridge rectifier BD601 went out if you measure it...
Forum: Troubleshooting Computer Displays 07-12-2021, 09:15 PM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

That's usually the case. If the pins are not labeled, you can always find datasheet for the inverter driver and have a look which pins are what.
Forum: Troubleshooting Power Supplies and Power Supply Design 07-08-2021, 03:27 PM
Replies: 3,146
Views: 978,752
Posted By Behemot
Re: Power supply build quality pictorial. part 2

V series is quite nice, I've reviewed different models yeaaaars ago on HWI, looks like you haven't read:spank: Last was V650 https://www.hardwareinsights.com/cooler-master-v650-fully-modular-review/...
Forum: Troubleshooting Computer Displays 07-07-2021, 06:51 PM
Replies: 141
Views: 65,370
Posted By Behemot
Forum: Troubleshooting Computer Displays 07-05-2021, 06:02 AM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

That's correct, ~230 V AC times square root of 2 equals to a bout 325 V. Where would DC appear from on the transformer? Since when can transformer transform direct current? A switch (usually...
Forum: Troubleshooting Computer Displays 07-02-2021, 07:41 PM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

If you mean main transformer secondary, there's AC coming from it, you can measure DC after rectifier, preferably on a capacitor.

What would be a sine wave doing there? :)
Forum: Troubleshooting Computer Displays 06-25-2021, 05:25 AM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

Me thinks the upper two which you selected are for the two components on the left side. For those two in the right side also the right two numbers apply. That would be JR2 and R613 I guess.
Forum: Troubleshooting Computer Displays 05-27-2021, 07:58 PM
Replies: 141
Views: 65,370
Posted By Behemot
Re: Dell 2007FPB teardown

Many 20" displays do have such thick diff plastic and 6 tubes.
Forum: Troubleshooting Power Supplies and Power Supply Design 04-10-2021, 04:44 PM
Replies: 9
Views: 2,487
Posted By Behemot
Re: Question about SS-400ET

orly (http://www.hwworld.cz/index.php?option=com_content&view=article&id=64:capacitor-stock-overview&catid=7:kondenzatory&Itemid=102)
Forum: Troubleshooting Power Supplies and Power Supply Design 04-08-2021, 02:32 PM
Replies: 9
Views: 2,487
Posted By Behemot
Re: Question about SS-400ET

your capacitor choice is awkward at the very best
Forum: Announcements & Related News 03-19-2021, 02:48 PM
Replies: 35
Views: 11,402
Posted By Behemot
Re: Database of UPS inverter output waveforms @ HWI

HP T750 G2, Eurocase EA620 and Riello NDG 200 measurements have been added. Hopefully none of that will get lost with more migrations etc. as the Smart-UPS text got :-o
Forum: General Capacitor Questions & Issues 02-26-2021, 01:24 AM
Replies: 4
Views: 2,784
Posted By Behemot
Re: Illinois "PKSM" capacitor

Must be custom than. I took another unit as this one likely has bad CPU or something around the way. This time the one in the usual spot was totally done and couple others were bad too so I'll be...
Forum: Announcements & Related News 02-25-2021, 06:15 PM
Replies: 45
Views: 17,183
Posted By Behemot
Re: New caps on stock

Another larger ones, KZN 3300/50 D18×40 mm.
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