Forum: Troubleshooting Power Supplies and Power Supply Design
Yesterday, 09:00 PM
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Replies: 9
Views: 101
Re: Moding a 120vAC smps to work with 220vAC
That wouldn't work.
Remember, 230V AC line peaks at +/- 325V DC (230 x sqrt[2]).
So by converting to half-wave, you would still get 325V peaks, but only on the positive or negative side of the...
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Forum: Troubleshooting Power Supplies and Power Supply Design
Yesterday, 08:19 PM
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Replies: 15
Views: 432
Re: 1300W PSU - Help with replacement mosfet
Check the primary input electrolytic caps too. Usually blown APFC components is a result of the primary caps going either short-circuit or open-circuit / low capacitance. Not uncommon for these to go...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Yesterday, 07:19 PM
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Replies: 9
Views: 6,357
Re: Need ASUS Capacitor KZG 16v 1000uf
Those should work too. But just keep in mind Nichicon no longer makes the HM, HN, or HZ series. So anything you find on those will be NOS (new old stock.) If these are over 5-8 years old in storage,...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Yesterday, 07:16 PM
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Replies: 31
Views: 4,798
Re: Gigabyte EP43-UD3L stuck in POST
Well, don't chuck them in the trash. Some of these old GPUs' value will increase in time as they get more rare, even if they are low end. Also, low-end for current gen could be top-of-the-line for...
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-26-2021, 11:33 PM
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Replies: 2
Views: 123
Re: Ultra 350w ATX Power Supply
Looks like a Young-Year PSU (and probably is, since Ultra did use that OEM for some of their modular series, if I remember.) Though, it could also be (and likely is) a WinTech, judging by the "WIN"...
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Forum: General Computer & Tech Discussion
02-26-2021, 10:27 PM
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Replies: 22
Views: 2,288
Re: Topcat's Other Misc Weird Build Thread
Man that sucks for sure!
Yeah, I was about to say, wouldn't it be possible to still sell the system without the touch screen?
If there was no non-touch version, I probably would have attempted...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
02-26-2021, 10:04 PM
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Replies: 31
Views: 4,798
Re: Gigabyte EP43-UD3L stuck in POST
Is this board powered from the Antec PSU you just posted about recently with bad 5VSB? If so, maybe the PSU just has more bad caps. Also, being an Intel board... any chance you are running a stock...
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-25-2021, 11:11 PM
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Replies: 8
Views: 279
Re: Modding Two PSUs to Output 12V
Yeah, when working on PSUs - be it modding or just probing voltages - always have it plugged in to a series current/power limiting device, such as an incandescent light bulb or two (or a more...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
02-25-2021, 09:39 PM
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Replies: 27
Views: 1,339
Re: junky Jetway P4MDPT board
Yeah, monitor PSUs use flyback topology, so caps with high ripple current specs would be desirable. Probably better to slip in a few more Nichicon HD 680 uF in there in place of some of the VYs, as...
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Forum: General Computer & Tech Discussion
02-25-2021, 09:24 PM
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Replies: 71
Views: 7,282
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Forum: General Computer & Tech Discussion
02-25-2021, 09:08 PM
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Replies: 22
Views: 2,288
Re: Topcat's Other Misc Weird Build Thread
Wow, that looks pretty bad. Perhaps this was in a basement or some other low area that got flooded? The "water line" on the corroded base seems to indicate so... though it could also have been a...
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Forum: General Electronics Technical Discussion
02-25-2021, 03:21 AM
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Replies: 12
Views: 492
Re: Drilled motherboards
If the motherboards have an SSD or other storage soldered onto the motherboard (such as tablets and many of the modern ultra-thin laptops), then that's probably the reason why... which is silly,...
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Forum: General Capacitor Questions & Issues
02-25-2021, 02:53 AM
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Replies: 5
Views: 366
Re: Cap availability problems
Rubycon YXJ and ZLH series are also available in that size.
I like the YXJ for entry-level low-ESR, like replacing those Teapo SEK caps. Such entry-level low-ESR caps are usually employed in PSUs...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
02-25-2021, 12:51 AM
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Replies: 9
Views: 6,357
Re: Need ASUS Capacitor KZG 16v 1000uf
For PC motherboard use, no, this wouldn't be a problem.
Those 16V 1000 uF KZG caps are typically used to filter the 12V rail for the CPU VRM. So if yours are somewhat close to the CPU heatsink,...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
02-25-2021, 12:47 AM
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Replies: 3
Views: 292
Re: Asus A7V8X hdd issue
Yup, that's a classic failure mode for KZG, especially those 3300 uF ones: capacity goes through the roof and much higher than the 20% allowable spec. This is a sign that the capacitor electrolyte is...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
02-25-2021, 12:31 AM
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Replies: 2
Views: 1,425
Re: Asus EN8600GT
Are you missing the same two capacitors? If not, please state what other issue(s) you're having with your card.
Also, front and back pictures of your video card would also be very helpful so we...
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-24-2021, 11:36 PM
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Replies: 8
Views: 279
Re: Modding Two PSUs to Output 12V
I hate to be a negative nancy, but I don't think these mods will work too well (if at all), because you're trying to change the voltages a bit too much. The reason I say this is because the main...
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