Badcaps.net Forum
Go Back   Badcaps Forums > Search Forums
Register FAQ Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 9 of 9
Search took 0.00 seconds.
Search: Posts Made By: momaka
Forum: Troubleshooting Power Supplies and Power Supply Design 05-22-2020, 10:52 AM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

Thanks for sharing pictures of your work. Looks really good and great to hear it's still running well. :)

I guess this shows that even an older half-bridge PSU can be useful once recapped with...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-06-2019, 08:20 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

Yeah, that's true - primary caps don't fail often in ATX PSUs with PPFC and no PFC. For APFC units, though... I'd be worried. Also, I've seen a few primary-side CapXon caps fail in hot LCD monitors....
Forum: Troubleshooting Power Supplies and Power Supply Design 02-05-2019, 06:27 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

You got only 470 uF primary caps in that PSU? Ouch! I'd say the PSU is then built more like a 250 Watt unit (though I think we established that already. :D ). Maybe 200 Watt, if the primary caps do...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-31-2019, 10:41 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

No.
Usually 80-100V is where they may start to drop out of regulation. The cheap nasty h-bridgers will try to work regardless, which is the sad part. One I tested at very low line voltage on purpose...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-31-2019, 08:06 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

It's OK to trust it. Just watch out if you get any brown-outs. :D
Many cheaper half-bridge PSUs can't deal too well with low line voltages and can sometimes blow up... possibly taking out something...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-09-2019, 05:49 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

The 3.3V rail shouldn't increase or decrease too much - it is independently regulated with a mag-amp circuit from the 5V rail.


No! Don't touch those resistors. You will likely end up screwing...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-04-2019, 12:42 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

Check your multimeter batteries. Some multimeters, when they get low batteries, they tend to show higher voltage.


Most likely not, even though some of your voltages are outside of ATX spec. But...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-24-2018, 09:02 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

I concur.
That system probably won't peak more than 200W DC load. So it should be okay, indeed.

That said, since the 12V rail did go as high as 12.6V with a load, I'd say keep a good watch on the...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-23-2018, 10:40 PM
Replies: 38
Views: 2,432
Posted By momaka
Re: A "nice" YoungYear unit?

+10

Not uncommon for 45V rectifiers to blow on the 12V rail, unless the 12V rail transformer windings are center-tapped to the 5V rectified output (done on some newer H-bridge PSU designs to...
Showing results 1 to 9 of 9

 
Forum Jump


Badcaps.net Technical Forums 2003 - 2020
Powered by vBulletin ®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 05:49 PM.
Did you find this forum helpful?