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Cap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM me -
Re: The Hall of Shame - Badcaps Photo Montage
1A/50V was a suggestion. Glass shottkys have a typical current rating of a maximum 200-300mA up to 1A and a typical rating of maximum 100V.
Looking at the schematic and the fact that you have 25V Capacitor nearby, I concluded that the maximum possible voltage would be 25V. Then any 25V and over will do the trick. Also it has to be more than 500mA.
You don't need glass shottkys, glass packages are old design.
It would be better, if you can find schematic. I'm only trying to make educated guess.Last edited by televizora; 04-09-2017, 07:03 AM.Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
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Re: The Hall of Shame - Badcaps Photo Montage
found service manual. D938. References Q654. Also had a diode list but not sure which one it is. I'm a professional computer tech, my exp with circuits is limitedCap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: The Hall of Shame - Badcaps Photo Montage
Page 33 on the schematics, in the "POWER PART", D928 is a 1SS133 diode. A 1N4148 should be a suitable replacement and it's much more common.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: The Hall of Shame - Badcaps Photo Montage
So, I was right....Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
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Re: The Hall of Shame - Badcaps Photo Montage
but the forward fv of the 1N4148 is 1v, where the 1SS133 is 1.2Cap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: The Hall of Shame - Badcaps Photo Montage
200milivolts are not critical.Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
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Re: The Hall of Shame - Badcaps Photo Montage
i have an 30MDF35V capacitor i need identifying. this post is just so i can get priviligies to make my own post
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Re: The Hall of Shame - Badcaps Photo Montage
Badcaps killed HP desktop computer with Intel mobo. On the mobo there were Rubycons - many of which - bulged. Then voltage without filtration and dead vrm..and shorting the chipset...Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
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Re: The Hall of Shame - Badcaps Photo Montage
Here's my own little interesting encounter with faulty caps: two 470uF reservoir caps on an ATX power supply experienced catastrophic failure. The caps were installed by me about an year ago, as this is a refurbished junky 400w Delux PSU and of course it wasn't worth investing in quality caps which might've ended up costing more than 2-3 of these supplies together....looking at the damage, you'd think there's NO WAY the primary is still functional, but it's actually fine - not even the fuse went ! :|The story is even funnier (for an electronics nerd): the guy who tossed it said his daughter freaked out when she heard a loud bang from underneath the desk and saw some smoke coming out of the computer. I thought to myself "Ok, probably a FET shorted and took out the fuse and possibly some or all of the diodes", but then he followed saying he tried plugging the PC back in and ANOTHER pop accompanied by the obligatory magic smoke of course. I was pretty stumped myself at this point and thought maaaaybe someone somehow shunted the fuse or replaced it with one with too great a value in the meantime, but then I took the cover off and saw THIS
The cause of failure was likely some liquid which spilled onto the back of the PC and into the supply, because there were dribbles of coke or perhaps coffee all over the inside of the PSU's case...that combined with the low quality caps resulted in this wonderful effect
Attached FilesLast edited by Dannyx; 04-25-2017, 12:07 PM.Wattevah...Comment
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Re: The Hall of Shame - Badcaps Photo Montage
Don't see any coke or coffee.Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: The Hall of Shame - Badcaps Photo Montage
I do Though you're right, the liquid gathered on the cover of the PSU, because when installed in a PC it normally faces upside down, meaning the board was at the top and cover was at the bottom...some of it might've oozed under the board as well.
Attached FilesWattevah...Comment
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Re: The Hall of Shame - Badcaps Photo Montage
I'd expect that to be electrolyte from the exploded caps.
Which do not seem to ever be replaced when the glue on them has same structure and color and continuity with the glue on the board. Maybe it just appears that way, after all, they usually apply the glue in same spots, but still…Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: The Hall of Shame - Badcaps Photo Montage
Well I repaired many of these exact same PSUs and distinctly remember replacing the large caps on one of them, so I could be mistaking it for that one....you're right, I didn't even notice the glue...either way the damage's been done
Wattevah...Comment
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Re: The Hall of Shame - Badcaps Photo Montage
That looks like what I'd expect to see from a PSU set for 115VAC but plugged in to 230VAC, if there are no MOVs protecting the big caps.PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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Re: The Hall of Shame - Badcaps Photo Montage
This is the first time i've ever seen the electrolytics in a CFL fail...
Brand: ymin
Line: RKFAttached FilesI'm not a expert, I'm just doing my best.Comment
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Re: The Hall of Shame - Badcaps Photo Montage
That's very common. After about a decade of daily use even Rubycon failed. It was still the very longest working CCFL bulb we ever had though.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: The Hall of Shame - Badcaps Photo Montage
I found what looks to be a server of some sort.
I don't see why they threw it out on the curb.
For those who failed to catch on, that was sarcasm.
Poor rubycon capacitor.Attached FilesI'm not a expert, I'm just doing my best.Comment
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Re: The Hall of Shame - Badcaps Photo Montage
Those KZG caps next to then don't look that much better either
The server probably ran pretty hot to cook those Rubycon caps. I've only seen MCZ fail in locations where they were exposed to heat. That bare Intel chipset does typically run quite hot.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Introducing... the POS-124Z which really is a POS:
Yep it's a POS allright.
I tried powering it up. It's a KILLER - not fried, but sure will fry things! I got 21V out of it unloaded according to my DMM!
I tried 21W load (car lamp) - got 16V, which is really pushing that lamp.
Then I tried a 50W load (car headlight) - got 13.2V. Not too bad but this is with the heavy load...except the circuit breaker kept tripping.
So I had to take a peek:
EIEW. Looks like a Darlington emitter follower + Zener device. Heatsinking?... -
While our PSU hall of shame thread is fun I thought It'd be fun to have a ripple hall of shame thread too
I'll go first out, it's an industrial PSU that offers +15v -15v -5v +5v rails.
However it has been mounted on a frame with DC/DC converters for producing +12v and -12v as well.
The caps for this have gone a bit high ESR
The measured ripple is around 1700mV, or 1.7v!
After recapping the ripple is gone, also note that the scale on the scope is 50mV/div instead of 500mV per div in this shot
-And that's how you know you have a qualifying... -
Hi any suggestion would really help.
I have Hp Envy X360 13 which is AMD.
Model : 13-ar0005AU
motherboard No : 18740-1.
Problem : can't turn on.
After inspecting the motherboard, I discovered that one of the hall sensors was broken. Can't find the schematic for this board, so not sure about this SMD device number.
Does anyone know the serial number of this LID Switch? -
Back in 2020 i bought a (2nd hand) compact ATX psu to replace my current one. My PC case only fits very short ATX power supplies so i didn't really have the choice of buying a decent 80Plus unit. The current unit is a modded YoungYear unit that i made a thread about a while ago:
A "nice" YoungYear unit? - Badcaps
The "new" unit is a KDM-M6480 480W psu, the 480W number is a typical KDM bullshit claim of course, but the 24A rating on the 12V rail seemed reasonable and the "Active PFC" claim gave me a bit of hope that this was going to be decent-ish....
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