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#1 |
CapXon Be Gone
Join Date: Sep 2011
City & State: Idaho
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 3,216
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![]() This is the first time that I've seen an Panasonic cap fail that wasn't installed backwards (at least that I can remember).
It's a 1800µF 6.3V part. It's from a Dell Optiplex 780 SFF from 2010. CPU is a Core 2 Duo E8500 3.16GHz. It was a point of sales machine at a car dealership and was NEVER off! It was on a UPS, and had 82,156 hours on it when I got it. It had never been cleaned, never had the thermal paste replaced. The thing literally just worked for 10 years. It's a cool machine because it's one of the highest end Core 2 Duo CPUs with DDR3 RAM ![]() I got the machine in August 2020. I took it apart and saw that the board had 9 KZG caps on the board, none looked bulged. I took apart the PSU (total PITA, by the way) and saw a bulged CapXon. After taking apart the power supply, I discovered that there was only the one 2200µF 16V CapXon GF for all of the 12V rail filtering. I'm guessing after that bulged, the 12V ripple was really high. I replaced all of the KZG on the board and did a full recap on the PSU (including the primary cap!) and replaced the thermal paste on the CPU and Northbridge heatsink. I instantly started using the machine as a Plex media player in August 2020. I set it up to run 24/7. The original GPU fan on the ATi video card failed in December 2020 and I replaced it. At that point, the cap was still good. I shut down the computer to move in June 2021 and I noticed that the cap was failed. So at the minimum, it still ran for 85,0000 hours in a small low airflow case directly in line of CPU exhaust heat. Not bad! The same size/series caps next to it tested perfectly in spec. I was worried at first that the PSU didn't like my recap and was outputting high ripple but it makes more sense that it just had a long stressful life. Here is a picture after I recapped it so you can have a good idea of where the cap was: |
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#2 |
CapXon Be Gone
Join Date: Sep 2011
City & State: Idaho
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 3,216
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![]() Here you can see the PSU before it was recapped or cleaned. You can see that failed CapXon in there:
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#3 |
Badcaps Veteran
Join Date: Apr 2005
Posts: 1,560
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![]() The FL was near the HSF outflow side, about the hottest location in any SFF - no surprise that it failed. However, all the Rubycons (MBZ?) near it seem to be fine - as expected.
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#4 |
Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 26,456
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![]() those compact things are terrible, you should have gone full-polymer
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#5 | |
CapXon Be Gone
Join Date: Sep 2011
City & State: Idaho
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 3,216
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![]() Quote:
Even all of the small caps? I replaced the 1800µF 6.3V Panasonic FL with 2200µF 6.3V Rubycon ZLQ. |
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#6 |
Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 26,456
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![]() the small caps may be audio - you can use tants for that anyway.
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#7 |
CapXon Be Gone
Join Date: Sep 2011
City & State: Idaho
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 3,216
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![]() I replaced all the KZG with polymer at least. I think it will last a long time. If I need to replace some more caps on the board later, that's fine. I just don't want to have to work on that PSU ever again... lol
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#8 |
CapXon Be Gone
Join Date: Sep 2011
City & State: Idaho
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 3,216
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#9 |
Super Moderator
Join Date: Jul 2005
City & State: ----
My Country: Sweden
Line Voltage: 230v 50Hz
I'm a: Knowledge Seeker
Posts: 5,070
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![]() Wow, you can hardly tell it is the same PSU as in the earlier pictures! Nice work!
__________________
"The one who says it cannot be done should never interrupt the one who is doing it." |
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#10 |
Badcaps Veteran
Join Date: Oct 2009
City & State: Thessaloniki, Greece
My Country: Greece
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 2,137
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![]() Welcome back P4!
Excellent work like the good old days |
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#11 | |
The Boss Stooge
Join Date: Oct 2003
City & State: Salem, MO
My Country: United States
Line Voltage: 240V @ 60Hz
I'm a: Professional Tech
Posts: 15,009
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![]() Quote:
Nice job on the refurb! I love seeing this versus it being scrapped!
__________________
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#12 | ||
master hoarder
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 10,862
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![]() Quote:
Even Panny FL can take only a finite amount of use/abuse before they fail. Now I can't recall if this was with FJS or FL series, but I also had a Panasonic cap bulge on me after storing a machine for a while. It was actually the Pegatron M2N78-LA motherboard from an HP Pavilion p6247c PC, shown in this thread: https://www.badcaps.net/forum/showthread.php?t=90727 ^ Basically, I haven't posted an update on that thread, but I pulled out that system in September of this year to use it for testing some hardware... and that's when I noticed I had a bulged cap next to the CPU. I last posted in that thread at the end of 2020... so looks like the cap bulged somewhere in between the 9 months or so in storage. It's an HP, though, so no surprise. ![]() So yeah... high ripple current for long enough time will break down even the good Japanese brands. Quote:
If we didn't know Pentium4 any better, we could certainly say this was fake and he just pulled a new PSU on us. ![]() ![]() Last edited by momaka; 01-18-2022 at 11:20 PM.. |
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#13 | ||
CapXon Be Gone
Join Date: Sep 2011
City & State: Idaho
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 3,216
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![]() Quote:
![]() Thanks! Yes, I have some things to work on and post. Maybe even some updates of past projects. Quote:
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#14 |
recapping PCB.
Join Date: Jul 2013
City & State: Gerona
My Country: España
Line Voltage: 230VAC 49Hz, 2 Ph
I'm a: Hobbyist Tech
Posts: 183
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![]() Surely it has failed due to the heat, I would add a fan to keep the chipset and the capacitors that are nearby cool.
How many hours does the hard drive currently have? Out of curiosity. I have a 500GB Seagate 7200.14 series and it already has 78,000h XD.
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Gaming pc: ![]() HTPC (in construction): Intel core i5 8400, Intel SSD 256GB, nvidia gt1030, asus b365-a. Workshop PC: Intel i5 9400t, 16GB DDR4, SSD 256GB Samsung. |
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