Snayperskaya
Member
Last Activity: 02-10-2020, 12:10 PM
Joined: 11-10-2015
Location: N/A
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Weird outer shell markings/corrosion (?) on polymer caps
Just saw this on another forum. On some caps it looks like a plastic coating is peeling/falling apart.
Does anyone knows what's up with those caps?... -
Re: Swapping japanese/generic electrolythics with solid-states
Thanks again for all the nice info. I really appreciate it.
What should I look into when choosing solids over electrolythics? Are they all (or mostly) high-ripple/low ESR? Is it safe to go for same voltage/capacitance as the original 'lythic or is there anything else I should look into the spec sheets? -
Re: Swapping japanese/generic electrolythics with solid-states
Nice, thanks everyone for all the input
I didn't know you could populate open caps slots on those motherboards. I have some other motherboards with incomplete VRM phases left completely unpopulated (caps, inductor and ICs). I assume you can't do that on those?
Quality caps here are pretty hard to come by. I've asked several sellers, but only one answered me with the following (I quoted for the original specs):
1000uF @ 16V: NCC KZG (yes, and they seem new/unused)
1500uF...Last edited by Snayperskaya; 09-01-2018, 04:29 PM.Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
My tester is one of the transistor multitesters, just like this one:
[url]https://ae01.alicdn.com/kf/HTB19WaqNVXXXXapXFXXq6xXFXXXx/T7-Novo-Transistor-Tester-Diode-Triode-Capacit-ncia-TFT-Medidor-de-ESR-LCR-meter-NPN-PNP.jpg[/url]
Not sure if it can handle precise readings of milliohms.
Also, I've tried searching for FL series datasheet, but no dice. Even on the local repository by a forum user I couldn't find it. Is it a low or a ultra low ESR series?Re: Swapping japanese/genericLast edited by Snayperskaya; 08-31-2018, 06:00 PM.Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
Updating the topic:
I've got a good desoldering tool now and I'm ready for changing the caps on the Asus (reattached picture for reference).
Marked caps: KZG (820uf @ 6.3V) (I've removed all of them already)
VRM near I/O are Panasonic FL (1000uF @ 16V).
VRM near CPU socket are Rubycon MBZ (1500uF @ 6.3V).
I've removed one of each for testing on my LCR and got the following:
MBZ: 1317 uF, 2% VLOSS, 0.06 ohms ESR
FL: 945 uF, 1.4% VLOSS, 0.07...Leave a comment:
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Re: Asus crosshair IV(4) formula
Have you tried emailing ASUS tech? They might help you with a schematic.Leave a comment:
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Re: Help out a noob at motherboard repair
I got another PSU (a Corsair HX750, brand new). When I first powered it up, it worked OK. But when I tested it the following day, the same symptoms appeared.Leave a comment:
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Re: Help out a noob at motherboard repair
Not yet. But I've tried other boards with full power consumption (2x X5690, 12 modules of RAM) and it ran just fine....Leave a comment:
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Help out a noob at motherboard repair
So, I've started [URL="https://www.badcaps.net/forum/showthread.php?t=68666"]another thread[/URL] about changing caps, but as some users posted the problem of one of those boards (the Tyan) may not lie on the caps themselves.
The symptoms the board is showing are the following:
* When I try to use 2x X5690 (130W TDP), the board power gets cut while in POST and it refuses to power up after it. I need to disconnect power, force a "power flush" (pressing the power on while PSU is disconnected) just for the whole thing to loop.
* I tested...Last edited by Snayperskaya; 05-29-2018, 10:37 AM. -
Re: Swapping japanese/generic electrolythics with solid-states
Thanks. I'm inclined to replace the KYs since I've seen one with a bulged "plug"....Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
Got one more board for cap replacing - actually it just came back from a repair lab, asked how much just to have the caps changed would cost me and they told me the job would be ~US$250 (about twice I paid on the board) and I'd like to hear suggestions on which caps to choose since I'm going to buy them all and start swapping from the easiest boards first (this one have a lot of SMDs on the back pretty close to the caps terminals). I've circled the different caps in different colors for easier reading since the picture...Leave a comment:
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Re: Paxville or Bust! The Supermicro X6DA8 Project
Pretty nice to see old server-grade still kicking. But I can't help and be nervous when I see a pile of boards stacked up without an ESD bag. HahahaLeave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
You're right! I've even marked it with a sharpie but forgot to red-circle it....Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
Thanks for the tips. The green PCB is the Intel one, it's a server board that handles quite some load into it. I haven't seen any bulged (top) on it, just some sizzling. The board operates OK, I just want to recap BEFORE anything goes bad since I've heard the sizzling noise when using high power CPUs.
Thanks. So I should go for a full recap on the Asus. I'll check the specs on the VRM caps (Rubys next to the CPU side, Panas to the IO side) later. What bothered me...Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
I've checked (eye only) two boards ATM:
ASUS A8V:
NCC KZG:
15x 820uF @ 6.3V
INTEL S5520HC:
NICHICON:
10x 470uf @ 10V
NCC KMG:
2X 470uF @ 16V
Apparently the failed/failing caps aren't responsible for the VRM. The Asus have some Panasonic and Rubycons there while the Intel have polymers.
The Asus got some bulged ones (so I think replacing all of them would be wiser) and the Intel have caps sizzling...Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
Thanks, but I'd like to have a superior model, actually. I'd rather pay a little more into quality/lifespan....Leave a comment:
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Re: Swapping japanese/generic electrolythics with solid-states
I've got another board with faulty NCC KZGs... What would be my best choice for replacing those?Leave a comment:
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Re: google bitches
Firefox ESR is way to go - compatible with legacy addons and updated for security.
[url]https://ftp.mozilla.org/pub/firefox/releases/52.7.3esr/[/url]Re: google bitches<br /> <br /> Fi....7.3esr/[/url]Leave a comment:
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Swapping japanese/generic electrolythics with solid-states
Would it have any bad consequences, considering both to be of the same ESR rating, size and capacitance? On overall circuits, not only motherboards and VGAs. -
Re: Average lifetime of your discrete video cards?
I had a Radeon HD 4870 1GB (Sapphire) that I used from 2009 to 2011, sold it to a friend that used it till 2014 (IIRC). Bought it back, cleaned it and resold it. It is prolly still running strong.Leave a comment:
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