hi, i have a switch here with a dead cap on the main board. It's a capxon kf series 470uf 25V. i dont have any of those caps but i do have a 330uf 25V KY cap. should that be good enough? the capxon cap has 1200 ripple and the KY has 865 ripple
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Re: replace capxon with chemicon lower uf?
No, you don't want to go down in capacitance and ripple. For test purposes, it may be okay to use, but not as a long term fix.
See PCBONEZ talk about the above
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Re: replace capxon with chemicon lower uf?
aren't capxon usually over spec'd though? would it be possible to go up on capacitance and ripple, but down in voltage to like 16V? thanks for the useful link!Last edited by CuriousD; 09-13-2012, 01:32 PM.Comment
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Re: replace capxon with chemicon lower uf?
Capxon, no doubt, from all the pictures, stories and my own experience make terrible quality caps. I can't complain too much because all my equipment has come from previous owners discarding them as "not working".
However, the "good" Capxon ones that I removed all test around their stated capacitance value on various multimeters. I don't have an ESR meter so I don't know about ESR values.
So based on my own limited experience and sample size, I would say they are not overspecified.
PS. I keep the "good" ones as test caps.--- begin sig file ---
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Re: replace capxon with chemicon lower uf?
If the input to the switch is 12v or lower, you can use a 16v cap. If not, you need a 25v one.A working TV? How boring!Originally posted by PeteS in CAComment
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Re: replace capxon with chemicon lower uf?
oh okay, so they're just really unreliable
How do I know if the input is 12V or lower? do i look on the specs of the switch's power supply or on the bottom of it? all i can see for input is 100-240VAC?Comment
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Re: replace capxon with chemicon lower uf?
It is a wallwart type supply, right? It plugs in the wall socket, and has an output plug that goes to the switch. In that case, check what it says for "Output". Also, it would be wise to crack it open and check it for bad caps as well.A working TV? How boring!Originally posted by PeteS in CAComment
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Re: replace capxon with chemicon lower uf?
yeah, it takes a regular power cable like for a desktop computer. the power supply in it says "DC Output: +12V===5.0A" So a 16V cap should work on the mainboard? I can post a pic if you want.
Although on the power supply, i think i should do a preventative recap by replacing the capxon's on the secondary that are "good"
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Re: replace capxon with chemicon lower uf?
Thank you very much for the replies
Here's a picture. The red X is the cap that is dead and the one with the red dot is a cap of the same capacitance and voltage that I will also replace. Also gonna replace those brown capxon's cause they probably don't have much life left!Attached FilesComment
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When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
Rubycon YK DataSheet (b... -
Hello.
I have 29inch LG CRT TV,And Yesterday,Whenever I connect AC power cord to power outlet without switch on, I heard a sound like white noise, And When I switched on this CRT TV, It sometime displayed correctly But usually It won't last more than 20 minute and The screen begin to dark and It finally did not display at all for hours..
Today,I dismantled its plastic case and discharged the biggest capacitor(400wv 470uf) which still holds 250 voltage,and I finally detached PCB from cathode-ray tube.
I measured ESR value of most of caps in PCB with MESR-100 and I found that KME(25v... -
I'd like to start out by thanking this forum for providing the info to be able to repair my 15 year old CP1500AVRLCD UPS. Here is all the info I gathered during my trouble-shooting and re-capping.
Like clockwork, I've had to replace the SLA batteries every 4 years. It was about that time and the UPS was acting like it needed new batteries... randomly shutting off with AC present, not being able to charge fully, and poor runtime when AC was removed. So, I replaced the batteries but noticed that it was not charging properly.
I decided to verify that the batteries were... -
Recapping the power supply board for a Samsung 305T monitor, everything is Capxon except 2 Rubycons. I can't find data sheets matching these online, so don't know what ripple numbers, impedence, etc, to look for. There are a few different looking GL series data sheet PDFs, but the listing that matches the capacitance and voltage is a much bigger case size. I've narrowed down selections with lead spacing and case diameter, and what's in stock at Digi-key
1 x Capxon 1000uf35v GL C720(is this a part number or batch number, can't find it anywhere) 105c
1 x Capxon 1000uf35v... -
Normally, I never post repairs this quick after I do them, because… I am usually very slow. But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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