Dead Samxon GFs

[Krankshaft]

So I go to a customers house last week and picked up a Gateway LCD monitor that they told me popped and shut off and ever since then it would come on for a few seconds then shut down.

So I open it up and to my suprise there are bulged Samxon GF series caps inside .

I didn't take a picture before removal but heres a pic of the offenders.



So I replace the caps with Panasonic FCs and viola the monitor is back in business.

The fault detection circuit was shutting down the PSU to prevent damage due to the faulty caps.

Now I understand LCD supplies run rather hot but come on this monitor barely made it to one year. And NO it hasn't been run 24/7 for that year either.

Is the GF series just a dud or something?

[Newbie2]

Re: Dead Samxon GFs

See this thread: https://www.badcaps.net/forum/showthread.php?t=4116

Big Pope, who sells SAMXON caps on this forum, says that the GF series is an older series of caps and newer series of SAMXON caps are more reliable than the GF series of caps.

[Topcat]

Re: Dead Samxon GFs

I've seen those dead in the very same LCD monitor inverter. I was also told they're an older series. Also after you recap it, take note of how hot that inverter gets, I think that's also an attribute to the failure.

[kk517]

Re: Dead Samxon GFs

My 21" Gateway monitor stopped working last week.
Thanks to this thread/forum I now know the problem.

Any recommendation of a handy person(in GTA, that's Toronto, Canada) who will replace these caps for under $100?

[Per Hansson]

Re: Dead Samxon GFs

That's a very easy recap job

Single layer PCB, you could ask any TV repair shop or similar to do the job, just make sure they put in caps from one of the 5 major Japanese brands! (so you don't have to go back in 6 months...)

[gonzo0815]

Re: Dead Samxon GFs

just make sure they put in caps from one of the 5 major Japanese brands!

That exactly is the whole problem with the typical TV repair shop. They are using crap caps as they either do not know it better or they just can`t make it economically for a reasonable price.

[Krankshaft]

Re: Dead Samxon GFs

That exactly is the whole problem with the typical TV repair shop. They are using crap caps as they either do not know it better or they just can`t make it economically for a reasonable price.

I think the problem is that they simply go to their distributor or order online and take whatever they have. If its the right uf value and WV its fine.

I personally use Chemicons KMG and KME for general purpose applications and Panasonic FCs for low ESR.

Make sure the caps are replaced with Low ESR 105 C temperature rating caps and not general purpose caps. The Panasonic FC series is a good one and I believe the FCs are a non-aqueous electrolyte unlike the FMs.

Any main brand is fine:

Rubycon
Panasonic
Nippon (United) Chemicon
Nichicon
Samxon

Check out the bad caps sticky thread just to get a feel for the names of the bad ones.

[severach]

Re: Dead Samxon GFs

That exactly is the whole problem with the typical TV repair shop. They are using crap caps as they either do not know it better or they just can`t make it economically for a reasonable price.

You buy them and take them in. Be prepared for the guilt trip for asking them to installed customer supplied parts.