Another Gigabyte with bad Chemicon

[pfrcom]

This pair of KZG 3300uf 6.3v swelling at the top, next to the heatsink on a GA-8SIMLH

Shouldn't have been too hot though, was only a Celeron 2000 running stock standard

Other smaller KZG, further away from the heatsink, show no problems

[pfrcom]

Re: Another Gigabyte with bad Chemicon

Replaced by salvaged Panasonic FJ, verified OK on Dick Smith ESR meter

[c_hegge]

Re: Another Gigabyte with bad Chemicon

Replace the others KZGs. they can fail without showing it.

[PCBONEZ]

Re: Another Gigabyte with bad Chemicon

I don't think KZG need huge amounts of heat to go.
They just tend to go where it's hot first.
And, the older they are the worse they are going to be about it.

[japlytic]

Re: Another Gigabyte with bad Chemicon

Even the best electrolytic capacitors are not immune from failure... the designer must have used capacitors which were good, but not rated for the design.

[c_hegge]

Re: Another Gigabyte with bad Chemicon

No, KZG are failure prone, especially around the CPU area where it is hot. I'd rate them above GSC and Fuhjyyu, but below Teapo and OST.

[i4004]

Re: Another Gigabyte with bad Chemicon

>the designer must have used capacitors which were good, but not rated for the design.
________________________

so what are you suggesting, that such design deserves some other capacitance value, and if so, which one?

if that argumnet doesn't stand, then you have no argument.

ie it's just crappy japanese capacitor crapping out, just like c_hegge said.
heh

(i love the twist where it's not just taiwanese and chinese that are making crappy caps)

[hardwareguy]

Re: Another Gigabyte with bad Chemicon

Treat KZG as an 85C 2000 hr cap....it HATES heat.

[brethin]

Re: Another Gigabyte with bad Chemicon

Even the best electrolytic capacitors are not immune from failure... the designer must have used capacitors which were good, but not rated for the design.

I see alot of good designs destroyed because the guy making the final call wants to save 15c a board and forces the designer to use cheaper parts.

[PCBONEZ]

Re: Another Gigabyte with bad Chemicon

Yup, and you know what.
They probably eat it anyway later on dealing with more RMA's.
.

[c_hegge]

Re: Another Gigabyte with bad Chemicon

Treat KZG as an 85C 2000 hr cap....it HATES heat.

More like 2000hr at 30C!