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Thread ID: 112280	2010-08-30 11:22:00	Motherboard Capacitors	SP8's (9836)	Press F1

Post ID	Timestamp	Content	User
1133154	2010-08-31 03:31:00	RS is pretty cheap and good for capacitors actually, especially as they have free shipping now. Farnell also good but shipping cost is $15 unless you order over $80 so RS is usually always better. The capacitors on the boards are Low-ESR no matter if they are bad brands or not, problem is the bad brands go high ESR quickly and then it doesn't work. If you put normal caps they might work or may not even work at all, since the reason the boards stop working in the first place is because of higher ESR. Note also that general purpose capacitors can't stand the high temperatures, and usually can't handle as much ripple current as the good ones can. All this leads to early failure, there is just no good reason to put general purpose instead of low ESR, especially since series like Panasonic FC\FM are cheap from RS-Components and you get free shipping as well. In fact last time I compared prices with the Samxon from Jaycar, the Samxon cost more, and you had to pay shipping too.	Agent_24 (57)
1133155	2010-08-31 07:19:00	Panasonic FC or FM series from RS is the way to go. Good capacitors, free shipping. Only problem is you have to buy in packs of 5 usually. Jaycar have samxon and (more recently???) suntan capacitors, samxon is a decent brand, probably a lot better than the caps that went bad. Don't know about the suntan caps, I've used them for a bit and they seem fine	forrest44 (754)
1133156	2010-08-31 08:08:00	I think 5 is just the minimum order quantity	Agent_24 (57)
1133157	2010-08-31 09:19:00	Sounds like a challenge! What are they for? A Caliber CA2000D+ D Class mono sub amp for my car 1.25kw @ 1ohm, would love to get it going again.	Alex B (15479)
1133158	2010-08-31 21:27:00	And they wonder why young people are going deaf .... whatever happened to the joy of listening to a crystal set ??? :eek:	SP8's (9836)
1133159	2010-08-31 23:36:00	A Caliber CA2000D+ D Class mono sub amp for my car 1.25kw @ 1ohm, would love to get it going again. What part of the amp are they used in? And what happened to the old capacitors?	Agent_24 (57)
1133160	2010-09-01 00:14:00	Output stage I think, one of them has a raised top.	Alex B (15479)
1133161	2010-09-01 00:24:00	If you put normal caps they might work or may not even work at all, since the reason the boards stop working in the first place is because of higher ESR. assumptions ?? Replacing with normal caps WILL often fix the board-not recommended for critical systems thou. Ive tested some obviously bad caps with a ESR meter (& cap meter) & they can often test OK. Makes it all the stranger. Still , normal caps do work if the board isnt worth putting too much effort into and you have some handy. But you have to buy some, then definitely get good low ESR caps. If you really want a reliable fix, you replace ALL the low ESR caps on that board. Usually not worth the effort. Thats why just using whats handy is OK for a quick SHORT TERM repair to replace just the few bulging caps. The Jaycar "LOW ESR's" Ive tested, certainly werent LOW ESR.	1101 (13337)
1133162	2010-09-01 08:52:00	The Jaycar "LOW ESR's" Ive tested, certainly werent LOW ESR. Bugger! I've used a lot of low ESR caps from Jaycar recently. On a very recent job I noticed that one replaced cap was running very hot, while it's equivalent on an identical board was cool... which kinda supports your statement further (although there may be other components in the chain to blame). Wonder how soon that machine will be back.	Paul.Cov (425)
1133163	2010-09-01 09:09:00	That's why I don't recommend using anything but good brand Low-ESR The bad ones with higher ESR will heat up due to high resistance, the heat will damage them, causing the resistance to get higher, causing more heat to be dissipated.. leading to thermal runaway and quick failure. The MOSFETs in the VRM can also become damaged to due to the high heat as well. Using these kind of capacitors is just not worth it in my opinion.	Agent_24 (57)
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