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| Thread ID: 98367 | 2009-03-22 07:12:00 | Capacitors & motherboards | Phil B (648) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 758513 | 2009-03-22 07:12:00 | My old AMD2000 work computer has been throwing wobblies of late, so I took it apart for inspection & found I've got a MB with a capacitor that's bulging. I'm looking at changing them all. The question is. 1) Does it matter if the voltage is higher than the original part? My thinking is, if the old part failed cos it overheated, then putting a higher voltage component in it's place will reduce the stress the component is under & therefore reduce heat. I want to keep the component physical size the same. I've looked at RS components etc & found I can up the voltage a bit. I'm going to use the highest temp rated parts I can find (105 deg+) 2) Does the ripple have any effect? 3) I have a little electronic knowledge & I mean a little :) |
Phil B (648) | ||
| 758514 | 2009-03-22 07:28:00 | Would replacing the motherboard with a new one, suing solid state capacitors be an option? | pantera989 (14533) | ||
| 758515 | 2009-03-22 07:30:00 | If I could find one, maybe. I'm browsing for one now. If I fix the board it means I don't have to install windows again too | Phil B (648) | ||
| 758516 | 2009-03-22 07:56:00 | I would try and fix the board, but put aside the cash to replace it if the fix goes bad. as for the correct part: higher voltage is good, the rated voltage is just a maximum. higher capacity is ok, as long as its with in about 20%. lower voltage is bad, lower capacity is very bad. do some googling , there are good set-by-step articles on doing this. |
robsonde (120) | ||
| 758517 | 2009-03-22 08:01:00 | Thanks Rob. Any idea of the effect of ripple? I know what it does. I want to to know if it would make it better if I used the lowest ripple possible or am I just wasting money buying top end parts | Phil B (648) | ||
| 758518 | 2009-03-22 08:05:00 | The capacitors go awry because they are past their use-by date, or maybe they were a bad batch from new, a higher voltage rating won't "ease the strain'. "Solid state" capacitors? ? Maybe Solid capacitors, but possibly overkill for a non life-support PC. Depending on the function the capacitor is performing, changing the capacitance may not cause too much strife, but if it is a timing capacitor, stay with the original value and type. Electrolytic capacitors (the bulgeable ones) have a rather startling tolerance - varying 30% is highly accurate. Higher temp. ratings are good. RS are not noted for their keen pricing BTW. Have fun |
R2x1 (4628) | ||
| 758519 | 2009-03-22 08:13:00 | Adding another 2 cents worth :) It's low ESR (equivalent series resistance) capacitors that you absolutely need on a mother board. The ripple is high so you need electrolytics with low 'resistance' electrolyte. Go here http://www.jaycar.co.nz and search capacitors - low ESR. |
Terry Porritt (14) | ||
| 758520 | 2009-03-22 08:30:00 | I've never bought anything from rs. It's just a good place to look. I had a look at jaycar's site earlier & couldn't find 1200uf 10v on it. That's the one that's bloated. But I'll keep looking. At least I'm on the right track Thanks |
Phil B (648) | ||
| 758521 | 2009-03-22 08:54:00 | From Jaycar, try cat # RE-6304, or RE-6306 they are 1,000uF and 2,200uF respectively. Both rated 10V, low ESR and dimensions 10dx16h, 105 C rated, vertical PCB mount. - - $0.74 & $1.30 Price indicates the former, performance may be better with the latter. |
R2x1 (4628) | ||
| 758522 | 2009-03-22 09:07:00 | Would 2200uf be ok? That's 1000 more than original | Phil B (648) | ||
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