On Apr 24, 2009, at 5:37 PM, insightinmind wrote:
> When my partner's PC power supply / fan went bad, we replaced the > entire power supply as a unit. It was safer to do that. You're trying > to replace that one? the one that is inside the psu? > > I believe there is also a capacitor inside the psu that holds a > dangerous charge even after the psu is unplugged ... do not know > anything at all about it, but that's why there's a "Danger" sticker > on the psu. The dc bus inside the PSU is 325 volts. There aren't a lot of safety features within the PSU itself as it is not considered to be a repairable unit. It isn't even intended to be repaired by anyone outside of the original manufacturer. However ... Someone who exercises appropriate caution can replace the fan with an identical one (unavailable as a repair part) or one which is nearly identical (which can be determined by a physical inspection, once the PSU is apart). Most fans are connected to the PSU's internal 12 volt bus through a small Molex (or similar) connector. The replacement fan is spliced to the remnants of the old fan's connector, and the replacement is installed as the original fan was. That's the best which can be done under the circumstances. As you can, with caution, disconnect the failed fan, apply the connector to the replacement fan, and install the replacement fan without coming into contact with the 325 volt bus, such a repair is quite feasible. I have replaced several Apple PSU fans in that way, and the results were good. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
