Hi, >Do the original fans have speed sensors? There were several different versions of this. Some fans have an OK signal, some give a pulse once per rev. Did the original fans have 3 wires?
Yes, I put them down as +12V, GND, Pulse. Original fan: http://f0p.co.uk/AS4100original.JPG Replacement: http://f0p.co.uk/AS4100replacement.JPG I'm guessing the original was slightly more 'special' than the replacement which is just a cooling fan... Cheers Adrian On 20 July 2015 at 16:17, Jon Elson <[email protected]> wrote: > On 07/20/2015 09:23 AM, Adrian Graham wrote: > >> Folks, >> >> I didn't realise there'd been a clasiccmp server meltdown, wondered why I >> wasn't getting mails :) >> >> We still have a few AS4100s out there in the field and CPU fans are >> becoming scarce, so being canny we sourced some *almost* identical >> replacements to no avail. >> >> Original spec for the fan is 12V 0.17A, our replacements are 12V 0.18A and >> the console still reports them as failed. I've sanity checked by using a >> processor board with a good fan and still nothing. Could the 0.01A cause >> THAT much of an issue? The wiring is a good 3" longer too but I didn't >> think that would cause problems either. >> >> >> Do the original fans have speed sensors? There were several different > versions of this. Some fans have an OK signal, some give a pulse once per > rev. Did the original fans have 3 wires? > > Jon > -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk
