Re: 4-pin pwm fan.
- From: Ian Malcolm <valid.address.in.signature@xxxxxxxxxxxxxxx>
- Date: Thu, 31 Jan 2008 20:45:38 +0000
mrdarrett@xxxxxxxxx wrote:
On Jan 31, 5:17 am, Baron <baron.nos...@xxxxxxxxxxxxxxxxxxxxxx> wrote:If you experiment with adding a diode in the line you cut with the cathode towards the motherboard, Your resistor to ground (on the fan side of the diode) should set the minimum fan speed but the motherboard could still increase it as required. If you've got a fan extension cable spare you could butcher, I'd splice neatly and heatshrink sleeve the cut wire and make up the kludge as a plug in unit, (avoid hassle if it ever needs to go to Dell).
ghost...@xxxxxxxxx wrote:
I've considered the speed fan route, but the machine is most likely
going to spend most of it's time with a logon prompt, which very few
aplications will continue to run on. It'll mainly be used for data
entry and research. To machine itself is pseudo-departmentally owned,
and this seems to be the most reliable technique. I considered using
a resistor on the 12 volt line, but that would require either a three
watt resistor, or 12 quarter watts in parallel (I can get .25W's for
free, but ppl will ask questions if I take that many. It'd be a mess
too). Putting a 2.6k resistor between pwm and ground is the most
sensible (and fastest) way to go, especially since I need this up and
running tommorow; plus at 1/588 watts, it is well within the
tolereance of the available resistor(s). I have tested this approach
thourougly enough to make it final, and all of the variables are well
within range.
I agree with Rich. You don't have the knowledge or skills to repair
this.
I dunno about that. He did after all narrow down the HDD faults to
improper cooling. That's pretty good.
Speak to your supervisor!
That's always a good idea. If s/he is around, that is. Besides, I
don't think having a noisy fan is that big of a problem. Better to
have more cooling.
--
Regards:
Baron.
Michael
--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
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