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Old 02-16-08   #1 (permalink)
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Default Zalman MFC1 plus issue
So i've got this fan controller right, and it connects to fans through a 3 pin jack, all my normal fans work great on it, but i hooked up a couple of fans that i converted from 4 pin molex to 3 pin (actually only 2 wires used, think this might be the issue), all the 4 fans show leds red or blue on the controller according to speed but the two i hooked up are not, i mean they are controlled fine just not showing anything led wise....
this is the connection btw

and the controller
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Old 02-16-08   #2 (permalink)
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Make sure you haven't got dead LED's. I have exactly the same controller (Silver) and mine work fine.
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Old 02-16-08   #3 (permalink)
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when i connect the other fans to those ports the leds work fine, it's something to do with the wiring i did to get those normal molex fans controlled... i think they'r missing their speed indicator thingy or whatever, as only 2 wires are connected... maybe the third is what indicates the led....
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Old 02-16-08   #4 (permalink)
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Originally Posted by kanman View Post
when i connect the other fans to those ports the leds work fine, it's something to do with the wiring i did to get those normal molex fans controlled... i think they'r missing their speed indicator thingy or whatever, as only 2 wires are connected... maybe the third is what indicates the led....
Most likely...
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Old 02-16-08   #5 (permalink)
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now just need to find a way to go around it or just have the lights on all the time somehow
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Old 02-16-08   #6 (permalink)
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hmm. i have too many fans in my comp. was thinkin of buying these. most if not all my fans have a 3-pin and a molex connector. where did you guys buy it and how much?
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Old 02-17-08   #7 (permalink)
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Just wanted to chime in here,

I got the same controller in black, and none of my fans have a third pin. All my wiring is totally custom, and therefore I removed the pins for ease of use.

None of the LED's work...

So, I think it's safe to say that the LED's are controlled by the fan's third pin... Which I think is ridiculous. Not a big deal to me, since all I wanted was the controller, and not the LED's, but still...
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Old 02-17-08   #8 (permalink)
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Originally Posted by Arcygenical View Post
Just wanted to chime in here,

I got the same controller in black, and none of my fans have a third pin. All my wiring is totally custom, and therefore I removed the pins for ease of use.

None of the LED's work...

So, I think it's safe to say that the LED's are controlled by the fan's third pin... Which I think is ridiculous. Not a big deal to me, since all I wanted was the controller, and not the LED's, but still...
The LED's are indeed controlled by the 3rd pin. Although, most fans are 3pin these days.
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Old 02-17-08   #9 (permalink)
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Originally Posted by Mhill2029 View Post
The LED's are indeed controlled by the 3rd pin. Although, most fans are 3pin these days.
But I don't see how that makes any sense... If the controller limits voltage, I think it would make better sense to check the output of the rheostat circuit, than to check the output of the fan tachometer... Like the Sunbeam controller, which I feel is a better unit all around (just not as good looking/compact).
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Old 02-17-08   #10 (permalink)
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I also have this controller. I was wondering if there would be any 'easy' mod i could do to hook up my FM-123 control cables (its 2 pin) to it.
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