Dedictaed KI Replacement Fan/Wiring

knipple

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Hey All,

I've got a dedicated KI machine, which the original owner took out the fan which blew onto the PCB. I'd like to replace this. What is the best way about this and to wire it to the PSU?

I've heard some people say to use a 12v fan and others a 120v fan. Where could I find one that would hook up correctly to the PSU?

The screw holes are already there so it would be nice to find a matching one, but I could make anything work really...

Attached are some pics of where it was and the power unit I believe(?) i'm supposed to attach it to(?). Thanks! :)
 

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I used a standard 120mm PC case fan. the highest CFM lowest db with no lights. You want a DC fan make sure you don't get an AC one.

if you want it to look original just solder the original wiring to the new fan :D if you don't have the wiring just make your own and use some crimp on fork connectors to hook it to the psu.

i got a fan guard and 2 metal L brackets to finish up the job.
 
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Thanks for your help as always Brood!

I dont see any original wiring in place. I have a spare DC 12V fan looks like I could use.

There is 3 wires coming out of the fan, Yellow, Red, Black. I dont know much about electricity but I assume one is Pos+, one Neg-, and black is ground.

Where exactly would I soldier to? Is that PSU in the picture the correct location? Thanks


*******Update

I am looking at wiring guide and it indeed looks like it goes into that unit, but in the manual it says AC fan??
 
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that fan should work fine

yellow should be 12v, red +5v, and black is ground.

you should only need the red or the yellow hooked up not both. you can solder directly to the fan under the sticker on the frame side or you can just solder it to the existing fan wires.

i don't have a dedicated cab to look at but i'm thinking it originally came with an AC fan and was hooked into the AC inputs at the power supply maybe?

you could always crimp in a 2 pin molex connector there for easier replacement next time the fan fails (which shouldn't be often).
 
Hrm, looks like in the wiring guide, 2 wires are going into that unit that I have in the pic. Everything connected to that unit is with a "U" type connector which has a screw screwed down on it. I'm just terrified I am going to hook it up and something will start to smoke :)
 
those "U" shaped connectors are these:

782745.jpg


standard crimp fork connector

nothing should smoke/start fire as long as there are no exposed wires touching different power supply terminals. and as long as you do it with the machine un-plugged.
 
original fan was a 120V AC, it tied into the same lugs on the power supply as the AC input wires.

I would know... I kept mine all original. lol :)

except for the power supply. I had to replace that when I got that machine..

the fan is essential to cooling the CPU on the main board, make note of where the original fan was mounted at an angle. I guess it dual purpose can cool the hard drive as well, if you're rocking the original 2.5" one. if CF, then you don't have to worry about anything there lol.
 
so i guess you get your choice then.

Cheap way: use the 12v dc fan you have and tie into the +5/+12 on your PSU

or

Couple dollars more: go out and get a 120V AC fan like mecha said and wire it into the 120v inputs

Thanks mecha wasn't sure about this as i'm still looking for my black whale :D
 
I would think AC would be more durable. I still have both original fans in my KI and KI2.
 
Ok,

I'll prob just go with the 12v since Ive got so many spare ones sitting around. Final question, can I attach the crimp fork connector to the yellow 12v line and simply hook it up to an empty spot on the PSU? Thanks for the help so far! :)
 
as long as the empty spot is a +12v line then yes :D

the AC fan is most likely much more durable but i haven't had any issues with mine yet... (it's in my spider-man cab which is my test cab/multi jamma w/e). And it's the Original/dedicated way it was done which is important to many. For now throw in the DC fan and if it bothers you or you want to change it out later it'll be easy as you've done it once already :D
 
Ok, thanks, I will probably move to AC once I can rig a bracket that I feel is nice. For now I will try to find a +12v open slot, fingers crossed! :)

Btw, got my CF drive in there and working, woohoo!
 
I will prob goto an AC fan eventually. I could just pick one up at radioshack or newegg?

Here is a closer pic from the power supply unit, I can see the 12v has 2 connections already on it, so where would I attach the fan too? The connection on the far left and right are both empty, but not labeled anything. Thanks
 

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I will prob goto an AC fan eventually. I could just pick one up at radioshack or newegg?

Here is a closer pic from the power supply unit, I can see the 12v has 2 connections already on it, so where would I attach the fan too? The connection on the far left and right are both empty, but not labeled anything. Thanks

Those screws on the far left and far right are just the screws that hold the terminal strip to the housing.
Connect the fan to the +12 and ground terminals.
 
Ahh gotcha, brain fart ;)

Is it ok to attach other electrical devices with those other things already attached to the 12v connection???
 
Riptor, theres already two fork connectors connected to the +12v connector, should another one be added?
 
Riptor, theres already two fork connectors connected to the +12v connector, should another one be added?

you should be fine, You could cut one of the existing forks off and try and cram 3 wires into 1 fork. or you could splice the new wire with no fork into one of those existing wires via solder or T-tap and female shielded spade crimp.

if you do decide to stack 3 forks in there make sure you tighten it down as tight as you can without stripping out or damaging the power supply.
 
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