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[sudburymods]

For the 3.3v if the white wires connect to the mainboard behind the network card it will be the one furthest to the left. If the white wires connect to the right of the network card it will be the one closest to the power supply.

 Having a multimeter makes finding stuff like this lots easier and faster. A multimeter is like $15.

 You will need to cut the grey wire (leave some extra at the plug if you ever need to resolder this wire together) and the end that goes to the fan will connect to your Pot.

[RoboChicken]

QUOTE(GeToChKn @ May 11 2010, 06:10 AM)

Not sure if you're still interested, but here it goes.

The PS3 fans run on a PWM system.  They run at 12V all the time, but the 3rd fan wire sends a small voltage to the fan that actually controls the speed.  You want to cut the 3rd wire from the fan (gray one) and wire it to a power source.  If you send it 3.3V, it will run at full speed ahead captain.  You can find 3.3V coming off the PS3 power supply.  I usually run some resistors inline with it to slow it down some.  This is a very low voltage, so 1/4 watt resistors are fine as we're not messing with the 2.5A 12V, only the small voltage that controls the speed.  Now for some reason, different PS3's and different fans react differently to different voltages and resistors.  I do this fan mod on each PS3 that I fix from the YLOD, but each resistor amount is different for each PS3.  I've had to go anywhere from about 30k to 350k to achieve the same result on different PS3's.  It works great though and most of the systems that I've done this on, don't come back after a YLOD fix as opposed to the ones that I didn't do the fix on.

Thanks for the advice GeToChKn. Here's my attempt with 130K of resistance:



Still loud as hell. If I increase to 140K it's a dramatic drop in airflow, almost too low so for this PS3 I think I'm going to stick with a base of 130K and keep going up 1.5K until it's acceptable (if the customer comes back sick of of the noise)  

[sudburymods]

Ok look at my video here,



 I have complete control over the fan, follow the directions I gave above and use a 200k pot and you can control the speed to what you like. I gave you the answer please use it.

[RoboChicken]

PS3 fan mod tester:

http://www.flickr.com/photos/35465962@N07/4974269799/

Still working on it and adding different resistances for easy checking.

I wish team Xecuter would make a PS3 fan mod kit for us with a pot or maybe a slider to select different resistances. I have one wire from gray wire and one wire from 3.3v pin on mobo meeting at the top of my PS3 on the inside. Before I close the lid, I use my tester for the best resistance values, then solder on what worked best.

If we had an Xecuter solution, I would totally buy. Tons.

QUOTE(sudburymods @ Sep 9 2010, 12:16 PM)

Ok look at my video here,

http://www.youtube.com/watch?v=QLhcAqiflEw

 I have complete control over the fan, follow the directions I gave above and use a 200k pot and you can control the speed to what you like. I gave you the answer please use it.

OK so grey wire to what part of the pot? There's 3 places to solder on a POT. Am I soldering anything else to the other two points on the pot?

Thanks!

[Dark Mod]

anyone have like....diagrams or pinouts for this particular fan upgrade for most of the ps3's including the slim?

[sudburymods]

There are 3 legs on the POT the middle one is the one you have to send the power to. Then use either the left or right leg(does not matter) to send the power to the fan.



This post has been edited by RDC: Sep 10 2010, 06:45 PM

[KillerBug666]

Just an FYI...I designed a PWM controller for this problem; to provide a wide range of speed control without damaging the fan or risking fan stalls.  Unfortunately, I only have my 40GB PS3 to work with...so it seems that my design does not work with every version of the PS3.  GeToChKn modified the design to work on some of the EE systems...all the details are below. (this is still a work in progress)

http://forums.afterdawn.com/t.cfm/f-153/new_fan_fix-865649/

[gAm3 Fr3aQu3]

This thread was VERY helpful for me.

Here's my set-up with a 100k pot installed in the front of my PS3 for easy access and control.

(IMG:http://img98.imageshack.us/img98/2978/16291910100119913773663.jpg)

[Jedah_001]

Hehe great community....Lotta info here.
What ive done? I wired the third grey wire to that 3.3V source mentioned above.
It works but its waaay too loud.

The question is what type of resistor i should place between

3.3V> *Resistor* <Grey Wire

so i can lower the rotation?

How much "K"? How much "A"?

I've asked TV repairman and he said "You should be careful choosing the right one because inappropriate resistor can warm up very fast and eventualy blows up

[relaxxx]

Just adding a resistor doesn't really work, it's a digital pulse signal.

You're running the fan at 100%. If you want to run the fan at 50% I have a simple schematic here:

http://forums.xbox-scene.com/index.php?showtopic=727112

If you want more adjustment than that or add a POT then it gets more complicated and sketchy.

[Jedah_001]

Using 555 timer wiring? Huh thats out of my skills

Well GeToChKn says he managed to fix the problem using a simple resistor..I dont see where's the problem....I just need the spec

Ah well thanks anyway maybe I'll bother one of the local servicers so can make that mod

[pdcam]

Hi All , wanted to share my experience.on a PS3 60 gb
Thermistor , As it gets hot it's resistance goes down.
Adjusting the POT under normal conditions for suitable noise level .
As the system gets hotter under game play the FAN will self adjust due to the thermistor .
It goes faster the hotter the system gets. and the system cools .

It actually balances its self very well.( not changing speed all the time)


Wiring
Cut GREY wire from FAN to Control plug .connected FAN side to a 47K NTC Thermistor (extended the wires and cover joints with shrink wrap or other methods) .other wire of Thermistor connected to 1 leg of a 10K potentiometer(POT). center leg of POT connected to the 3.3v wire from PSU (Splice)
Physical
unscrew the FAN , you can now see the heat producing chips / heat sinks.
I was able to Push the Thermistor wires through the FAN heat sink housing to the area where the fan connects
(shortest route) and left the thermistor flush with the base near the chips , so that if won't foul the fan and close enough to the heat source.
Hot glue gun to Mount the POT at the side of the PSU .
Drilled a 8mm hole in the side to allow access to the POT screw for future adjustment.