Antec TPQ-850 Double sided PCB

[c_hegge]

Re: Antec TPQ-850 Double sided PCB

If you're using that delta fan to replace the stock fan, I wouldn't worry about modding the controller. That fan will idle much faster than the stock fan anyway.

[LDSisHere]

Re: Antec TPQ-850 Double sided PCB

Thanks for the feedback, it makes me feel better about leaving it as is, the Delta fan moves quite a bit of air at power up.

[LDSisHere]

Re: Antec TPQ-850 Double sided PCB

I thought I should update this thread since this supply did not work very long before failing again.

After I originally got this supply working I put it in one of my kids computers that should not have been much of a load for this supply. It worked without a problem for about four months then one day it would not turn on the PC. No bang or smoke just a quiet death. At that time, I was sick of this supply after all the time and money I spent on it for it to die so quickly. I tossed it aside where it sat until recently.

I finally decided to see how bad the damage actually was and I was surprised to find only one FET had gone bad. The first attached picture shows the original factory FET and the second picture is what I used as a replacement that only lasted a few months. In case anyone is wondering, the replacement FET was bought new from DigiKey.

I am not sure what exactly killed the FET but I figured it was either one of a combination of heat, voltage or current. Even though the FET is a full pack the factory had it on a sill pad so in my initial repair I just followed suit. This time, in case heat was an issue and since the sill pad was there and could be used I went with an exposed tab replacement in hopes of better heat dissipation. I also bought two different FETs to try as replacements. The one I am trying first is a 8A 900V FET (FQP9N90C) in case the voltage level was the problem. My back up is a 9.5A 800V FET (GP1M010A080H), but I am hoping I will not have to use it. If I do have to use it, I will also mod the fan speed while I am in there to increase the airflow.

This supply will now be used in what will be my new workbench PC, which is a Core2 Duo machine with a GTS 250 video card. This should be a cakewalk for this supply so it will hopefully work for longer than four months this time.