Gamecube Custom Regulator

[GamecubePerson111]

I have been lately trying to run my gamecube off of zenlocs custom regulator (ti regulators). it seems that I am having a voltage drop across the 3.43v line to 0v whenever I connect the regulator to the gamecube. The 1.9v regulator is fine however. I know that this is due to a high current draw or insufficient amperage being supplied but I have tried multiple power sources, including the stock gc one with no luck. I have checked for any bridges on the board and cant seem to find any. Also it is an untrimmed gc motherboard.

Anyone have any ideas? Am I forgetting something important?

 

[kill00man]

Connect your regulator to the cube and let it off. Check with a multimeter for a short between your custom regulator 3.3v line and ground. If there is any, find it and correct it.

If there's no shorcut, please consider that a pth08080w (the linear regulator you certainly used for the 3.3v line) can only handle 2-3 amps and this might not be enough for a rev C and all its stuff. You can try to replace it by the same one as for the 1.9v line : ptr08060w (6amps) or ptr08100w (10 amps). (I'm not sure of the name so please check it before trying )

The original gamecube power brick is enough to power up zenloc's regulator.

Your problem is very likely to be a short. You can also try to power the cube with the original regulator, just to be sure that you haven't fried your cube.

Good luck

 

[GamecubePerson111]

I will definitely order a new regulator or two in that case. Also, how exactly am I able to check for shorts with the multimeter if the gamecube is off?

 

[kill00man]

Well normaly you can set your mulmtimeter as a continuity checker. This allows to test if 2 points on your circuit are "shorted". When your multimeter is in this setting, if both multimeter's fingers touch it will make some noise. Do the same between 3.3V and ground. If there's some noise -> short. If there's no noise -> no short.

 

[GamecubePerson111]

So I should be looking for 0 resistance correct?

 

[kill00man]

Yep that is pretty much the same, just longer to do when you have many traces to check.
If you 0 Ohm betwen 3.3V and ground you have a short.