Solved Ashida Build: no 3.3 volts

[Cis]

Hi,

I'm currently working on my first Wii portable. This is an ashida. I have installed everything so far and wanted to test it now. Unfortunately, I can't get 3.3 volts out of the PMS-2. With all other voltages I get the correct voltage. With the 3.3 volts I only get 0.38 volts when I measure. Before I put everything together, I of course checked whether the Wii was still working after cutting it out, and I still got all the correct voltages there.

Could it be that I just have a short somewhere?

Or do I have to buy a new PMS-2?



Many thanks in advance.
Love the work you guys are doing here

 

[LetsGamingDE]

To your issue: 0.38 V on the 3.3 V line usually screams "short" or "heavy load" to me. The PMS-2 is generally reliable, so before you toss it into the pile of broken dreams, here's what I'd check:

1. Continuity test between 3.3 V and GND – if you get a beep, congrats, you've got a short somewhere.
2. Check resistance across 3.3 V to GND with power off. If you're reading something super low (like under 10 ohms), yeah… that line's not happy.
3. Look for solder blobs, bridges, or a rogue wire doing parkour across pads it shouldn’t.
4. If you’ve got any components like regulators or filters on the 3.3 V rail, make sure none of them are cooked.

If all else fails, disconnect stuff from 3.3 V one by one and keep measuring. Could be one component dragging it down.
Replacing the PMS-2 should be a last resort, chances are the fault isn’t in the PMS but somewhere downstream.

Good luck, and let us know what you find.

 

[Cis]

To your issue: 0.38 V on the 3.3 V line usually screams "short" or "heavy load" to me. The PMS-2 is generally reliable, so before you toss it into the pile of broken dreams, here's what I'd check:

1. Continuity test between 3.3 V and GND – if you get a beep, congrats, you've got a short somewhere.
2. Check resistance across 3.3 V to GND with power off. If you're reading something super low (like under 10 ohms), yeah… that line's not happy.
3. Look for solder blobs, bridges, or a rogue wire doing parkour across pads it shouldn’t.
4. If you’ve got any components like regulators or filters on the 3.3 V rail, make sure none of them are cooked.

If all else fails, disconnect stuff from 3.3 V one by one and keep measuring. Could be one component dragging it down.
Replacing the PMS-2 should be a last resort, chances are the fault isn’t in the PMS but somewhere downstream.

Good luck, and let us know what you find.

Thanks. I fixed it. I got a short on the driver board.