120V power adapter connected to 220V
I plugged in my power supply without the voltage adapter, so it blew. I've already replaced the fuse with a 2.5A 392 fuse and a V7271U varistor. The Wii still won't turn on. I measured the 12V output, and it reads between 7V and 9V. Do you know where I should check to find the possible problem?
Thanks in advance.
update1: thank @dan0 for the response. Unfortunately, I can't test the Wii on its own, since I don't have another power adapter right now, but I'll try to get one. However, the voltage readings I took were from the power adapter itself, at the 12V output.
I've attached the images.
This is a general view of the transformer with the integrated circuits I mentioned earlier already replaced.
There's the fuse and the varistor that were replaced after they burned out.
Measure the output voltage at these two points: at the cable connector that connects to the Wii, and at the cable output from the motherboard.
Thank you very much for your help
update 2:
here are the images
thanks!
Ist dies eine gute Frage?
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5 Kommentare
Thanks for the pictures and update! Nothing seems to be damaged. How is the soldering under the board? If it's possible to get another one, then we know for sure where the issue is (PSU or Wii). Thanks!
von koppie007
Thanks for the 2nd update! I can see some board damage on both photo’s on the left side near the cord. Also a pad seems to be damaged there. Is that correct?? If so, the solder pads need to be repaired. Do you have the tools to do this? Thanks!
von koppie007
Yeah, I think so. I have a heat gun and a soldering iron. Even though I measured those traces with the multimeter and they showed the correct voltage, could they still be causing the problem?
von Ryuukilin
Hmm, as long as it’s al making contact, it should not give issues. I’m afraid the best way is to test with another 220V adapter. This will tell us for sure where the issue is. Sorry
von koppie007
If you can disconnect the output wires from the power supply that connect to Wii, temporarily connect a battery with the appropriate voltage to wiring and see if Wii runs. Usually power supplies absorb the power surge and blow an internal fuse or damage the rectification circuit. I don't see diodes (4) for a full wave ac to dc conversion so this may be a switched power supply using a power transistor. A blown pt may not show visible damage. However, if you can apply power to Wii from another power source and it runs, this will verify Wii operation. Whether you can repair the power supply or replace it depends on your skills.
von F Dryer