Topic: Plugging up an AV Famicom in the USA - Need help!

Would anyone happen to know if it's safe to just plug up an AV Famicom in the USA without additional equipment, or is that a bad idea? If it is, what would I need to plug it up safely in the USA?

@ReddMcKnight yeah, you will need a adaptor. They only cost between $2 to $5 on ebay , free delivery with some ( but somethings on ebay do not arrive for 2 months sometimes, maybe try a few places ). The famicim is just a console, not a big hard drive or massive tv, so a small adapter like this will do.just search "japan to usa plug adaptor"

@ReddMcKnight You will need a 120V to 100V step down transformer. The AV Famicom uses very little power (I think it is about 18 Watts) so the 100 Watt ones will definitely be sufficient

People have been using Japanese power supplies for consoles in North America for many decades without issue. They're not all that sensitive to relatively minor variations.

Heck, the Famicom's power supply doesn't even need a switch to select 50 hz or 60 hz mode (Japan's electricity grid strangely isn't universal). So you know right there that it's robust and built to handle some variation.

But if you're concerned you'd be overstressing the original power supply or the Famicom's voltage regulator, it's cheap enough to purchase a replacement PSU. Here's one such source.

https://en.retrogamesupply.com/products/power-supply-for-nint...

Sure makes more sense than buying a step-down transformer. It's significantly cheaper and you're buying a modern power supply built for your mains voltage that outputs at what the AV Famicom expects, replacing an aged power supply that's possibly failure prone and likely drifting off spec at the very least at this point.

And while I don't know about the AV Famicom's power supply in particular, some PSU's for vintage consoles and computers are known to fail from old age in such a way that they send a fatal charge of mains power to the system when they break, destroying internal components. While ideally a fuse will go and protect components like proprietary chips, some platforms like the C64 can fry IC's like the VIC-2 and such when the power supply fails and 120 volts is suddenly fed into it.

So if you're concerned at all, you may as well avoid using the original power supply at this point.

I just use a generic power supply. Though you have to make sure it is in matching spec. (The OUTPUT spec of the PSU)
Nintendo used 10V PSUs, though most are 9, which I hear is okay since it gets regulated down to 5.
However the Amp rating needs to be equal or higher. Also the polarity: the thing on the label with a circle and a line pointing to a + or - sign.
Though to my memory a USA Super NES (NOT NES! The NES PSU is famous as a device to not be used on anything else!) PSU matches spec, the tip didn't fit, and forcing it would probably be a bad thing.