Can I correct my stupid mistake? Applied NES PSU to RetorN3!

[Satoshi_Matrix]

Guys I need some advice.

Today I was moving my consoles to a new shelf, rearranging the cables and power supplies. I made the stupid mistake of plugging my NES AC 9v power supply into my RetorN3 NES/SNES/Genesis famiclone and turned it on for about five seconds before realizing what I had done. Sure enough, it doesn't work now. The RetorN3 uses a 9v center pin positive DC plug.

Is there anything I can do to remedy my mistake? The RetorN3 has a standard 7805 voltage regulator which I'm assuming is kaput. Would replacing it restore the system to working order? Anything else? The system never exploded, popped or started smoking and I I've immediately taken it apart and examined the boards and don't see any signs of stress, burns or other damage.

I feel mad at myself, but it was honestly a simple mistake and I'm hopeful I can correct my mistake rather than calling the system a write off.

[Gnashvar]

I don't know what a RetorN3 is like but maybe it has a fuse somewhere you can change? The fuse might not look like the common glass ones, it may be like the SNES one.

BTW I did a google search and only found a RetroN3...

[Satoshi_Matrix]

hm...looking over the boards, I see something I'm assuming are fuses that I am assuming are the problem. They're boxy horizontal cylinders. On the NES daughterboard there is one is labeled SJC21477B. It looks fine. On the Genesis/SNES board there's another labeled RJH143181A. Looking it over, it looks like it received the damage as it's slightly rusty looking compared to the others. The same is true for another one on the SNES board labeled F01214772A. This one looks the worst of the two. There's also another one labeled RJH24576A on the Genesis/SNES board, but it looks fine.

So the bad ones look like they're

RJH143181A
F01214772A

What are these parts I need to replace?

[Satoshi_Matrix]

okay picture dumping
























close ups of the components I suspect have gone bad:

[CRTGAMER]

That is painful, sorry that happened. Of all the transformers to plug in, the only AC output plug; the NES. That alternating current plug wrecked havoc on the direct current RetroN3. Pics don't tell the story, some parts could be fried with no visual difference. Probably cheaper to just buy another console.

[Hobie-wan]

Those 2 closeups are timing crystals. It's more likely that the power mosfet, capacitors, or resistors near the power plug roasted. Though the 2 mint green components in 22519 might be fuses. Check them for continuity.

[Satoshi_Matrix]

problem solved by replacing the voltage regulator. Thanks guys.

[Flake]

I would recommend some kind of brightly colored label for the NES PSU - it sounds like this mistake could be too easily repeated.

Now that it is fixed, can one of you technically minded folk explain to me exactly what happened when he applied the AC power source to a DC machine? I kinda understand the differences between the two electrical types but not when they get together and have a party.

[CRTGAMER]

problem solved by replacing the voltage regulator. Thanks guys.

Glad you didn't follow my advice and pursued troubleshooting and found the problem. I thought the plug in power brick is the voltage regulator, so I'm confused by the fix. A pic of the failed part?

I would recommend some kind of brightly colored label for the NES PSU - it sounds like this mistake could be too easily repeated.

Now that it is fixed, can one of you technically minded folk explain to me exactly what happened when he applied the AC power source to a DC machine? I kinda understand the differences between the two electrical types but not when they get together and have a party.

Alternating Current reverses polarity rapidly where as Direct Current is a continues amp feed in one direction. The NES console is the oddball quirk that is designed for AC input but can also take DC input,

[Hobie-wan]

problem solved by replacing the voltage regulator. Thanks guys.

Glad you didn't follow my advice and pursued troubleshooting and found the problem. I thought the plug in power brick is the voltage regulator, so I'm confused by the fix. A pic of the failed part?

In this picture.

The 3 legged guy with the screw between the 2 capacitors.