Hello, I have a gig in a week, and the last time I used my bass & amp I put my 120V into a 220V plug, frying my amp, I wanted to know if the Fender Rumble 40 had a fuse so I could just replace that instead of having to buy a new one? I’ve read the Rumble Fender handbook and there seems to be mention of fuses but not specifically for the 40. Does anyone know if there’s a fuse in the amp? your help would be greatly appreciated
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I’m no electrician but surely every plug contains a fuse (I’m on UK 240V). Turn the plug over, there should be either a little door you pop open with a screwdriver, or a screw you undo to remove the plug cover.
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Pretty sure that the UK is the exception here.
No fused mains connectors used in North America.
So if there is a fuse it’ll be inside the amp. Sometimes they’re soldered to the PCB.
Caveat- I’m not an electrician 
Leads Direct | What fuses are used for plugs in countries other than the UK?’)%20for%20protection.
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We do have an actual electrician on the forum. What do you say, @autumnsdad1990?
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How did you do this? A plug adapter without a transformer?
Correct.
About ten minutes of research has me pretty sure the rumble 40 uses a transformer not a power supply, but I haven’t dug enough to find pictures of the circuit boards to be certain. If it’s a transformer you let the smoke out of something downstream and will need to identify and replace that component(s).
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Basically given your deadline it’s probably time to consider this one junk and see if you can get it repaired later. Meanwhile try and find a loaner or rental amp?
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no
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Thank you so much , much appreciated
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Alright Thank you so much
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That said don’t write it off completely - it might be repairable, just likely not on your deadline timeframe.
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most likely repairable indeed
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Actually now that I think about it it is a little surprising the power supply couldn’t switch up to that voltage. Maybe it’s not a switching power supply?
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I won’t tell anything without a proper schematic 
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Yeah thats why I edited 
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Looks like it’s a SMPS, but only switches power input on 100-120V OR 220-240V, with separate parts.
Also looks like there’s a fuse.
Worth checking at least 
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There isn’t a fuse on my rumble 40. It looks like there is an in inline current limiter on the board-But replacing it yourself is most likely not in play.
I’ve never dealt with any systems outside the United states, but how did this occur? Are you using a variable output power supply?
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So I’ve never seen this voltage swap magic being done without someone doing some serious tomfoolery. I dont really understand how it occurred, but it looks like the board would probably need a new current limiter. My guess is a) Get a new board and install it, b) send it to fender and get it repaired or c) keep it in the attic in the hopes you’ll find one with a blown speaker that you can harvest the board from.
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sometimes there are internal fuses, directly located on the PCB
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Yeah, inline current limiter. But they aren’t reset type. They are melting alloy type- meaning they burn and they are done.
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So you’re saying that’s what the smoke gets let out of first.
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