Beringer transformer taps??

[nosaj]

I have a Behringer k3000fx keyboard amp came from the EU. So it's 220v.
I opened it up It has the the LPA1300 poweramp. Here's the schematichttp://bee.mif.pg.gda.pl/ciasteczkow...Schematics.pdf

The toroid transformer has a blue wire bundled up on it. Any chance this wire might convert me to 120v?
Part number on transformer TR-TOR-BXL3000EU.

Thanks,
nosaj

[nosaj]

i found this https://www.diyaudio.com/forums/anal...id-wiring.html
Suggesting that black and blue will give 120v. I believe that I also should change the fuse ?

Thanks,
nosaj

[dmeek]

The tap might be for 240V. It won't hurt to try it. If it is 120V double the amperage of the fuse.

[The Dude]

What you describe seems reasonable. Does it have a single connector on the secondary that you can just temporarily unplug (like this one https://www.fullcompass.com/prod/516...FQe8wAodB1cHJQ?) If so, you could measure a secondary winding with 220V on the primary. Then switch primary wires, using 120V and compare the voltage at that same secondary.

[nosaj]

What you describe seems reasonable. Does it have a single connector on the secondary that you can just temporarily unplug (like this one https://www.fullcompass.com/prod/516...FQe8wAodB1cHJQ?) If so, you could measure a secondary winding with 220V on the primary. Then switch primary wires, using 120V and compare the voltage at that same secondary.

Red is the 220v Blue is 120v. Already changed over an played through it. Hopefully this helps someone else.
nosaj

[nosaj]

The tap might be for 240V. It won't hurt to try it. If it is 120V double the amperage of the fuse.

Because it came from Europe wired for 220v would doing the opposite regarding the fuse be correct? halfing the amperage of the fuse?

Instead of the guessing I'll just go see what's in there and check the US manual for the amp. That should be correct.

I'll post followup.

thanks,
nosaj

[nosaj]

What you describe seems reasonable. Does it have a single connector on the secondary that you can just temporarily unplug (like this one https://www.fullcompass.com/prod/516...FQe8wAodB1cHJQ?) If so, you could measure a secondary winding with 220V on the primary. Then switch primary wires, using 120V and compare the voltage at that same secondary.

No 220v ac in my shop. Though when I get a permanent place I will have one, for repairing dryers(there's probably not much out there I don't work on Learned it from my dad.

nosaj

[The Dude]

Because it came from Europe wired for 220v would doing the opposite regarding the fuse be correct? halfing the amperage of the fuse?

Instead of the guessing I'll just go see what's in there and check the US manual for the amp. That should be correct.

I'll post followup.

thanks,
nosaj

dmeek has it. Double the fuse rating.

[nosaj]

dmeek has it. Double the fuse rating.

Yep. It had a 3.15A 250v ceramic fuse, manual says 6.3A 250v fuse for the US.

Thanks for everyones help. Now onto the keyboard that came with it...It'll be easy just a 12v 1.5a wallwart and a dc jack replacement(how is it people destroy the dc jacks just cramming an cramming it to try an get it to work just makes it worse.

nosaj