Can anyone advise exactly where the voltage switch is located? I have the 1010 open in front of me, but nothing obvious seems to be presenting itself. Thanks.

For a given power rating, a 50Hz transformer core will always be physically larger than a core needed for 60Hz operation. If a transformer is correctly designed for 50Hz operation, then it will

Transformers are designed for a specific frequency - not so much the windings as the material and design of the core. But the difference between 50 and 60 Hz isn't much, and since it has the ability

50Hz or 60Hz operation will make no difference. The transformer is designed to operate on either frequency at either voltage. The rest of the electronics inside after the transformer will not care

Thanks, I have it now but the good news is that the Roland UM-ONE Mk II worked with my Mac, when I say worked, it passed the Sysex test, part of the fcb1010.eu Midi Monitor app. Have now ordered a

I have not had any problems after changing the internal voltage tap and my FCB1010 is fully functional for the last four years.

A local electrician noted the step up transformers do not alter the operating frequency - 50hz at 240V, vs 60hz at 120V. Does the present an issue if the internal voltage is switched down to 120?

Yep, it looks like I was right. As I said, by decreasing the voltage by 1/2 you double the value of the fuse rating. At 240 the rating is 50mA and at 120 the rating is 100mA. Simple electronics math.

Never increase a fuse rating unless the directions specifically tell you to do that. In this case, you need look no further than the manual:

The Compatibility db is in the UNO group, in the Database section.

Thanks to everyone, EJ, Danne and Cem, for your help. Looks like the midi-usb adapter is the prime suspect so I’ve ordered a UM-ONE Mk II to arrive today (Wed). Assuming this passes the Un02

You will also need to change the fuse rating. There is a different fuse rating for 110 v than 220 v. I think you need to keep the wattage the same so if the voltage is cut in half the fuse amperage

The stock FCB1010 comes with two voltage settings which you can change to suit your location. Open up the FCB1010 and change the tap voltage settings to 110 volts internally without needing an

Bulls-eye! The calibration did the trick! Thanks to both of you … great forum.

I have a brand new, never used, FCB1010 240V unit for sale. I ordered it on-line, and was sent the wrong voltage. I ended up keeping it as the return postage was worth more the the device. Now I

Thanks Jack and EJ. Wow, that was quick … you guys are on the ball! You may have solved this I’ll start with recalibration, and if that fails, I’ll send you the sysex

And yes, what Jack said.

Didn't we already do this? OK, let's work backwards this time. Export and attach your sysex and I'll have a look at it.

You more than likely need to recalibrate the expression pedals for them to work properly.

I purchased a new FCB1010 last week control my Kronos2 and LS. The firmware is V2.50, and my synths are also up to date. What has me stumped is getting the two expression pedals to work. When I