Hi,
I’m also having the same issue with my UF8. The modulation wheel is working fine, but the pitch bender is constantly sending data (values in the range of 2400-2600) regardless of the position of the wheel, which mechanically behaves as expected. I’m using a MIDI filter to remove the incorrect bender data so at least I can use the keyboard without it interfering. Here is a sample of the MIDI output (I pressed a key at the end):
TIMESTAMP IN PORT STATUS DATA1 DATA2 CHAN NOTE EVENT
02DFACBB 9 — E0 2C 54 1 — Pitch Bend
02DFACFA 9 — E0 58 53 1 — Pitch Bend
02DFAD57 9 — E0 2C 54 1 — Pitch Bend
02DFAD95 9 — E0 00 55 1 — Pitch Bend
02DFADB5 9 — E0 2C 54 1 — Pitch Bend
02DFADF3 9 — E0 58 53 1 — Pitch Bend
02DFAE4F 9 — E0 2C 54 1 — Pitch Bend
02DFAECC 9 — E0 58 53 1 — Pitch Bend
02DFAF2A 9 — E0 2C 54 1 — Pitch Bend
02DFAFA5 9 — E0 58 53 1 — Pitch Bend
02DFB002 9 — E0 2C 54 1 — Pitch Bend
02DFB07E 9 — E0 58 53 1 — Pitch Bend
02DFB0DC 9 — E0 2C 54 1 — Pitch Bend
02DFB11A 9 — E0 00 55 1 — Pitch Bend
02DFB13A 9 — E0 2C 54 1 — Pitch Bend
02DFB178 9 — E0 58 53 1 — Pitch Bend
02DFB1D5 9 — E0 2C 54 1 — Pitch Bend
02DFB214 9 — E0 00 55 1 — Pitch Bend
02DFB233 9 — E0 2C 54 1 — Pitch Bend
02DFB272 9 — E0 58 53 1 — Pitch Bend
02DFB2CF 9 — E0 2C 54 1 — Pitch Bend
02DFB34B 9 — E0 58 53 1 — Pitch Bend
02DFB3A8 9 — E0 2C 54 1 — Pitch Bend
02DFB3E7 9 — E0 00 55 1 — Pitch Bend
02DFB406 9 — E0 2C 54 1 — Pitch Bend
02DFB445 9 — E0 58 53 1 — Pitch Bend
02DFB4A2 9 — E0 2C 54 1 — Pitch Bend
02DFB51E 9 — E0 58 53 1 — Pitch Bend
02DFBB02 9 — 90 37 38 1 G 3 Note On
02DFBB92 9 — 80 37 0E 1 G 3 Note Off
Can you please also share the schematics with me? Any help on how to resolve this would be greatly appreciated. Thanks!