Korg Forums

tommy1340millar · Posted: Sun Nov 19, 2017 6:02 pm Post subject: USB power for outboard

Shared withed 3X as I have both.

I bought a Roland D-05 module, which uses USB power.
When I connect it to the Pa3X it powers up, then off instantly and scrolls through on/off continuously.
Pa3x is listed as supporting USB 2.0, so should this not work?
Not long after I bought 3x (Jun '11) i was using a little light in usb, all good.
Tried a Roland A800 keyboard - nothing.
Tried charging an iPhone - same as D-05 - enough to start, but not enough to keep it going.

any suggestions?
I haven't tried it with Pa4X yet, as I have 3x set up at home
in theory, I should only need a USB for power and midi :O
_________________
Pa5x-76, Pa4x-76, Pa3x-76, Pa1x-pro, Korg i3, 2 x Korg i30, Roland Bk-9, Yamaha sy85, Kawai K1 mk2, Roland D-05,JP-08 (x2), JU-06 and JX-03, JU-06A,TR-08,TR-09, VP-03,K-25M (x5), JU-06A
Korg D32XD, Roland VS-880 ex

Stilli · Posted: Mon Nov 20, 2017 8:18 am Post subject:

It appears that the PA3X does not provide sufficient power at the USB ports to support the Roland and I would guess that the PA4X won't either so it looks like you will have to use battery power for your device in order to use it with the keyboards.
_________________
Korg PA4X, Kawai MPIISE, Ketron SD4, Roland Integra 7, Motu Midi Express XT, Motu Audio Express, Cubase 9.5 Pro, NI Komplete 12 Ultimate (Collectors), Omnisphere, TC-Helicon Voicelive 3, Bose L1m2 (x2) + B2 (x2)

AntonySharmman · Posted: Mon Nov 20, 2017 10:42 am Post subject:

It's highly recommended not to use keyboards USB ports as power supply for any device with power consumption over 300mA
(although my advice is not to use them at all) !
Get an external USB power distributor for such devices !
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook

Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V

tommy1340millar · Posted: Mon Nov 20, 2017 12:00 pm Post subject:

Many thanks for responses guys!
I tried it with a USB iphone charger. Powers up superbly!

I had just hoped that I could cut a corner or 2 and use 1 x cable for
Power, Midi and signal
_________________
Pa5x-76, Pa4x-76, Pa3x-76, Pa1x-pro, Korg i3, 2 x Korg i30, Roland Bk-9, Yamaha sy85, Kawai K1 mk2, Roland D-05,JP-08 (x2), JU-06 and JX-03, JU-06A,TR-08,TR-09, VP-03,K-25M (x5), JU-06A
Korg D32XD, Roland VS-880 ex