Grieswig: GREAT picture (of an admittedly sad situation) that certainly ends the burning smell mystery. I am hopeful FAS tech folks will chime in here, ID the mystery component formerly residing in good health at L42, and comment on its demise. This looks to be a good item of the Sticky/Wiki variety as many Axers use products like the LF that might use >9V transformers.The attached photo should remove any further doubt. This is the section of the main board near the MIDI ports of the AxeFX II. You can clearly see a SMD component that is fried, which appears to be labeled L42. So at the very least this part of the circuit is lost, and since it is SMD it will be nontrivial to replace. The MIDI IN port is also of the type that can't be easily redone to more directly connect the phantom in port to Pin 6&7, so the only apparent solution is the one offered by Liquid Foot or a homemade adapter that does the same.
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I've been running my All Access off the rear port of the Axe-Fx II for a long time now -- it's fine.Eyh....you guys are scaring me. I'm afraid to plug in my All Access now.
And that it does.The attached photo should remove any further doubt.
Interesting, but this actually sounds very different. The component that Liquid Foot says burned out is something inside the AxeFX II itself, not the external adapter powering the MIDI foot controller. But maybe they are related.
yes, but the end result was the same... it eventually stopped frying my adapters, and just stopped passing power. Very lucky it didnt fry my LFJR. I did something similar to Jeff's solution, just wired it directly to the patch panel.. bypass the axe totally, still not happy with a brand new unit frying 3 adapters and then just stoping to work as it should. I need to open to see if the same component is dead.
This. Phantom power passes through the motherboard to get to the MIDI In jack. The burned component—an inductor, I think—connects directly to that jack. It couldn't handle the current drawn by the foot controller, and it fried. Ouch!
Wow. Not good at all. Javajunkie and several others have the new LF+ models and I've been waiting for them to weigh in.
Help me understand that, Sean. The way I've seen ferrite beads used, they wrap around the conductor, and don't carry any current at all. They don't fail unless you physically break them.Ferrite bead
Help me understand that, Sean. The way I've seen ferrite beads used, they wrap around the conductor, and don't carry any current at all. They don't fail unless you physically break them.
I blew one out. I believe I commented a while back. Looks like that post got pruned. I wouldn't use anything over 1000 ma in the axefx II phantom jack. I believe when you order the lf now and specify youvare using it for an axefx, they send a 1000 ma adapter with the correct barrel size.
That will not work if you are using 2 lf+ s.
I made a custom cable where I don't need to plug in to the axefx at all.
i can verify this.. I had an ultra for a long time many years (since v4 firmware) in same rack with the same custom patch panel, same adapter. Powered my fx1 for years, then when i got the Liquidfoot, it powered it fine as well, no problems.
pulled out the axe 1, swapped it out for the axe2, plugged everything back up and my power adapter lasted about 15 minutes, then burned out, tried another adapter... same thing. totally rewired from scratch with brand new cables, burned out yet another adapter. Finally gave up, and wired the adapter to the patch panel, no problems since. I can verify that the axe is not supplying power through the midi cable, nothing comes out. No fancy adapters, just a 9v ac adapter i've used to power my fx1 for ages.
I have been using the MFC adapter. But just with 1 LF+. Since a second one will be joining the fray, can you please illuminate me about the custom cable?
Thanks,
John
The MFC is 9V, LF+ is 12V. It works but you are probably under supplying the LF+ with power. I would confirm with FAMC that that is okay.
As for the cable, I took a female barrel connector from a Rocktron 5 to 7 pin cable. I couldn't use it with the Axe-fx because the piece of junk on has 5 wires instead of 7.
So I took the pigtail off of it and wired it to pins 6 and 7 of a bestronics 7pin cable I have. I plug the power supply into the pigtail.
I will do this from now on for phantom power. There is no way it can hurt the processing unit this way.
thats pretty much what i did, took a female barrel and wired it to the pins on my female 7 pin xlr on my panel. This is very odd though, I dont understand why it worked with the ultra and not the 2. Again mine was the same adapter and cable setup i've been using for ages, road tested mother approved
It appears the ultra was just a direct wire to the pins inside the unit, on the 2 it's going through some kind of circuit on the motherboard.