#19 - M-Audio Axiom 49 keyboard repair

[@philkop]

Thanks dude. You didn't just show us how to fix the keyboard, you showed us some great troubleshooting lessons for this kind of thing in general. I'd never have thought to look up datasheets on the components, but its all there on the sheet once you do the research!

[@zenonbiesek3699]

Let me says that I am virtually clueless with electronics. This video was fascinating and highly educational - a pleasure to behold. Your voice is perfectly suited to this content - I could listen to you all day.

[@GregorOttmann]

Sweet! I love it that you didn't bother to replace that faulty chip and used some basic electronics instead. One tends to forget these simple solutions when working with ICs and microcontrollers all the time.

[@TopQuarkMusic]

I sure hope my heart surgeon takes the same care fixing my heart as you do with electronics :-)

[@RalphWLundvall]

Great stuff here. Comments show many have benefitted from your vid!

[@philcalvert7156]

You rock! I was able to fix two Axiom 61 keyboards using your video. Thanks!

[@DirkFellhauer]

Thanks a lot! Now I can get my old Axiom back to work again :-). Your video is a great help. Thanks again and kind regards from Germany.

[@pascalphase2556]

A very clever approach ! It's always interesting...bravo ! from France

[@fredweather]

I recently picked up a 61 key version for $25 with one broken slider and the occasional flickering display and USB shutting off. Not the BSOD but just random flickering. There was just one mention (on a Google search) of their unit flickering and then the BSOD. Found the Alpha 10k ohm pot on Ebay (two for $7 shipped). I purchased the TCM809 reset chip from Digi-Key (two for $4 shipped). So, for a total of $36 and a couple hours of my time (not including the Google searching), it's fixed!. Thanks so very much to you and your video. Without your help, chances are it wouldn't have gotten repaied.

[@JizzleKizzle]

hello, my usb entry in the back is defective because i have to play with my wire for it to work, can you help me, anyone?

[@Anshul1614]

I got a used Axiom pro 61 with unresponsive pads. Only 1 pad works and the others are completely dead. I opened it up and saw no oxidation, but just a little tear on the strip that connects to the circuit board. Is there a fix?

[@kimrabie]

thank you for the tutorial but can you make please a video for restoring the pitch bend on axiom 25 ???

[@gaboaaa23]

i swear if i would have much money i would donate for people like you! You are a smart human!!!!!! im so affraid of buying this thing!!!!

[@jailsonpaznunes1645]

Boa tarde por favor me ajude estou com esse mesmo problema no m audio axion 61 g2,, a placa dele é bem diferente, poderia me ajudar a encontar aonde localiza esse chip nesta versão de placa??

[@Giuliettiful]

Hello Friend! I had the same problem, I managed to fix my Axiom through your method, you're master thank you.

[@jucaferreira5310]

excellent video, I damaged the capacitor next to the transistor, do you know the value of this capacitor? 

[@sdd25]

I wanted to thank you very much !!!!! ;) I have Oxygen 61 silver - My problem - keyboard turning off/on over and over again I blindly changed elements that I found in stores but this cw801 just could not find anywhere. After a month of searches on the internet I came across your post on the forum M-Audio ;) now my oxygen works perfectly ;D you saved me money and nerves ;P M-Audio website told me that I have to buy a new motherboard

[@feedback-loop]

I am glad my video helped you. Thanks for your feedback.

[@TworzymyImprezy]

It works! Thank you :) I used Capacitor and resistor method :)

[@Regularguyguitargear]

Where in this video does he get to the fix

[@hhurakan]

Hi. Could u tell me what resistor. And capacitor. Do i need? I woild appreciate it. And where. Do a connect them. I took a screen shot. But it was very blurry

[@siIverijus]

Hello, maybe you remember R1 resistor value? I have it fried searched everywhere couldn't find

[@jorlan269]

Hello, I have a doubt, is the resistance connected to the same negative side of the capacitor or is it connected to a small capacitor next to it?

[@rupak-kumar-shahisamuda]

HI! I had the same problem. I just move the usb hub behind and suddenly there is everything. Bad connection of usb can cause dead blue display....try yourself

[@neoxlefou]

Hi I have same issue but I dont have resistor/capacitor available I have seen on some video that we may use a simple switch to stay low (open switch) some time, then set it UP (close switch) but I have no idea where to plug my switch Regards.

[@DmitryIvashkin]

Доброго дня! Столкнулся с проблемой в этой клавиатуре, перестали работать почти все клавиши основной клавиатуры(только парочка работает и все послекасание), при этом реагирует пэды и в принципе вся верхняя часть. Сталкивался кто-нибудь с такой проблемой и что это может быть?

[@kellyhouseholder6737]

Hi, thanks for posting, not sure if you get comments on this that you watch. I'm wondering if you could tell me what the Resistor Value is for R1 on the main board. This is the resistor that feeds the reset chip. Mine is so badly burnt that I cannot determine the values of it. It sits next to R10 and looks to be maybe a 240Ohm but need a photo of it or colors of the good one if you could.

[@pedrocoello3558]

thank you very much ... excellent and useful video !!!! Greetings Guayaquil-Ecuador

[@Skandawin78]

Great video. Need some help to diagnose the issue with my maudio Ozone midi keyboard (with built in audio interface + phantom power). Keyboard powers up fine (needs external 9v AC power) and I see the midi channel and midi cc numbers in the display panel. But it is not recognized by the PC , although I have installed the latest device drivers from maudio site. I have tried it on different USB ports but issue remains - No MIDI. I'm sure my USB cable is good as I'm able to connect my axiom 49 keyboard using the same cable successfully. On win7 , under device manager , I see ozone academic with a yellow triangle on it. When I open the properties it says driver not found although I installed the latest driver for ozone from maudio . On Win Xp, ozone is recognized as a audio device and not as a midi device by Mixcraft DAW and I'm able to listen to audio through ozone connecting headphones. But no MIDI. Installed MIDI OX, DOSBox - No midi device recognized by both . Is it a hardware issue? USB port seems to fine since the audio interface works. Pls help on where to start and options I have to get it back to life.

[@luiggiescalante4076]

Hello, i have the same problem with a Axiom air 61... But this don't have that 3 pin reset chip, what i have to do?

[@feedback-loop]

You have to figure it out

[@jaudio3699]

For me I have that problem of m audio axiom air 25 help me

[@markustg09]

Hi, great video. Sorry for the goddy question but I am trying to put mine back together and one ground wire has me stumped. In the video at 2:48 directly above your 1st knuckle on your index finger is the screw that attaches to the black ground wire I am trying to put back. Do you recall where it goes? Perhaps on the metal rail? I should have taken a photo. :-(

[@feedback-loop]

This was 6 years ago. Perhaps, on the metal rail, but I don't recall.

[@markustg09]

@@feedback-loop Lol, good point. I am 99% sure I found it on the rail, TY

[@deepava1]

Very nice analysis, and logically explanation

[@Revan.s_music]

Whats the actual price of this midi keyboard

[@chuy25]

Someone bent the second white key on my novation impulse keyboard anyone have a clue where I can buy single keys ?

[@andymouse]

fantastic traditional repair !...cheers.

[@ChipGuy]

Nice work, however you should have added a diode parallel to the resistor. What happens if the unit it turned off: The capacitor will be discharged into the supply rail via the input protection diode of the RESET input on ST microcontroller. I have not looked into the datasheet but the input protection diodes are usually rated with something like 10mA max. When you turn the keyboard off and the capacitor discharges the chance of exceeding that limit it great and so you might damage the microcontroller in time.

[@feedback-loop]

Chip Guy Vids I don't think there is any problem with this simple reset RC circuit. Further study of the data sheet for the ST92163 recommends such a circuit (see page 89 of pdf.datasheetcatalog.com/datasheet/stmicroelectronics/5521.pdf). They recommend 10K resistor and 1uF capacitor. Apparently, about 10 milliseconds reset is enough.

[@ChipGuy]

FeedbackLoop Oh cool. Seems they designed that diode in a way that it can handle the current. I used the same circuit (10K 2.2µF) with a Genesys video converter once, it didn't like it and the pin became more and more low impedance over time until the chip would not reset anymore at all.

[@ДмитрийШвец-о9ы]

Thank you very much, without this, it worked only with the connected power supply "oxygen 49".

[@ramiroorozco5634]

Why type of usb connect do I use ? Is it a us. Female type b connected

[@diegoyiyi1]

excelente....video soy de Colombia mi controlador axiom 61 quedo en pantalla azul en el 2010,hoy lo prendo e identifica la pantalla los datos, le funciona todo menos el teclado. gracias cualquier recomendación.

[@carbonbuilds]

for the resistor and capacitor does it matter the voltage?

[@feedback-loop]

louvens filius Not for resistors. For capacitors it does matter, and polarity as well, if an electrolytic cap is used, but in this particular case the voltage is below 5V, so almost any capacitor has higer rating. Electrolytic caps have voltage rating marked on them (say, 10uF, 6.3V).

[@carbonbuilds]

So as long as the capacitor voltage is or higher than 5v I should be OK?

[@feedback-loop]

louvens filius yes, and observe the polarity - connect positive to the resistor, and negative to the ground

[@tadeuszmusic]

I deffo have this problem so gonna try with you tutorial. however, these like some weird glue on my board where the tiny black board that needs to be removed is. will that effect the soldering process?

[@JGramWilliamChicago]

So will this help if my keyboard doesn't power on

[@VasaMusic438]

great video !! I have 3 Axiom keyboard !! I would like to use modify one of them using only the white and black keys and make my own controller using a Teensy board. Is there someone who knows how to do it???

[@GlassHalfFooled]

My axiom pro 61 has the opposite problem I can see everything on the screen but the backlight went out. Have you ever came across that problem? Would that be an easy fix?

[@danieldinesh9245]

mee to same problem fix it With your help thanks lot bcoz I did back a year ago but I didn't thankful for your videos Im really thankful for u

[@THESUPEREPICZOMBIE]

hey the link you provided doesnt have stock would you be able to link the parts you used so i can do it your way to repair my own

[@feedback-loop]

if you want to replace the chip, the link to DigiKey still works. I have just checked. Part number TCM809JVNB713CT-ND, $0.41/piece.If you want to go my way, I replaced the chip with 10uF capacitor and 22K resistor. These can be varied widely. Perhaps, 1uF and 100-200K will work fine. Maybe even 0.1uF is enough with a few hundred K resistor. A ceramic capacitor can be used in this case, which is more reliable.To make it super clear just in case: resistor goes between power and reset, capacitor goes between reset and ground.Good luck.Note that I removed my first reply and replaced with this one because of a mistake there. So if you somehow read the first one, disregard it.

[@Jiveus]

can anyone help me? I think I messed up the solder points where the reset controller was. is there another spot to solder them?

[@feedback-loop]

***** Sure. Do you see the PCB traces leading to the pads you messed up? So anywhere along the traces would do. Just be careful this time. Gently scrape off a bit of the mask if you have to expose the copper. Watch some soldering tutorials and practice on some scrap board if you can. Good luck.

[@Jiveus]

FeedbackLoop thanks for the reply. I couldn't seem to figure it out as I did the damage before seeing where the trace went. I took a picture but I'm not sure if it helps. dl.dropboxusercontent.com/s/s3l0syez2hubuoj/maudio%20axiom%20board.jpg . also mine seems to be different as there seems to be another resistor to the left on your version. mine had a sticker on it that said v1.02. thanks again for helping.

[@feedback-loop]

***** Here I annotated your picture: drive.google.com/file/d/0B3NWgPtazb_tYk9zOV8tcEtsTG8 Does this help?

[@Jiveus]

FeedbackLoop yes it does, it's working now. thanks :)

[@feedback-loop]

***** Oh, great! Did you replace the chip or did you go resistor plus capacitor?

[@juanpablovaras6170]

22kΩ and 10uF ????

[@nitroxevolutionrecords7064]

seria igual el metodo con el axiom air 61?¿

[@heaplabs]

Hello, my reset monitor signal stays at gnd constantly. I tried to pull it to high by just shorting the pins after turning it on, but no luck. If only the reset monitor is broken, this should work, right?

[@feedback-loop]

+heaplabs Who knows. If the chip has internal short to ground, you are, probably, shorting the 5V rail by trying to pull the output up.

[@heaplabs]

+FeedbackLoop I did your fix with 10K and 1uF and it works! Thanks!

[@heaplabs]

+heaplabs it worked sometimes but took a long time to "boot up". I now use 47K and I think it even works better than before! (Digits appear straight away)

[@feedback-loop]

+heaplabs Great! I am glad this video helped you to fix your keyboard. Thanks for letting us know.

[@dougs_videos_and_such]

Hi FeedbackLoop - I'm looking to source the white D key for an Axiom 61 first generation. A vendor I buy keys from has it for the Axiom Pro 61. Do you have any idea if the Axiom first generation and Axiom Pro had the same keybed? Thanks

[@dougs_videos_and_such]

The Axiom 61 first gen key was the same as the Axiom Pro except I had to soak if for a week in LA's Awesome cleaner to melt the glue so I could pull an extra 1.2 gram weight

[@wmzaphod]

Thanks heaps for this, well done.

[@nitroxevolutionrecords7064]

God help me my keyboard controller has the same problem is an axiom air 61 here in my country no technical service m audio by the crisis they were help

[@vazneskuks]

Thank you very much! Now my keyboard is working again!

[@feedback-loop]

Very cool. Thanks for watching.

[@josephswenson2056]

Mine just died this morning... Thanks for the great explanation.With no Radio Shacks aroound any more, I''l probably have to buy enough parts to fix 10- keyboards, if I'm lucky. Ha!

[@deedledum21]

Thanks for your thorough and informative video FeedbackLoop. Just wondering what trigger mode you used on your Tektronix. I can't seem to capture the initial waveform dynamics. Is it a sample/hold mode? Thanks.

[@feedback-loop]

Single trigger mode from the channel connected to the power rail with threshold set within the range from slightly above 0 to slightly below 5V (I set it to 1V).

[@deedledum21]

Thanks mate!

[@deedledum21]

Single pass trigger confirmed the 'Reset' chip ramping up too fast within 5ms! Thanks for your help! Time to get a hot air rework station.😎👍

[@feedback-loop]

Cool. Please let the community know how you do.

[@deedledum21]

All fixed now! You've been a great help FeedbackLoop. Single trigger mode on Scope confirmed correct operation. This was my first venture into SMD circuits and using a heat gun to carefully remove a component. I need to practise on some old motherboards to optimise temperature and air flow settings while improving technique. Thanks again!😎👍

[@theshchannel5849]

Thank you very much! Good video with good details! My keyboard seems to start up now :-) .. But maybe now my USB port is "glitchi"!? But now it's more easy to do something about it when I know how it looks on the inside! ;-) .. Very helpful!

[@GioRemixers]

Eres un "Maldito Genio" ....funciono !!! ...gracias.

[@randel8737]

Hi sir, I got my Oxygen 49 delivered to me but when I got it only 13 keys of the higher octave are working. The rest are not (including the pads) but everything lights up. What do you think is the problem?

[@feedback-loop]

I don't know. Might be bad contacts in some connector. Might be corroded traces due to some liquid spill. Half a million ways for this to go wrong.

[@randel8737]

Any fixes for corroded traces? I have not yet opened the insides of the keyboard but I suspect since it's very specific (lower octaves not working), it might be a lost connection somewhere (either unsoldered or some wires not connected) but I doubt it's lost connection because almost all m audio keyboards have one board for all keys

[@stbalabis]

Randel Abratique have you tried a factory reset? i got mine last night and was worried coz only a few keys were functioning..then i did a Reset, and the keys are working again.. mine is a 2nd hand and was just kept for a very long time by the seller.

[@r4ndomuser861]

this is next level stuff!!!

[@premnath5749]

Hi had an off topic question, apologies for the random-ness. My Axiom 25 has a keyboard problem. Random keys - 2 or 3 of them - stop working at random times, but always in sequence. There is no pattern, so its not one or two particular keys (such as e.g. C and C#), it could be any 2/3 keys on a given day. Everything else on the device works fine.. Is it a board, the keys or maybe a software issue. Or something else. Would appreciate any advice thanks.

[@feedback-loop]

no idea, sorry.

[@premnath5749]

Thanks anyway.

[@mrsorockin]

Maaann!!! Thank you very much! It works!!! I think it will be good to sold original TCM809 ic, but for fast repair it very cool! Thank you so much! Like!)

[@stenlyspa1325]

thanks very much!!! mine still have some ishues like do not show the value of the velocity of the keys, but i thing that now it will work well. Thanks so much!!!!!!! 1000 times!

[@joelramo4185]

Hi! I'm looking into fix the BSOD issue also, but I've only got one 10µF 16V condensator and 0,6W: 20kohm resistor to work with. I'm pretty much a newbie in this field, so do you think those parts will serve the purpose aswell?

[@feedback-loop]

Yes, this combination should work fine assuming that your problem is really with the reset chip.

[@joelramo4185]

Thanks for the quick answer! I saw one of these keyboards for sale with this malfunction, and thought I'd give fixing it a try since I enjoy working with electronics. As far as I've read, the problem seems to be in the reset chip most of the time? It's a bit risky if the problem is elsewhere, but I'm probably going to take it.

[@feedback-loop]

I don't know about the "most of the time". It seems to be a frequent problem, but one never knows...

[@joelramo4185]

Yeah, that's sensible. I've got time in my hands currently and ambition to see if I can turn this into a bargain, so I'll see what I can make out of it. If you care, I'll let you know what I end up with.

[@feedback-loop]

Yeah, let us know how you do.

[@grafit9608]

muito obrigado, consegui consertar meu axiom 61 hoje

[@EzekielOliver]

Mano, o que vc fez?

[@EzekielOliver]

Tô com esse problema, mas eu nem entendo o vídeo kkkk

[@molleybeatz8054]

do you sell them aswell

[@TUKKERBEATS]

nice work !

[@grantfullen9559]

Nice repair good work.

[@Zerbinator]

Bless you brother!!!! Thank you!

[@error079]

What kills that reset chip?

[@feedback-loop]

Who knows. Perhaps, there was a batch of chips with a manufacturing defect or something.

[@TheWhitedrumer]

Hello! Can you please send me drivers for the keyboard? Thank you :)

[@ademarjunior1365]

Man, you are the best! I have a M-Audio ozonic with the same problem! But i couldn't localize the Reset chip on the main board. I have alrealdy unmounted the board, can you help me? How can we get in touch? do you have an email or Whatsapp? I can send you the photos. Thank you!

[@charlesdeanda]

First of all. Thanks for this informative video. I replaced the chip but I still get the blue screen. However now, both the "Null" and "Zone/Group" buttons light up. The computer detects the keyboard but says usb device has failed. Does this mean I have to flash the firmware back onto the keyboard or did I not solder correctly? Thanks in advance

[@charlesdeanda]

+charlesdeanda Figured it out. I had not soldered correctly. Thanks again for this great video!!!

[@letthebadguygo]

Thanks for this video. Would you recommend replacing with a properly functioning reset chip over the repair method in your video? Fewer parts to solder might be better for me.

[@feedback-loop]

Yes, sure, proper reset chip replacement would be even better.

[@letthebadguygo]

@@feedback-loop Great, I ordered the equivalent reset chip by Microchip on DigiKey website. Thank you!

[@letthebadguygo]

Beyond thrilled to report I successfully replaced the reset chip and the keyboard is functioning perfectly.

[@feedback-loop]

Very cool!

[@KaliBeatsYoSoyAquel]

I didn't understand a thing. I watched the whole video without knowing what I'm supposed to do 😢

[@thomaswindfeld728]

Great video but I am throwing in the towel! :-D I will never be able to do this :-)

[@LoudByNature02]

👍

[@mmm43kir]

Вы по русски говорите ?)

[@feedback-loop]

Случается

[@revolgin]

говори хоть по китайски а россия вылезает

[@feedback-loop]

Что же делать... Так и будем жить.

[@revolgin]

))) на самом деле вот такой английский я отлично понимаю .И спасибо вам за видео.Можно ли к вам с ремонтом обратиться?вы в каком городе?

[@feedback-loop]

Мастерской по ремонту не держу. Это все для души. Я в эпицентре Кремниевой долины.