APC40 Fader Response messed up..? Any ideas on how to fix it

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JuanSOLO
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APC40 Fader Response messed up..? Any ideas on how to fix it

Post by JuanSOLO » Fri Nov 05, 2010 4:14 pm

Recently one of my volume faders on my APC40 started acting strange. Instead of there being a smooth transition it now jumps from a low value to a high value when pushed about 3/4 the way up. It's like it's lagging from a value of about 5 to about 100. And on top of that it will not go all the way up and more. I opened it up to see if there was anything caught in the fader, like hair or crums, and found nothing. Everything looks 100%.

Has anyone experienced this? Is there a fix?

ark
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by ark » Fri Nov 05, 2010 5:26 pm

In your situation, I would start by using a MIDI monitor such as MIDI-OX to determine exactly what was going on.

JuanSOLO
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by JuanSOLO » Fri Nov 05, 2010 9:47 pm

I'm getting zero response till about 1/4 way up, then from 1/4 to 3/4 up it goes from 1 - 2, then from 3/4 till the top it goes from 3 - 124.

flippo
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by flippo » Fri Nov 05, 2010 11:34 pm

deng, hearing a few reports of busted faders on the APC :( They seem so solid on the outside.

My x-fader has started to die already, after less than a year. At least that one is replaceable.

White_Rabbit
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by White_Rabbit » Sat Nov 06, 2010 3:35 am

whats the method for replacing the xfader? where can you get midi faders? mine isn't working right but I haven't pulled it apart yet. Is it a simple operation?

JuanSOLO
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by JuanSOLO » Sun Nov 07, 2010 4:32 pm

Replacing the Xfader should be easy if you can find one for sale. It's only 2 screws and a plastic snap together wire hub thing.

tn64
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by tn64 » Mon Nov 08, 2010 1:54 pm

Recently one of my volume faders on my APC40 started acting strange. Instead of there being a smooth transition it now jumps from a low value to a high value when pushed about 3/4 the way up. It's like it's lagging from a value of about 5 to about 100. And on top of that it will not go all the way up and more. I opened it up to see if there was anything caught in the fader, like hair or crums, and found nothing. Everything looks 100%.

Has anyone experienced this? Is there a fix?
I have same problem but worse because all my my faders act like that! MidiMonitor (OSX app) shows that faders send only from 0 to 40-50 cc messages. Knobs and everything else is fine with my APC40.

digitalrust
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by digitalrust » Thu Jun 16, 2011 7:20 pm

I just started having this issue as well with volume fader 4. It's only sending cc values 0-8 while every other fader works normally sending 0-127. After I moved the fader and let it rest for a few seconds it will send out a few more cc's. Sucks.

Did anyone else ever get this resolved?

digitalrust
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by digitalrust » Thu Jun 16, 2011 7:30 pm

Ok, did some research. This site sells replacements. I called them up and they said that this happens all the time and this part is all you need to fix a faulty fader:

http://www.mpcstuff.com/mpc-slider-post-switch.html

$15

bertzerk
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by bertzerk » Thu Jun 16, 2011 7:47 pm

this was happening to me a few weeks ago...i just sprayed a lot of compressed air in it and it works fine now.

JuanSOLO
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by JuanSOLO » Thu Jun 16, 2011 10:29 pm

I just ordered 2 of those. Hope it does the trick.

digitalrust
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Re: APC40 Fader Response messed up..? Any ideas on how to fix it

Post by digitalrust » Thu Jun 16, 2011 11:37 pm

@bertzerk - I've gone through an entire compressed air can and nothing.

For those of you looking to take apart the APC, I found this tutorial which shows all of the pieces that need undoing: http://www.youtube.com/watch?v=7lD1rL-ions

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