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 Post subject: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:15 am 

Joined: Sat Mar 28, 2009 4:46 pm
Posts: 695
Location: Los Angeles, California
i've had my apc for a year and a half out of which it's only gone out to two gigs and generally just looking pretty on my
desk with the occasional transport use. around the beginning of the year i've noticed that whenever the 4th fader is at the
very bottom, the channel volume read -65.4db but going to -inf if i just nudged it up a tiny bit.

just now i boot up live and i see the volume of the 4th channel just going up and down, constantly oscillating by a few db
with it only stopping if i turn off/disconnect the apc. all the other faders and knobs are fine, no issues whatsoever.

has anyone else had this happen? again it's really weird because it just sits on my desk most of the time. never dropped it,
spilled anything, etc. just the occasional bit of dust that settles down.

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 3:29 pm 

Joined: Wed Sep 24, 2008 3:00 am
Posts: 941
Location: Pittsburgh, PA
Yep. This just started happening to me also except mine is on channel 2 and it does the same thing except mine is when the volume is UP. I had it mapped out to Traktor and was using it live for basically the whole summer. It just randomly started doing this. Like, if the fader is all the way up, the volume fader in the software is slightly down and kinda twitching there. I have to grab the APC40 fader and turn it down a little to find the sweet spot where it keeps the software fader to full on!!! Fucking annoying, especially live. I was hoping it was a mapping issue but I checked and same thing happens in live with the same fader. I've since started using a different setup for my Traktor live stuff but I still love my APC40 for producing in Live. Oh well, looks like it's staying in the studio now. Maybe there's some dirt or something in there.

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 4:32 pm 

Joined: Wed Feb 23, 2005 5:19 pm
Posts: 3129
Location: Reading, UK
Similar with mine too - 4th fader seems to have become non-linear now as well as bounce around etc.

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:11 pm 

Joined: Sun Jul 15, 2007 8:21 am
Posts: 3125
Location: Shreveport LA, sometimes Dallas/Ft Worth TX
it happens a lot to APC40's little after a year or so. For me it's been fader 7
I bought some replacement faders from MPCstuff, still havent put them in. Maybe this week, I'll report back when I do.

I find it funny when I see people recommending it by saying it's got great build quality.
Anyone who says that has never opened one up or had it for over a year.

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:16 pm 

Joined: Sun Jul 15, 2007 8:21 am
Posts: 3125
Location: Shreveport LA, sometimes Dallas/Ft Worth TX
side note:
I am beating this shit out of this old Vestax PMC 06, it's got many years on that APC40.
works great!

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:51 pm 

Joined: Fri Oct 22, 2010 9:43 pm
Posts: 374
Location: vienna
same problem but with the crossfader :?

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:52 pm 

Joined: Sun Jul 15, 2007 8:21 am
Posts: 3125
Location: Shreveport LA, sometimes Dallas/Ft Worth TX
the cross fader is the easiest part to replace

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:56 pm 

Joined: Fri Oct 22, 2010 9:43 pm
Posts: 374
Location: vienna
i know! but actually i got this problem only since 4 days

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Tue Oct 23, 2012 5:57 pm 

Joined: Fri Oct 22, 2010 9:43 pm
Posts: 374
Location: vienna
the only strange thing is that i almost never used the xfader

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Wed Oct 24, 2012 12:55 am 

Joined: Tue Aug 23, 2011 9:35 am
Posts: 185
Location: Shenzhen
Same problem here with device control encoder no. 2.

I emailed akai hoping it might be an issue i can fix myself. Thought its a software problem first. But even if it was, as a user u cant even update the firm ware!

Anyways, the akai guy told me to get it serviced. Might take up to 6 weeks where i live :(


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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Thu Oct 25, 2012 6:16 am 

Joined: Sat Mar 28, 2009 4:46 pm
Posts: 695
Location: Los Angeles, California
i see. yeah, i read on other sites of people experiencing similar issues with their apc.
what frustrates me is that it's only been sitting on my desk... just sitting there. yay akai.

i'll just replace the fader soon enough with fingers crossed nothing else goes south with it.

Image

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Thu Oct 25, 2012 1:03 pm 

Joined: Mon Apr 18, 2011 3:14 pm
Posts: 65
Location: Asheville, NC
This happened to me as well.

You can buy replacements on mouser for much cheaper than mpcstuff.



688-RS45112A400G
RS45112A400G
ALPS Slide Potentiometers
10 KOhms 20%

You'll want a fairly high wattage for your soldering iron too.


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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Thu Oct 25, 2012 1:14 pm 

Joined: Fri Aug 26, 2005 3:50 am
Posts: 102
Location: Minneapolis
!!!This is DYI will probably void warranty!!!:

My master fader was doing that. First i sprayed a tiny bit of contact lube into the fader...seriously just use a tiny bit, i'm of the understanding that you shouldn't use that stuff on some equipment. the problem immediately went away after that, but the fader had a metal on metal feel when sliding it.

Next i used the slightly blunted end of a broken toothpick to stuff dielectric grease into the fader slot.

Smooth fader again, problem fixed ever since.

I wonder if just using the grease instead of spray contact lube would work too...

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Thu Oct 25, 2012 2:47 pm 

Joined: Sun Jul 15, 2007 8:21 am
Posts: 3125
Location: Shreveport LA, sometimes Dallas/Ft Worth TX
Q&A wrote:
!!!This is DYI will probably void warranty!!!:

My master fader was doing that. First i sprayed a tiny bit of contact lube into the fader...seriously just use a tiny bit, i'm of the understanding that you shouldn't use that stuff on some equipment. the problem immediately went away after that, but the fader had a metal on metal feel when sliding it.

Next i used the slightly blunted end of a broken toothpick to stuff dielectric grease into the fader slot.

Smooth fader again, problem fixed ever since.

I wonder if just using the grease instead of spray contact lube would work too...


good advice for sure, THANKS.
However, my warranty is long gone as well.

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 Post subject: Re: apc40 channel 4 fader issue
PostPosted: Thu Oct 25, 2012 3:06 pm 

Joined: Sat Mar 28, 2009 4:46 pm
Posts: 695
Location: Los Angeles, California
my warranty is expired anyway. with the new ableton stuff i might just get the new push so that something else won't work on an expensive piece of gear.

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