So I have an ableton APC40
It started acting up about 3 months ago (i've had it for 3+ years). Basically
- a couple of the knobs on the part highlighted in orange below, weren't functioning properly, and were sending commands to the midi interface when not being used, and also when they were in use they wouldn't respond properly (skip a trigger, or not respond to a trigger at all)
Areas in BLUE are for the faders
Areas in ORANGE are for the knobs
Now I took the unit apart (being an elec eng student i thought....what the heck) and noticed a lot of dust built up. I pulled out my toothbrush, iso-alcohol and got to work. I scrubbed down both ends, scrubbed down the area highlighted in blue (the faders) and the knobs. Also to note, i did scrub in and around the diodes, and even the potentiometers.
I put it back together, and now:
- The knobs in orange won't even deliver a signal past a quarter rotation (so if an effect has a dry/wet of 0-100%, i can only trigger about 25-30%, the knob physically turns, but the response will max out at 25-30%)
- the faders (minus the master fader, most right one), do not respond at all....nothing.
I contacted ableton (the manufacturer of the midi controller), and they sent me a link for a midi audio interface software. It recorded the inputs from the midi controller, and clearly showed me that the knobs weren't responding fully (hex values would max out at about 2F out of a total 7F) and the faders weren't even sending a signal. When I got back to them they kindly directed me to a local authorized repair center.....maybe I can do something about it before I throw the towel in.
So that being said....I've attached some pictures. FYI
one pic for each, the backside shows the circuitry right underneath those pieces of hardware. Thanks for your help!
It started acting up about 3 months ago (i've had it for 3+ years). Basically
- a couple of the knobs on the part highlighted in orange below, weren't functioning properly, and were sending commands to the midi interface when not being used, and also when they were in use they wouldn't respond properly (skip a trigger, or not respond to a trigger at all)
Areas in BLUE are for the faders
Areas in ORANGE are for the knobs
Now I took the unit apart (being an elec eng student i thought....what the heck) and noticed a lot of dust built up. I pulled out my toothbrush, iso-alcohol and got to work. I scrubbed down both ends, scrubbed down the area highlighted in blue (the faders) and the knobs. Also to note, i did scrub in and around the diodes, and even the potentiometers.
I put it back together, and now:
- The knobs in orange won't even deliver a signal past a quarter rotation (so if an effect has a dry/wet of 0-100%, i can only trigger about 25-30%, the knob physically turns, but the response will max out at 25-30%)
- the faders (minus the master fader, most right one), do not respond at all....nothing.
I contacted ableton (the manufacturer of the midi controller), and they sent me a link for a midi audio interface software. It recorded the inputs from the midi controller, and clearly showed me that the knobs weren't responding fully (hex values would max out at about 2F out of a total 7F) and the faders weren't even sending a signal. When I got back to them they kindly directed me to a local authorized repair center.....maybe I can do something about it before I throw the towel in.
So that being said....I've attached some pictures. FYI
one pic for each, the backside shows the circuitry right underneath those pieces of hardware. Thanks for your help!