Exchange tips and tricks for the Akai MPC4000
By Multimode1200 Wed Feb 01, 2023 8:31 am
Hey what’s going on. Today my mpc 4000 whole pages functions will not work. All the other buttons work except that whole cluster of buttons. 2 tact’s we’re not working, but now, none of the buttons on that bank work. Any advice?

So basically u can’t do anything with the machine at this point.
User avatar
By Telefunky Wed Feb 01, 2023 6:01 pm
If you‘re not afraid to open (Pandora‘s) box and feel confident to replace switches...
IIrc the jog/arrow combination can be unscrewed and tilted enough to get to the bottom of the switches.
But: for a test you‘ll have to power it up at least half opened and in that case the metal (cooler) of the powersupply is a life threatening danger, if touched. Definitely.
The cooler carries at least 2kV, much more than a wall outlet.
(if you never done something like this, pass it on to someone experienced)

The test is relatively simple: locate he contacts of a switch and close it by some metal part. If the cursor moves, the switch is dead and needs replacement.
If nothing happens, the fault is in the switch decoding and more complicated to track down.

take care and best of luck, Tom