Forum to discuss all matters relating to the MPC1000 and MPC2500 operating systems created by 'JJ' (all versions).
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By arebee Wed Jan 13, 2010 10:25 pm
whats with the data wheel type thingy?

why is there an addition for two types?
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By Sooty_G Thu Jan 14, 2010 9:14 am
apparently, as of may 2009, new mpc 1000 units manufactured by akai have a different circuit board for the data wheel. this new model was causing some value skipping so JJ made the fix. it's only an issue for people who buy brand new (post may 2009) mpcs.

check this thread (about halfway down the page): http://www.mpc-forums.com/viewtopic.php?f=25&t=122795