foley73 0 Posted June 11, 2010 Has anyone had to replaced a Z-Chip in a MH-721 Cutter and if you have cane you walk me through it I know where it goes I just dont want to put it in upside down and melt my Mother Board. I cant get anyone to answer at Tech and need my machine really bad. It takes me 5 to 7 days to get my stuff when I order it , I am in Ky. Need help bad have a big job to do and really cant wait until Monday. Share this post Link to post Share on other sites
MrMopar64 47 Posted June 12, 2010 Not sure what the z chip is... but most changeable chips have a notch cut out of one end if you put the new one in with the notch in the same way you should be good to go... MM64 Share this post Link to post Share on other sites
Guest manwayvan Posted June 12, 2010 Some will also have a dot indicating the number 1 pin. Share this post Link to post Share on other sites
Guest HowardI Posted June 25, 2010 The "Z Chip" is the chip that regulates carriage vertical motion. It controls the up signal, and the down signal. If the knife goes up upon power up but will not go down, this is likely the culprit. It can be the culprit even if there is no movement vertically but in this case its not the only possibility. It's easer and faster and to ship this chip than to have someone replace their entire motherboard. Howard Irwin Support Specialist US Cutter 425-481-3555 888-298-8143 - Option 2 Share this post Link to post Share on other sites
ekcetera 0 Posted July 26, 2010 Just replaced the ZChip on the MH-721. Now, the head doesn't move at all. Before, it was springy - you could push it up or down with your finger. Now, it's very stiff - it will move up or down, but there's resistance when you press on it and it doesn't move at all when cutting. Could it have been installed wrong? Could something else have happened when it was installed to be causing this? Thanks. Share this post Link to post Share on other sites
