Error code 01A0 - Matrix T3Xi Treadmill

Hi There, there are a few styles of Matrix Fitness T3xi units depending on model year. Do you know if you have a DC Motor(orange-reddish) or an AC motor(usually gray or black with 5 wires coming from the motor).
01A0 can lead you to a speed sensor issue(AC Versions only).
The DC motor versions have a control board of ASM-MEEEX-xx and passes the feedback from a front roller to the upper board to compare and regulate speeds.(issue may be upper bd)

Now the AC Motor version would spit this error if that large ENCODER wheel attached to the rear of the AC motor shaft gets dust in it's large gaping slots which are read by a small optical sensor sitting inside a small black plastic box attached to the motor case.
If you have the AC version motor, and if you have a control board marked ASM-ACD3X, ADJ3X, then power off the treadmill, then unplug it from the wall outlet. Now lets pull the feedback connector off of the small 3-pin white connector on the control board, and plug the treadmill back into the wall, and turn on.....
Now try to hit GO or Start and see if the unit runs with no error. If so, you have either a bad feedback sensor or bad wire. Matrix had huge issues with this encoder sensor, with loose, shorted, intermittent soldered connections inside this small sensor, i personally reworked hundreds of them when I worked for Matrix.
Here's a trick to remember....the software loaded into the CPU(brain chip) on the lower (AC Version) control board can operate in one of two modes, this is known only to the engineers at DCI Inc., of Mo(the designers) and 3 other folks I know....and now it's out there for everyone!....
The listed control boards can run in Open-Loop, or Closed-Loop.
This means, if that control board "see's" a feedback signal to that 3-pin connector when the drive circuits are initiated, the control board will stop the walking belt if a speed-to-encoder ratio is off or mismatched. IF that control board doesn't see any feedback there when the drive is initiated, it can assume there is no feedback tied and then reverts to a set of "look-up" tables inside the CPU to operate the speed regulations, and thus allow that treadmill to operate although the speeds may be off noticeably.
Good Luck.... ;o)

If you wish to get some details; check the site linked here. Pull up older posts...
http://electro-medical.blogspot.com/