While you wait for answers, we may have found some information which could help you.
Click here for Start Key Numbertx335?
Is there anywhere i can find a motor control board for my sportcraft tx4.9 ?
need speed sensor wheel?
Why does my Sportcraft Tx 4.9 run slowly?
tx 300 sporadic speed changes?
How can i fix my tx400 sportcraft treadmill model #04040?