Possible Solution to Cybex 770t Treadmill Error 1 Problem

Mar 05, 2020

ERROR 1: No Speed Signal at Startup

This error code usually occurs only during start-up and indicates that the computer in the control panel is not receiving any indication of motor speed. To isolate the source of this problem, you need to determine whether the drivemotor tried to start up and did rotate or whether it never came on at all.

If the drive motor (and running belt) rotates, even if only for a second or so, the error code usually indicates that the speed sensor is malfunctioning. The quickway to check this is to remove the motor cover and the front panel to witness the SPEED LED on the motor control board. If it blinks when the flywheel isrotated by hand, the problem is most likely the console cable. After that, suspect the lower board and then the display board. This signal can also be seen on a diagnostic LED of the display board.

If the drive motor (and running belt) does not rotate at all, the problem is more difficult todiagnose. First, suspect the power relay and check it by going into diagnostics, d13, andpress the v elevation button in conjunction with the SPEED + button. This will toggle the relayon/off. You should be able to hear the relay toggle and note as well that the value in the rightwindow reads "1." If it reads zero, the problem is most likely the console cable. If none of these prove to be the problem, have a qualified service technician check the wiring for wear or abrasion and also inspect the motor brushes.