9.23, 9.27 Treadmill
Page 24
Procedure 5.5 - Troubleshooting the Safety Key Circuit
Note:
The safety key switch is a reed switch that is operated by a magnet on the safety key. If the
safety key circuit is not functioning correctly the display will not illuminate and the treadmill can
not be operated.
1.
Set the on/off switch in the “off” position and remove the backplate from the console. Refer
to Diagram 6.9.
2.
Remove the JK5 connector from the upper PCA.
3.
With an ohmmeter, measure between the two pins of the JK5 connector with the safety key
installed on the console in its operating position and with the safety key removed from the
console. The readings should be approximately 0
Ω
and open (
∞
) with the safety key
removed.
4.
If the readings in step 3 are incorrect, unsnap the reed switch from its mounting in the
console and repeat the measurements in step 3 using a strong hand held magnet. If the
readings are still incorrect, replace the safety key switch per Procedure 6.13. See Diagram
5.7. If the readings are now correct replace safety key.
Diagram 5.7 - Safety Key Switch
