9.23, 9.27 Treadmill
20081-118 Page 25
Procedure 5.5 - Troubleshooting the Safety Key Circuit
1. Set the on/off switch in the “off” position and remove the console from the backplate from the
console. Refer to Diagram 5.2.
2. Remove the JK7 connector from the upper PCA.
3. With an ohmmeter, measure between the two pins of the JK7 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 0Ω with the safety key installed and open
(∞) with the safety key removed.
4. If the readings in step 3 are incorrect, replace the JK7 connector on the upper PCA and
remove the push on connectors from the safety switch. Measuring between the terminals on
the safety switch with an ohmmeter, repeat the measurements in step 3
Diagram 5.7 - Safety Key Switch
5. If the measurements are still incorrect replace the safety switch. If the measurements are
now correct, replace the safety switch to upper PCA cable.
JK7 Connector
Safety Switch
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