Precor Experience 700 line Series, Service Manual

Page: 195 / 232

CAUTION : All resistance measurements must be performed with power removed
from the machine. Performing the resistance measurements with voltage applied to
the circuit can damage the multimeter.
6. Switch the treadmill ON/OFF switch to OFF. Disconnect the Drive Motor cable con-
nector from the MC MOTOR output connector. Set the multimeter to measure res-
istance (ohms). Measure resistance between the Drive Motor cable MC MOTOR
connector between the red wire (pin 4) & white wire ( pin 5), the red wire (pin 4) & black
wire (pin 6) and the white wire (pin 5) & black wire (pin 6). Each measurement should
be approximately 2.5 ohms. If any one of the measurements are significantly high (an
open circuit) or zero (a short circuit), replace the Drive Motor.
CAUTION : Connector pin terminals can be easily sprung and damaged. Take care
and use light probe contact pressure when making multimeter measurements. DO
NOT insert large diameter probes into the plug terminals which will spring and dam-
age the pin terminals.
7. If the Drive Motor passed the motor winding resistance test, inspect the female pins of
the Drive Motor cable MC MOTOR connector. Verify that the pins are not spread apart
"sprung" beyond the point of making good contact with the MC MOTOR connector male
pins. If the Drive Motor connector pins are damaged, attempt to repair the connector ter-
minals using a crimp tool for a MOLEX plug #39--01-2060 with pin terminals MOLEX
#45750-3111 (recommended MOLEX pn 0457503112 crimp tool). If the connector can-
not be repaired, replace the Drive Motor.
8. If you have performed all of the procedures above and have been unable to correct the
problem, call Precor customer support.
See Also
"System Troubleshooting Procedures" on page 166
Page 187
6 Troubleshooting
System Troubleshooting Procedures