Nautilus StairMaster ClubTrack 2100 Series Service Manual page 87

Checking Resistance
Use this procedure to check for broken wires:
1 Set the multimeter to the lowest OHMs (resistance) range.
2 Attach the test leads on both ends of the wire being tested.
3 Observe the reading.
• A short circuit will read less than approximately 3 ohms. This is the correct reading for an undamaged wire.
• An open circuit will usually read infinite; on a digital meter it will have an error code. This signals a broken
or cut wire.
Use this procedure to test for crossed wires. In most circumstances all indivudual wires in a cable will be
insulated from each other. When a wire is pinched, it becomes short circuited to an adjacent wire. This can
cause problems resulting in blown fuses or fried components.
1 Set the multimeter to the lowest OHMs (resistance) range.
2 Attach one test lead of the multimeter to one wire and check all adjacent wires. This can all be done at
one end of the cable. However, the other end of the cable must be disconnected from the circuit board.
All wires should be insulated from each other and therefore test open.
3 Observe the reading.
Checking Voltage
Use this procedure to check voltage output:
1
Determine whether the voltage is AC or DC voltage, and choose the appropriate setting on the
multimeter.
2
Set the multitmeter to the lowest setting that is still higher than the highest output of the component
being tested.
3 Place the black and red leads or probes on the appropriate corresponding wires, pins, or connectors.
4 Observe the reading, and proceed according to the troubleshooting sections in this manual.
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ClubTrack 2100 Series Treadmill Service Manual
Appendix D
82