Stairmaster Crossrobics 1650 LE, Owner'S Manual

Page: 50 / 108

Page 41
ELECTRICAL TROUBLESHOOTING
10. If all voltage readings have been within the specified range and the
console will not power up, the console should be replaced.
Alternator Test
11. Check for loose wiring connections on the alternator, diode, and load
resistor.
12. Perform the Positive Output to Field test on the alternator:
• Disconnect the power cord from the electrical outlet.
• Remove the black wire from the B+ terminal on the alternator.
• Remove the brown wire from the field terminal on the alternator.
• Place a short wire with alligator clips on the B+ terminal and the
field (FLD) terminal of the alternator.
• Step on the machine for approximately 10 to 15 seconds.
• If full resistance is achieved during this time, your alternator
has correct current flow. If no resistance is achieved, replace
the alternator.
Diode Test
13. Remove the brown wire and diode from the field terminal of the
alternator and set your voltmeter to the Ohms setting.
14. Place one lead from the voltmeter on each end of the diode, and then
reverse the leads. A diode that is good will show a high reading in
one direction and a low reading when the leads are reversed.
Replace the diode if the readings recorded are both high or both low.
Resistor Test
15. Remove one wire from the load resistor and place one lead from the
voltmeter on each of the threaded posts on the load resistor. Replace
the load resistor if the voltmeter does not read 0.5 Ohms (
± 10
%
)
.