Stairmaster 4200 PT, 4600 PT/CL manual Diode Test, Resistor Test, 4600/4400 CL Battery Test, Page

ELECTRICAL TROUBLESHOOTING

•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 (see Final Assembly Figure) 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 %) .

4600/4400 CL

Battery Test

1.Remove the mid cover and top covers and unplug the battery from the power control board. Locate pins #1 & 2 in the end of the cable. Use a voltmeter to verify that the voltage is a minimum of 6.1 VDC. Reconnect the battery back to the power control board and install the battery charger for at least 24 hours if the voltage measured is below 6.1 VDC. Note: You can use the machine while the battery recharger is connected.

2.Remove the console knobs from the back of the console, lift the console up, and disconnect the main cable from the console.

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