Stairmaster FREERUNNER 5600, Owner'S Manual

Page: 52 / 111

Page 43
TROUBLESHOOTING
6. Locate the black and white power connector wires on the power control
board. Unplug the connector from the board and verify approx.
15-16 VDC between pin #1 (negative) and pin #2 (positive). Replace the
power connector if the reading is under the specified range or no
voltage reading at all.
7. Verify that all of the alternator connections are tight and in the correct
location.
8. Inspect the power control board for loose connections.
9. Remove the console and use a multimeter to measure approx 15-16 VDC
between pin #1 (negative) and pin #10 (positive) of the upper main
cable (see diagram below). If no voltage is displayed, look at LED #1
(Vsupply) on the lower power board and verify that is lit (see page 40). If
it is lit, disconnect the main cable from the power board and measure
approx. 15-16 VDC between pin #10 (negative) and pin #2 (positive) on
the main cable connector J1 of the power board. If the voltage is
correct, replace the upper and lower main cables. If there is no voltage,
replace the power board.
10. If all voltage readings have been within the specified range and the
console will not power up, the console should be replaced.
11. Perform the following Positive Output to Field test on the alternator:
• Turn the power off.
• Disengage the brake.
• Remove the white wire from the B+ terminal on the alternator.
• Remove the brown wire from the field (FLD) terminal on the
alternator.