C960 Series Commercial Treadmill
Page 37
24. Measure the voltage between the red wire (term. 1 of J1) and the black wire (term 3 of J1)
on the lower PCA. The voltage should measure approximately 5 Vdc. If the voltage is 0 Vdc
or significantly low, continue with step 11. If the voltage is correct go to step 12.
25. Disconnect the J1 connector from the lower logic/lift PCA. Measure the voltage between
term.1 of J1 and term 3 of J1on the lower PCA. If the voltage is still 0 Vdc or significantly low
replace the lower logic/lift PCA. If the voltage is correct with the J1 connector disconnected,
replace the potentiometer assembly.
26. Disconnect the J1 connector from the lower logic/lift PCA. With an ohmmeter, measure the
resistance between the red wire (term. 1 of J1) and the black wire (term 3 of J1). The
measurement should be approximately 1KW. With an ohmmeter, measure the resistance
between the red wire (term. 1 of J1) and the white wire (term 2 of J1)and measure the
resistance between the white wire (term. 2 of J1) and the black wire (term 3 of J1). The sum
of the last two measurements should total approximately 1 KW.
27. If either of the two 1 KW measurements are open (•) or significantly low or high, replace the
lift motor assembly.
28. If you have performed all of the above procedures and have been unable to correct the
problem, call Precor Customer Support.
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