Precor C954i Service Manual download pdf (Page 24)

C954, C956 Treadmill

Page 1-24 Page 24

4. If the voltage is missing or significantly low, disconnect the speed sensor plug from the lower

PCA. Measure the voltage between pins 1 & 4 of the J2 plug on the lower PCA. If the

voltage is approximately 5 Vdc, replace the speed sensor. If the voltage is missing or

significantly low, replace the lower PCA.

5. At this point the speed sensor output is good, but a speed error occurs. There are two

potential causes for this condition. They are upper PCA or lower PCA. There are no good

means of troubleshooting these components other than substituting known good

components. Replace only one component at a time. If the component that you replaced

does not correct the problem, replace the original component. Try substituting the lower

PCA first then the upper PCA, if necessary.

6. 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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Precor C954i Service Manual Page 24