5.17 Ellipitical Fitness Crosstrainer
Page 20
lower PCA. The measurement should be approximately 5 Vdc. If the measurement is
correct, skip to step 4. If the voltage is missing or significantly low, disconnect the speed
sensor and repeat the measurement on the J2 connector. If the measurement is now correct
(5 Vdc), replace the speed sensor. If the voltage is still missing or significantly low, replace
the lower PCA. Skip to step 5.
4.
Rotate the step up pulley so that the speed sensor magnet is next to the reed switch. Using
a DC voltmeter, measure the voltage between terminal 1 and terminal 2 of J2 on the lower
PCA. The measurement should be approximately 0 Vdc. If the voltage is 5 Vdc or
significantly high, replace the speed sensor.
5.
With the DC voltmeter connected to terminals 1 and 2 of J2 on the lower PCA, rock the step
up disk forward and backward so that the magnet is passing in front of and away from the
reed switch. The DC voltmeter should alternate between 0 Vdc and 5 Vdc. If the voltage
measurement does not alternate between 0 Vdc and 5 Vdc, repeat steps 2 through 4. If the
voltage does alternate between 0 Vdc and 5 Vdc, continue with step 6.
6.
If you have performed all of the above tests and the stride rate is not displayed when the unit
is operated, there are three parts that could cause the problem. There are not any good
tests to check these parts other than substituting a known good part. They are lower PCA,
interconnect cable and upper PCA. Replace only one part at a time. If the new part does not
correct the problem, replace the original part.
7.
If you have performed all of the above tests and the speed sensor is still not functioning, call
Precor Technical Support.
