Precor EFX546 Service Manual download pdf (Page 28)

C546 Self Powered Elliptical Fitness Crosstrainer

Page 28

15. Refer to Diagram 6.5 for the following measurements. With an ohmmeter measure between

the “lower right contact” pin on the J1 connector and the lower right hand held heart rate

contact on the handlebar. The reading should be 1 Ω or less. Measure between the “upper

right contact” pin on the J1 connector and the upper right hand held heart rate contact on

the handlebar. The reading should be 1 Ω or less. Measure between the “upper left contact”

pin on the J1 connector and the upper left hand held heart rate contact on the handlebar.

The reading should be 1 Ω or less. Measure between the “lower left contact” pin on the J1

connector and the lower left hand held heart rate contact on the handlebar. The reading

should be 1 Ω or less. If any of the above readings are greater than 1 Ω, replace the heart

rate PCA to handlebar wire harness.

No hand held reading - No chest strap reading

16. Access the diagnostic program (Procedure 3.2). Advance to the heart rate display portion of

the diagnostic program. Verify that neither a chest strap signal or a hand held signal is being

accepted with either a heart rate test transmitter or a chest strap transmitter.

17. Check the plug/connector connections on both the heart rate PCA (J4), and upper PCA (J1).

18. If neither a chest strap signal or a hand held signal is being accepted, measure between the

“ground” and “5 Vdc” pins on J4 for 5 Vdc. If 5 Vdc is present, replace the heart rate PCA.

19. If 5 Vdc is not present, remove the connector from J4 of the heart rate PCA. Measure

between the “ground” and “5 Vdc” pins of the connector (just removed from the heart rate

PCA) for 5 Vdc. If 5 Vdc is present, replace the heart rate PCA. If the 5 Vdc is not present,

measure between the corresponding pins of J1 on the upper PCA (red and black wires). If 5

Vdc is not present replace the upper PCA. If 5 Vdc is present, replace the upper PCA to

heart rate PCA cable.

Constant or intermittent readings when neither the hand held or chest strap is in use

20. Verify that a ferrite core is clamped around the heart rate PCA to upper PCA cable.

21. Constant or intermittent heart rate readings when neither heart rate system is in use is

caused by something in the near vicinity radiating RF energy that is being received by the

chest strap portion of the heart rate PCA.

22. Temporarily, install a spare jumper on J14 of the heart rate PCA (hand held priority). Set the

on/off switch in the “on” position and repeat the procedure in step 6.

23. If the hand held signal is now being accept, something in the near vicinity is radiating RF

energy that is being received by the chest strap portion of the heart rate PCA. Disabling the

chest strap signal proves that it is radiated energy that is causing the problem.

24. The source of the radiated energy must be determined and relocated so that it no longer

affects the heart rate PCA. Televisions, cell phones, Cardio-theatre receivers, etc. are

possible sources of radiated energy.

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Precor EFX546 Service Manual Page 28