Precor C954i Service Manual download pdf (Page 28)

C954, C956 Treadmill

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3. Set the on/off switch in the “off” position and remove the display housing.

4. Verify the internal chest strap setting is set as shown in Diagram 5.4. Verify that a ferrite

bead is installed on the heart rate PCA to upper PCA cable.

5. If the above procedures did not correct the problem, replace the heart rate PCA.

No hand held reading - Normal chest strap reading

6. Set the on/off switch in the “on” position and access the diagnostic program (Procedure 2.1).

Advance to the heart rate display portion of the diagnostic program. Verify that a hand held

signal is not being accepted by firmly grasping both the right and left hand held contacts on

the handlebars. Cover as much of the contact surface area with your hands as possible

(without moving your hands), you should receive a heart rate reading within ten seconds.

7. If a hand held signal is not being accepted, set the on/off switch in the off position.

8. 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.

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

(radio frequency) 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.

10. If a hand held signal still not being accepted, skip to step 13.

11. 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.

12. Set the on/off switch in the “off” position, and remove the temporary jumper from J14 of the

heart rate PCA. Re-locate all potential sources of radiation. Set the on/off switch in the “on”

position and repeat the procedure in step 6.

13. Set the on/off switch in the “on” position and access the diagnostic program (Procedure 2.1).

Advance to the heart rate display portion of the diagnostic program. Verify that a hand held

signal is not being accepted by firmly grasping both the right and left hand held contacts with

the opposite hands, right hand on the left handlebar contacts and left hand on the right

handlebar contacts. Cover as much of the contact surface area with your hands as possible,

you should receive a heart rate reading within ten seconds. If a hand held signal is still not

being accepted, skip to step 15.

14. If a hand held signal was accepted in step 13, the hand held contact wiring is reversed. The

end of the wire harness that connects to the hand held contacts in the handlebar is

segregated into two groups. One group has blue shrink wrap around it and the other group

has black shrink wrap around it. The “blue” group must go to the right hand contacts and the

“black” group must go to the left hand contacts. In both groups the black wire must go to the

lower contact and the red wire must go to the upper contact. If necessary, rewire the hand

held contacts as described above and test as described in step 6.

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Precor C954i Service Manual Page 28