Procedure 6.5 - Upper Display Does Not Illuminate - Precor EFX5.31 Instruction Manual

Procedure 6.5 - Upper Display does not Illuminate

Note:
If the control circuit does not see an output from the speed sensor, it removes power from the
eddy current system. Therefore, when it is necessary to check the resistance or take voltage
measurements in the eddy current system it will be necessary to slowly turn the flywheels to
ensure that the power time out has not occurred.
WARNING
1. Before continuing with this procedure, review the Warning and Caution statements listed in
Section One, Things You Should Know
1. Set the on/off switch in the "off" position, unplug the line cord from the wall outlet.)
2. Remove the fuses from the power entry module. (See Procedure 7.24)
3. Check all of the fuses with an ohmmeter. They should read less than 1Ω . Replace any fuse
that reads significantly high. See Procedure 7.24.
4. With the line cord still unplugged from the wall outlet, set the on/off switch in the "on"
position. Check between the power terminals of the line cord with an ohmmeter. The
ohmmeter should read 1 to 1.5 megohm.
5. If the reading is good, skip to step 10, if the reading is significantly low, continue with the
next step
6. If the reading in step 4 is significantly low, check the wiring between the lower PCA and the
on/off switch, between the on/off switch and the input module. Replace any cut or nicked
wiring.
7. Check the line cord for nicked or cut wiring. Replace the line cord if necessary.
8. If the reading in step 4 is still significantly low, replace the lower PCA
9. If you have performed all of the above tests and are unable to resolve the problem, contact
Precor customer support.
10. Plug the line cord into the wall outlet and set the on/off switch in the "on" position.
11. Measure between terminals 2 & 3 (white and violet wires) of the HR output connector on the
HR PCA with a DC voltmeter. See Diagram 6.3. The reading should be approximately 5.0
Vdc.
12. If the reading in step 11 is good, replace the upper PCA. If the reading in step 12 is
significantly low, set the on/off switch in the "off" position. Disconnect the data cable from the
upper PCA.
13. Set the on/off switch in the "on" position.