Inspection And Adjustment Procedures; Measuring The Resistance Of A Generator - Precor EFX 885 Service Manual

EFX 885, 835, 825
Service Manual 20039-166
Section Eight - Inspection and Adjustment Procedures
Procedure 8.1 - Measuring the Resistance of a Generator
Caution
If a external power supply is connected to the EFX, disconnect the external power supply from the EFX before
continuing with this procedure.
Procedure
Remove the screw at the right rear of the rear cover. Grasp the right side of the rear cover and rotate it
counterclockwise to remove the cover. Refer to Procedure 10.1.
Remove the two screws that retain the black plastic shield. Remove the black plastic shield from the EFX.
Remove the red battery lead from the lower PCA. See Diagram 10.3.1
WARNING
Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You
Should Know.
Set the ohmmeter to a range that will conveniently read up to 50 W.
Remove the six phase generator connector from the lower PCA, refer to Diagram 8.1.1, below.
With an ohmmeter, read between terminals 1 & 2, terminals 1 & 3, terminals 1 & 5, terminals 1 & 6, and terminals 1 & 7
on the six phase generator connector (J1). Each of the readings should be between 36 W and 40 W.
If any of the readings are significantly high or significantly low, remove the intermediate cable from the generator and
perform the same measurements as in step 4 on the generator connector. If the reading is now correct check and or
replace the intermediate cable. Refer to Diagram 8.1.1. If the readings are still incorrect, remove the six phase generator.
Replace the generator per Procedure 10.17. Reconnect the intermediate cable removed in step 5 to the replacement
generator and the lower PCA.
Reconnect the red battery lead to terminal M6 of the lower PCA.
set the black plastic shield in its mounting position and fasten it with the screws removed in step 2.
Set the right side of the rear cover in its mounting position and rotate it clockwise. Ensure that the cover is fully engaged
and fasten it with the screw removed in step 1.
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