GE eBike Service Manual page 75

E: Drive Unit
Disconnect connector to power supply and IFP in-
terface - loosen connector on both sides carefully.
Adjustment of PCBRPM Board 1
Connect both cables to eddy-current brake.
Connect both cables to WSG.
Connect both connector to power supply / IFP board.
Connect ground of multimeter to outer test point (see
red arrow).
Caution: RPM board must not be connected to
ground.
No strain on cable to eddy current brake.
Connect ergometer to mains.
Connect measurement lead of multimeter to test point
tp4 (see arrow).
Adjust zero voltage with potentiometer (see circle) to
a value between 60 and 80 mV:
turn counterclockwise to decrease offset voltage
turn clockwise to increase offset voltage
Discconect ergometer from mains.
Fix RPM board again.
Perform load calibration as described with 8 kg weight
2018112-003 Rev J eBike, eBike L, eBike EL - 69 -