JLG TF6-42 Service Manual - Manuale (Pagina 739)

T12000 ID 04/99 7-11
7.6 SPEED SENSOR - STATIC STANDALONE TEST
In order to be able to sense the currents, a series resistor of e.g. 200 Ohms must be used. This resistor is
integrated in the controller, but when the sensor is to be tested, it must be connected externally.
The idea is to connect the sensor to an external power source and measure the DC voltage across the series
resistor.
The voltage reading should be either 1.2V-1.6V (for the 7mA
± 1mA current level) or 2.6-3.0V
(for the 14mA
± 1mA current level)
If the teeth can be moved slowly, distinct toggling between the two levels should be noticed.
Troubleshooting guide