JLG 1200SJP Service Maintenance Manual page 450

SECTION 6 - JLG CONTROL SYSTEM
26. Press Enter. The screen will read:
Swing the machine back 180 degrees (centered over
original end of chassis) for Calibration Position 4.
Figure 6-17. Boom Sensor Calibration Position 4
6-74
When the machine is in the proper position, hit Enter.
The screen will read:
When Position 4 calibrating is complete, the screen will
read:
– JLG Lift – 3121142