JLG X390AJ Operator Manual - Manual (Page 50)

SECTION 4 - MACHINE OPERATION
4-6 – JLG Lift – 3128792
4.4 BASE AND BOOM/JIB ALIGNMENT
The machine has two reflectors/photocells that check if the
boom assembly is completely lowered and retracted, the jib is
lowered, and the turntable is aligned with the base. (see pho-
tos)
When these conditions are met this symbol will
display in position (6) on the Platform/Remote
Control LCD display.
UNLESS THESE CONDITIONS ARE MET, DRIVE, STEER
AND OUTRIGGER MOVEMENT IS PREVENTED.
Base/Boom Alignment - Visual Indicator
Boom/Jib and Base Alignment - Reflectors/Photocells