Platform Controls; Alc 500 Circuit Board - Genie Z-51/30J Service And Repair Manual

October 2020

Platform Controls

The platform control box contains one printed
circuit board. The ALC-500 circuit board inside
the platform control box controls all proportional
machine functions from the platform. The joystick
controllers at the platform controls utilize Hall
Effect technology and require no adjustment. The
operating parameters of the joysticks are stored in
memory at the ECM circuit board at the platform
controls. If a joystick error occurs or if a joystick is
replaced, it will need to be calibrated before that
particular machine function will operate. Refer to
Repair Procedure, How to Calibrate a Joystick.
Each joystick controller should operate smoothly
and provide proportional speed control over its
entire range of motion.
1 ALC-500 circuit board
2 drive/steer joystick controller
3 secondary boom up/down joystick
controller
4 primary boom up/down and turntable rotate
left/right joystick controller
Part No. 1268553GT
Platform Controls
1-1
ALC-500 Circuit Board
Note: When the ALC-500 circuit board is replaced,
the joystick controllers will need to be calibrated.
Refer to Repair Procedure, How to Calibrate a
Joystick.
How to Remove the ALC-500
Circuit Board
1 Push in the red Emergency Stop button to the
off position at both the ground and platform
controls.
2 Remove the platform control box lid retaining
fasteners. Open the control box lid.
3 Locate the ALC-500 circuit board mounted to
the inside of the platform control box.
WARNING
4 Attach a grounded wrist strap to the ground
screw inside the platform control box.
NOTICE
5 Carefully disconnect the wire connectors from
the circuit board.
6 Remove the ALC-500 circuit board mounting
fasteners.
7 Carefully remove the ALC-500 circuit board
from the platform control box.
Z®-51/31J
Service and Repair Manual
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
Component damage hazard.
Electrostatic discharge (ESD)
can damage printed circuit
board components. Maintain
firm contact with a metal part of
the machine that is grounded
at all times when handling
printed circuit boards OR use a
grounded wrist strap.
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