4 - 2 Genie Z-60/34 Part No. 75861November 2003Section 4 • Repair ProceduresREV AThe platform control box contains one printedcircuit board. The ALC-500 circuit board inside theplatform control box controls all proportionalmachine functions from the platform. The joystickcontrollers at the platform controls utilize HallEffect technology and require no adjustment. Theoperating parameters of the joysticks are stored inmemory at the ECM circuit board at the platformcontrols. If a joystick error occurs or if a joystick isreplaced, it will need to be calibrated before thatparticular machine function will operate. See 1-2,How to Calibrate a Joystick.Each joystick controller should operate smoothlyand provide proportional speed control over itsentire range of motion.a ALC-500 circuit boardb drive/steer joystick controllerc secondary boom up/downjoystick controllerd primary boom up/down andturntable rotate left/rightjoystick controller1-1ALC-500 Circuit BoardElectrocution hazard. Contactwith electrically charged circuitscould result in death or seriousinjury. Remove all rings, watchesand other jewelry.When the ALC-500 circuit board isreplaced, the joystick controllerswill need to be calibrated. See 1-2,How to Calibrate a Joystick.How to Remove the ALC-500Circuit Board1 Push in the red Emergency Stop button to the offposition at both the ground and platformcontrols.2 Remove the platform control box lid retainingfasteners. Open the control box lid.3 Locate the ALC-500 circuit board mounted to theinside of the platform control box.Electrocution hazard. Contact withelectrically charged circuits couldresult in death or serious injury.Remove all rings, watches andother jewelry.Platform Controlsbcda
