June 2017 Service and Repair ManualGround ControlsPart No. 1268497 SX-180 792 Turn and hold the bypass/recovery key switchto the recovery position. The switch must beheld in the recovery position.Result: The auxiliary power unit will turn onand the boom will begin the following recoverysequence.• The primary boom will retract.• The primary boom will lower.Note: The key switch must be held in the recoveryposition until the recovery sequence is complete oruntil the operator in the platform can safely exit theplatform.Note: If any boom safety limit switches are faulty,the boom will only retract and not lower and theoperator will need to be recovered from that point.Note: If the Recovery function has been used, thismay indicate there may be faults with the machine.Tag and remove the machine from service until thefault has been corrected by trained personnel.6-2Circuit BoardsThe ground control box contains a replaceablemembrane decal with touch sensitive buttons forvarious machine functions. The ground control boxalso contains two printed circuit boards:The LCD (Liquid Crystal Display) circuit boardis mounted to the inside of the control box lid whichcontrols the LCD display screen.The ECM circuit board is the main circuit boardfor the machine. All operating parameters andconfiguration of options for the machine are storedin the ECM memory.Note: When the ECM circuit board is replaced, thejoysticks will need to be calibrated. Refer to RepairProcedure, How to Calibrate a Joystick.Note: When the ECM circuit board is replaced, allthe boom, platform and axle angle sensors willneed to be calibrated and in a specific order.Contact Genie Product Support.How to Remove the LCD DisplayScreen Circuit Board1 Push in the red Emergency Stop button to theoff position at both the ground and platformcontrols.2 Remove the ground control box lid fasteners.3 Open the ground control box.Electrocution/burn hazard.Contact with electrically chargedcircuits could result in death orserious injury. Remove all rings,watches and other jewelry.
