REV CSection 4 • Repair Procedures June 20054 - 22 TMZ-34/19 Part No. 520755-3Connector Circuit BoardThe connector circuit board connects the wireharness to the CPU circuit board using severalcables. From serial number T3498-001 toT3499-769, the connector circuit board is equippedwith a replaceable 5 amp fuse.How to Removethe Connector Circuit Board1 Disconnect the battery pack from the machine.Electrocution hazard. Contact withelectrically charged circuits couldresult in death or serious injury.Remove all rings, watches andother jewelry.2 Tag and disconnect the wire harnessconnectors from the ground control box.3 Remove the four lid retaining fasteners from theground control box. Open the lid.4 Tag and disconnect all wiring from theconnector circuit board.Component damage hazard.Electrostatic discharge (ESD) candamage printed circuit boardcomponents. Maintain firm contactwith a metal part of the machinethat is grounded at all times whenhandling printed circuit boards ORuse a grounded wrist strap.5 Remove the connector circuit board mountingfasteners and remove the connector circuitboard.5-2CPU Circuit BoardThe CPU circuit board controls all machinefunctions.How to Removethe CPU Circuit Board1 Disconnect the battery pack from the machine.Electrocution hazard. Contact withelectrically charged circuits couldresult in death or serious injury.Remove all rings, watches andother jewelry.2 Remove the four lid retaining fasteners from theground control box. Open the lid.3 Tag and disconnect all wiring from the CPUcircuit board.Component damage hazard.Electrostatic discharge (ESD) candamage printed circuit boardcomponents. Maintain firm contactwith a metal part of the machinethat is grounded at all times whenhandling printed circuit boards ORuse a grounded wrist strap.4 Remove the CPU circuit board mountingfasteners and remove the CPU circuit board.GROUND CONTROLS800-610-4101ActionRental.com
