NoteActionxx2200001721Remove the electronic box screws.3xx2200001720Remove the electronic box, including all internalequipment.CAUTIONClean cover from metal residues before opening.Metal residues can cause shortage on the boardswhich can result in hazardous failures.4Disconnecting and removing the SMB unitNoteActionDANGERMake sure that all supplies for electrical power, hy-draulic pressure, and air pressure are turned off.1ELECTROSTATIC DISCHARGE (ESD)The unit is sensitive to ESD. Before handling the unitread the safety information in section The unit issensitive to ESD on page 48.2Disconnect all connectors from the SMB board.3xx2200001723Remove the screws that secure the SMB unit.4Continues on next page344 Product manual - IRB 67103HAC085695-001 Revision: A© Copyright 2023 ABB. All rights reserved.5 Repair5.6.4 Replacing the SMB unitContinued