44 4-764-76Disassembly/Assembly > Controller System > Removing the Main Drive Unit > ProcedureDisassembly/Assembly > Controller System > Removing the Main Drive Unit > ProcedureRemoving the Main Drive Unit■ Preparation1) Removing the Right Cover. Refer to page 4-20.2) Removing the Left Cover. Refer to page 4-17.3) Removing the Right Front Cover. Refer to page 4-22.4) Removing the ADF Unit + Reader Unit. Refer to page 4-32.5) Removing the Rear Upper Cover. Refer to page 4-24.6) Removing the Upper Cover. Refer to page 4-28.7) Removing the Wireless LAN PCB.(MF8580Cdw only) Refer to page 4-57.8) Removing the Main Controller PCB. Refer to page 4-58.9) Removing the Main Controller Support Plate. Refer to page 4-61.10) Removing the Drum Motor. Refer to page 4-102.11) Removing the Developing Motor. Refer to page 4-10012) Removing the Driver PCB. Refer to page 4-10.13) Removing the FAX PCB. (FAX model only)Refer to page 4-75.14) Removing the Fixing/Fixing Power Supply Cooling Fan Unit. Refer to page 4-86.15) Removing the Fixing Sub PCB. Refer to page 4-67.16) Removing the Fixing Motor Unit. Refer to page 4-11117) Removing the Low Voltage Unit. Refer to page 4-65.18) Removing the DC Controller PCB. Refer to page 4-6119) Removing the Relay PCB. Refer to page 4-6920) Removing the Off Hook PCB.(FAX model only)Refer to page 4-75■ Procedure1) Remove the Harness Guide and plate [1].• 1 Connector [2]• 1 Harness Guide [A]• 2 Screws [3][1][1][2][3][3][A] x2F-4-155