44 4-224-22Disassembly/Assembly > List of Connectors > 2-sided Printer Unit (MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d/D550/D520)Disassembly/Assembly > List of Connectors > 2-sided Printer Unit (MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d/D550/D520)Reader UnitJ5J11J No. Name RelayConnector J No. Name REMARKSJ5 Main Controller PCB - CIS UNIT -J11 Main Controller PCB J11 Reader Motor -F-4-31T-4-312-sided Printer Unit(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d/D550/D520)J701J552J101J702 J802J1154J542 J801J1153J571J562J751J551J1102J1103J1101J1151J No. Name RelayConnector J No. Name REMARKSJ1101 Duplex Driver PCB J1154 Motor Driver PCB -J1102 Duplex Driver PCB J1102 Duplex Solenoid -J1103 Duplex Driver PCB J1103 Main Fan Unit -J1151 Motor Driver PCB J571 Engine Controller PCB -J1153 Motor Driver PCB J802 Laser Scanner Motor -J801 Laser Driver PCB J542 Engine Controller PCB -J101 Engine Controller PCB - Fixing Film Unit -J551 Engine Controller PCB J751 Paper Leading Edge Sensor -J552 Engine Controller PCB J701 Fixing Delivery/Paper WidthSensor PCB-J562 Engine Controller PCB J562 Pickup Solenoid -J702 Fixing Delivery/Paper WidthSensor PCB- Fixing Film Unit -F-4-32T-4-32