44 4-234-23Disassembly/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)J401J905J901J902J7J6J601J602 J581J605J1204J1309 J1305J1152J1205J1202J1201J3J No. Name RelayConnectorJ No. Name REMARKSJ1152 Motor Driver PCB J1152 Main Motor -J581 Engine Controller PCB - Memory Tag -J901 Engine Controller PCB - Toner Sensor FAX model(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d)J902 Engine Controller PCB J6 Main Controller PCB -J905 Engine Controller PCB - Multi Pickup Sensor -J3 Memory Tag - Cartridge -J605 Main Controller PCB J1305 Pseudo CI PCB FAX model(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d)F-4-33J No. Name RelayConnectorJ No. Name REMARKSJ602 Main Controller PCB J1204 FAX-NCU PCB FAX model(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d)J601 Main Controller PCB J1201 FAX-NCU PCB FAX model(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d)J7 Main Controller PCB J401 Control Panel PCB -J1202 FAX-NCU PCB J1309 Pseudo CI PCB FAX model(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d)J1205 FAX-NCU PCB J1205 Speaker FAX model(MF4580dn/MF4570dn/MF4550d/MF4553d/MF4554d)T-4-33