Service Manual KM C4070/C4080 Follow
Link of Service Manual: AccurioPressC4080_C4070_PrintC4065ServiceManual.pdf
This is the Service Manual of KM C4070/C4080, it will help you to find solutions to all the Error codes may encounter. Also, it can guide you in dissembling and assembling specific parts of the machine, including machine peripherals such as Finisher Unit (FS) and Paper Feed Unit (PF).
It may serve as a tool for you to know all the components and parts of the machine and how you can maintain every parts.