Canon imagerunner C5180 Service Manual page 621

Code Designation / general description of error
E747 Main controller PCB error (ASIC for image processing or ASIC for memory control/
communication control)
E748 Main controller PCB error
E749 Instruction to restart accompanying change in product configuration
E751 Drum unit/toner cartridge connection trouble
E804 Controller fan error
E805 Fan error
Chapter 18
18-3