Contents2.4.4 Maintenance Cartridge Relay PCB............................................................................................................................................ 2-442.4.4.1 Maintenance cartridge relay PCB components............................................................................................................................................. 2-442.4.5 Power Supply ............................................................................................................................................................................. 2-452.4.5.1 Power supply block diagram......................................................................................................................................................................... 2-452.5 Detection Functions with Sensors ............................................................................................................................... 2-462.5.1 Covers ........................................................................................................................................................................................ 2-462.5.2 Ink passage system..................................................................................................................................................................... 2-472.5.3 Carriage system.......................................................................................................................................................................... 2-502.5.4 Paper path system ...................................................................................................................................................................... 2-522.5.5 Others......................................................................................................................................................................................... 2-54