Certain parts are labeled with a letter and number code. If you encounter any paper jams or errors, you can use these codes to locate and correct the problem when a message appears on the LCD screen.
| 1 | Document cover |
| 2 | Scanner glass |
| 3 | Multi-purpose (MP) tray edge guide |
| 4 | Multi-purpose (MP) tray (B) |
| 5 | Paper cassette edge guides |
| 6 | Faceup paper eject tray (G) |
| 1 | Ink cartridge cover (A) |
| 2 | Front cover (L) |
| 3 | Cleaner tool storage (can be used to clean scanner glass) |
| 4 | Ink cartridges (WF-C17590/WF-C20590: Cyan/Magenta/Yellow/Black x2; WF-M20590/WF-M20590F: Black x2) |
| 5 | Maintenance box |
| 6 | Maintenance box cover (H) |
| 7 | Duplexing unit (D1) |