Certain parts are labeled with a letter and number code. If you encounter any paper jams or errors, use these codes to locate and correct the problem.
| 1 | Rear cover 2 (D2) |
| 2 | AC inlet |
| 3 | Rear cover 1 (D1) |
| 4 | Rear cover (E) |
| 5 | Service USB port (do not remove sticker) |
| 6 | Line port |
| 7 | EXT port |
| 8 | LAN port |
| 9 | USB port |