1. Cassette paper feed section
2. MP tray paper feed section
3. Paper conveying section
4. Optical section
5. Laser scanner unit (LSU)
6. Developer unit
7. Toner container section
8. Drum unit
9. Transfer/Separation sections
10. Fuser/Eject/Feed shift section
11. Duplex section (option)
12. PF paper feed section (option)
13. DP paper feed section (option)
14. DP paper conveying section (option)
15. DP feed shift section (option)