FS-9120DN/9520DN
2-2-3
20. Registration switch (RSW) ........................... Controls the secondary paper feed start timing.
21. Eject switch (ESW) ...................................... Detects a paper misfeed in the fuser section.
22. Feedshift switch (FSSW) ............................. Detects a paper misfeed in the switchback section in a duplex print.
23. Toner sensor (TNS) ..................................... Detects the toner density in the developing unit.
24. Toner container detection switch
(TCDSW) ..................................................... Detects the presence of the toner container.
25. Toner container sensor (TCS) ...................... Detects the quantity of toner in a toner container.
26. Waste toner box detection switch
(WTDSW) .................................................... Detects the presence of the waste toner box.
27. Overflow sensor (OFS) ................................ Detects when the toner disposal bottle is full.
28. Humidity sensor (HUMSENS) ...................... Detects absolute humidity.
29. Fuser unit thermistor 1 (FTH1) .................... Detects the heat roller temperature.
30. Fuser unit thermistor 2 (FTH2) .................... Detects the heat roller temperature.
31. Front cover switch (FRCSW) ....................... Detects the opening and closing of the front cover.
32. Conveying cover switch (CCSW) ................. Detects the opening and closing of the conveying cover.
33. Side cover switch (SCSW) ........................... Detects the opening and closing of the side cover.
34. Paper full sensor (PFS) ............................... Detects whether the face-down tray is full.
35. Duplex paper conveying switch
(DUPPCSW) ................................................ Detects a paper jam in the duplex unit.