Description: External temperature thermistor problem--Data from the external temperature thermistor remains at F0H or above (too low a temperature or broken wire) or at 33H or less (too high a temperature or shorted wire) for 320 ms.
Code: C750
Description: Developing unit thermistor problem--Data from the developing unit thermistor remains at F0H or above (too low a temperature or broken wire) or at 33H or less (too high a temperature or shorted wire) for 320 ms.
Code: C760
Description: Toner cartridge shutter problem--The shutter home position switch fails to turn off within 10 s after the toner cartridge a shutter mode on signal has been emitted. The shutter home position switch fails to turn on within 40 s after it has turned off.
Code: C761
Description: Toner cartridge loading problem--The TCPSW1 or TCPSW2 signal falls to be input within 40 s after the toner cartridge loading motor on signal has been emitted.
Code: C762
Description: Toner hopper problem--No signal is input from the toner level detection switch after automatic toner replenishing is completed.
Code: C810
Description: Sorter feed motor problem--A feed motor problem--A feed motor jam is detected (with the stapler-sorter attached). The feed motor current exceeds 2 A for 50 ms (with the sorter attached).
Code: C811
Description: Sorter feed motor circuit problem--No feed motor index signal is detected for 30 ms (with the sorter attached).
Code: C820
Description: Sorter bin drive motor problem--The sorter bin unit fails to return to the home position during initialization (with the stapler-sorter attached). The sorter shift motor current exceeds 1.2 A for 50 ms (with the sorter attached).