Description: An HP detection error has occurred in relation to the fixing inlet sensor (fixing wrap jam detection).
The home position is not detected when he sensor is moved up/down (i.e., the sensor has not gone on).
Remedy: Disconnect and then connect J508, J552, and J553 of the DC controller PCB. Disconnect and then connect J4001 and J4002 of the fixing inlet sensor ascent/descent motor driver PCB; as necessary, replace the fixing inlet sensor ascent/ descent motor. Replace the fixing inlet sensor ascent/descent motor driver PCB.
Code: E840-0001
Description: An HP detection error has occurred in relation to the fixing inlet sensor (fixing wrap jam detection).
The home position is not detected when the sensor is moved up/down (i.e., the sensor has not gone off).
Remedy: Disconnect and then connect J508, J552, and J553 of the DC controller PCB. Disconnect and then connect J4001 and J4002 of the fixing inlet sensor ascent/descent motor driver PCB; as necessary, replace the fixing inlet sensor ascent/ descent motor. Replace the fixing inlet sensor ascent/descent motor driver PCB.
Code: E850-
Description: There is a fault in the double-feeding detection unit.
The double-feeding sensor (reception) fails to attain an ultrasonic signal of a specific level.
Remedy: Remove paper lint form the surface of the double-feeding sensor (reception). Remount the double-feeding sensor (transmission, reception). Disconnect and then connect J509 and J550 of the DC controller PCB. Replace the double-feeding sensor (transmission, reception). Replace the double-feeding sensor PCB (transmission, reception).