OKI C931

Jam occurs immediately after the power is turned on.

Check condition of the running path.

Check item	Check work	Actions to be taken at NG
Paper running path between the registration roller 2 and the fuser	Check if paper is jammed or not in the paper running path.	Remove the jammed paper.

Check condition of the mechanical parts

Check item	Check work	Actions to be taken at NG
Check the sensor lever of the paper entrance sensor 3.	Check if shape and movement of the sensor levers have any abnormality or not.	Replace with a normal sensor lever.

Check condition of electrical parts

Check item	Check work	Actions to be taken at NG
Check the detection condition of the sensor signal.	Confirm that the sensor signals are normally detected by using the SWITCH SCAN function of the self-diagnostic mode.	Replace the PU/CU PCB or connection cable.