OKI C331

Jam occurs immediately after the power is turned on. (Multipurpose tray)

Check condition of the paper running path

Check item	Check work	Actions to be taken at NG
Paper running path of the multipurpose tray	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
IN sensor and WR sensor lever check	Check the sensor lever shapes and operations for any problem	Replace the sensor lever(s) with proper one(s)

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 CU/PU board, or appropriate sensor(s) or connection cord(s).
In sensor and WR sensor output level check	Check the following signals by using the CU/ PU board RGSNS connector 16: Pin 2: WR sensor Pin 5: IN sensor Confirm that the above signal levels change when the sensor lever is operated.	Replace the connection cable.