Oki Data CONFIDENTIAL43827101TH Rev.2 198 /7.5.2.(3) Paper Feed Jam(Error 391:1st Tray)(3-1)Paper feed jam occurs right after turning on the power (1st Tray)Paper running route in frontunitCheck the sensor levers ofinlet sensors 1 and 2.Check the state of sensorsignal detection.Check the output levels ofinlet sensors 1 and 2Check the power supply ofthe front sensor PCB.Confirmation TasksOpen the front cover, and check to see if there is paper jammedon the running route.Check to see if the sensor levers demonstrate any abnormalshape or motion.Use the SWITCH SCAN function of the Maintenance Menu tocheck to see if the sensor signal is detected normally.Check the following signals through the FSNS connector of thePU PCB.Pin 4: Inlet sensor 1Pin 3: Inlet sensor 2Confirm that the above signal levels vary as the sensor leversare actuated.Check the 5-V power through the CN connector of the frontsensor PCB.Pin 5: 5V powerPin 1: 0VLAction at NGRemove the jammedpaperReplace the sensorlever with a normalone.Replace the PU PCB,front sensor PCB or theconnection cord.Replace the frontsensor PCB.Replace the connectioncord.(3-1-1) Check of state of running route(3-1-3) Check of electrical parts(3-1-2) Check of state of mechanical partsConfirmation Items(3-2)Paper feed jam occurs right after paper feeding starts (1st Tray)Paper running route in front unitCheck the sensor levers ofinlet sensors 1 and 2.Confirmation TasksCheck to see if there is paper jammed on the running route.Check to see if the sensor levers demonstrate any abnormalshape or motion.Action at NGRemove the jammedpaper.Replace the sensorlever with a normalone.(3-2-1) Check of state of running route(3-2-2) Check of state of mechanical partsConfirmation Items
