Oki Data CONFIDENTIAL43085101TH Rev.1 194 /7.5.2.(4) Paper Feed Jam (Error 390:Multi-purpose Tray)(4-1)Paper feed jam occurs right after turning on the power (Multi-purpose Tray)Paper running route in frontunitCheck the sensor levers ofinlet sensor 2 and WR sensor.Check the state of sensorsignal detection.Check the output levels ofinlet sensor 2 and WR sensor.Check the power supply ofthe front sensor PCB (RSFPCB).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.Use the SWITCH SCAN function of the self-diagnostic mode tocheck to see if the sensor signal is detected normally.Check the following signals through the FSNS connector of thePU PCB (PRX PCB).Pin 2: WR sensorPin 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 (RSF PCB).Pin 5: 5-V powerPin 1: 0VLAction at NGRemove the jammedpaper.Replace the sensorlever with a normalone.Replace the PU PCB(PRX PCB), frontsensor PCB (RSFPCB) or the connectioncord.Replace the frontsensor PCB (RSFPCB).Replace the connectioncord.(4-1-2) Check of state of mechanical parts(4-1-1) Check of state of running route(4-1-3) Check of electrical partsConfirmation Items
