Oki C711DW Maintenance Manual - Page 168

Oki Data CONFIDENTIAL 7. Troubleshooting and repair procedure (6-4) Jam occurs immediately after paper has reached the fuser. Check item (6-4-1) Motor operation check Check work Action to be taken at NG Fuser motor C onfirm that the fuser motor works normally by using the Motor & Clutch Test of the selfdiagnostic mode. Check if any load exists or not. R eplace the CU/PU board. Replace the fuser motor. Replace the fuser unit. If any attempt of using new fuser unit as a trial is going to be made, be sure to use the System Maintenance Menu FUSE KEEP MODE. (6-4-2) Temperature control of the roller rotation speed Heat roller detected temperature Check the detected temperature of the heat roller using the self-diagnostic mode. Is abnormally high temperature or abnormally temperature detected? Replace fuser unit, or relay board (PRY PCB) or the CU/PU board. If any attempt of using new fuser unit as a trial is going to be made, be sure to use the System Maintenance Menu FUSE KEEP MODE. (6-4-3) Check the installation condition of fuser unit Fuser unit Check that the fuser unit is installed normally. (Is it pushed in down to the bottom-most point?) Install the fuser unit correctly in a printer. 7.5.2. (7) Paper unloading jam (error code 382) (7-1) Paper unloading jam occurs immediately after the power is turned on. Check item Check work (7-1-1) Check condition of the paper running path Action to be taken at NG Paper running path of Check if paper is jammed or not in the paper the paper unloading running path. unit R emove the jammed paper. (7-1-2) Check condition of the mechanical parts Check the sensor Check if shape and movement of the sensor lever of the paper exit levers have any abnormality or not. sensor. R eplace the sensor lever with the good sensor lever. (7-1-3) Check condition of electrical parts 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. R eplace the CU/PU board or EXIT sensor or its cable or its connection cable. Check the output signal level of the EXIT sensor. Check for the following signals at the RELAY connector of the CU/PU board. Pin-9: EXIT sensor Confirm that the above signal levels change when the sensor lever is operated. Replace the EXIT sensor.  Check the power voltages supplied to the relay board. Check the 5V power voltage at the EXIT connector of the relay board. Pin-1: 5V power supply Pin-3: 0VL Replace the connection cable. 44205401TH Rev.1 168 /