02/20002-43DocuPrint N2125 RAP 50 , RAP 51Status Indicator Repair Analysis ProceduresInitial IssueRAP 50 Load MBF (C5)ProcedureEnter Diagnostics and select Component Test. Scroll to Sensor Input test and press Enter.Actuate and deactuate the MBF No Paper Sensor. The number on the LCD incrementseach time you press and release the actuator.Y NThe actuator moves freely and is in good condition (not broken or damaged).Y NReplace the MBF No Paper Sensor Actuator (REP 4.5).Switch the printer power off. Remove the Left Interface Cover (REP 1.1), Left Cover (REP1.2), and the Left Plate Assembly (REP 1.11). Switch the printer power on. On the PrintEngine Controller PWB, measure the voltage between P/J23 pin 14 and frame ground.The voltage is +3.3VDC with the MBF No Paper Sensor deactuated and 0.0VDC withthe Sensor actuated.Y NSwitch the printer power off. Remove the Left Front Cover (REP 1.7). Switch theprinter power on. On the Connector PWB, measure the voltage between P/J45 pin 3and frame ground. The voltage is +3.3VDC with the MBF No Paper Sensor deac-tuated and 0.0VDC with the Sensor actuated.Y NCheck the voltage between P/J45 pin 1 and frame ground. The voltage is1.2VDC.Y NReplace the Print Engine Controller PWB (REP 9.3).Replace the MBF No Paper Sensor (REP 4.8).Replace the Connector PWB (REP 9.7).Replace the Print Engine Controller PWB (REP 9.3).It appears that the MBF No Paper Sensor is working correctly. If a problem persists, replace thePrint Engine Controller PWB (REP 9.3).RAP 51 Face Up Tray Open (E5)ProcedureOpen the Rear Cover. The printer has a Duplex Unit installed.Y NReplace the Print Engine Controller PWB (REP 9.3).Check the Face Up Tray Sensor Actuator on the Rear Cover. The actuator is in good condi-tion.Y NReplace the Rear Cover (REP 1.8).Cheat the Rear Cover Interlock. Enter diagnostics and select Component Test. Scroll to SensorInput Test and press Enter. Use a piece of paper to block and unblock the Face Up Tray Sen-sor. The number on the LCD increments each time you block and unblock the sensor.Y NOn the Face Up Tray Sensor, check the voltage between pin 1 (pin to the rear of theprinter) and frame ground. The voltage is 0.0VDC with the sensor unblocked and3.3VDC with the sensor blocked.Y NCheck the voltage between pin 3 on the sensor and frame ground. The voltage is1.2VDC.Y NSwitch the printer power off. Remove the Left Interface Cover (REP 1.1), LeftCover (REP 1.2), and the Left Plate Assembly (REP 1.11). Switch the printerpower on. On the Print Engine Controller PWB, check the voltage between P/J34 pin 11 and frame ground. The voltage is 1.2VDC.Y NReplace the Print Engine Controller PWB (REP 9.3).Check the wiring harnesses. If the harnesses are in good condition, replace theDuplex PWB (REP 12.4).Replace the Face Up Tray Sensor (REP 12.14).Switch the printer power off. Remove the Left Interface Cover (REP 1.1), Left Cover (REP1.2), and the Left Plate Assembly (REP 1.11). Switch the printer power on. On the PrintEngine Controller PWB, check the voltage between P/J34 pin 11 and frame ground. Thevoltage is 0.0VDC with the sensor unblocked and 3.3VDC with the sensor blocked.Y NCheck the wiring harnesses. If the harnesses are in good condition, replace theDuplex PWB (REP 12.4).Replace the Print Engine Controller PWB (REP 9.3).Replace the Print Engine Controller PWB (REP 9.3).
