02/20002-32 DocuPrint N2125RAP 30 , RAP 31Initial IssueStatus Indicator Repair Analysis ProceduresRAP 30 Laser AssemblyProcedureEnter Diagnostics and select Component Test. Scroll to ROS Motor and press Enter. You canhear the ROS Motor spin up.Y NSwitch 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. Check the volt-age between P/J21 pin 10 on the Print Engine Controller PWB and frame ground. Thevoltage is 24.0 VDC.Y NCheck the voltage between P/J28 pin 1 on the Print Engine Controller PWB andframe ground. The voltage is 24.0 VDC.Y NReplace the LVPS (REP 9.5).Replace the Print Engine Controller PWB (REP 9.3).Enter Diagnostics and select Component Test. Scroll to ROS Motor Operation. Check thevoltage between P/J21 pin 12 and frame ground. Press the Enter key. The voltagedrops from 5.0 VDC to 0.0 VDC.Y NReplace the Print Engine Controller PWB (REP 9.3).Replace the Laser Assembly (REP 7.4).Switch the printer power off. Remove the Left Interface Cover (REP 1.1) Left Cover (REP 1.2),and the Left Plate Assembly (REP 1.11). Switch the printer power on. Check the voltagebetween P21 pin 6 and frame ground. The voltage is +5.0VDC.Y NCheck the voltage between P/J28 pin 7 and frame ground. The voltage is +5.0VDC.Y NReplace the LVPS (REP 9.5).Check the voltage between P/J25 pin 3 and frame ground. The voltage is +5.0VDC.Y NGo to RAP 36.Replace the Print Engine Controller PWB (REP 9.3).Measure the voltage between P/J21 pin 9 and frame ground. The voltage is +5.0VDC.Y NReplace the Print Engine Controller PWB (REP 9.3).Replace the Laser Assembly (REP 7.4).RAP 31 Fuser AssemblyProcedureWARNINGIf the printer has been switched on, the fuser may be hot.Switch the printer power off. Remove the Fuser Assembly (REP 6.2). Measure the resistancebetween pins A4 and A5 of P272 (Figure 1). The resistance is between 7K and 380K ohms(depending on the temperature of the fuser).Y NReplace the Fuser Top Cover (REP 6.9).Measure the resistance between pins 3 and 4 of P272 on the Fuser Assembly (Figure 1). Theresistance is less than 5 ohms.Y NRemove the Fuser Heat Rod (REP 6.9). Measure the resistance of the Heat Rod. Theresistance is less than 5 ohms.Y NReplace the Heat Rod (REP 6.9).Replace the Fuser Top Cover (REP 6.9).Figure 1 Fuser Connector (P272)Reinstall the Fuser Assembly. Remove the Left Interface Cover (REP 1.1), Left Cover (REP1.2), and the Left Plate Assembly (REP 1.11). Disconnect P/J11 from the LVPS PWB. Checkthe resistance between P11 pin 1 and pin 2. There is less than 5 ohms resistance.Y NRepair or replace the Fuser Harness Assembly (REP 6.3).Reconnect P/J11 and disconnect P/J27. Measure the resistance between P/J27 pins 1 and 2(Figure 1). The resistance is between 7K and 380K ohms (depending on the temperatureof the fuser).Y NRepair or replace the Fuser Harness Assembly (REP 6.3).A
