02/20002-33DocuPrint N2025/N2825 RAP 31Status Indicator Repair Analysis ProceduresInitial IssueRAP 31 Fuser AssemblyProcedureWARNINGIf the printer has been switched on, the fuser may be hot.Switch the printer power off. Remove the Fuser Assembly (REP 5.1). Measure the resistancebetween pins A1 & A2 and between pins 2 and 4 or 1 and 4 of P174 on the Fuser Assembly(Figure 1). The resistance between A1 and A2 reads between 10K and 350K ohms(depending on the temperature of the fuser) and the resistance between pins 1 and 4reads less than 5 ohms.Y NReplace the Fuser Assembly (REP 5.1).Figure 1 Fuser Connector (P174)Reinstall the Fuser Assembly. Remove the Lower Rear Cover (REP 1.7). Disconnect P/J172from the Fuser PWB. Ensure that the Rear Cover is closed. Check the continuity betweenP172 pin 1 and P172 pin 3. There is continuity between P172 pin 1 and P172 pin 3.Y NRemove the Right Side Cover (REP 1.2). Ensure that the Rear Cover is closed. Checkcontinuity between P/J172 pin 3 and both sides of the Rear Cover Interlock Switch.There is continuity between P/J172 pin 3 and both sides of the Rear Cover InterlockSwitch.Y NRepair or replace the Fuser Wiring Harness (PL 9.2) or replace the Rear Cover Inter-lock Switch as necessary (PL 9.2).Replace the Fuser Harness Assembly (PL 9.2).Remove the Left Side Cover (REP 1.1) and the Print Engine Controller PWB Cover (REP 8.5).Disconnect P/J17 from the Print Engine Controller PWB. Check for continuity between P17 pin7 and P17 pin 8. There is continuity between P17 pin 7 and P17 pin 8.Y NReplace the Fuser Harness Assembly (PL 9.2).Disconnect P/J171 from the Fuser PWB. Check for continuity between P17 pin 3 and P171 pin1, P17 pin 2 and P171 pin 2 and P17 pin 1 and P171 pin 3. There is continuity between allpins measured.Y NReplace the Fuser Harness Assembly (PL 9.2).Reconnect P/J171, P/J172, and P/J17. Switch the printer power on. Measure the voltagebetween J17 pin 2 on the Print Engine Controller PWB and frame ground. The voltage in 3.3VDC.Y NMeasure the voltage between P/J16 pin 4 on the Print Engine Controller PWB and frameground. The voltage in 3.3 VDC.Y NReplace the LVPS (REP 8.6).Replace the Print Engine Controller PWB (REP 8.5).Replace the Fuser PWB (REP 8.8). If the problem persists, replace the Print Engine ControllerPWB (REP 8.5).AA
