02/20002-42 DocuPrint N2025/N2825RAP 42, RAP 43Initial IssueStatus Indicator Repair Analysis ProceduresRAP 42 Toner Sensor AssemblyProcedureSwitch the printer power off. Remove the Left Side Cover (REP 1.1) and the Print Engine Con-troller PWB Cover (REP 8.5). Open the Top Cover and remove the Print Cartridge. Cheat theTop Cover Interlock. Disconnect P/J14 from the Print Engine Controller PWB. Measure the volt-age between P14 pin 1 on the Print Engine Controller PWB and frame ground. The voltage is+24.0VDC.Y NMeasure the voltage between P/J16 pin 9 on the Print Engine Controller PWB and frameground. The voltage is +24.0VDC.Y NReplace the LVPS (REP 8.6).Replace the Print Engine Controller PWB (REP 8.5).Measure the voltage between P14 pin 3 and frame ground. The voltage is +5.0VDC.Y NReplace the Print Engine Controller PWB (REP 8.5).Switch the printer power off. Reconnect P/J14. Switch the printer power on. Raise and lowerthe Print Cartridge approximately 2 inches (50.8mm) while measuring the voltage between P/J14 pin 3 and frame ground. The voltage is 5.0VDC when the cartridge is in place and0.0VDC when the cartridge is raised.Y NCheck the continuity between P/J14 and P/J141. There is continuity between all thepins tested.Y NRepair or replace the Toner Sensor Harness (PL 8.1).Replace the Toner Sensor Assembly (REP 7.3).Problem Solved.RAP 43 HVPS AssemblyProcedureOpen the Top Cover. Remove the Print Cartridge. Inspect all contacts on the Right Print Car-tridge Guide Assembly and the terminals on the Print Cartridge. The terminals are in goodcondition and contacting properly when the cartridge is installed.Y NReplace the Right Print Cartridge Guide Assembly (REP 7.2) or the Print Cartridge (PL8.1) as necessary.Inspect the Seal Guide on the rear end of the Right Print Cartridge Guide Assembly. The SealGuide is intact, free of contamination, deformation or damage.Y NReplace the Right Print Cartridge Guide Assembly (REP 7.2).Enter Diagnostics and select Component Test. Scroll to Charge Roll AC. Insert a cheater intothe Top Cover Interlock Switch. Press Enter [4]. Measure the voltage between the Right SideGuide Charge Terminal (connector nearest the front of the machine) and frame ground, pressEnter. The reading is 1150 VAC.Y NScroll to “Dev Bias AC”. Measure the voltage between the Right Side Guide DeveloperBias Terminal (connector nearest the back of the machine) and frame ground, pressEnter. The voltage reading is 620 VAC.Y NScroll to “BTR-”. Place the probe on the left end of the BTR shaft. Press Enter. Thevoltage reading is 915 VDC.Y NSwitch the printer power OFF. Remove the Lower Rear Cover (REP 1.7),Duplex Assembly (REP 9.1) if installed, and the HVPS Cover (REP 1.6). Switchthe machine power on. Check the voltage between P/J181 pin 10 and frameground. The voltage is +24 VDC.Y NSwitch the printer power off. Remove the Left Side Cover (REP 1.1) andthe Print Engine Controller PWB Cover (REP 8.5). Switch the printerpower on. Check the voltage between P/J18 pin 1 on the Print EngineController PWB and frame ground. The voltage is +24 VDC.Y NCheck the voltage between P/J16 pin 9 on the Print Engine ControllerPWB and frame ground. The voltage is +24 VDC.Y NReplace the LVPS (REP 8.6).Replace the Print Engine Controller PWB (REP 8.5).Check the wires for continuity between P/J181 and P/J18. Repair orreplace the harness as necessary.Replace the HVPS (REP 8.2).Replace the HVPS (REP 8.2).A B
