02/20002-24 DocuPrint N2025/N2825RAP 19, RAP 20Initial IssueStatus Indicator Repair Analysis ProceduresRAP 19 U6: NVM Fail / Power Off Then OnThere is problem with Non-Volatile RAM on the Printer Engine Controller PWB.ProcedureSwitch the main power off then on. The U6 Error Code appears.Y NTo ensure that the problem is solved, switch the Main Power off and on couple of times.The U6 Error Code reappears.Y NProblem Solved.Enter Diagnostics and select NVM Config (password 0734). It is possible to enter intothe NVM Menu.Y NReplace the Print Engine Controller PWB (REP 8.5).Check the NVM Data one by one referring to the Table of “Nonvolatile Memory Configura-tion Codes”. The data is set properly.Y NThe incorrect data is read only.Y NSet the data to the default value.Replace the Print Engine Controller PWB (REP 8.5).Go to RAP 44.Enter Diagnostics and select NVM Config (password 0734). It is possible to enter into theNVM Menu.Y NReplace the Print Engine Controller PWB (REP 8.5).Check the NVM Data one by one (Refer to NVM Menu under IDT Diagnostics). The data isset properly.Y NThe incorrect data is read only.Y NSet the data to the default value.Replace the Print Engine Controller PWB (REP 8.5).Go to RAP 44.RAP 20 Fan AbnormalThe printer is detecting incorrect fan rotation.ProcedureBoth Fans rotate when the main power is Switched ON.Y NBoth of the fans are stopped.Y NReplace the fan that is not running (REP 8.4/ REP 8.7).Switch OFF the main power. Remove the Lower Rear Cover (REP 1.7). Switch the mainpower ON. Check for 24VDC between P/J161-13 and frame ground, and 0.6VDCbetween P/J165-12 and frame ground. Both voltages are correct.Y NReplace the Print Engine Controller PWB (REP 8.5).Replace the LVPS (REP 8.6).Enter Diagnostics. Enter Component Test and scroll to “High Speed Fan” to test the Fan FastSignal. The Fans rotate at high speed.Y NSwitch the printer power OFF. Remove the Lower Rear Cover (REP 1.7). Switch theprinter power ON. Enter Diagnostics. Enter Component Test and scroll to “High SpeedFan”. Check for 24VDC between P/J161-13 and frame ground, and 0.6VDC between P/J165-12 and frame ground. Both voltages are correct.Y NReplace the Print Engine Controller PWB (REP 8.5).Replace the LVPS (REP 8.6).Replace the Print Engine Controller PWB (REP 8.5).
