02/20002-29DocuPrint N2125 RAP 26 , RAP 27Status Indicator Repair Analysis ProceduresInitial IssueRAP 26 Inoperative KeypadControl Panel is not operative.ProcedureEnter Diagnostics and select the Component Test. Scroll to Sensor Input test and press Enter[4]. The printer enters the Diagnostic Mode to the Sensor Input Level.Y NDisconnect P/J18 on the System Controller PWB. Measure the voltages listed in Table 1between P18 on the System Controller PWB and frame ground.All the voltages are correct.Y NReplace the System Controller PWB (REP 9.2).Disconnect P/J412 from the Control Panel. Measure continuity on all wires between P/J412 and P/J18. All checks are good.Y NReplace the wiring harness (PL 1.1).Replace the Control Panel Assembly (PL 1.1).Keypad numbers (1-7) increment the counter. Keypad number [4] enters the test and (0)exits the test.Y NReplace the Control Panel Assembly (PL 1.1).Replace the System Controller PWB (REP 9.2).RAP 27 Erratic Printer OperationProcedureDisconnect all host cables. Enter diagnostics and select Test Print. Run 15 to 20 test prints.The printer generates test prints.Y NSwitch the printer power off. Disconnect P/J PN1 from the LVPS Assembly. Switch theprinter power on. Check the voltage between P/J281 pin 7 and frame ground. The volt-age is +5.0VDC.Y NSwitch the printer power off and reconnect PN1. Go to RAP 28.Replace the Print Engine Controller PWB (REP 9.3). The problem still appears.Y NProblem solved.Go to RAP 44.The printer RESETS while generating test print.Y NReplace the Print Engine Controller PWB (REP 9.3). The problem still appears.Y NProblem solvedNotify customer the cause of the trouble seems to be a communication problem betweenthe host computer and the printer. The customer should contact Customer Support.Go to RAP 28.Table 1 KeypadPin Voltage1 3.3 VDC2 0 VDC3 1.4 VDC4 0 VDC5 3.3 VDC6 1.4 VDC7 3.3 VDC8 0 VDCmanuals4you.commanuals4you.com
