02/20002-14 DocuPrint N2125RAP 4Initial IssueStatus Indicator Repair Analysis ProceduresRAP 4 Tray # Failure Power Off/On (C3)Tray Assembly (Tray 1, Tray 2, or Tray 3) are not in place.ProcedureEnter Diagnostics, run a test print from every tray (see section 6). The Error Code specifiesTray 2 or Tray 3.Y NRemove and reinstall Tray 1. Press key “0”. The C3 error code still appears.Y NProblem solved.Measure the voltage from the lower contact of the Paper Feeder Socket (P/J672) andframe ground. The voltage is +24VDC.Y NMeasure the voltage from P/J33 pin 6 on the Print Engine Controller PWB and frameground. The voltage is +24VDC.Y NGo to RAP 2.Switch off the printer power. Remove the Size Sensor Housing (REP 3.11). Measurecontinuity between the disconnected P/J33 pin 6 to P/J331 pin 12 on the Tray 1 SizePWB. There is continuity between the two pins.Y NRepair or replace Feeder Harness Assembly (PL 9.1).On the Tray 1 Size PWB, measure continuity between P/J331 pin 12 to P/J61 pin 1.There is continuity between the two pins.Y NReplace the Tray 1 Size PWB (REP 3.13).Check the wiring between P/J67 pin 5 on the Tray 1 Feeder PWB and the bottom pinon the Paper Feeder Socket (P/J672). If in good condition, replace the Tray 1 FeederPWB (REP 3.9).On the paper tray, measure the resistance between the middle and bottom terminals onthe Paper Feeder Socket. The resistance is 75 to 105 ohms.Y NGo to RAP 37On the paper tray, measure the resistance between the top and bottom terminals on thePaper Feeder Socket. There is continuity (0 ohms) between the two pins.Y NRepair or replace the Paper Feeder Socket.Replace the following parts one at a time until the problem is resolved:• Stack Height Sensor (3.4)• Feeder PWB (3.9)• Size 1 PWB (3.13)• Print Engine Controller PWB (9.3)Remove and reinstall the Tray indicated. Press key “0”. The C3 error code still appears.Y NProblem solved.Exchange Tray 1 with the Tray generating the “C3” code. Run a test print from each tray. Theerror code now indicates a Tray 1 failure.Y NThe error code indicates a Tray 2 failure.Y NRemove the Tray 3 from the paper feeder. Check the voltage between the lower ter-minal on the Paper Feeder Connector and frame ground. The voltage is +24VDCY NCheck the wiring harnesses between the Tray 2 Size PWB (P/J53) and the Tray3 Size PWB (P/J54). Repair or replace if necessary. If the harnesses are ingood condition, replace the Tray 3 Size PWB (REP 11.19) then the Tray 3Feeder PWB (REP 11.9).Replace the following components, in order, until the problem is resolved:• Stack Height Sensor (REP 11.13)• Feeder PWB (REP 11.9)• Size PWB (REP 11.19)• Print Engine Controller PWB (REP 9.3).Remove the Tray 2 from the paper feeder. Check the voltage between the lower terminalon the Paper Feeder Connector and frame ground. The voltage is +24VDCY NCheck the wiring harnesses between the Tray 1 Size PWB (P/J51) and the Tray 2Size PWB (P/J52). Repair or replace if necessary. If the harnesses are in good con-dition, replace the Tray 2 Size PWB (REP 11.19) then the Tray 2 Feeder PWB (REP11.9).Replace the following components, in order, until the problem is resolved:• Stack Height Sensor (REP 11.13)• Feeder PWB (REP 11.9)• Size PWB (REP 11.19)• Print Engine Controller PWB (REP 9.3).Remove the Tray now occupying the Tray 1 position and continue with RAP 37.AA
