02/20002-39DocuPrint N2125 RAP 43 , RAP 44Status Indicator Repair Analysis ProceduresInitial IssueRAP 43 HVPS AssemblyProcedureOpen the Front Cover. Remove the Print Cartridge. Inspect all contacts on the Transport ChuteAssembly and the terminals on the Print Cartridge. The terminals are in good condition andcontacting properly when the cartridge is installed.Y NReplace the Transport Chute Assembly (REP 6.1) or the Print Cartridge (PL 8.1) as nec-essary.Cheat the Front Cover Interlock Switch. Enter Diagnostics and select Component Test. Scroll toeach of the high voltage tests (Table 1). Measure the voltage between the contact listed andframe ground. Press the Enter Key.At least one of the voltages is correct.Y NSwitch the printer power off. Remove the Left Interface Cover (REP 1.1), Left Cover (REP1.2), and the Left Plate Assembly (REP 1.11). Switch the printer power on. On the PrintEngine Controller PWB, check the voltage between P/J26 pin 2 and frame ground. Thevoltage is +24VDC.Y NReplace the Print Engine Controller PWB (REP 9.3).Replace the HVPS (REP 9.6).All the voltages are correct.Y NReplace the Print Engine Controller PWB (REP 9.3). Cheat the Front Cover InterlockSwitch. Enter Diagnostics and select Component Test. Scroll to each of the high voltagetests (Table 1). Measure the voltage between the contact listed and frame ground. Pressthe Enter Key. All the voltages are correct.Y NCheck the Transport Chute Assembly for proper installation. Check the HVPS har-ness for proper connection and for damage. If everything is OK, Replace the HVPS(REP 9.6)Problem Solved.Problem solved.RAP 44 Electrical NoiseProcedureCheck if there is other electrical equipment, such as electrical generators, radio transmitters, ordevices using electrical motors, within ten feet of the printer. Shut off the other electrical equip-ment, or relocate the printer at least twenty feet away from other devices. The ElectricalNoise problem is still present.Y NProblem solved.Check the AC wall outlet and power cord (see RAP 1). The AC wall outlet is correctly wiredand grounded.Y NInform the customer of insufficient voltage or improper wiring. A licensed electrician mustcorrect the wiring.Open the Front Cover. Remove the Print Cartridge. Inspect all contacts on the Transport ChuteAssembly and the terminals on the Print Cartridge. The terminals are in good condition andcontacting properly when the cartridge is installed.Y NReplace the Transport Chute Assembly (REP 6.1) or the Print Cartridge (PL 8.1) as nec-essary.Remove the Left Interface Cover (REP 1.1). Inspect the grounding screw and wire connectedto the Main Power Connector. The cable is grounded properly.Y NAttach the grounding screw properly.Replace the Print Cartridge (PL 8.1). The Electrical Noise problem is still present.Y NProblem solved.Remove the Fuser Assembly (REP 6.2). Remove the end covers (see REP 6.9). Inspect thecables of the Heater Rod. The cables are attached properly.Y NAttach the cables properly or replace the Fuser Assembly (REP 6.2).Disconnect the HVPS (P/J26) from the Print Engine Controller PWB. Run 20 Test Prints (theprints will be blank). The Test Prints run normally.Y NReplace the Print Engine Controller PWB (REP 9.3). The problem is still present.Y NProblem solved.Inspect all of the grounds in the printer. All the grounds are securely connected.Y NRepair the bad grounds.Replace the following components one at a time until the cause of the problem is found.• HVPS PWB Assembly (REP 9.6).• Print Engine Controller PWB (REP 9.3).Table 1 High Voltage Power Supply ReadingsHigh Voltage Test Contact ReadingCharge Roll DC Rear Transport Chute Pin Contact -425 ±40 VDCCharge Roll AC Rear Transport Chute Pin Contact 1000 ± 100 VACDev Bias DC Front Transport Chute Pin Contact +7.3 ± 3 VDCDev Bias AC Front Transport Chute Pin Contact 555 ± 55 VACBTR - BTR Roll Bushing -81 ± 8 VDCBTR + BTR Roll Bushing 0 VDCDetack Saw Detack Saw -930 ± 100 VDCA
