02/20002-30 DocuPrint N2125RAP 28Initial IssueStatus Indicator Repair Analysis ProceduresRAP 28 Power SupplyProcedureSwitch the printer power off. Disconnect the power cord. Remove the Left Interface Cover (REP1.1), Left Cover (REP 1.2), and the Left Plate Assembly (REP 1.11). Disconnect the followingfrom the LVPS:• P/J281 (Print Engine Controller PWB) (REP 9.3)• P/J282 (System Controller PWB)(REP 9.2)• P/J11(Fuser)(REP 6.2)• P/J283 (Main Fan)(REP 9.1)• P/J284(Front Interlock Switch)(REP 9.9)• P/JPN1 (5VDC Power Supply)(REP 9.4)Connect the power cord. Switch the printer power on and measure the voltages listed in Table1 on the LVPS.All voltages are correct.Y NReplace the LVPS (REP 9.5).Switch the printer power off. Reconnect P/J281 to the LVPS. Switch the printer power on andmeasure the voltages listed in Table 1. All the voltages are correct.Y NSwitch the printer power off. Reconnect all the P/Js to the LVPS. Disconnect the followingfrom the Print Engine Controller PWB:• P/J35 (OCT PWB) (REP 10.7)• P/J34 (Duplex PWB) (REP 12.4)• P/J33 (Size 1 PWB) (REP 3.13)• P/J22 (Laser) (REP 7.4)• P/J21 (Laser) (REP 7.4)• P/J23 (Connector PWB) (REP 9.7)• P/J31 (Stack Full Sensor) (REP 6.6)• P/J30 (Rear Interlock Switch) (REP 9.10)• P/J25 (Print Cartridge Sensor) (REP 7.3)• P/J32 (Exit Motor) (REP 6.5)• P/J29 (Main Motor) (REP 8.1)• P/J26 (HVPS PWB) (REP 9.6)• P/J27 (Fuser Sensors) (REP 6.2)Switch the printer power on and measure the voltages listed in Table 1. All voltages arecorrect.Y NReplace the Print Engine Controller PWB (REP 9.3).Switch the printer power off. Reconnect one of the disconnected plugs. Switch the printerpower on. Measure the voltages listed in Table 1. All the voltages are correct.Y NReplace the component just connected to the Print Engine Controller PWB.Repeat the step with the next disconnected plug.Switch the printer power off. Reconnect one of the disconnected plugs. Switch the printerpower on. Measure the voltages listed in Table 1. All the voltages are correct.Y NReplace the component just connected to the LVPS.Repeat the step with the next disconnected plug.Table 1 LVPSRed Lead Black Lead VoltageP/J281 pin 7 Frame Ground +5.0VDCP/J281 pin 10 Frame Ground +3.3VDCP/J281 pin 1 Frame Ground +24.0VDCAA
