3-48 Phaser 7400 Color Printer Options Service ManualUnsupported Duplex Unit ROMThe installed Duplex Unit does not contain the correct firmware.Applicable Status Code:Code U34: Unsupported Duplex Unit ROMInitial Actions:■ Reseat the Duplex Unit.■ Cycle the printer's power.■ If the problem persists follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack References■ Duplex Unit■ Engine Control Board■ Options Map 4 Duplex Unit Controller BoardTroubleshooting Procedure TableStep Actions and Questions Yes No1 Check the following for evidence of fault ordamage:■ Duplex ConnectorIs there any damage?Replace anydamaged parts.Go to Step 2.2 Check that the Duplex Unit is correctlyinstalled and fully seated.Go to Step 3. Reseat the DuplexUnit (page 5-122).3 Check the Duplex Unit version using theService Diagnostics General Status menu.Is the version current?Replace EngineControl Board (seeBook 1), if the errorpersists, replace theDUPLEX harness.Replace theDuplex Unit(page 5-122).
