RJ-901C/RJ-900C Maintenance Manual 9 Troubleshooting9-339.3 Troubleshooting Without Error MessagesThis section describes the symptoms of errors without an error message as well as the check items andrecovery actions.9.3.1 Initial Operation ProblemsTable 9-9 Symptoms, Check Items and Actions for Initial Operation ProblemsNo. Symptom Check item Action Reference1 Machine powercannot be turned ON1. Is operation panelunit assembly cablebroken or shorted?Replace panel cable. "4.2.2RemovingOperationPanel Unit"p.4-82. Panel unit assemblymay be damaged.Replace panel unitassembly."4.2.2RemovingOperationPanel Unit"p.4-83. Inlet assembly maybe defective.Replace inlet assembly. "4.3.5ReplacingInletAssembly"p.4-244. Power boardassembly may bedefective.Replace power boardassembly."4.3.4ReplacingPower BoardAssembly"p.4-222 Abnormal LCDoperation (nodisplays/garbledcharacters)1. Check power supplyvoltage (AC100V).Replace power boardassembly."4.3.4ReplacingPower BoardAssembly"p.4-222. Check power supplyvoltage (DC5V).Replace power boardassembly."4.3.4ReplacingPower BoardAssembly"p.4-223. Check power supplyvoltage (DC24V,DC42V).Replace power boardassembly."4.3.4ReplacingPower BoardAssembly"p.4-22
