Oki Data CONFIDENTIAL45487001TH Rev.1 6-64 /6. Troubleshooting procedure6.5.2.(17) Humidity sensor error (Error 123)(17-1) Humidity sensor errorCheck item Check work Actions to be takenat NG(17-1-1) Check the system connectionConnectionbetween the PU/CU board and thecontrol panel boardCheck if the 10-conductor FFC is connectedto the OPE connector of the PU/CU boardproperly.Check if the 10-conductor FFC is connectedto the CN501 connector of the controlpanel board properly.Check the connectors for half-way connectionor angled connection.Re-connect thecable normally.FFC connecting thePU/CU board andthe control panelboardCheck for open-circuit with VOM.Visually check that the sheath for peeling.Replace theFFC with anormal FFC.FFC connecting thePU/CU board andthe environmentsensor boardCheck for open-circuit with VOM.Visually check that the sheath for peeling.Replace theFFC with anormal FFC.Check item Check work Actions to be takenat NG(17-1-2) Environment conditionSharp changeof environmentconditionIs the environment condition changed sharplyfrom a low temperature environment to a highenvironment condition within a short time?(Example is such a case that a printer ismoved from storage condition of a cold areain winter to an office environment.)Leave a printerfor around onehour in the newenvironmentto get usedto the newenvironment.After that, turnon the poweragain.Before turnon the power,touch the metalpanel of thecontroller paneland the metalplate inside aprinter to feeltemperatureincreaseinside a printerwith humanhands. Afterconfirmationthat the printertemperature hasincreased closeto the roomtemperature,turn on thepower again.
