1-4-23(12)No transfer biasis output.Poor contact of transferbias terminal and transferbias terminal (J1, J2, J3) onthe engine/high voltagePWB.(See P.1-5-14).Defective engine/high volt-age PWB.(13)The messagerequesting paper tobe loaded is shownwhen paper ispresent in the papercassette.Defective paper sensor onthe engine/high voltagePWB.Replace the engine/high voltage PWB (See P.1-5-14).(14)A paper jam inthe paper feeding/conveying section orfuser section is indi-cated when thepower switch isturned on.A piece of paper torn frompaper is caught around reg-istration sensor or exit sen-sor.Check and remove if any.Defective registration sen-sor on the engine/high volt-age PWB.Replace the engine/high voltage PWB (See P.1-5-14).Defective exit sensor on thepower source PWB.Replace the power source PWB (See P.1-5-14).(15)The indicatorrequesting cover tobe closed is dis-played when the topcover is closed.Defective interlock switchon the engine/high voltagePWB.Check for continuity across the interlock switch. If there is no con-tinuity when the interlock switch is on, replace the engine/highvoltage PWB (See P.1-5-14).Problem Causes Check procedures/corrective measuresY107330-8 Service Manual