Oki Data CONFIDENTIAL45487001TH Rev.1 6-59 /6. Troubleshooting procedureCheck item Check work Actions to be takenat NG(10-2-3) AC power input for the fuseAC power voltagefrom the lowvoltage powersupplyCheck if the AC voltage for heater is normallysupplied or not.Power supply CN03 connector , betweenpin-1 and pin-4, and between pin-2 and pin-3.Replace the lowvoltage powersupply.Heater ON signalthat is outputfrom PU to thelow voltage powersupplyCheck that the heater ON signal goes activeat the warming up timing, or not."L" active while ON.Power connector of the PU/CU board,between pin-24 and pin-26.Replace thePU/CU board.6.5.2.(11) Motor fan error (Errors 122, 127, 128, 918)(11-1) The low voltage power supply fan does not rotate immediately after the power isturned on.Check item Check work Actions to be takenat NG(11-1-1) Cable connection condition and wiring conditionCable connectioncondition andwiring conditionof the low voltagepower supply fanand those of thefuser fanCheck if the connectors are connectednormally or not.Check if extra length of the cables does nottouch the fan blade or not.Correct theconnectioncondition ofthe connectors.Correct thecable wiringroute. Replacethe fan.(11-2) Rear fan does not rotate during the Duplex printing.Check item Check work Actions to be takenat NG(11-1-2) Cable connection condition and wiring conditionCable connectioncondition andwiring condition ofthe Duplex fanCheck if the connectors are connectednormally or not.Check if extra length of the cables does nottouch the fan blade or not.Correct theconnectioncondition ofthe connectors.Correct thecable wiringroute. Replacethe fan.24V power suppliedto the fanCheck if the fuse F1 of the PU/CU board hasblown out or not.Replace thePU/CU board.
