Troubleshooting for a C440 error in e
Contents
1. Troubleshooting for a C440 error in e STUDIO205L 255 305 355 455 When a C440 error occurs in e STUDIO205L 255 305 355 455 carry out a check using the following procedures Be sure to unplug the power cable before starting the operation lt Checking the lamp harness connection in the fuser unit gt 1 Take off the fuser unit from the equipment and divide it into the heat roller unit and pressure roller unit Refer to 12 6 1 and 12 6 2 in the Service Manual 2 Check the white lamp harness connection in the drawer connector on the heat roller unit side referring to the pictures below Lamp harness P 1 31 8B 6LH61438000 HRNS ACIN2 471 e STUDIO205L 255 305 P 1 31 8A 6LH61439000 HRNS ACIN2 473 e STUDIO355 455 release lever Mfes Pressure roller unit Sj Pressure release lever Rekase Bap Not acceptable Note The harnesses for e STUDIO355 455 are shown in the above pictures For e STUDIO205L 255 305 there is no blue one 1 3 3 Replace the harnesses if the connection is not corrected Before replacing them remove the separation fingers center thermostat center side edge thermistor heater lamp and heat roller Refer to 12 6 3 to 12 6 7 in the Service Manual lt Checking the shape of the edge thermistor gt 1 Take off the fuser unit from the equipment and then remove the edge thermistor following the procedure in the Service Manual 2 Check if the edge thermistor is deformed as shown in the pictur2. e below Acceptable Not acceptable 3 Replace the edge thermistor if its shape is deformed Refer to 12 6 6 in the Service Manual Thermistor P 1 31 31 6LE63998000 THMS HTR 280 2 3 4 When the edge thermistor is installed in the fuser unit be careful not to insert it into the clearance indicated by the red arrow below lt Checking the center side thermistor for dust gt 1 Take off the fuser unit from the equipment and remove the center side thermistor following the procedure of the Service Manual 2 Check if there is any toner or paper dust on the thermistors 3 If there is any perform cleaning following the method of 5 7 6 in the Service Handbook 3 3
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