DC ControllerThe DC Controller monitors temperature of the Thermistor at all time. When abnormal temperature is detected, the DCController stops the output of Fixing Heater control signal, and turns OFF relays (RL101) to shut off the power supply to theFixing Heater.Fixing Heater safety circuitFixing Heater safety circuit monitors temperature of the Thermistor at all time. When abnormal temperature is detected, theFixing Heater turns OFF relays (RL101) to shut off the power supply to the Fixing Heater.ThermoswitchWhen the temperature of the Fixing Heater rises abnormally high, the Thermoswitch opens to shut off the power supply to theFixing Heater.Down Sequence ControlWhen the temperature of the Fixing Heater exceeded the threshold value, the machine delivers paper being printed, drives thefan and repeats the stopped state (approx. 30 seconds) and 50% reduced productivity state to decrease the temperature.*1: Number of sheets corresponding to 50% productivity with LTR (approx. 18 sheets, 1-suded) are fed.Fixing Unit Failure DetectionOverviewThe DC Controller shuts down the power supply to the Fixing Unit and notifies an error when the Fixing Unit is in the followingcondition.• Startup failure• Abnormal high temperature failure• Abnormal low temperature failure• Fixing drive circuit errorDescriptionFixing Unit startup failureAn error code is notified if the Fixing Unit does not reach a certain temperature within a specified period of time.Abnormal high temperature failureAn error code is notified if an abnormally high temperature is detected in the Fixing Unit.Abnormal low temperature failureAn error code is notified if an abnormally low temperature is detected in the Fixing Unit.Fixing Unit drive circuit errorAn error code is notified if an abnormality is detected in the Fixing Unit drive circuit.Error CodeE000: Startup failure• E000-0000: Fixing Unit startup failureE001: Abnormal high temperature failure• E001-0000: Abnormal high temperature of Fixing UnitE003: Abnormal low temperature failure• E003-0000: Abnormal low temperature of Fixing UnitE004: Fixing drive circuit error• E004-0000: Fixing Heater drive circuit error2. Technology49
