Canon MF4500 Series Service Manual

Canon MF4500 Series Service Manual Manual pdf 47 page image

22 2-222-22Technical Overview > Fixing System > Overview/Configuration > Main Parts of Fixing assemblyTechnical Overview > Fixing System > Overview/Configuration > Main Parts of Fixing assemblyFixing SystemOverview/Configuration■ OverviewFixing/delivery system consists of the fixing film unit, pressure roller and delivery roller etc.These rollers are driven by the main motor (M1).The paper that toner is transferred to are heated by the fixing heater of the fixing film unit andpressured by the pressure roller.The paper that toner is fused on is delivered from the fixing assembly, detected by the fixingdelivery sensor (PS701) and the paper width sensor (PS702), and then delivered to thedelivery tray by the delivery roller.M1SL2PS701PS702[1][2][3][1] Delivery Roller[2] Fixing Film Unit[3] Fixing Pressure RollerPS701 Fixing delivery sensorPS702 Paper width sensorM1 Main motorF-2-29■ Main Parts of Fixing assemblyEngine controllerFIXING HEATERDRIVE signalFixingheaterdrive circuitFixingheatersafety circuitFIXING TEMPERATUREsignalFixing filmPressure rollerTP1TH1H1 Fixing control CPUH1 : Fixing heater For heating the fixing film (ceramic heater) 1 pcTH1 : Main thermistor For controlling the fixing heater temperature (contact typethermistor)1 pcTP1 : Temperature fuse For detecting the fixing heater overheat (non-contact type fuse)When the heater overheats, the fuse melts to cut the powersupply to the heater.1 pcF-2-30T-2-5