Canon L90 Series Service Manual

Also see for FaxPhone L90: Starter Guide Reference guide Basic operation guide Specifications

Chapter 66-16.1 Overview/Configuration6.1.1 Overview 0018-4912F-6-1T-6-1The machine's fixing system is an on-demand type, and its fixing assembly consists of the fixing film unit: the fixing film has a built-in fixing heater, thermistor,and thermal fuse.Its rollers are driven by the main motor (M1).When print paper carrying a toner image arrives in the fixing assembly, the machine uses the heat from the fixing heater and the pressure from the pressure rollerto permanently fuse the toner with the fibers of the print paper before it moves out of the fixing assembly.Once outside the fixing assembly, the print paper is delivered to the delivery tray by the work of the face-down delivery roller upon detection by the delivery sensor(PS803).6.2 Various Control Mechanisms6.2.1 Controlling the Temperature of the Fixing Unit6.2.1.1 Heater Temperature Control 0018-4914The heater temperature control mechanism consists in monitoring the surface temperature of the fixing heater and controlling the fixing heater drive signal so thatthe temperature of the fixing heater is identical to the target temperature.[1] Fixing film unit [PS803] Delivery sensor[2] Pressure roller [M1] Main motor[3] Face-down delivery rollerM1PS803[1][2][3]