Canon L100 Service Manual

Also see for FAXPHONE L100: Basic operation guide Starter Guide Technical information

Contents

Canon L100 Service Manual Manual pdf 29 page image

22 2-62-6Technical Overview > Controller System > Power Supply > Protective FunctionsTechnical Overview > Controller System > Power Supply > Protective FunctionsPower Supply■ Power Supply5.5V3.3V24V3.3V5.5V5.5V3.3VMain Controller PCBCIS UnitControl Panel Unit5.5V3.3V1.0V24VDC/DCConverter24V3.3VEngine Controller PCB5VGeneratingCircuitProtectionCircuitMotor Driver PCBLaser Scanner UnitFixing AssemblyPickupSolenoid(SL1)24VPowerSupplyAssembly24VMain Motor(M1)24VDF Motor(M3)3.3VSW1100FU101 FU201FU202 FU203F-2-5■ Protective Functions● Power protective functionLow voltage power circuit carries the overcurrent preventive function against and overvoltagepreventive function that block the voltage output automatically to prevent the power circuitbrokerage when the overcurrent or overvoltage occur due to load errors such as short circuitetc.Thus, when the DC power cannot be output from the low voltage circuit, the protectivefunction against overcurrent or overvoltage may be working. Turn OFF the Power Switch(SW1100) to fix load errors and turn ON the Power Switch (SW1100) again (see CAUTION).Also the circuit carries the 4 fuses (FU101, FU201, FU202, FU203) as another preventivefunction. The fuses blow to block the power supply when overcurrent occurs in AC line.CAUTION:When restoring the low voltage power after protective function is activated, leave it for2 minutes or more from turning off the Power Switch (SW1100) or plugging out beforeturning ON.● Safety functionThe host machine equips the function of stopping 24V in part of the high voltage power unit toavoid users and engineers from getting burned or electric shock.When the cartridge door is opened, the Door Switch (SW501) is turned off and 24V suppliedto the high voltage power unit is shut.Engine controller CPU determines the door open when the Door Switch (SW501) is turnedOFF.