3–2OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)B. Outline of Electrical Cir-cuitryThe machine’s most electrical mechanisms arecontrolled by the microprocessor on its DC controllerPCB. The microprocessor reads the input signalsfrom the sensors and operation keys according toits pre-programmed instructions and sends signalsto drive such loads as motors, solenoids, and lampsas necessary.The machine’s microprocessor is capable ofreading analog signals as well as digital signalsusing its A/D converter.Figure 3-102SensorAE sensor PCBMain thermistorSub thermistorControl panelControl card (accessory)SensorDC controller PCBCassette driver PCB/Paper deck driver PCB(accessory)Composite power supplyHigh-voltagecircuitMain motordriver PCBRDF (accessory)Sorter (accessory)Scanning lampToner leveldetectionBias PCBHeater driver PCBDeveloping cylinderTransfer chargingStatic eliminatorPrimary chargingMain motorPre-exposure lampMotor Scanner motorLens motorDuplexing motorFan Heat exhaust fan, Feeding fan,Scanner cooling fanChange solenoidMultifeeder holding plate solenoidBlanking shutter solenoidPrimary charging roller cleaning solenoidTransfer charging roller release solenoidDuplexing change solenoidRegistration clutchDuplexing registration clutchPick-up clutch 1, 2Multifeeder pick-up clutchMotor Cassette unit motorPaper deck motorCassette pick-up clutchDeck pick-up clutchCLCLSLLAM1HVFixing rollerheaterCPUQ301CPUQ307ROMQ308RAMQ311IPC+5V+24V+34V
