COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)B. Electrical CircuitryThe machine’s electrical mechanisms are controlled by the two CPUs (Reference) onthe DC controller PCB.Reference:The two CPUs on the DC controller PCB have the following functions:1. D-CPU (IC201)• System control for the printer unit.• Video interface control (communication with the printer board PS/PCL).2. M-CPU(IC202)• Drive control for various loads (motor, solenoid).• Control of the fixing heater.• Control of the duplexing unit (accessory).CHAPTER 2 BASIC OPERATION2-2SensorSwitchDensity detectionPCBDrum cartridgememoryLaser driverPCBScannermotorBD PCBAccessoriescontroller PCB1Duplexingdriver PCBDuplexingunit1Video interface PCBReader unit *PS/PCL board *DC controller PCBD-CPUIC201M-CPUIC202RAMIC205FanMotorSolenoidClutchFanMotorSolenoidDevelopingrotarymotorPCBHigh-voltage PCB 1 Developing biasprimary chargingFixing heaterHigh-voltage PCB 2Separation staticelimination bias PCB* Available as an accessory in some areas.ECO 2 PCBEEPROMPre-exposureLED relay PCB Pre-exposure LED assemblyFan2-cassettepedestal *7-bin sorter *1KPD *2KPD *Separation static eliminationSecondary pre-transfer chargingFigure 2-102Download free service manual at http://printer1.blogspot.com
