COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-36B. Controlling the Cartridge MotorFigure 4-702The cartridge motor is a 2-phase stepping motor, and is controlled by the cartridgemotor driver (IC5001) on the high-voltage PCB 1 to drive the developing cylinder of thecolor toner cartridge and the developing cylinder.In response to a print sequence command from the D-CPU (IC202), the M-CPU(IC201) sends the cartridge motor control signals (SLVPHA, SLVPHA*, SLVPHB,SLVPHB*) to IC5005 on the high-voltage PCB through the expansion I/O (IC203).IC5005 uses these signals to supply the motor with drive signals (SLVPHA, SLVPHA*,SLVPHB, SLVPHB*) to rotate the developing cylinders of the color toner cartridges andthe black toner cartridges.The machine’s drive gear arrangement would cause the developing cylinder of thecolor toner cartridges and the developing cylinder of the black toner cartridge to rotate inopposite directions if the cartridge motor was rotated in a single direction. To avoid this,IC5005 rotates the motor clockwise when the color toner cartridge is used, while it rotatesthe motor counterclockwise when the black toner cartridge is used.J5003-1SL VPHA*DC controller PCB(IC5005)Cartridge motordriver517166+24UHSLVPHASLVPHA*SLVPHBSLVHPB*+24UH CartridgemotorM312811118High-voltage PCB 1-2-3-4-5SL VPHB*SLVPHASLVPHBA9B4B3A10(IC201)D-CPU(IC202)M-CPU(IC203)Expansion I/O7517166128111187Download free service manual at http://printer1.blogspot.com
