COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-34VII. OTHER CONTROL MECHANISMSA. Developing Rotary Motor ControlFigure 4-701The developing rotary motor is a 2-phase stepping motor, controlled by the rotarymotor driver (IC701) on the developing rotary motor PCB, and is used to rotate the devel-oping rotary.In response to a print sequence command from the D-CPU (IC202), the M-CPU(IC201) sends the developing rotary motor control signals (DEVPHA, DEVPHA*,DEVPHB, DEVPHB*) to the rotary motor driver (IC701) on the developing rotary motorPCB.The rotary motor driver uses these signals to send drive signals (RMAO, RMAO*,RMBO, RMBO*) to the developing rotary motor, switching the motor between normal andlow-speed rotation modes.The motor torque would fluctuate according to the speed of the motor, requiring vari-ation of the current level.DC controller PCBJ704-1Developingrotarymotor-3-4-5-2-6M1Developing rotary motor PCB24VARRMAORMAO*RMBORMBO*Rotary motor driver811118M-CPU(IC202)D-CPU(IC201)(IC701)J220-A9+5V+5V+5V+5V166517J706-A1-A2-B8-B9-A8-B2-B1DEVPHADEVPHA*DEVPHBDEVPHB*Q242Q245Q244Q243Q247Q246214445DEVOFFDownload free service manual at http://printer1.blogspot.com
