COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)E. Controlling the Main MotorFigure 2-117The main motor is a 3-phase 8-pole DC brushless motor. The main motor is controlledby an M-CPU (IC202) by way of an extension I/O, and it serves to drive the pickup-, feed-ing-, fixing-, and delivery-related rollers and the secondary transfer belt/ITD cleaningroller cams.When the print sequence command*1 is received from the D-CPU (IC201), the M-CPU (IC202) causes the main motor drive signal (MON*) to go ‘0’ by way of the exten-sion I/O (IC203) to rotate the main motor.The main motor causes the main motor ready signal (MRDY*) to go ‘0’ when it reach-es a specific speed.The motor is switched to either of three speeds in response to combinations of mainmotor speed switch signals (MSPED1, MSPED2); i.e., normal, 1/4 speed (transparencymode), and 1/3 speed (thick paper mode).CHAPTER 2 BASIC OPERATION2-19J219-6-3-1-2-4-5D-CPU(IC201)M-CPU(IC202)DC controller PCB+5V+24UH(IC203)Main motorJ1-1-4-6-5-3-2M424UHMRDY*MSPED1MSPED2MON*GNDExtension I/ODownload free service manual at http://printer1.blogspot.com
