COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)The PWM IC (IC208) generates PWM modulation signals (VDATA*; PWM video sig-nals); then, it sends two sets of laser drive signals (DATA*, BDATA) through the LVDS IC(IC209) to the laser driver PCB. The receiver (IC1001) on the laser driver PBC demodu-lates these two sets of signals to generate laser drive signals (DATA*) for the laser driveIC (IC1002).When the APC sampling timing signal (SAMPLE*) is ‘1’ and the image enable signal(LENB*) is ‘0’, the laser drive IC turns on the laser diode in response to the laser drivesignal (DATA*).*1 Reader controller PCB (when making prints with the reader unit installed).CHAPTER 3 LASER EXPOSURE SYSTEM3-4Download free service manual at http://printer1.blogspot.com
