COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)B. Locking the Secondary Transfer BeltThe secondary transfer belt assembly is locked to the intermediate transfer drum onwhich paper is placed before starting secondary transfer.Normally, the secondary transfer belt assembly is away from the intermediate trans-fer drum, and is locked to the holding transfer drum as needed.The DC controller PCB causes the secondary transfer belt clutch drive signal (STGR-CLD8) to go ‘0’ as soon as paper reaches the secondary transfer belt assembly, turningon the secondary transfer belt clutch (CL4), driving the secondary transfer belt cam, andpushing up the secondary transfer belt assembly.As a result, print paper is forced against the intermediate transfer drum, and the toneris transferred for the intermediate transfer drum to the print paper.When paper moves away and secondary transfer ends, the DC controller CPB turnsoff the secondary transfer belt clutch (CL4) to move the secondary transfer belt awayfrom the intermediate transfer drum.Figure 4-402CHAPTER 4 IMAGE FORMATION SYSTEM4-19CL4Intermediate transfer drumDC controller PCBSecondary belt clutchSecondary transfer belt camSTRCLD*Secondary transferbelt assemblyPaperDownload free service manual at http://printer1.blogspot.com
