COPYRIGHT © 2000 CANON INC. 2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000CHAPTER 4 IMAGE FORMATION SYSTEM4-41 P4.4 Detecting the Level of Toner and Controlling the Supply ofTonerThe following component parts are associated with the toner supply system:F04-404-01The following signals are used:[1] developing assembly toner level detection signal; when the absence of toner is detected,‘0’.[2] hopper toner level detection signal; when the absence of toner is detected, ‘0’.TS2TS1DC controller PCB1789 · · ·J103ATEP [2]0VDTEP [1]5V5V0V191011 · · ·J103BDownload Free Service Manual at http://printer1.blogspot.com