Canon iR3245, Service Manual

Page: 217 / 746

Chapter 7
7-17
7.11 Photosensitive Drum Cleaning
7.11.1 Outline
0018-9728
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The photosensitive drum cleaning mechanism uses the photosensitive drum cleaning blade to scrape off the residual toner left behind from transfer; the toner thus
collected is moved to the waste toner box.
7.11.2 Collection of Waste Toner
0018-9729
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The waste toner scraped off by the cleaning blade is moved by the waste toner feedscrew to the waste toner box found at the front of the machine. The waste toner
feedscrew is operated by the drive from the drum flange.
7.11.3 Checking the Waste Toner Box
0018-9730
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
To prevent leakage of waste toner from the waste toner box or to prevent overloading the waste toner feedscrew, the machine is equipped with a waste toner detec-
tion mechanism. The waste toner box can hold about 2043 cc of toner, and the machine identifies the waste toner box as being full when there is about 1766 cc of
toner or when the toner comes to weigh about 1050 g.
When the weight of waste toner increases, the waste toner case itself lowers on its own, thus causing the machine to assume that the case has become full.
F-7-17
Detection of E019-0000
When the machine identifies the waste toner full sensor as being continuously on for 2000 sheets, it will indicate a warning; if it then detects the activation of the
sensor for 100 sheets continuously, it will indicate 'E190-000'. (The count is increased coinciding with delivery.)