E. Photosensitive Drumnn Photosensitive DrumThe copier’s photosensitive drum is a high-sensitivity amorphous silicon drum,whose sensitivity may lower if the drum or the process unit is not positioned correctly.Keep the following in mind whenever handling the photosensitive drum:q If you have removed the process unit from the copier or the photosensitive drum fromthe process unit, keep the photosensitive drum out of light.To do so, use the photosensitive drum protection sheet, or wrap six or more sheetsof A3 or larger copy paper.w Do not place the process unit or the photosensitive drum near a window or areassubject to direct rays of the sun.e Avoid areas subject to high temperature/ humidity, low temperature/humidity or rapidchanges in temperature and humidity.r Avoid areas subject to dust, ammonium gas, or organic solvent gas.The above points apply equally to the photosensitive drums of other models.1. Removing the Drum Unit1) Open the front door, and slide out the hopper assembly.2) Take out the process unit. (See p. 7-17.)3) Take out the primary charging assembly and the pre-transfer charging assembly.4) Remove the blank exposure lamp assembly.5) Remove the blank exposure assembly rail stay.6) Remove the three mounting screws q, and remove the gear plate w.Figure 4-311qqwCOPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-42
