E. Photosensitive Drumnn Points to Note When Handling the Photosensitive DrumThe machine uses an amorphous silicon drum, which will be subject to deteriorationif not oriented correctly (applicable to the process unit also). Keep the following in mindwhenever you need to handle the photosensitive drum:q If you have removed the process unit from the copier or removed the photosensitivedrum from the process unit, be sure to protect the photosensitive drum from light bywrapping it with the photosensitive drum protection sheet or six or more sheets of A3(11"×17") or larger copy paper.w Do not place the process unit or the photosensitive drum near a window or in an areaexposed to direct rays of the sun.e Do not work in an area where the temperature/humidity changes abruptly or subjectto a high/low temperature/humidity.r Do not work in an area subject to dust, ammonium gas, or organic gas.The foregoing points apply equally to all types of photosensitive drums.1. Removing the Drum Unit1) Open the front door, and slide out the hopper assembly.2) Remove the process unit. (See p. 7-18.)3) Remove the primary charging assembly and the pre-transfer charging assembly.4) Remove the blanking exposure lamp assembly.5) Remove the blanking exposure assembly rail stay.6) Remove the three mounting screws q, and remove the gear plate w.Figure 4-311qqwCOPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-45
