CHAPTER 12 MAINTENANCE AND INSPECTIONCOPYRIGHT © 2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002 12-11 Periodically Replaced PartsSome parts of the machine require periodical replacement to ensure a specific level of ma-chine performance (i.e., once they fail, the machine performance will be affected signifi-cantly).If possible, plan the replacement to coincide with a scheduled service visit.The data given is for reference only, and is subject to the site environmentand characteristics of use.1.1 CopierThe copier does not have parts that require periodical replacement.1.2 Cassette UnitThe cassette unit does not have parts that require periodical replacement.1.3 Inner 2-Way TrayThe inner 2-way tray does not have parts that require periodical replacement.