COPYRIGHT © 2000 CANON INC. 2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000CHAPTER 4 IMAGE FORMATION SYSTEM4-48 PThe drum heater is controlled to 43°C by the drum heater control PCB.When wear of the drum or parts associated with charging assemblies advances, halftoneimages can become distorted if printed in a high temperature/humidity environment (muchmoisture in the air).To prevent distortion, SW2001-1 on the drum heater control PCB may be turned on tochange from 43°C to 47°C (default: OFF, control at 43°C).If the switch is turned on (controlled to 47°C) in a low temperature/humidity environment(little moisture in the air), however, printing of halftone images can cause fusion, requiringthe operation of the switch to suit the environment as follows:1. Remove the drum heater control PCB. (See p. 4-51P.)2. Shift SW2001-1 on the drum heater control PCB to ON (controlled to 47°C).F04-601-02SW2001-1ON (controlled to 47°C)OFF (default: controlledto 43°C)SW2001ON 1 2J2001T04-601-02SW2001-2Not used
