D. Driving the Cleaning BeltThe cleaning belt used to clean the upper fixing roller is driven by turning on and offthe cleaning belt solenoid (SL4) by causing the cleaning belt solenoid drive command(CBSD*) generated by the DC controller circuit to go ‘1’ and ‘0’. The cleaning belt istaken up about 0.04mm each time the cleaning belt solenoid is turned ON.The area of contact between the cleaning belt and the upper fixing roller is increasedto improve clearing efficiency by means of a cleaning belt guide plate.The cleaning belt solenoid (SL4) is turned on as soon as copy paper reaches theseparation sensor (PS10); the number of times the solenoid is turned ON, further, variesaccording to the length of copy paper.Figure 6-203The DC controller keeps count of the activation of the cleaning belt solenoid, andissues ‘E005’ when the count reaches 250,000.The count can be cleared by resetting the cleaning belt counter (‘619’ in servicemode; for details, see Chapter 11 “Service Mode.”)CHAPTER 6 FIXING SYSTEMCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 6-7Length of copy paperLess than 216mm216mm or moreActivation (ON/OFF)OnceTwiceFixing main heater (H1)Fixing sub heater (H2)Cleaning belt solenoid(SL4)Main motor (M1)Wait indicatorDelivery sensor (PS11)WMUP SCFW SCRV SCFW SCRV LSTRSTBY INTRWMUPR STBYON ONPower switch COPY START keygreen red
