When Producing Mono Color (Black) Single Sided Prints; When Producing Mono Color (Black) Double Sided Prints - Canon iR C6800 Series Service Manual

9.3.2.4 When Producing Mono Color (Black) Single Sided Prints

A roller tends to be deprived of heat as a result of contact with paper while the machine is making mono color single
sided prints (especially in continuous printing). The machine, therefore, uses the fixing main heater (H1), which has
high output, and executes temperature control at 200 deg C. The outside heating roller is controlled to 225 deg C by
the work of the outside heating roller heater.
Fixing main
heater (H1)
Fixing sub
heater (H2)
Pressure
heater (H3)
External
heating heater (H3)
Fixing motor (M4)
External fixing roller
shift motor (M22)
*1: Rotates at normal speed (276 mm/sec).
*2: Rotates at 1/3 speed (92 mm/sec).
*3: Rotates idly for 1 sec at 1/3 speed every 30 min after the fixing roller stops.
*4: In the case of the 120/230 V model, the 400 W pressure heater is turned on at 200 W equivalent during printing
(by turning on and off the pressure heater for every single cycle of the power supply using the control signal
generated by the DC controller).

9.3.2.5 When Producing Mono Color (Black) Double Sided Prints

The fixing roller is controlled to 200 deg C by the fixing sub heater (H2), and the outside heating roller heater is
controlled to 225 deg C by the outside heating roller heater.
Fixing main
heater (H1)
Fixing sub
heater (H2)
Pressure
heater (H3)
External
heating heater (H4)
Fixing motor (M4)
External fixing roller
shift motor (M22)
Stat key
ON
STBY PRINT
Controlled to 200 deg. C
*4
Controlled to 170 deg. C
Controlled to 225 deg. C
*1
(Engagement)
F-9-13
Stat key
ON
STBY PRINT
Controlled to 200 deg. C
*4
Controlled to 170 deg. C
Controlled to 225 deg. C
*1
(Engagement)
F-9-14
- Fixing roller: 200 deg C
- pressure roller: 140 deg C or higher
- Outside heating roller: 225 edge C
When above is true, starts standby.
LSTR STBY
Controlled to 200 deg. C
Controlled to 170 deg. C
*2 *3
(Disengagement)
: heater full activation.
: heater temperature control.
: heater alternate activation control.
: motor on.
- Fixing roller: 200 deg C
- pressure roller: 140 deg C or higher
- Outside heating roller: 225 edge C
When above is true, starts standby.
LSTR STBY
Controlled to 200 deg. C
Controlled to 170 deg. C
*2 *3
(Disengagement)
: heater full activation.
: heater temperature control.
: heater alternate activation control.
: motor on.
Chapter 9
0003-2896
0003-2897
9-15