Canon LBP-1120 Service Manual page 35

CHAPTER 2
3. Cleaning Page
The printer executes a cleaning page sequence by the command sent from the interface controller. The cleaning page
cleans the pressure roller.
Receiving a cleaning page execution command from the interface controller, the engine controller conducts the
paper pickup operation. Then, the engine controller adjusts the fixing temperature at 200°C and feeds the paper 4mm
at a time by step-driving the main motor. This fuses the toner adhering to the pressure roller and moves it to the paper.
Note:
The paper used for the cleaning page must be the maximum width in the scanning direction (indicated
in the specifications) and 240 mm or more in the feeding direction.
4. Thick Paper Mode
The printer contains a thick paper mode and a thick paper H mode.
This mode is activated by a command sent from the interface controller. The mode is effective until a command for
the other paper mode is sent from the interface controller.
The thick paper mode implements the following controls:
• Rises the fixing heater target temperature : higher than usual (in the plain paper mode).
• Delays the paper pickup timing for the first page : 5.5 seconds later than usual.
• A delay is introduced to the pickup timing between 4 and 24 sec to suit the number of prints and selected mode:
if A4 and a delay of 4 sec, 6 ppm.
if A4 and a delay of 24 sec, 2 ppm.
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