Canon imageRUNNER ADVANCE 4551i Service Manual page 150

*2: The fan control in PRINT/LSTR performs full speed/half speed drive/stop depending on print mode and fix control temperature.
*3: The fan operates for approx. 1 minute at a maximum depending on the setting of "Auto Sleep Timer". When the machine exits
from Deep Sleep due to the Control Panel power ON/OFF or job query from network without job, the fan operates for approx. 10
minutes.
Related service modes
• Change of rotational speed for paper edge cooling fan (Lv.2)
COPIER > ADJUST > FIXING > FN-MV-SW
• Fan drive extension mode after job (Lv.2)
COPIER > OPTION > FNC-SW > FAN-EXTN
■ Fixing film edge cooling fan (rear)/(front) control
Purpose
These fans are used to prevent the sections where paper is not fed from heating excessively when narrow paper (narrower than
the A4 size (297 mm)) is fed.
These fans are used for the following purpose when paper wider than the A4 width (297 mm) is fed.
• Cool paper that has passed through the fixing unit.
• Cool paper to prevent the adhesion of paper interval on the delivery tray.
Overview
• [A]: When paper narrower than the A4 width (297 mm) is fed, the air outlet of the paper edge cooling fan (rear)/(front) opens
to blow air to both ends of the fixing film, thus cooling the sections where paper is not fed.
• [B]: When paper wider than the A4 width (297 mm) is fed, the air outlet of the fixing film edge cooling fan (rear)/(front) closes
to cool paper that has passed through the fixing unit and paper on the delivery tray.
Control sequence
1. The shutter motor (M8) is energized and the shutter HP sensor (S10) detects the edge cooling shutter.
Fixing
Assembly
FM1/2
137
2. Technology