Canon BJ-W3000 Service Manual page 121

CHAPTER 2. BASIC OPERATION
• Suction fan (FM1)
When the PE sensor detects the paper, the fan drive signal (FAN_CONT) changes to "1" and
the suction fan (FM1) runs.
The suction fan continues to run constantly while the paper is being transported during the
printing operation, to prevent the paper from floating away from the platen. However, if the
platen does not carry the media even though the PE sensor detects the media, the suction fan
stops after 60 seconds.
To carry the paper after the suction fan stops, the printer starts the suction fan again and starts
the carriage operation.
• Cooling fan (FM2)
The cooling fan (FM2) runs at the same time as the suction fan (FM1), discharging the air
heated by the DC power supply, to prevent the power supply from overheating. If the cooling
fan rotation signal (FANSTS) is not detected while the cooling fan is running, error code
"E01501" is indicated on the message display.
FM1
Suction Fan
FM2
Cooling Fan
2–64
Engine controller
J5 J204
-1 -1 -1
-2 -2
-2
J206
-1
-2
-3
Figure 2-602
+26V
N F
+
+5V +5V
+5V
FANSTS
FAN_CONT