Fans; Overview - Canon SADDLE FINISHER K3 Service Manual

CHAPTER 2 OPERATION OVERVIEW

8 FANS

8.1.1 Overview

The finisher is equipped with the two fans described in Table 2-801.
The power supply fan rotates when the drive signal (FANON) from the finisher controller
PCB is "0". While rotating, the power supply fan sends the FANSTP signal to the finisher
controller PCB. When the fan is not rotating, the signal changes to "1", causing the finisher
controller PCB to judge that the fan has stopped and to display an error code on the copier's
control panel.
The feed cooling fan rotates when the drive signal (PFANON) from the finisher controller
PCB is "0". While rotating, the feed cooling fan sends the PFANSTP signal to the finisher
controller PCB. When the fan is not rotating, the signal changes to "1", causing the finisher
controller PCB to judge that the feed cooling fan has stopped and to display an error code on
the copier's control panel. (E551, 01: power supply fan, 02: feed cooling fan)
Figure 2-802 shows the location of the fans and the flow of air. Figure 2-801 shows the
timing with which the fans turn ON.
No. Name
FM1 Power supply fan
FM2 Feed cooling fan
Sequence of fan operation
Copier/ finisher
power supply
Power supply fan
(FM1)
Feed cooling fan
(FM2)
*: The feed cooling fan only operates when paper is being fed.
2-84
COPYRIGHT© 2001 CANON INC.
Direction
Blowing
Blowing
T02-801-01
Power Start
supply key
ON ON
*
F02-801-01
2000 2000 2000 2000
Filter
None Cools the switching regulator
None Cools the feed path
Power
Copy
supply
Finished
OFF
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001
Purpose