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4.5 Fans
Inside the iR-M2 a front fan and back panel fan run continuously when the system is run-
ning. You should hear the fans start as soon as you power on the iR-M2. If you do not hear
the fans, the most likely problem is a faulty power connection (see "To check board and
cable connections" on page 4-9).
The following procedures describe how to remove and replace the front fan and back
panel fan.
4.5.1 Front fan
The front fan circulates air inside the iR-M2 in order to cool integrated circuits within the
system.
a. TO REMOVE THE FRONT FAN
1. Shut down and open the iR-M2 (see page 4-3 and page 4-4).
2. Remove the front Panel (see page 4-7).
3. Remove the fan cable from motherboard connector FAN3.
4. Remove and set aside the two screws that attach the board guide to the chassis (see F04-
102-01 on page 4-2 for the location of the board guide).
5. Unhook and remove the board guide (with front fan attached) from the chassis (see F04-
405-01 on page 4-37).
6. Remove and set aside the two screws (and washers, if present) that attach the front fan to
the board guide.
COPYRIGHT © 2002 CANON INC.
2000 2000 2000 2000
NM-PDL REV.0 JULY 2002
CHAPTER 4 SERVICE PROCEDURE
4-37
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