
COPYRIGHT © 2002 CANON INC.
2000 2000 2000 2000
NM-PDL REV.0 JULY 2002
CHAPTER 4 SERVICE PROCEDURE
4-22
4.2 Motherboard
The motherboard has one Intel Pentium III 866MHz CPU that controls the image data
transferred to and from the copier interface board. The motherboard also controls HDD
functions and the communication between the iR-M2 and external devices. The
motherboard has 3 DIMM sockets. One of the sockets contains a 128MB DIMM, for a total
of 128MB of memory (see F04-403-01 on page 4-28). The motherboard also includes six
32-bit PCI (Peripheral Component Interconnect) connectors.
4.2.1 Removing the motherboard
The motherboard attaches to the side of the chassis above the power supply. Before you
remove the motherboard, you must remove:
• All boards installed on the motherboard
• Power supply
• All cables connected to the motherboard (these include the power cable, front fan cable,
back panel fan cable, HDD ribbon cable, CD-ROM drive ribbon cable, and UIB cable)
This section also includes information on the following:
• Replacing or adding the DIMM
• Replacing the CPU
• Replacing the battery
• Jumper configuration
• Replacing the BIOS chip
1. Power off and open the iR-M1 as described on page 4-3 and page 4-4. For stability dur-
ing service, remove the front panel as described on page 4-7.
2. Remove the screw on the side of the port bracket that secures the copier interface board
to the port bracket.
3. Remove the copier interface board from motherboard connector J17.
Grasp the board at the sides. Gently pull the board straight up, until it releases from the
connector.
4. Place the copier interface board in an antistatic bag.
Follow precautions when handling components (see page vi).
Chapter_04.p65
02/07/25, 11:28
22