Canon ColorPASS-GX400 Installation And Service Manual page 66

S P
ERVICE ROCEDURES
T
O REPLACE THE MOTHERBOARD
1 If you are installing a new motherboard, do the following:
• Unpack the new motherboard.
• Open the load plate covering the CPU socket (see
plastic cover on the CPU socket on the new motherboard. Later, you will transfer the
protective plastic cover to the CPU socket of the old motherboard to protect the circuitry.
• Remove the DIMMs from the old motherboard and install them on the new motherboard
(see page 76).
• Remove the CPU and cooling assembly from the old motherboard and install them on the
new motherboard (see
cooling assembly fan cable when transferring the cooling assembly to the new
motherboard.
When transferring the CPU to the new motherboard, make sure to use the fresh thermal
compound that came with the new motherboard. For more information about the thermal
compound, see page
Do not transfer the BIOS chip from the old motherboard onto the new motherboard. Doing
so can damage the ColorPASS. BIOS chips are not interchangeable.
2 Install the motherboard in the chassis.
Angle the motherboard so that the back panel connectors on the motherboard fit into the
cutouts in the back of the chassis (see
Make sure that the flexible grounding tabs on the cutouts for the network ports make contact
with the outside of the ports. Do not allow the tabs to fold over or become bent inside the
ports. The ports will not function if the tabs are placed improperly. Take care when lowering
the new motherboard into the chassis. Do not strike the motherboard against the metal
standoffs attached to the chassis, as doing so can damage the components on the underside of
the motherboard.
3 Align the mounting holes on the motherboard with the standoffs located in the base of the
chassis.
4 Secure the motherboard to the chassis using the nine mounting screws that you removed
earlier.
Partially tighten each screw before completing tightening any one screw. Do not overtighten
the screws; doing so could damage traces on the motherboard.
You are now ready to complete motherboard installation.
page 78). Make sure that the cable cover (if present) remains on the
81.
Figure 22 on page
page 80) and remove the protective
63).
66