Canon imagePASS-P1, Service Manual, Page: 32 / 70

3. Place the CPU in the socket (see above Figure).
The CPU and the socket are keyed to ensure correct installation. The notches on the edges of the CPU correspond with the
two small posts inside the socket. Align the yellow triangle on the CPU with the flat corner of the socket. A yellow arrow
stenciled on the motherboard next to the socket points to the flat corner. Do not force the CPU.
1
Figure 19: Locating the flat corner of the CPU socket
No. Item
1 Flat corner of socket
4. Close the load plate.
5. Lower the socket lever and place it in the locked position under the retention post.
6. Prepare the CPU cooling assembly for installation.
• Make sure that the motherboard is placed on a padded, antistatic work surface.
• Apply the fresh thermal compound square, as described in step 1.
• Align the cooling assembly so that when it is installed, the fan cable easily reaches the CPU fan power connector CPU
FAN on the motherboard.
7. Place the cooling assembly on the CPU.
• Make sure that the thermal pad on the underside of the heatsink is positioned on top of the CPU.
CAUTION:
Be sure to remove any protective material that may be covering the surface of the thermal pad. Otherwise, the
CPU may overheat.
• Align the four screws with the four screw posts.
• Tighten the screws. Partially tighten all the screws before tightening any one screw all the way.
8. Connect the CPU fan cable to the motherboard connector CPU FAN.
The cable connector is keyed to fit only one way. Make sure that the connector on the cable is securely attached to connector
CPU FAN on the motherboard.
9. Install the motherboard in the chassis (see “Motherboard jumpers” on page 19 ).
10. Replace the motherboard components (see “Motherboard jumpers” on page 19 ).
11. Reassemble the imagePASS and verify its functionality (see “Restoring imagePASS functionality after service” on page
34 ).
12. If you installed a new CPU, configure the time and date in Setup (see “Motherboard jumpers” on page 19 ).
■ Service board
The service board contains the LED display and service switches.
To remove the service board
1. Access and open the imagePASS, as described on “Accessing the imagePASS” on page 13 .
2. Disconnect the service board cable from the service board and motherboard.
3. If you are replacing the service board cable, remove the cable from the plastic clips that secure it to the chassis.
3. REPLACING PARTS
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