Canon imagePASS-P1, Service Manual, Page: 29 / 70

To replace motherboard components
1. Replace the following cables to the motherboard (see “Checking imagePASS internal connections” on page 14 ):
• 10-pin power button cable
Connect one end of the 10-pin power button cable to J351 connector on the printer interface board. Connect the other
end to the J15 connector on the motherboard. The cable connector is keyed to fit only one way.
• Service board cable
• 24-pin power cable. The cable connector is keyed to fit only one way.
• 4-pin power cable. The cable connector is keyed to fit only one way.
• HDD data cable
• Chassis fan cable
2. Replace the printer interface board (see “Printer interface board” on page 16 ).
3. Reassemble the imagePASS (see “Restoring imagePASS functionality after service” on page 34 ).
■ CPU and CPU cooling assembly
The CPU is installed in a socket on the motherboard. Before removing the CPU from its socket, remove the motherboard from
the chassis (see
“Motherboard jumpers” on page 19 ), disconnect the CPU fan cable from the motherboard, and remove the cooling
assembly from the CPU socket (see below Figure).The CPU cooling assembly consists of a fan and a heatsink.
NOTE:
Do not remove the CPU fan from the heatsink.
1
2
3
4
5
6
Figure 16: CPU cooling assembly
No. Item No
.
Item
1 CPU fan 4 Socket lever
2 Heatsink 5 CPU socket on motherboard
3. REPLACING PARTS
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