59 Installation and Service Guide: Printer Controller EB-34
Replacing Parts
3 Remove the power supply (see page 64).
4 Remove the motherboard from the chassis (see page 50).
Place the motherboard on a flat, antistatic surface.
5 Remove the CPU fan cable from motherboard connector CPUFAN.
6 Remove the CPU cooling assembly:
• Rotate each fastener one quarter-turn counterclockwise to the position shown below.
• Pull straight up on each fastener cap until the retaining tang at the tip of the peg is released from the
motherboard.
Figure 23: Removing the CPU cooling assembly
7 Lift the cooling assembly off the CPU socket and set it aside.
8 Unlock the CPU socket lever and raise it into the open position (flex the lever away from the retention post, and
then raise it).
Caution:Be aware that both the cooling assembly and the CPU may be very hot. You may need to allow the
components to cool before you attempt to remove them.
Important: You may need to use moderate force to pull the pegs and pins out of the motherboard.
Be careful not to damage nearby components on the motherboard or the CPU cooling assembly when
pulling up on the fasteners.
1 Screw (1 of 4)
2 Loosen each screw to this position.
Important: Use caution when lifting the cooling assembly off the CPU, because the thermal compound at the
base of the heatsink may damage the CPU if the heatsink is removed too forcefully.
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