Replacing A Cpu And Heatsink/Fan Assembly; Removing A Cpu From An Ultra 40 - Sun Microsystems Ultra 40 Service Manual

10. Install the side cover and the access panel, power on the system, and verify the
installation.
Refer to
5.6 Replacing a CPU and Heatsink/Fan
Assembly
This section describes how to remove and replace the CPU and heatink/fan
assembly on a Sun Ultra 40 Workstation.
Note – The CPU should be replaced only by trained field service technicians.
Each CPU is associated with a heatsink, which must be replaced with the CPU.
On single CPU systems, a bridge plug is plugged in to the CPU1 socket.
Note – System cooling might be affected by dust and contaminant build-up. It is
recommended that systems be opened and checked approximately every six months
or more often in dirty operating environments. Check system heatsinks, fans, and air
openings. If necessary, clean systems by brushing or blowing contaminants or
carefully vacuuming contaminants from the system.
5.6.1

Removing a CPU from an Ultra 40

To remove a CPU from an Ultra 40:
1. Open and position the chassis.
Refer to Refer to
2. Unfasten the heatsink power cable from the motherboard connector labeled CPU0
Fan or CPU1 Fan. See
Caution – Heatsinks can get extremely hot. To avoid personal injury, allow
sufficient time for them to cool before touching them.
5-38 Sun Ultra 40 Workstation Service Manual • November 2006
Section 8.1, "Reassembling the Workstation" on page
Section 4.3, "Preparing the Workstation for Servicing" on page
FIGURE 5-21
.
8-1.
4-4.