Sun Microsystems Sun Blade 150 Service Manual page 124

Caution – Use proper ESD grounding techniques when handling components. Wear
an antistatic wrist strap and use an antistatic mat. Store ESD-sensitive components in
antistatic bags before placing them on any surface.
2. If necessary, remove any installed PCI cards to provide space to work.
See Section 8.4.1, "Removing a PCI Card" on page 8-10.
Caution – The CPU will be damaged if you replace it incorrectly. Before you
remove the CPU, look at the CPU and observe where the diagonally cut corner
("key") of the CPU fits onto the socket. Viewed from the front of the system chassis,
the key is at the left rear corner of CPU (
3. Disconnect the fan power connector at J-22 on the motherboard (
4. Press the tab on the front of the heatsink retaining clip.
5. Release the tab on the back of the heatsink retaining clip.
6. Gently remove the heat sink and fan from the CPU.
7. Gently remove the EMI grounding ring.
The grounding ring connects to the motherboard with four inserts or "legs".
8. Lift the CPU locking lever to free the CPU from the socket.
Caution – Be sure that you lift the locking lever all the way back until it is vertical.
The CPU could be damaged if the lever is not fully released.
Caution – The CPU socket is permanently attached to the motherboard: do not
attempt to lift the socket off the motherboard.
9. Gently lift the CPU from the socket.
If the CPU does not lift off easily, ensure that the locking lever is fully released.
10. Place the CPU on an antistatic mat with the pins facing up.
8-2 Sun Blade 150 Service Manual • June 2002
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FIGURE 8-1
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FIGURE 8-1