Installing The 21164 Microprocessor - DEC AlphaPC 164LX User Manual

Increasing Microprocessor Speed
6. Remove the heat sink by gently lifting it off the microprocessor.
7. Remove and discard the GRAFOIL heat conduction pad.
8. Thoroughly clean the bottom surface of the heat sink before affixing it to the
new microprocessor.
9. Lift the ZIF socket actuator handle to a full 90° angle.
10. Remove the microprocessor chip by lifting it straight out of the socket.

5.3.4 Installing the 21164 Microprocessor

Install the new microprocessor in location U40 by performing the following steps:
Note:
1. Observe antistatic precautions.
2. Lift the ZIF socket actuator handle to a full 90° angle.
3. Ensure that all the pins on the microprocessor package are straight.
4. The ZIF socket and microprocessor are keyed to allow for proper installation.
Align the microprocessor, with its missing AD01 pin, with the corresponding
plugged AD01 position on the ZIF socket. Gently lower into position.
5. Close the ZIF socket actuator handle to its locked position.
6. Install the heat sink and heat-sink fan as directed in the following steps. A heat-
sink/fan kit is available from the vendor listed in Appendix A . Refer to Figure 5–1
for heat-sink and fan assembly details.
Memory and Microprocessor Configuration
5–4
Install the heat sink only after the microprocessor has been assembled to
the ZIF socket.