HP A4500A - VMEbus Single Board Computer 744 Motherboard Hardware Manual page 125

Adding CPUs and Socket Cleaning
Replacement or installation of a CPU requires that the CPU chip socket be clean and uncontaminated with
dirt and dust particles. The CPU chip socket must be cleaned or replaced if you:
• Replace a system board (using the CPUs from the old system board to populate the new system board).
• Add a CPU to the server.
• Remove a CPU for troubleshooting (to be replaced in the same system board).
• Remove a failed CPU and replace it with a new CPU assembly.
Tools Required
To add or replace a CPU, or to clean a system board socket and the surrounding area, you will need the
following items:
• CPU socket dust cover (HP p/n A3639-40024)
• Electronic Vacuum Cleaner- ESD safe, EMI/RFI line filter, acceptable models and options are:
1. 110V Vacuum (HP p/n 1150-5070, comes with US power cord)
2. 220/240V Vacuum (HP p/n 1150-5071, no power cord, must order item 3 or 4)
3. European power cord (2 meter (6foot)) (HP p/n 5184-0874)
4. U.K. power cord (2 meter (6foot)) (HP p/n 5184-0875)
5. Vacuum filter (0.03 micron) (HP p/n 3150-0785)
A magnifying glass, (at least 3X power) to aid in the inspection of the removed CPU socket.
Cleaning Kit Components
The A3639-70001 CPU socket cleaning kit contains the following items.
• EMI O-ring (HP p/n 5183-3542)
• IPA pre-moistened, lint free wipes (HP p/n 5012-1138)
• thermostrate pad (HP p/n A3614-00014)
• CPU chip socket with dust cover (HP p/n 1253-0703)
The following graphic shows an exploded view of the CPU assembly, with the component names.
Chapter
Adding CPUs and Socket Cleaning
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