Lenovo ThinkStation P620, Hardware Maintenance Manual

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Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air
gaps. The hexagonal socket is used to pick up the antenna connectors.
Major FRUs and CRUs
Your computer contains the following types of CRUs and FRUs:
• Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by
trained service technicians at an additional cost.
• Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill
level. Trained service technicians can also provide service to install or replace the parts under the type of
warranty designated for the customer’s machine.
• FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers
choose to replace the FRUs by themselves, the product warranty might be affected.
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P620 Hardware Maintenance Manual