Knowing Replaceable Parts - Lenovo ThinkStation P320 Tiny User Manual

Knowing replaceable parts

Customer-Replaceable Units (CRUs)
CRUs are computer parts that a user can upgrade or replace. There are two types of CRUs: self-service and
optional-service.
• Self-service CRUs:
You can install self-service CRUs easily. These CRUs might be standalone, latched, or secured by
up to two screws.
Examples of self-service CRUs include the keyboard, mouse, any USB device, and the power cord. Other
self-service CRUs might include memory modules, adapter cards, hard disk drives, and optical drives.
Note: Users are responsible for replacing all self-service CRUs.
• Optional-service CRUs:
Handling optional-service CRUs requires some technical skills and simple tools (such as a screwdriver).
These CRUs are isolated parts within the computer. They are usually concealed by an access panel that
is secured by more than two screws. You must remove the screws and panel to access the specific CRU.
Optional-service CRUs can be removed and installed by users or, during the warranty period, by a
Lenovo service technician.
Field-Replaceable Units (FRUs)
FRUs are computer parts that a trained technician can upgrade or replace. For detailed FRU information,
such as the FRU part numbers and supported computer models, go to:
http://www.lenovo.com/serviceparts-lookup
CRUs and FRUs locations
Refer to the following illustrations to check the locations of CRUs and FRUs within the computer.
Notes:
• Some of the following parts might look different from the one illustrated.
12
ThinkStation P320 Tiny User Guide and Hardware Maintenance Manual