Chapter 3. Customer Replaceable Units (CRUs)
Customer Replaceable Units (CRUs) are computer parts that can be upgraded or replaced by the customer. There are two types of CRUs: Self-service CRUs and Optional-service CRUs. Self-service CRUs are easy to install. They might be standalone, latched, or require a screwdriver to remove a maximum of two screws. However, Optional-service CRUs require some technical skills and in some cases might also require simple tools, such as a screwdriver. However, both Self-service and Optional-service CRUs are safe for the customer to remove.
Customers are responsible for replacing all Self-service CRUs. Optional-service CRUs can be removed and installed by customers or by a Lenovo service technician during the warranty period. Lenovo servers contain both Self-service and Optional-service CRUs.
vSelf-service CRUs: These CRUs unplug or are secured by no more than two screws. Examples of these types of CRUs include the keyboard, the mouse, any USB device, and the power cord. Other Self-service CRUs depending on product design might include memory modules, adapter cards, hard disk drives, and optical drives.
vOptional-service CRUs: These CRUs are isolated parts within the server and are concealed by an access panel that is typically secured by more than two screws. Once the access panel is removed, the specific CRU is visible.
vBoth types of CRUs are listed in the following table.
The Installation and User Guide provides instructions on how to replace Self-service CRUs and Optional-service CRUs. Refer to the following table to determine which publication contains the instructions you need. The publications are available on the ThinkServer Documentation DVD and also the Lenovo Web site at:
http://www.lenovo.com/support
Table 1. CRUs for the TD230 server
List of machine types: 1039, 1040, 1027, and 1029.
| Self-service CRUs | | Optional-service CRUs |
v | Memory module | v | Optical drive |
v | Mouse | v | Fans |
v | Keyboard | v | Hard disk drive |
vEthernet/RAID cards
