Lenovo K4450 Notebook - Manual (Page 41)

– Self-service CRUs: These CRUs unplug or are held by no more than two screws. Examples of these types
of CRUs include the ac power adapter, power cord, battery, and hard disk drive. Other self-service CRUs
depending on product design might include the memory module, wireless card, keyboard, and palm rest
with finger print reader and touch pad.
– Optional-service CRUs: These CRUs are isolated parts within the computer that 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.
Major FRUs and CRUs
This exploded illustration helps Lenovo service technicians identify FRUs or CRUs that they may need
to replace when servicing a customer’s computer.
Refer to “Part numbers for orderable FRUs and CRUs” on page 38 if you need to look up Lenovo part
numbers for a particular FRU or CRU.
Chapter 6 . Locations 35