NEC ExpressA1160 - Manual (Page 197)

Section 11
Removing and Replacing CRUs
Customers are able to replace some faulty system components, called
customer-replaceable units (CRU). Use the information and procedures in this section to
determine if a faulty component is a CRU and how you can replace it.
11.1. Replaceable Units
This system contains a number of replaceable units that are designed to be serviced by
the customer. However, hardware diagnostic error reporting does not differentiate
between the two types of replaceable units. Any device that fails is identified as a
field-replaceable unit (FRU). Use the following lists to determine which units are
customer-replaceable units (CRUs) and which are FRUs.
Customer-Replaceable Units (CRUs)
The following are CRUs:
y DIMMs
y DVD drive
y Fan modules
y Hard drives
y Memory board
y PCIe cards and carriers
y Power supply
Field-Replaceable Units (FRUs)
The following are FRUs:
y EXPRESSSCOPE® Monitor
y Drive tray
y Interconnect cable
y I/O riser board
y Main logic module