(1)
(2)
Location
number
Component
1 Powersupply unit(PSU#0)
2 Powersupply unit(PSU#1)
Note- Read andunderst and the instructions in this chapter before starting the maintenance
work.Also see t he contents of "Chapter 1 BeforeStartin g Maintenance Work."
Figure18-1 Locations of power supply units
18.2 Before Maintaining a Power Supply
Unit
Thissection describes the types and flow of maintenance of the power supply units,
aswell a s some precautions.

18.2.1 Types of maintenance

Table18-1 lists the types of maintena nce for the power supply units. For the
definitionof maintenance, see "4.3 Understanding Types of Maintenance."
FujitsuM10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･December 2013318