(3)
(2)
(1)
Location
number
Component
1 Crossbarunit (XB UX#0)
2 Crossbarunit (XB UX#1)
3 Crossbarunit (XB UX#2)
Note- Read andunderstan d the instructions in this chapter before starting the maintenance
work.Also see t he contents of "Chapter 1 BeforeStartin g Maintenance Work."
Figure16-1 Locationof crossbar units
16.2 Before Maintaining a Crossbar Unit
Thissectio n describes the types and flow of maintenance of the crossbar units.

16.2.1 Types of maintenance

Table16-1 lists the types of maintena nce for the crossbar units. For the definition of
maintenance,see "4.3 Understanding Types of Maintenance."
FujitsuM10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･December 2013298