Fujitsu M10-4 Service Manual page 324

The PSU backplane unit has connectors for connecting multiple power supply units.
Caution - Do not replace a PSU backplane unit at the same time as a CPU memory
unit. If you replace a PSU backplane unit at the same time as a CPU memory unit, the
system may fail to operate normally. Replace either the PSU backplane unit or the
CPU memory unit, and confirm that the newly installed part is normal by using the
showhardconf or showstatus command. Then, replace the other FRU.
Figure 13-1 Location of the PSU backplane unit
Location
number
1
310 Fujitsu M10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･ June 2023
Component
PSU backplane unit (PSUBP)
(1)