266 Upgrade and Maintenance Manual TX140 S1
Expansion cards and backup units
Ê When working on a rack-mounted server, secure it in the rack as described
in section "Sliding the server into the rack" on page 89.
If the server has been completely removed from the rack for maintenance
purposes, reinstall and secure it in the rack as described in section
"Mounting the server in the rack" on page 87.
Ê Reconnect the AC power cord to the power supply unit and secure it with a
cable tie as described in section "Connecting the server to the mains" on
page 90.
Ê If applicable, close the rack door as described in section "Closing the rack
door" on page 92.
9.3.5 Replacing a BBU
V CAUTION!
Do not throw battery backup units into the trash can. Batteries must be
disposed of in accordance with local regulations concerning special
waste.
For further safety information, please refer to section "Environmental
protection" on page 51.
9.3.5.1 Required tools
● Preliminary and concluding steps: tool-less
● Replacing a BBU: tool-less
9.3.5.2 Preliminary steps
Before replacing a BBU, perform the following steps:
Ê Disable boot watchdog functionality as described in section "Disabling
SVOM boot watchdog functionality" on page 94.
Upgrade and Repair Units (URU)
Average task duration: 10 minutes
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