IBM 8872 Service Guide - Page 145

Power, backplane

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Power backplane To remove the power backplane, complete the following steps: 1. Read the safety information that begins on page vii and "Installation guidelines" on page 99. 2. Turn off the server and peripheral devices, and disconnect the power cords and all external cables necessary to replace the device. 3. Remove the top cover and bezel (see "Top cover and bezel" on page 113). 4. Remove all fans (see "Hot-swap fan" on page 105). 5. Remove the memory cards (see "Removing and replacing a memory card" on page 108). 6. Lift the microprocessor-tray release latch, open the microprocessor-tray levers, and pull the microprocessor tray out of the server slightly (see "Removing and installing a microprocessor" on page 122). 7. Remove the power supplies and the power-supply structure (see "Power-supply structure" on page 119). 8. Remove the screws that secure the power backplane to the chassis and lift the power backplane out of the server. 9. If you are instructed to return the power backplane, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you. To install the replacement power backplane, complete the following steps: 1. Align the power backplane in the server and secure the power backplane with screws. 2. Install the power-supply structure and the power supplies. 3. Slide the microprocessor tray in the server and close the microprocessor-tray levers. 4. Install the memory cards. 5. Install the fans. 6. Install the top cover and bezel (see "Top cover and bezel" on page 113). 7. Slide the server into the rack. Chapter 4. Removing and replacing server components 129

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Power
backplane
To
remove
the
power
backplane,
complete
the
following
steps:
1.
Read
the
safety
information
that
begins
on
page
vii
and
“Installation
guidelines”
on
page
99.
2.
Turn
off
the
server
and
peripheral
devices,
and
disconnect
the
power
cords
and
all
external
cables
necessary
to
replace
the
device.
3.
Remove
the
top
cover
and
bezel
(see
“Top
cover
and
bezel”
on
page
113).
4.
Remove
all
fans
(see
“Hot-swap
fan”
on
page
105).
5.
Remove
the
memory
cards
(see
“Removing
and
replacing
a
memory
card”
on
page
108).
6.
Lift
the
microprocessor-tray
release
latch,
open
the
microprocessor-tray
levers,
and
pull
the
microprocessor
tray
out
of
the
server
slightly
(see
“Removing
and
installing
a
microprocessor”
on
page
122).
7.
Remove
the
power
supplies
and
the
power-supply
structure
(see
“Power-supply
structure”
on
page
119).
8.
Remove
the
screws
that
secure
the
power
backplane
to
the
chassis
and
lift
the
power
backplane
out
of
the
server.
9.
If
you
are
instructed
to
return
the
power
backplane,
follow
all
packaging
instructions,
and
use
any
packaging
materials
for
shipping
that
are
supplied
to
you.
To
install
the
replacement
power
backplane,
complete
the
following
steps:
1.
Align
the
power
backplane
in
the
server
and
secure
the
power
backplane
with
screws.
2.
Install
the
power-supply
structure
and
the
power
supplies.
3.
Slide
the
microprocessor
tray
in
the
server
and
close
the
microprocessor-tray
levers.
4.
Install
the
memory
cards.
5.
Install
the
fans.
6.
Install
the
top
cover
and
bezel
(see
“Top
cover
and
bezel”
on
page
113).
7.
Slide
the
server
into
the
rack.
Chapter
4.
Removing
and
replacing
server
components
129