Chapter 4. Multiaccess Enclosure FRU Exchange
Important
The SAC, system card, and a single power supply are not
hot pluggable
.
This means that you must switch off power to the adapter when replacing either
of them. Other FRUs are hot pluggable and can be exchanged without
powering OFF the Multiaccess Enclosure, although the adapter or other FRU
must be reset before new configurations can take effect. Follow carefully the
procedure described.
Before removing an adapter, be sure that the corresponding resource has been
disabled
by the operator at the operator console.
Each time you change a FRU, carefully record its location and check that the
attached cables are correctly labeled and reconnected.
In the following table, find the FRU you want to exchange and go to the procedure
indicated.
Table 4-1. FRU Exchange
FRU Name Go to
Power Supply If you have:
Only one power supply installed in your multiaccess
enclosure go to “Prerequisite Before some FRU
Exchanging” on page 4-2.
Two power supply installed in your multiaccess
enclosure go to “Exchanging a Power Supply” on
page 4-4.
System card “Exchanging the System Card” on page 4-5
PCMCIA card “Prerequisite Before some FRU Exchanging” on page 4-2
SAC “Prerequisite Before some FRU Exchanging” on page 4-2
Hard drive “Prerequisite Before some FRU Exchanging” on page 4-2
DIMM “Prerequisite Before some FRU Exchanging” on page 4-2
Fan tray “Prerequisite Before some FRU Exchanging” on page 4-2
Adapter type
xxx
(except ESCON adapter
and
Channel adapter)
“Exchanging an Adapter” on page 4-42
ESCON Adapter “Exchanging the ESCON Adapter” on page 4-48
ISDN Daughter Card “Exchanging the ISDN Daughter Card” on page 4-46
Channel Adapter “Parallel Channel Adapters Installation and Removal” on
page 3-40
Backplane “Prerequisite Before some FRU Exchanging” on page 4-2
Copyright IBM Corp. 1998, 1999 4-1
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