CDA maintenance User's Guide Page 52

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CDA 7 Maintenance Manual
3-2 77 A7 48UU Rev03
3.1 ORU Classes
There are two classes for ORU replacement:
Class A, "non-disruptive procedure": Those that can be removed and replaced
while the system remains on-line.
Class B, "disruptive procedure": Those that must be removed and replaced
off-line.
Table 3-1. ORU Classes
Class A
Not PC Menu Driven
Class A
PC Menu Driven
Class B
DISK DIRECTOR
X
Channel DIRECTOR
X
Memory Card
X
Adapter Card
X
Disk-drive
X
COM Card
X
Power Supply
X
PDM
X
Battery
X
LAP-TOP
X
Fan Unit
X
Microcode
XX
Operator Panel
X
NOTE:
ORUs replaced with the assistance of a PC Lap-Top are distinguished from
other ORUs. A number of components do not appear in this table since they are
obviously replaced off-line.
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