IBM 7133 D40, Руководство по обслуживанию

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Chapter 3. Removal and Replacement Procedures
Are You Using the Correct Book? Do not use this book if you are servicing a 7133
Model 010, 020, 500, or 600 SSA Disk Subsystem. For the correct book, see Related
Publications in the “Additional Information” appendix (in this book) for your using
system.
These instructions describe how to remove field-replaceable units (FRUs) from the 7133
Models D40 and T40.
Each FRU has its own removal procedure, for example, “Power Supply Assembly”.
Where a step in a specific procedure represents a complete procedure that is described
separately, a reference to that procedure is given.
The references show you where to find more detail, if you need it.
Note: Because these instructions relate to Model D40 and to Model T40, some
diagrams might not specifically show the model that you are servicing.
Concurrent Maintenance
Subject to the configuration of the 7133, most FRUs can be removed, replaced, and
tested while the subsystem and using system are powered on and doing productive
work. This ability is called ‘concurrent maintenance’. Unless you have a particular
reason to do so, do not remove the power unless these instructions tell you to do so.
The following FRUs can be maintained concurrently in a fully-configured subsystem:
v
Fan assembly
v
Power supply assembly
v
Disk drive module
v
Dummy disk drive module
v
Controller card assembly
v
Operator panel assembly and flexible circuit (Model D40 only)
v
Disk drive status light assembly (Model D40 only)
v
External SSA cable.
The following FRUs cannot be maintained concurrently:
v
Bypass card, because it contains two separate SSA interfaces
v
Operator panel assembly and flexible circuit (Model T40 only)
v
Disk drive status light assembly (Model T40 only).
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