IBM 7133 D40, Руководство по обслуживанию

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Removing a 7133 Model D40 from a Rack
Notes:
1. Use this procedure only if you are removing a complete Model D40 from the
rack (for example, to locate it elsewhere). If you are exchanging the frame of the
7133, go to “Frame Assembly” on page 208.
2. You will need another service representative to help you remove the 7133 from the
rack.
Attention: Unless the using system needs to be switched off for some other reason, do
not switch off the using system when servicing the 7133. Power cables and external
SSA cables that connect the 7133 to the using system can be disconnected while that
system is running.
Step 1. If this 7133 is connected to an operational SSA network, use the SSA service
aids, the 7133 service aids, or both, to ensure that all SSA loops that pass
through the internal strings of this 7133 are not broken. (For example, all
external SSA cables are connected correctly; all disk drive modules and, if
required, dummy disk drive modules are installed correctly.) An example
screen is shown in Displaying Link and Power Problems in the “Additional
Information” appendix (in this book) for your using system.
If a loop is broken, repair it before you start to remove the 7133 from the rack;
otherwise, the network might fail when you disconnect the 7133.
Step 2. If not already done:
a. Verify with the customer that all operations between the 7133 and the
using system have been stopped.
b. If applicable, unconfigure the 7133 from the using system. For more
information, see Unconfiguring a 7133 from the Using System in the
“Additional Information” appendix (in this book) for your using system.
c. Make a note of the positions of all the external SSA cables that are
connected at the back of the 7133.
d. Disconnect all the external SSA cables from the back of the 7133. To
prevent damage to the SSA connector screws, ensure that you use the
special screwdriver (SSA tool, part 32H7059) to unscrew them. The
screwdriver is supplied with the 7133.
e. Remove all power from the 7133 (see “All Power” on page 145).
f. Open the front cover (see “Covers” on page 138).
Chapter 3. Removal and Replacement Procedures
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