Frame Assembly
Notes:
1. Use this procedure only if you are exchanging the frame of the 7133. If you are
removing a complete Model D40 from the rack (for example, to locate it elsewhere),
go to “Removing a 7133 Model D40 from a Rack” on page 221.
2. You will need another service representative to help you remove the frame 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.) See 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. Verify with the customer that all operations between the 7133 and the using
system have been stopped.
Step 3. Remove power from the 7133 (see “All Power” on page 145).
Step 4. For Model D40, remove the front cover (see “Covers” on page 138).
For Model T40, open the front cover (see “Covers” on page 138).
Step 5. For Model T40, open the back cover (see “Back Cover (Model T40)” on
Step 6. Carefully make a note of the locations of the disk drive modules and (if
present) dummy disk drive modules that are in the 7133. This action ensures
that you reinstall the modules into their original slots. (They might not all be
connected to the same SSA loop.) It is recommended that you attach
identifying labels to the modules.
Step 7. Remove all the disk drive modules and dummy disk drive modules (see
“Removing a Module” on page 150).
Step 8. Remove the three fan assemblies from the front of the 7133 (see “Fan
Step 9. Remove the controller card assembly (see “Controller Card Assembly” on
Step 10. Remove the two power supply assemblies from the back of the 7133 (see
“Power Supply Assemblies” on page 162).
Step 11. Make a note of which SSA cables (if present) are connected to each
particular bypass card.
208
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