IBM 7133 D40, Service Manual

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Note: If mainline electrical power is present in the 7133, and the 7133 power
is set to Standby by the power switch (Model D40 only) or by the
remote-power-control unit (both models), the internal dc power switches
on when the operator panel flexible circuit is disconnected from the
controller card assembly. The dc power remains switched on when the
circuit is reconnected.
Step 5. Do the same actions with the latch
1
to unplug the disk drive status lights
flexible circuit from the controller card assembly.
Step 6. Unscrew the two thumbscrews
3
.
Step 7. Pull the controller card assembly out from the 7133.
Note: If mainline electrical power is present in the 7133, the internal dc power
switches on (if previously turned off) when the controller card assembly
is removed. The dc power remains switched on when the controller card
assembly is reinstalled.
Step 8. Replace parts in the reverse sequence.
Notes:
a. Ensure that the latches of the operator panel flexible circuit and the disk
drive status lights flexible circuit engage fully in the slots of the 7133 frame
assembly.
b. If you have installed a replacement controller card assembly, you might
need to reconfigure the 7133 to the using system (see Configuring a 7133
to the Using System in the “Additional Information” appendix (in this book)
for your using system).
Step 9. Important: Using the method that is provided on your using system, check the
level of microcode that is present on the controller card that you have just
installed. Additional information about the latest levels of controller card
microcode is given on the web support page (see Web Support Pages in the
“Additional Information” appendix (in this book) for your using system). If you
need to download the latest microcode, see Controller Card Microcode
Maintenance in the “Additional Information” appendix (in this book) for your
using system.
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7133 Models D40 and T40 Service Guide