IBM 7133 D40, Service Manual

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Bypass (SNBC) Cards
Attention:
v
The bypass cards are electrostatic-discharge (ESD) sensitive. Use the tools and
procedures defined by your organization to protect such parts.
v
Before you remove a bypass card, check the configuration of the 7133 to find out
which disk drive modules are affected by the removal of this particular bypass card.
Ensure that all disk drive modules so affected are no longer available to the using
system.
Note: Unless you have a particular reason to do so, do not switch off the using system
or the 7133 when removing or installing a bypass card.
Step 1. Refer to Figure 112.
Step 2. If you are removing more than one bypass card, make a note of which SSA
cables (if present) are connected to each particular bypass card.
Step 3. Disconnect the external SSA cables (if present) from the card, or cards, that
you are going to remove. To prevent damage to the SSA connector screws,
1 2
3 4
1
2 3
4
Figure 112. Removing the Bypass Cards
Chapter 3. Removal and Replacement Procedures
201