IBM 7133 D40 Service Manual page 221

Serial disk systems
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Figure 114. Jumpers Set for Forced Inline Mode
Step 11. If you are installing a new bypass card, go to step 12.
If you are changing the jumper settings of a card that has been operational,
go to step 13.
Step 12. Check whether the jumpers on the new card are set for the same mode as
are the jumpers on the card that you have just removed.
If it is set for the same mode, you can now install the new bypass card. Go to
step 14.
If it is not set for the same mode, you must change the positions of the
jumpers on the new card. Go to step 13.
Step 13. Remove the jumpers, and install them into the required positions.
Step 14. Replace parts in the reverse sequence. Ensure that you push the cards fully
home.
Note: When you reinstall the external SSA cables, ensure that you use the
special screwdriver (SSA tool, part 32H7059) to tighten the SSA
connector screws.
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Chapter 3. Removal and Replacement Procedures
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203

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