ensure that you use the special screwdriver (SSA tool, part 32H7059) to
unscrew them. The screwdriver is supplied with the 7133.
Step 4. Unscrew the thumbscrews
1
,
2
,
3
, or
4
on the card, or cards, that
you are going to remove.
Step 5. Attention: The four bypass cards might not all have the same jumper
settings. It is important, therefore, that they, or their replacement cards, be
installed into the correct positions.
If you are removing more than one bypass card, make a note of the positions
of those cards before you remove them. Attach labels if necessary.
Step 6. Pull out the card, or cards.
Step 7. If you are now going to install a new bypass card, or change the jumper
settings on the card that you have just removed, go to step 8. Otherwise, go
to step 14 on page 203.
Step 8. Refer to 113.
Step 9. Lay the card down with its electronic components upward and its SSA
connectors
1
to your right.
Step 10. Note that in Figure 113, the jumpers are set for Automatic mode. That is, the
jumpers
2
connect pins 2 and 3.
Note: The default setting of all new bypass cards is for Automatic mode.
In Figure 114 on page 203, the jumpers are set for Forced Inline mode. That
is, the jumpers
2
connect pins 1 and 2.
Note: When a bypass card is jumpered for Forced Inline mode, its mode
light shows green when power is present at the card.
1
2 3
1
2 3
1
1
2
2
Figure 113. Jumpers Set for Automatic Mode
202
7133 Models D40 and T40 Service Guide
Содержание 7133 D40
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