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3745 FRU Exchange Procedure
CADR Exchange
24. From step 8 on page 4-34: At the Channel
Tailgate set the Select Out Bypass switch to
bypass (refer to Figure 4-27 on page 4-25, to
Figure 4-43, and to Figure 4-44) according to
the CADR to be replaced (refer to
Table 4-10).
25. Remove the crossover connectors from the
card to be exchanged.
26. Exchange the card and re-install the crossover
connectors.
27. Replace the board cover.
28. Set the Select Out Bypass switch to normal
29. Switch CB1 ON.
30. Close the front door.
31. Power the 3745 ON.
32. Referring to Chapter 3, “How to Run 3745
Diagnostics” on page 3-1, run the same diag-
nostic in ODG that you ran before you
exchanged the FRU. Go to “Action to Take
After a Diagnostic Run or an FRU Exchange”
on page 4-99.
Channel
Tail Gat e
Rear
Figure 4-43. Channel Tailgate Location
Table 4-10. Select Out Switches According to
CADR Cards
Select Out Switch CADR Card
01P-4 01G-A1B
01P-3 01G-A1D
01P-2 01G-A1F
01P-1 01G-A1H
Tag
Bus
Select out
Bypass Switch
Bypass
Normal
Figure 4-44. Select Out Switch
4-36 3745 Models 130 to 17A: MIP