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3745 FRU Exchange Procedure
3745 FRU Exchange Procedures
Card Exchange Procedure
1. Inform the customer that the 3745 is to be
powered OFF.
2. Press Power Off on the control panel.
3. Open the front door.
4. Switch CB1 OFF. Refer to Figure 4-40.
Figure 4-40. CB1 Location.
5. Check for the physical location.
a. For the physical board location, refer to
Figure 4-1 on page 4-3
b. For the physical card location:
On the Basic board refer to Figure 4-4
on page 4-6, Figure 4-5 on page 4-7,
or Figure 4-6 on page 4-8 or
Figure 4-7 on page 4-9.
On the MOSS board, refer to
Figure 4-9 on page 4-11.
6. Remove the following covers, (refer to
Figure 4-41 on page 4-35): Cover 1 for the
basic board (loosen the 2 screws 2 and lift
up the cover), and covers 3 for the MOSS
board (remove the 7 screws 4).
7. Attention: Use the ESD kit and procedures.
8. If the card to be replaced is a CADR, go to
Step 24 on page 4-36.
9. If the card to be replaced is an MLA, go to
Step 33 on page 4-37.
10. Remove the crossover connectors (if installed)
from the card exchanged.
11. Remove the line cable(s), if any (cards FESH,
TIC2, or EAC).
12. If the card to be exchanged is on the MOSS
board, remove the shipping springs that
secure the extractor levers by sqeezing them
together. Refer to Figure 4-42 on page 4-35.
13. If the card to be exchanged is a CAL or a
STO, ensure that the new card is identical
with the previous one (for STO there are two
types of cards: STO4 for 4MB and STO8 for
8MB. For CAL there are two types of cards:
CAL6 for CADS feature and CAL7 for BCCA
feature).
14. Exchange the card, re-install the crossover
connectors (if installed) and re-install the ship-
ping springs (if you have exchanged a card
on the MOSS board).
15. Replace the board covers.
16. Switch CB1 ON.
17. Close the front door.
18. If the replaced card is the PCC, go to step 21.
19. Power the 3745 ON.
20. 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.
PCC Replacement
21. From Step 18: Power the 3745 ON. Ignore
the BERs that are logged, (they are due to the
time-of-day clock not being set).
22. Set the time-of-day clock. Refer to the
IBM
3745 Communication Controller Service
Function
, SY33-2069.
23. 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.
4-34 3745 Models 130 to 17A: MIP