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3745 FRU Exchange Procedure
13. Attention: Use the ESD kit and procedures.
Remove the LICs and the DMUX by unfas-
tening the thumb screws holding them to the
board. (See “LIC Exchange Procedure” on
page 4-44 and “DMUX Exchange Procedure”
on page 4-39 for more details about
removals).
14. Refer to Figure 4-117 on page 4-86,
Figure 4-118 .
15. Disconnect the power cable 2 from the LIC
board.
16. Remove the four screws 3 holding the board
assembly on the frame.
17. Remove the LIC board assembly.
18. Note the board address for later use.
Figure 4-118. LIC Board Assembly
Installation Procedure
1. Refer to Figure 4-117 on page 4-86 and set
the same board address as you noted during
the board removal.
2. Refer to Figure 4-118. Mount the new LIC
board assembly in place and secure it with the
four screws 3.
3. Refer to Figure 4-117 on page 4-86. Recon-
nect the flat power cable 2.
4. Attention: Use the ESD kit and procedures.
Install the LICs and DMUX into their proper
positions and fasten the thumb screws holding
them to the board. Finger strength is enough.
Do not use tools.
5. Install the LIC cables in the LICs.
6. Install the serial link cables on the DMUX.
7. Refer to Figure 4-116 on page 4-85. Install
the DMUX cover with two screws 1.
8. Close the rear door.
9. Switch CB1 ON.
10. Close the front door.
11. Press Power On on the control panel.
12. Run all diagnostics.
13. Go to “Action to Take After a Diagnostic Run
or an FRU Exchange” on page 4-99.
Chapter 4. 3745 FRU Exchange 4-87