IBM 3745 130, Maintenance Information Procedures

Page: 265 / 361

3745 FRU Exchange Procedure
DMUX Exchange Procedure
Since the DMUX is hot-pluggable, there is no
need to power OFF.
Removal Procedure
1. Open the rear door.
2. For the board location refer to Figure 4-46.
3. Remove the related DMUX cover (refer to
Figure 4-47). Two screws must be removed
.1/
. (Two types of DMUX cover exist
according to the board location.)
4. For the DMUX location, refer to Figure 4-48
on page 4-40. The thumb screw color of the
DMUX is white.
5. Refer to Figure 4-49 on page 4-40. Note the
DMUX cables locations then remove them.
6. Unfasten the thumb screw holding the DMUX
cassette to the board.
7. Remove the DMUX cassette.
Figure 4-46. Location of the LIC Boards
Figure 4-47. DMUX Cover
Chapter 4. 3745 FRU Exchange
4-39