IBM ibm Basic Board Exchange Procedure

3745 FRU Exchange Procedure
Basic Board Exchange Procedure
Removal 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 and rear door.
4. Switch CB1 OFF. Refer to Figure 4-103.
5. Locate the board. Refer to Figure 4-103.
6. Refer to Figure 4-104 on page 4-78 .
7. Remove the basic board cover .1/ (loosen the
two screws .2/ and lift up the cover).
8. remove the 2 MOSS board covers .3/ (seven
screws must be removed .4/).
9. Remove the basic board grid (four screws
must be removed). Refer to Figure 4-105 on
page 4-78.
10. At the channel tailgate, set all the select out
switches to bypass (if any channel adapter is
installed).
11. At the PS1 remove the cover of the four FDS
cables (two screws must be removed). Dis-
connect these four cables and the multivoltage
cable going to the basic board. Refer to
Figure 4-106 on page 4-78.
Figure 4-103. Basic Board, MOSS Board, and CB1
Locations
Chapter 4. 3745 FRU Exchange 4-77