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3745 FRU Exchange Procedure
Installation Procedure
1. Check that the new FDD has a jumper in posi-
tion 0 (refer to Figure 4-74).
Figure 4-74. FDD Connectors
2. Install the new FDD assembly with the four
screws 5. Refer to Figure 4-73 on
page 4-54.
3. Reconnect the two cables at the back of the
FDD 4. Refer to Figure 4-73 on page 4-54.
4. Re-install the covers of the MOSS board 1
with the seven screws 2. Refer to
Figure 4-72 on page 4-54.
Note: In the remaining steps, it is assumed
that the microcode is at the same level on
both the diskette and the hard disk.
5. Re-apply power as follows:
a. If you powered OFF the machine, go to
Step 12.
b. If you did not power OFF the machine,
then go to Step 6.
6. Install the primary diskette in the FDD.
7. Press Function on the control panel until 9
(Load from Diskette) is displayed in the func-
tion window.
8. Press Validate.
Note: This action will also run MOSS diag-
nostics and complete a MOSS IML. A suc-
cessful completion will result in a code F0E,
F0F, or 000. If any other code is displayed,
an error was detected. See “3745 Control
Panel Codes” on page 1-15
9. Remove the primary diskette from the FDD.
10. Close the front door.
11. Referring to Chapter 3, “How to Run 3745
Diagnostics” on page 3-1, run the same diag-
nostic that you ran before you exchanged the
FRU. Go to “Action to Take After a Diag-
nostic Run or an FRU Exchange” on
page 4-99.
12. Install the primary diskette in the FDD.
13. Switch CB1 ON.
14. Power the 3745 ON with function 9 (Load
from Diskette).
15. A successful completion will result in a code
F0E, F0F, or 000. If any other code is dis-
played, an error was detected. See “3745
Control Panel Codes” on page 1-15
16. Remove the primary diskette from the FDD.
17. Close the front door.
18. Referring to Chapter 3, “How to Run 3745
Diagnostics” on page 3-1, run the same diag-
nostic that you ran before you exchanged the
FRU. Go to “Action to Take After a Diag-
nostic Run or an FRU Exchange” on
page 4-99.
Chapter 4. 3745 FRU Exchange 4-55