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3745 FRU Exchange Procedure
PS2 and Primary Power Box 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 door and the rear door.
4. Switch CB1 OFF. Refer to Figure 4-94.
5. Set OFF the Customer power supply
switch related to the 3745. Install the
appropriate safety panel which indicates
that the supply should not be turned ON
6. Locate the PS2 and the primary power box.
Refer to Figure 4-94.
7. Refer to Figure 4-95 and to Figure 4-96 on
page 4-70 .
8. Disconnect the main power cable from outlet
J3.
9. Release the ground wire 1 from the frame.
10. At the front and rear sides of the primary
power box, verify that the cables are labeled
according to their positions. If they are not,
label them. Then remove all the cables.
11. Remove the four screws 2 which secure the
primary power box to the frame.
12. Slide the primary power box out and place it
in a safe working area.
13. Remove the six screws 3 which secure the
PSs covers 4.
14. Remove the PSs covers 4.
15. Remove the two screws 5 which secure the
DC/DC converter cover 6.
16. Remove the DC/DC converter cover 6.
Figure 4-94. Primary Power Box, Power Supply 2, and
CB1 Locations
Chapter 4. 3745 FRU Exchange 4-69