Product guide

Chapter 5: Technician Maintenance QSSC-S4R Server System Product Guide
Version 1.0
120
Replacing the Power Distribution Board
The power distribution board provides the output power interface between the hot swap power supplies and the
main board.
Removing the Power Distribution Board
1. Remove the power supplies. For instructions, see “Hot Swapping a Power Supply” on page 56. Follow steps
2 through 4 only.
2. Remove the top cover. For instructions, see “Removing the Top Cover” on page 82.
3. Remove all memory dividers and memory risers, see Removing the Memory Dividers on page 95 and
Removing a Memory Riser on page 64.
4. Remove the chassis mid-brace, see Removing the Chassis Mid-Brace on page 98.
5. Remove the memory rug, see Removing the Memory Rug on page 105.
6. Remove the main board. For instructions, see “Removing the Main Board” on page 107.
7. Disconnect all cables from the power distribution board, see “1” in the following figure.
8. Disconnect all cables from the hot swap backplane, see “1” in the following figure.
9. Remove the three screws on the power distribution board, see “2” in the following figure.
10. Lift the board from the chassis, see “3” in the following figure.
Figure 126. Removing the Power Distribution Board
Installing the Power Distribution Board
1. Set the power distribution board in place.
2. Use the three screws to secure the power distribution board to the chassis.
3. Connect the cables between the power distribution board and the system boards.