Sun Oracle Fire X4440, Service Manual

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Chapter 5 Servicing Infrastructure Boards and Components 5-15
b. Slide the power supply out of the system.
See Section 3.6.3, “Removing a Power Supply” on page 3-18 .
3. Disconnect the top cover interlock cable from the power distribution board.
(
FIGURE 5-8
[1])
4. Disconnect the PDB ribbon cable from the power supply backplane.
5. Remove the four screws securing the L shaped bus bars from the PSU
backplane to the PDB.
6. Remove the No. 2 Phillips screw securing the PDB to the chassis. [2]
7. Grasp the bus bar and pull the PDB/bus bar assembly to the left, away from the
Paddle card.
8. Lift the PDB/bus bar assembly up and out of the system.
9. Place the PDB/bus bar assembly on an antistatic mat.
FIGURE 5-8
Removing the Power Distribution Board
5.5.2 Installing the Power Distribution Board
1. Install the old bus bar onto the new PDB module.
Do not tighten the screws at this time. All 8 bus bar screws are tightened only after
the motherboard is installed. The 4 motherboard to bus bar screws are loosely
installed initially.