Dell PowerEdge 1750 - Manual (Page 35)

5. Remove the cooling fan that is located behind the control panel. See " Removing a Fan ."
The fan power cable attaches to the control panel flex cable assembly.
6. Loosen the thumbscrew that secures the flex cable assembly to the control panel board (PLANAR), and lift the flex cable assembly up out of its
connector. See Figure 4 -17 .
7. Remove the hex-head Phillips screw that secures the control panel board to the chassis. See Figure 4 -17 .
8. Slide the control panel board back and lift it from the system.
Installing a Control Panel
1. Insert the control panel board into the chassis and slide it forward into place.
2. Insert and tighten the hex-head Phillips screw that secures the control panel board to the chassis.
3. Insert the flex-cable assembly into its connector on the control panel board and tighten the thumbscrew.
4. Replace the cooling fan and connect the fan power cable to the power connector on the flex-cable assembly.
5. Close the system covers. See " Closing the System Covers ."
6. Reconnect the system and peripherals to their power sources, and turn them on.
7. Replace the optional front bezel, if applicable. See " Replacing the Bezel ."
Removing and Replacing Power Supplies
Removing a Power Supply
1. Remove the optional front bezel, if present. See " Removing the Bezel ."
2. Open the system covers. See " Opening the System Covers ."
3. Identify the failed supply using the red fault indicator on the top of the supply. See Figure 3 -5 .
4. Disconnect the AC cord for the power supply. To identify the correct power connector, see Figure 3 -4 .
5. Grasp the power supply handle and slide the power supply away from the power distribution board approximately 0.75 inch (2 cm), and then lift the
power supply out of the chassis. See Figure 4 -18 .
Figure 4-18. Removing a Power Supply
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See
your System Information Guide for complete information about safety precautions, working inside the system, and protecting against
electrostatic discharge.
CAUTION: The connectors on the PDB contain high voltage. Do not remove the metal cover from the PDB or touch the connectors on the PDB or
power supply.
NOTE: The power supplies are hot-pluggable. Remove and replace only one power supply at a time.
CAUTION: Disconnect the AC cord for the failed power supply before removing the power supply.