To Remove A Redundant Power Supply Module; To Replace A Power Supply Module - Cisco VCO/4K Mechanical Assemblies

Removal and Replacement Procedures

To remove a redundant power supply module:

1. Remove the front door of the VCO/4K system to access the power supply module.
2. Connect your wrist strap to the system (upper right corner). Refer to Figure 1.
3. Remove the two mounting screws on the front panel of the power supply module.
When the upper left screw is removed, the power is cut off from the module (the power
LED is off).
Note: If the LED is faintly illuminated red, and the interlock switch screw is removed,
it is safe to remove the power module.
4. Grasp the black hand grip on the front of the module with one hand and pull the
module out. Use your other hand to provide support underneath the module as you
remove it from the system.

6.2 To Replace a Power Supply Module

Note: Follow ESD rules when removing a system component. Use a wrist strap for
grounding.
1. If the power supply module is nonredundant, ensure that the power is off.
2. Remove the front door of the VCO/4K system to access the power supply module.
3. Connect your wrist strap to the system (upper right corner). Refer to Figure 1.
4. Grasp the black hand grip on the front of the module with one hand and use your other
hand to provide support underneath the module as you push it into its compartment.
5. Fasten the two mounting screws on the front panel of the power supply module.
Ensure that you rotate the plate into position to align the left mounting screw before
fastening the screw into place.
6. If necessary, turn the VCO/4K system on.
7. Remove your wrist strap.
8. Check the power LED and ensure that the power supply module is operating. Refer to
Section 3.2 for information on the LED.
9. Replace the front door. The front door must remain on during system operation
for EMI compliance.
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