Removal and Replacement Procedures
VCO/4K Power Subsystem 1-13
6.0 REMOVAL AND REPLACEMENT PROCEDURES
Follow ESD rules when removing or replacing a system component. Use a wrist strap
connected to the system for grounding. Refer to Figure 1.
WARNING: Voltages present on the power backplane and at other
test points produce severe, perhaps fatal electrical shock. Observe
all precautions normally associated with the testing of electrical
equipment.
Turn off power at the source before performing any service.
6.1 To Remove a Power Supply Module
Note: Follow ESD rules when removing a system component. Use a wrist strap for
grounding.
To remove a nonredundant power supply module:
1.
Turn the switch off on the power entry module if the system does not contain
redundant power supply modules, or if both power supply modules are to be removed
simultaneously. The power disconnect switch is located in the rear of the system on the
power entry module (see Figure 3).
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.
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.
5.
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.
