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214 Chapter 9 Replace or Upgrade a Power Supply
P0993133 03
If you are replacing a faulty power supply module, the Business Communications Manager is
already in operation. The power supply module powers-up when fully and correctly inserted in
the redundant power supply cage.
5 Verify the LEDs on the power supply module are lit. Verify all LEDs on the base function tray
indicate the system functions correctly.
6 This procedure is complete.
Remove a power supply module
Use this procedure for any of the following conditions:
• Remove a single failed power supply module. A power supply module indicates a failure when
the green LED (located on the module) is not lit.
• Remove power supply modules before you install a new power supply cage in the BCM400
platform base chassis (see “Upgrade to a redundant power supply” on page 203).
1 Unfasten the power supply module locking nut. When the nut is fully unfastened, the nut
should move freely in the screw cage.
2 Swing the power supply module handle to a 90 degree angle to the power supply module.
3 Grasp the power supply module handle. With your thumb, compress the locking tab toward the
handle.
4 Pull the power supply module out of the power supply cage (see notes in this step).
Note: If you are replacing a faulty power supply module, power-down the power supply
module. Partially remove the power supply module from the power supply cage. Do not
completely remove the power supply module. IMPORTANT: When the power is on, wait
several seconds before removing the power supply module completely from the power supply
cage to ensure complete electrical discharge.
Note: It is not necessary to remove power from the BCM400 platform base or expansion
unit to replace a single power supply module.
Warning: Protect the hardware components against damage from electrostatic discharge.
Always wear a ground wrist strap before you handle components. Always place the
components in static-free container.
Warning: Risk of shock.
Hazardous voltage levels are maintained for several seconds on removable modules. Do
not completely remove the module from the power supply cage for several seconds after
disengaging the module from the power supply cage.