-48 Volt dc Power Supply Exchange
Note
When replacing a power supply, you must leave enough supplies running at all times to satisfy the
requirements of installed modules. If removal of a defective, but still functioning, power supply will not
cause a power deficit in the 8265, you can remove the faulty supply without losing power to a module
or modules. Before attempting to remove a power supply from the chassis, enter the
show power
budget command to display current power conditions for the 8265.
Follow these steps when removing the -48 Volt dc power supply without disconnecting the power cord.
Caution
Only trained electrical service personnel must make disconnections to the -48 Volt dc power source.
1
If installed, remove the power supply bay grille to gain access to the power supply bay (see
Figure 4-2 on page 4-4).
2
Set the defective power supply's ON/STANDBY switch to the STANDBY position.
3
Turn off the power source circuit breaker, protecting the power supply you want to remove.
4
Unplug and remove the keyed cable connector from the power supply socket.
5
Loosen the spring-loaded screws on the power supply faceplate.
6
Carefully pull out the power supply from the slot of the chassis.
7
Remove the replacement power supply from its shipping box and set the power supply's
ON/STANDBY switch to the STANDBY position.
8
Plug the keyed-connector into the power supply socket.
9
Carefully slide the power supply into the selected power supply slot (the same slot from which the
defective supply was removed, or any other available power supply slot).
Caution
Be sure to use the same power type (dc) as the removed power supply. Do not mix ac and dc
power supplies.
10
Hand-tighten the spring-loaded screws that secure the power supply to the front of the switch.
11
Set the power supply's ON/STANDBY switch to the ON position. The replacement power supply is
now fully operational.
12
Optionally, install the power supply bay grille:
a. Grasp both ends of the grille and place the two bottom tabs into the notches at the base of the
power supply bay.
b. Flex the grille so the tab on each end of the grille can be fitted into the corresponding notches
on the power supply bay.
Chapter 4. FRU Exchange
4-5
Summary of Contents for 8265 Nways ATM Switch
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Page 11: ...Tables 3 1 Wraps available on WAN Modules 3 9 Copyright IBM Corp 1998 ix...
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