Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 174

Removing and Replacing the Power Supply
Figure 5-51
Power supply captive installation screws must be tight to ensure protective grounding continuity.
Warning
In a system with dual power supplies, connect each power supply to a separate input line. In case of a
Caution
line failure, the second source will most likely still be available.
Step 5 Verify that all connections to the DC PEM are secure.
Remove the tape from the circuit breaker switch handle, and restore power by moving the circuit breaker
Step 6
switch handle to the On (|) position.
Step 7 Verify power supply operation by checking that the power supply front panel LEDs are in the following
states:
•
•
•
If the LEDs indicate a power problem, see the
Installing a PWR-2700-DC/4 Power Supply in a Cisco 7604 Router
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Follow these steps to install a DC-input power supply:
Step 1 Power supply ground is required.
Note
Cisco 7600 Series Router Installation Guide
5-46
Power Supply Captive Installation Screws
P W R - 1
5 0 0 - D C
A LL FA
S TE N E
P R IO R R S M U
S T B E
TO O P E
FU LL Y
R AT IN G
E N G AG
O F P O W
E D \
E R S U P
P Y
Captive installation screws
INPUT OK LED is green
FAN OK LED is green
OUTPUT FAIL LED is not lit
The system ground connection with the PWR-2700-DC/4 power supply in a Cisco 7604 router
is provided by the PWR-2700-DC/4 power supply ground. Additionally, you can connect a
system (earth) ground.
Chapter 5 Removal and Replacement Procedures
Status LEDs
"Identifying Startup Problems" section on page 4-2.
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