Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 143

Chapter 5 Removal and Replacement Procedures
Grasp both power supply handles, as shown in
Step 7
of the chassis.
Figure 5-15
Figure 5-16
Removing PWR-1900-DC Power Supply from a Cisco 7606 Router
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Voltage is present on the backplane when the system is operating. To reduce risk of an electric shock,
Warning
keep hands and fingers out of the power supply bays and backplane areas.
Follow these steps to remove a DC-input power supply:
Step 1 Verify that power is off to the DC circuit connected to the DC PEM for the power supply you are
removing
and Cisco 7606 routers.
OL-4503-26
Handling a DC-Input Power Supply
Power Supply 2
(redundant)
P W R -2
7 0 0 -D C
/4
P W R -2
7 0 0 -D C
/4
+V E- 1
INP UT
1 INP UT
2
+V E- 1 OK
OK
48V -60
-V E- 1 V
48V -60
=40 A V
=40 A
-V E- 1
+V E- 2
+V E- 2
-V E- 2
-V E- 2
AL L FA
ST EN ER
PR IOR S MU ST
TO OP
ER AT ING BE FU
LLY EN
TH E PO GA GE
WE R SU D
PP LY
Power Supply 1
If the power supply bay is to remain empty, install a blank power supply filler plate
(Cisco part number 700-03104-01) over the opening, and secure it with the captive
installation screws
(Figure 5-17). The location of the PEMs is the same for AC and DC PEMs on the Cisco 7603
Figure 5-15, and slide the power supply completely out
+V E- 1
INP UT
+V E- 1 1
INP UT
OK 2 FA N
-V E- 1
OK OU TP UT
48V -60 OK
V 48V -60
FA IL
=40 A V
=40 A
-V E- 1
+V E- 2
+V E- 2
-V E- 2
-V E- 2
AL L FA
ST EN ER
PR IOR S MU ST
TO OP BE FU
ER AT ING LLY EN
TH E PO GA GE
D
WE R SU
PP LY
FA N
OU TP UT
OK
FA IL
Cisco 7600 Series Router Installation Guide
Removing and Replacing the Power Supply
5-15