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Replacing the Cisco 3660 Router Backplane 7
Detaching Components from the Backplane
Use the following procedure to remove a power supply:
Step 1 Turn OFF power to the installed power supplies and unplug the power cables.
Note Always unplug the power cable before loosening the captive screws. If the power
cable is still plugged in, it prevents the captive screws from being loosened adequately to
remove the power supply.
Step 2 Loosen the two captive screws holding each power supply in the chassis bay, using the
Phillips screwdriver. (See Figure 1.)
Step 3 Slide each power supply out of its bay.
Figure 1 Removing and Replacing a Cisco 3660 Router Power Supply
Detaching the Mainboard
Warning Before performing any of the following procedures, ensure that power is removed from
the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that
services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of
the circuit breaker in the OFF position.
E
T
H
0
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3
ET
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NE
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H
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ACT
LINK
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N
HIGH SPEED SERIAL
1HSSI
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TD
TC
RD
RC
LB/CN
CN/LP
RXC
SERIAL 3
SERIAL 2
SERIAL 1
SERIAL 0
RXD
TXCTXD
CN/LP
RXC
RXD
TXC
TXD
CN/LP
RXC
RXD
TXCTXD
CN/LP
RXC
RXD
TXC
TXD
EN
SERIAL
4T
S
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M
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L
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R
E
IN
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IO
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V
IC
F
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S
IN USE
IN USE
1
0
17348
Center hole
PS2 (bay 2)
PS1 (bay 1)
Power supply
Power
supply LED