Cisco 3660 - Manual (Page 6)

6 Replacing the Mainboard in Cisco 3660 Routers
Removing the Cisco 3660 Mainboard Tray
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact
with telephone-network voltages.
Step 2 Remove all network interface cables from the rear panel of the mainboard tray.
Step 3 Place the router so that the rear panel is facing you.
Locate the two sets of screws on the mainboard rear panel: one set of captive screws and
one set of Torx screws. (See Figure 1.)
Caution Do not remove or loosen the Torx screws.
Step 4 Loosen the two captive screws located in the upper corners. (See part 1 in Figure 1.)
Step 5 Swing the two tray levers out, and slide the mainboard tray out of the chassis. (See parts
2 and 3 in Figure 1.)
Figure 1 Removing the Cisco 3660 Mainboard Tray
VCC OK SYSTEM FDX LINK 100Mbps FDX
1 0
LINK
100Mbps
ETH 0 ETH 3
ETHERNET 4E
ETH 2 ETH 1
1 2 3
ACT
LINK 0
CN/LP RXC
SERIAL 3 SERIAL 2 SERIAL 1 SERIAL 0
RXD TXC TXD CN/LP RXC RXD TXC TXD CN/LP RXC RXD TXC TXD CN/LP RXC RXD TXC TXD
EN
SERIAL
4T
VOICE
2V
V0
V1
EN
HIGH SPEED SERIAL
1HSSI
H
TD TC RD RC LB/CN
SEE MANUAL BEFORE INSTALLATION
VIC
FXS IN USE IN USE
1 0
17335
Tray levers
1
2 2
3