Installation guide

18
Upgrading System Memory in Cisco 3600 Series Routers
78-3636-05
Replacing DRAM and SDRAM
Figure 4 Removing the Cisco 3660 Mainboard Tray
Caution The mainboard is an ESD-sensitive component. To avoid damage, observe all ESD precautions.
Step 7 When you are ready to replace the mainboard tray, see the “Replacing the Mainboard Tray
(Cisco 3660)” section on page 35.
Replacing DRAM and SDRAM
DRAM SIMMs (Cisco 3620 and Cisco 3640 Routers)
DRAM SIMM Location and Orientation
Figure 5 or Figure 6 shows the DRAM SIMM locations in your router.
VCC OK
SYSTEM
FDX
LINK
100Mbps
FDX
1
0
LINK
100Mbps
ETH 0
ETH 3
ETHERNET
4E
ETH 2 ETH 1
123
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
HS
TD
TC
RD
RC
LB/CN
SEE MANUAL BEFORE INSTALLATION
VIC
FXS
IN USE
IN USE
1
0
17335
Tray levers
1
22
3