Cisco 3845 Hardware Guide - Page 116

DIMM Location and Orientation, Removing an SDRAM DIMM

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SDRAM DIMM Removal and Installation DIMM Location and Orientation The two SDRAM DIMM connectors are located on the motherboard and are identified as MEMORY 0 and MEMORY 1 on the Cisco 3825 router, and as MEM0 and MEM1 on the Cisco 3845 router. See Figure 51 and Figure 52 for DIMM locations. DRAM DIMMs have a polarization notch on the mating edge to prevent incorrect insertion. Figure 53 shows the polarization notch on a DRAM DIMM. Figure 53 DRAM DIMM Polarization Notch 103362 Polarization notch Removing an SDRAM DIMM To remove an SDRAM DIMM from the motherboard, follow these steps: Step 1 Pull the latches away from the DIMM at both ends. This lifts the DIMM slightly. Lift the DIMM completely out of the connector. See Figure 54. Figure 54 Removing a DRAM DIMM 2 1 1 121392 1 Release the latches 2 Remove the DIMM Installing and Upgrading Internal Components in Cisco 3800 Series Routers 86 OL-5975-04

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86
Installing and Upgrading Internal Components in Cisco 3800 Series Routers
OL-5975-04
SDRAM DIMM Removal and Installation
DIMM Location and Orientation
The two SDRAM DIMM connectors are located on the motherboard and are identified as MEMORY 0
and MEMORY 1 on the Cisco 3825 router, and as MEM0 and MEM1 on the Cisco 3845 router. See
Figure 51
and
Figure 52
for DIMM locations.
DRAM DIMMs have a polarization notch on the mating edge to prevent incorrect insertion.
Figure 53
shows the polarization notch on a DRAM DIMM.
Figure 53
DRAM DIMM Polarization Notch
Removing an SDRAM DIMM
To remove an SDRAM DIMM from the motherboard, follow these steps:
Step 1
Pull the latches away from the DIMM at both ends. This lifts the DIMM slightly. Lift the DIMM
completely out of the connector. See
Figure 54
.
Figure 54
Removing a DRAM DIMM
Polarization notch
103362
1
Release the latches
2
Remove the DIMM
121392
1
1
2