Specifications

32 Memory Replacement Instructions for the Network Processing Engine and Input/Output Controller
Removing and Replacing Memory DRAM SIMMs, SDRAM DIMMs, and Boot ROMs
To install memory SIMMs in the I/O controller and the network processing engine, complete the
following steps:
Step 1 With the I/O controller or the network processing engine in the same orientation as the
previous procedure (with the handle away from you and the edge connector toward you),
you will install the first SIMM in the socket farthest from you. Then you will install the
last SIMM in the socket closest to you.
Step 2 Remove a new SIMM from the antistatic bag.
Note To prevent DRAM errors in the NPE-100, NPE-150, or NPE-200, and to ensure
your system initializes correctly at startup, DRAM bank 0 (socket U18 and U25, or U11
and U25) must contain no fewer than two SIMMs of the same type. You may also install
two SIMMs of the same type in bank 1 (socket U4 and U12, or U42 and U52); however,
bank 0 must always contain the two largest SIMMs.
Step 3 Orient the SIMM so its connector edge (the metal fingers) is down and the component
side is facing you. (See Figure 22.)
Figure 22 Cisco 7200 Series Main Memory SIMM
Step 4
Hold the sides of the SIMM between your thumb and middle finger, with your forefinger
against the far edge, opposite the connector edge. (See Figure 11.)
Step 5 Tilt the SIMM to approximately the same angle as the socket and insert the entire
connector edge into the socket.
Caution When inserting SIMMs, use firm but not excessive pressure. If you damage a socket, you
must return the I/O controller or the network processing engine to the factory for repair.
Step 6 Gently push the SIMM into the socket until the spring clips snap over the ends of the
SIMM. If necessary, rock the SIMM gently back and forth to seat it properly.
Step 7 Repeat Step 2 through Step 6 for the remaining SIMMs.
Step 8 When all SIMMs are installed, check all alignment holes (two on each SIMM) and ensure
that the spring retainer is visible. If it is not, the SIMM is not seated properly. If any
SIMM appears misaligned, carefully remove it and reseat it in the socket. Push the SIMM
firmly back into the socket until the retainer springs snap into place.
This completes the SIMM replacement procedure. If you plan to replace the boot ROM, proceed to
the “Removing Boot ROMs” section on page 36. If you do not plan to replace the boot ROM,
proceed to the “Replacing the Input/Output Controller” section on page 40.
Alignment holes
Connector edge
Polarization notch
H2407