Cisco Systems NPE-225, NPE-175 manual Checking a Sdram Upgrade or Replacement

Chapter 9 Removing and Installing the NPE or NSE

Removing and Replacing the NPE or NSE

Caution SODIMMs are sensitive components that are susceptible to ESD damage. Handle SODIMMs by the edges only; avoid touching the memory modules, pins, or traces (the metal fingers along the connector edge of the SODIMM). (See Figure 9-15.)

Figure 9-15 Handling a SODIMM

1. Press power switch to standby ().

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4. Connect ground
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and power cord	to power supply.

plug to electrical outlet.

Follow these steps to install the new SODIMM:

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5.Press power switch to on ( ).

2.Connect power supply cable.

Step 1 Remove a new SODIMM from the antistatic container.

Step 2 Hold the SODIMM component-side-up, with the connector edge (the metal fingers) away from you.

Step 3 Tilt the SODIMM to approximately the same angle as the socket, and insert the connector edge into the socket.

Caution When inserting the SODIMM, use firm but not excessive pressure. If you damage a socket, you will have to return the NPE-400 to the factory for repair.

Step 4 Gently press on the SODIMM until the SODIMM spring latches snap into place.

Step 5 If the SODIMM appears misaligned, carefully remove it and reseat it in the socket. Push the SODIMM gently back into the socket until the spring latches snap into place.

This completes the SDRAM SODIMM replacement procedure. To reinstall the NPE-400 in the chassis, see the “Installing the NPE or NSE” section on page 9-21.

Checking a SDRAM Upgrade or Replacement

If, after a SDRAM upgrade or replacement, the system fails to boot properly, or if the console terminal displays a checksum or memory error, ensure that the SIMM, DIMM, or SODIMM is installed correctly. If necessary, shut down the system and remove the network processing engine or network services engine. Check the SIMM, DIMM, or SODIMM by looking straight down it and then at eye level. The

Network Processing Engine and Network Services Engine Installation and Configuration

9-20 OL-4448-12