3Com Router 5000 Family
Installation Guide
Chapter 6 Router Maintenance
3Com Corporation
6-12
Caution:
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On a mounting screw of your router chassis, there is an anti-dismantle seal of 3Com
Corporation. You must keep it in good condition when asking your sales agent for
servicing. You can open the chassis yourself but with permission of your sales agent
and must operate following the related rules. The company is not liable for any
damage or consequence resulted from users' operation without permission.
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Do not replace the hardware unless necessary and under the guidance of technical
staff.
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Ensure that no electricity is present before servicing the device to avoid bodily
injuries and device damage.
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Wear an ESD-preventive wrist strap when servicing the device, making sure it has
good skin-contact.
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Use the SDRAMs provided by 3Com Corporation only. Otherwise, anomalies might
occur to the device.
6.2.3 Replacing the SDRAM
The storage media available with the router include:
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SDRAM: where the host program is running.
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Flash memory: stores the application and configuration files.
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Boot ROM: stores the Boot ROM program.
Hardware maintenance mainly involves SDRAM.
Follow this procedure to replace the SDRAM:
