Quidway AR 28 Series Routers Installation Manual Chapter 6 Router Maintenance
Huawei Technologies Proprietary
6-15
(1)
(2)
(3)
1) Chassis cover 2) Chassis bottom 3) Fastening screw
Figure 6-6 Open the chassis cover
Caution:
z On a mounting screw of your router chassis, there is an anti-dismantle seal of
Huawei Technologies. 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.
z Do not replace the hardware unless necessary and under the guidance of technical
staff.
z Ensure that no electricity is present before servicing the device to avoid bodily
injuries and device damage.
z Wear an ESD-preventive wrist strap when servicing the device, making sure it has
good skin-contact.
z Use the SDRAMs provided by Huawei Technologies only. Otherwise, anomalies
might occur to the device.
6.2.3 Replacing the SDRAM
The storage media available with the router include:
z SDRAM: where the host program is running.
z Flash memory: stores the application and configuration files.
z Boot ROM: stores the Boot ROM program.
Hardware maintenance mainly involves SDRAM.
Follow this procedure to replace the SDRAM:
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