Huawei USG9500 Series, Hardware Manual, Page: 369 / 514

Step 2 Check whether there is any bent pin in the connector of the new SPU.
Step 3 Power off the SPU to be replaced.
NOTE
l Before replacing an SPU, you must power it off. If you remove an SPU while it is running and then
insert a new one, the SPU and its SPC may not work properly.
l After powering off the SPU, the number of CPUs in the device changes. In this case, sessions
reselect CPUs based on the hash algorithm. If the selected CPU is different from the previous one,
the session will be interrupted, and the service will re-initiate a connection.
Use either of the following methods:
l Press and hold the OFL button on the panel of the SPU for six seconds until the OFL
indicator turns on.
l
In the user view, run the power off slot slot-id command.
Step 4 Pull out the SPU.
1.
Put on the ESD wrist strap and connect the ground terminal to the ESD jack on the
chassis.
2. Using the Phillips screwdriver turn the two captive screws counter-clockwise to loosen
them, as shown in
Figure 3-11 (1).
3. Turn the ejector levers on the panel of the SPU outward and upward. When the ejector
levers and the panel form a 45-degree angle, the SPU is removed from the backplane, as
shown in
Figure 3-11 (2).
4. Holding the captive screws, pull out the SPU, as shown in Figure 3-11 (3).
NOTICE
– Pull out the SPU slowly and smoothly to prevent it from hitting neighboring boards
and affecting running boards.
– When removing an SPU, do not touch any parts on the SPU to avoid damaging it.
HUAWEI USG9500 Series
Hardware Guide
3 Hardware Maintenance
Issue 03 (2017-12-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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