Step 6 Connect the signal cable terminals and COM communications cables to the panel
of the new SMU based on the recorded information.
Step 7 Disconnect the ground cable of the ESD wrist strap, and remove the ESD wrist
strap and ESD gloves.
----End
Follow-up Procedure
Pack the removed component and send it to the local Huawei warehouse.
7.5.3 Replacing an SMU11C
Prerequisites
●
An ESD wrist strap, ESD gloves, and ESD box or bag are available.
●
The new SMU is intact.
Procedure
Step 1 Connect the ground cable of the ESD wrist strap, and wear the ESD wrist strap and
ESD gloves.
Step 2 Record the cable connection positions on the panel of the SMU, remove the COM
communications cables, and remove the signal cable terminals.
Step 3 Pull out the handle of the SMU to remove the SMU from the subrack.
Figure 7-18 Removing the old SMU
Step 4 Record the DIP switch settings on the SMU.
Step 5 Take out a new SMU and set the DIP switch based on the recorded information.
Step 6 Insert the new SMU into the corresponding slot and slide it along the guide rails
until it is in position.
Step 7 Push the handle of the SMU upward until it is in place.
Figure 7-19 Installing a new SMU
ETP4860-B1A2 Embedded Power
User Manual
7 Maintenance
Issue 04 (2021-01-05)
Copyright © Huawei Technologies Co., Ltd.
80
