Huawei RRU Hardware Maintenance Manual page 28

RRU
Hardware Maintenance Guide
(1) Attachment plate for a blade RRU
Procedure
Step 1 Wear ESD gloves.
Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic
damage to the boards, modules, or electronic components.
Step 2 Use an M5 Phillips screwdriver to loosen the screws on the cover plate of the RRU cabling
cavity. Then open the cover plate.
Step 3 Record all the cable connections on the panel of the module to be replaced.
Step 4 Disconnect all cables from the cabling cavity and bottom panel in the sequence of power
cables first and ground cabes at last.
Step 5 Optional: If an RRU installed in centralized mode is to be replaced, use an M6 Phillips
screwdriver to loosen the two screws on the metal sheet, and remove the metal sheet, as
shown in
Issue 16 (2015-03-23)
Figure 4-9 Attachment plate and mounting kit for a 12 L blade RRU
Pre-loosen all screws before loosening them. This way, the screws are not damaged, and the
maintenance cavity is easy to be opened.
Figure 4-10.
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4 Replacing an RRU
Mounting kit for a blade RRU
21