Replacement Of Combining Duplex Unit (Cdu) - Huawei Airbridge CBTS3612-800 User Manual

User Manual
Airbridge cBTS3612-800 12-carrier CDMA Base Station
6)
Change the management state of the blocked BTRM
Unblock the blocked BTRM.
If you turn off the power switch of a corresponding BTRM in advance instead of
blocking the BTRM, then turn on the corresponding switch in this step.
7)
After replacement
If the RLDU is found working normally, related alarms have disappeared and
corresponding recovered alarms occurred, it shows that the replacement is
completed.
Caution:
If the RLDU has not been plugged well and the screws not tightened, the transmitting/receiving indices
of the base station may be made to decrease.

2.13 Replacement of Combining Duplex Unit (CDU)

I. Note
1)
Before the operation, block the BTRMs connected with CDU at the maintenance
console.
2)
When dismounting/mounting the radio frequency transceiving cable on the CDU
panel, take care not to damage any cable connector. When installing cables,
fasten the connectors of various cables and keep them in good contact. Do not
damage any connector.
II. Replacement Details
1)
View the CDU alarm and block the corresponding BTRM
Connect a portable computer with the local-end maintenance software with the
Ethernet interface of a base station BCKM and switch on Telnet to log on to the base
station. Then, view and record the fault type of CDU.
For a BTRM which will interrupt services, execute the command of sector carrier
blocking or shut off its power.
2)
Check the location of the CDU to be replaced in thecabinet and the working
status and type of CDU so as to avoid any mistake.
3)
Dismount the cable connectors connected with the CDU module to be replaced
and panel fastening screws.
4)
Pull out the CDU and install a new one.
After the connectors and screws on the CDU panel to be replaced have been
dismounted, unplug this CDU. If the CDU to be replaced can be replaced with the
new one, install this new CDU.
5)
Plug the new CDU along the slot and fasten it.
6)
Connect in turn the radio frequency cables on the CDU panel and note that the
main diversity cables should be connected correctly as numbered.
7)
Change the management state of the blocked BTRM
Unblock the blocked BTRM.
If you turn off the power switch of a corresponding BTRM in advance instead of
blocking the BTRM, then turn on the corresponding switch in this step.
03Q-0112-20020720-120
2 Board and Part Replacement
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