General Replacement Procedure; Preparation; Taking Out The Board - Huawei Airbridge CBTS3612-800 User Manual

User Manual
Airbridge cBTS3612-800 12-carrier CDMA Base Station

1 General Replacement Procedure

1.1 General Replacement Procedure of Boards

1.1.1 Preparation

1) Query Alarm
Before the replacement of a board, check the alarm information in BCKM at the local
end maintenance console. After replacement check again and see if recovery alarms
are generated.
2)
Check version
Before the replacement of a board, check the versions of the board and its software.
After the replacement, check again to make sure the versions are the desired ones.
3)
Security precautions
Some of the boards or modules are vulnerable to static electricity. Please take
anti-static measurements while operating on these boards and modules, e.g., put on
well-grounded anti-static wrist strip and gloves.
4)
Power off
Shut off the power supply for the related boards to be replaced and turn it on after the
replacement.
The power supply of all boards in a base band subrack is controlled by the switch in
the subrack. When replacing a board in the base band subrack:
Turn off the base band subrack switch while replacing boards such as BCIM or
l
BCKM (when only one BCKM is configured for the BTS).
Do not turn off the base band subrack switch while replacing boards such as
l
BRDM, BCPM or BCKM (when 2 BCKMs are configured in active/standby mode
for the BTS).
5) Block sector carrier
Block the BTRMs that may be affected by the replacement of a board of the base
band subrack.
No blocking/unblocking is necessary when switching on/off the power supply of a
BTRM.
6)
Commonly-used Tools
For the replacement of a board or module: a cross screwdriver that matches the M3
screw is required.

1.1.2 Taking out the Board

1)
Turn anti-clockwise the fastening screws at the upper and lower ends of the
board panel until they go off the cabinet.
2)
Hold the handle bar of the board. Quickly and simultaneously pull it out and
rotate for 45
3) Pull out the board along the slot and put it into the anti-static packing (keep bear
hands off the printed circuit board).
03Q-0112-20020720-120
1 General Replacement Procedure
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