Replacing The Backplane - Huawei Airbridge CBTS3612-800 User Manual

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

1.2.2 Replacing the Backplane

I. Dismount the BTS cabinet door
Unscrew the fastening screws on the related cabinet door.
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Dismount the related cabinet door with two hands.
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Put gently the dismounted cabinet door at a reliable location.
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II. Remove the board or module on a backplane
Unplug all boards or modules on a backplane.
III. Unplug the backplane cable
Unplug the cables on the back of the backplane, such as the data line, alarm cable,
power cable, etc. and record the cable connection modes in detail.
IV. Removing a board
1)
Unscrew the fastening screws on the backplane and cabinet. Do put the screws
where they should be to prevent them falling into the cabinet and leading to short
circuit.
2)
Dismount the backplane gently with two hands.
Caution:
1) To dismount a base band frame backplane, first take off the metal shielding can over the backplane.
To install a base band frame backplane, install first the backplane and then a metal shiedling can.
2) Because the backplane is very big and heavier than a common board, there must be some help in
dismounting or installing the backplane lest any accident should occur.
V. Preparations for backplane installation
Before a backplane is installed, take the backplane out of the anti-static packing box
(do not touch the surface of the printed circuit board) and check whether there is any
damage, such as broken line and short circuit.
VI. Installation & fixation of a backplane
Put the backplane close to the corresponding plug-in frame and align the screws.
Then, take out of the screws when the backplane is dismounted and fix the backplane
on the frame.
VII. Backplane distribution
Connect various cables together in strict recorded cable connection order.
VIII. Backplane switch setting
If there are switches and jumpers on a backplane, set the switches and jumpers on
the new backplane according to the original one.
03Q-0112-20020720-120
1 General Replacement Procedure
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