Board And Part Replacement; Overview; Replacement Of Bts E1 Surge Protector (Besp) - Huawei Airbridge CBTS3612-800 User Manual

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

2 Board and Part Replacement

2.1 Overview

This chapter details the precautions and procedures when various boards and parts
of cBTS3612-800 are replaced. For the common parts of the replacement, please
refer to "Chapter 1 Universal Replacement Process". This chapter will not describe
again any content in "Chapter 1 Universal Replacement Process" unless it is worthy
of special note.
Before various boards and parts are dismounted, usually unscrew the screws
fastening the boards or parts with a cross screwdriver and tighten them when new
boards or parts are installed. This procedure will not be specially described in later
sections.

2.2 Replacement of BTS E1 Surge Protector (BESP)

I. Note
1)
The replacement of a BESP will interrupt all services transmitted via this BESP.
2)
BESP board should be anti-static, therefore operations should be made strictly
based on operation procedures. That is to say, wear an anti-static wrist strap and
gloves and make the grounding terminal well grounded to prevent any static
electricity damaging the board.
II. Replacement Details
1)
Shut off the base station power
Shut off first all the switches on the switch box of the base station and then -48V DC
output of AC/DC power.
2)
Dismount the BESP
Unplug the E1 trunk cables of two 25-pin interfaces on the BESP and unscrew the
screws at the four corners of BESP to dismount the BESP at the top of the equipment.
And unplug from the 37-pin interface the E1 trunk cable connected with BCIM.
3)
Install a new BESP
Connect the trunk cables between BCIM and the new BESP, install the new BESP at
the top of the equipment and connect the trunk cables at the 25-pin interface.
4)
Re-power on
Start the -48V DC output of AC/DC power and turn on the switches on the switch box
corresponding to the configured board or module.
5)
Test
Observe the starting and running status of the base station and conduct a
conversation test.
6)
After replacement
If the new BESP has passed all tests, related alarms disappeared and corresponding
recovered alarms occurred, it shows that the replacement of a BESP is completed.
03Q-0112-20020720-120
2 Board and Part Replacement
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