User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
4
. Issue 1.6. Date3/2/99
DLP-007
Page 28 of 44 © Copyright Airspan Communications Corporation 1999
Maintenance Clear Strategy
Start
Remove and replace
modem card
Take anti static
precautions.
is
alarm FRU
Fail
?
Finish
No
Yes
is
alarm Link
Fail
?
Finish
Check AU
RF and PA cards
Replace Faulty Unit
is
alarm on all
Modems
?
No
No
is
alarm on all
shelves
?
Yes
No
Check LNA cards
and Antenna Feeds
Replace Faulty Unit
Replacewith a new
Modem Card
No
Finish
Finish
Send faulty
unit for
repair
Re-insert
original Modem Card
The fault is probably
not in the CT.
It is possibly a blocked
radio path or a faulty ST
that is unable to report
a fault over the link.
Use ST faulting procedure
(section 5) to fault ST
Finish
Yes
Is
alarm
still
present ?
are
other rack
alarms
present ?
use faulting
procedure for
other alarms
Yes
No