User Manual

AS4000 Operations and Maintenance

Section

605-0000-431

. Issue 1.6. Date3/2/99

DLP-007

Page 29 of 44 © Copyright Airspan Communications Corporation 1999

STEP PROCEDURE

Observe full ESD precautions.

1. Press Receive Attention on the modem shelf cover to suppress alarm.

2. If FRU fail change card. Use the board extractor lever to remove the card from the shelf.

Replace the card ensuring that the card is located within the shelf card guides. Use the

extractor lever to ensure that the card locates properly. Observe full anti-static

precautions.

3. If modem link fail check if other modems are affected. If the problem is on all modems on

the rack there is probably a common radio path fault (LNA /Feeder/ Antenna). If only

one shelf is affected it is likely that there is a common card fault (RF /AU/PA). If only one

modem is affected then the fault is either in the Modem or Radio Network Unit.

4. Check to see if other shelf / rack alarms are present to establish whether common radio

path fault, common card fault or individual card fault.

5. If fault is card within the rack. Use the board extractor lever to remove the card from the

shelf. Replace the card with a new one ensuring that the card is located within the shelf

card guides. Use the extractor lever to ensure that the card locates properly. Observe full

anti-static precautions.

6. If fault is still present re-insert the original modem. Note: All LEDs will be illuminated for

2 s during module boot-up.

7. If modem passes self test fault is probably at the ST. Use ST faulting procedure Section 5

STOP. THIS PROCEDURE HAS BEEN COMPLETED.