User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
4
. Issue 1.6. Date3/2/99
DLP-004
Page 8 of 44 © Copyright Airspan Communications Corporation 1999
Maintenance Clear Strategy
SC Card Faults
STEP PROCEDURE
Observe full ESD precautions.
1. During this procedure use antistatic precautions when handling cards.
2. Press Receive Attention on the modem shelf cover to suppress alarm.
3. Check that there is power to the shelf. (amber LEDs should be illuminated). If
there is no power to the shelf use DLP-012 to diagnose power problem.
4. Check that the PC is functioning correctly.
5. Check that the interface plugs are securely fitted to the PC and the modem shelf
backplane.
6. Check the Status and diagnosis of the SC card using the table below.
Status SC Card LED Diagnosis and repair Action
Amber Red
Idle
State
ON ON OK no messages being sent. Check that the card is in a
genuine idle state If the card is in the idle state it is possible
to stimulate it to send a message. If the combiner shelf
PSUs indicate that they are OK (amber LED illuminated)
and no fail indications. Switch off one of the DC input
switches located on the combiner shelf. The three PSU fail
lights will operate and PSU fail messages will be sent to the
Sitespan . Check with the Sitespan to see if the messages
are received. If the messages are not received check the
connections to the PC, if these are OK change the Shelf
Controller card.
Active
State
ON OFF OK messages being sent to Sitespan for up to 3 mins before
returning to idle state. If the card does not return to the idle
state after 5 mins change the Shelf Controller card.
FRU fail OFF ON FRU fail change Shelf Controller card
Dead OFF OFF Shelf Controller card
7. If replacing with a new SC card ensuring that the card is located within the shelf
card guides. Use the extractor lever to ensure that the card locates properly. This
should not effect traffic using the shelf.