Service Manual

370
6802800U74-AN
Chapter 13: MTS Troubleshooting
13.1.6
Other Site Controller Symptoms
Table 110: Other Site Controller Symptoms
Symptom Possible Failure Corrective Action
Initial power up self test fails Site Controller Replace Site Controller.
Service terminal unable to com-
municate with Controller
Controller cannot communicate
over Ethernet
Site Controller functions normal-
ly at first then fails after a period
of time
Incorrect cable In-
correct setup param-
eters
Cabling problem Site
Controller
Controller overheat-
ing
Verify cable. Check terminal con-
figuration.
Check Ethernet cable and 50-Ohm
terminator on Ethernet termination.
Replace Site Controller.
Replace if required.
13.2
Base Radio / RFDS / Miscellaneous Troubleshooting
The built-in system troubleshooting intelligence is mainly accessed through the Site Controller and
Base Radio Controller(s) LED, Man-Machine Interface (MMI) status and fault indications.
13.2.1
Base Radio Troubleshooting
This section serves as a guide to isolate Base Radio failures to the module level. It contains
procedures for:
• Troubleshooting
• Verification/Station Operation
13.2.1.1
Base Radio Alarms
The following table displays the generic base radio alarms that can be listed using MMI command get
alarms.
Table 111: Generic Base Radio Alarms
Alarm ID
Descrip-
tion
Recovery
Action
Clear Ac-
tion
Notes
• ALM_BRC_NVM_CKSUM
_FAULT
• ALM_BRC_NVM_CKSUM
_FAIL
Checksum
fault for the
XCVR NVM
parameters
was detect-
ed during
initialization
- some of
the XCVR
Software at-
tempts to set
the parame-
ters to the
default val-
ues taken
from the de-
fault region
If the opera-
tion of re-
storing de-
faults is suc-
cessful the
alarm is
cleared. Oth-
erwise the
alarm status
Corrupted con-
figuration pa-
rameters may
cause that BRC
works incorrect-
ly. The default
values may be
different than the
lost parameter