User's Manual

ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance
Page 5-5
© 2003, ADC Telecommunications, Inc.
3 FAULT ISOLATION AND TROUBLESHOOTING
Alarm information may be accessed and faults isolated using the information provided by the
unit front panel LED indicators, the EMS software GUI alarm displays, or the NOC-EMS
interface. Because the alarm information provided by the EMS GUI and the NOC-EMS
interface is very detailed, refer to Table 5-4, Table 5-5, or Table 5-6 to determine the unit LED
indicator (Host Unit, Remote Unit, or LPA) that corresponds to the indicated alarm. Then refer
to Table 5-7, Table 5-8, or Table 5-9 to identify the problem, check out the possible causes, and
take corrective action.
Table 5-4. Host Unit Major and Minor Alarms
MAJOR ALARM LED INDICATOR MAJOR ALARM LED INDICATOR
Operating Mode STANDBY Fwd Synth Lock HOST UNIT
8 Volt HOST UNIT RF Mute (Does not apply)
Pri No Light PORT 1/PORT 2 Major Extern Output (Does not apply)
Pri Fwd Mux Lock HOST UNIT Companion Lost (Does not apply)
Pri Rev Synth Lock HOST UNIT
MINOR ALARMS LED INDICATOR
Overdrive DRIVE Temperature HOST UNIT
Unit Mismatch HOST UNIT Sec No Light (Does not apply)
Link Alarm (Does not apply) Sec Errors (Does not apply)
3.8 Volt HOST UNIT Sec Rev Synth Lock (Does not apply)
Pri Laser Fail HOST UNIT Underdrive DRIVE
Pri Errors PORT 1/PORT 2 Minor Extern Output (Does not apply)
Table 5-5. Remote Unit Major Alarms
MAJOR ALARM LED INDICATOR MAJOR ALARM LED INDICATOR
Operating Mode STANDBY Battery Voltage (Does not apply)
3.8 Volt STM Pri Laser Fail STM
Pri Errors PORT 1/PORT 2 Fwd Synth Lock STM
Reference Synth Lock STM System VSWR VSWR
LPA DC Fail PA LPA Low Power PA
LPA VSWR PA Unit Mismatch STM
Link Alarm (Does not apply) Converter STM
AC Fail AC POWER Pri No Light PORT 1/PORT 2
8 Volt STM Pri Rev Synth Lock STM
Pri Rev Mux Lock STM LPA Detect PA
RF Mute (Does not apply) LPA Over Power PA
LPA Loop Failed PA Companion Lost (Does not apply)
Major Extern Alarm Inp (Does not apply) – –