Specifications

1-82 Transmitters 4000326 Rev A
Troubleshoot Alarm Conditions
Introduction
The following troubleshooting information helps identify possible causes and
solutions to transmitter alarm conditions.
Troubleshooting Alarms
If the red Alarm indicator is illuminated or blinking, check the ICIM display or the
appropriate LCI screen to determine the cause of the alarm.
Refer to the following table for troubleshooting assistance.
Alarm Status Possible Causes Possible Solutions
LasBias Failed
Automatic power control circuit
failure.
Telephone the Scientific-
Atlanta assistance center in
your area.
LasTemp High or Low
Laser temperature out of
specification. Laser could be
faulty.
Telephone the Scientific-
Atlanta assistance center in
your area.
ModTemp High or Low
Ambient temperature is too high
due to:
• A failure in the building air
conditioning system.
• Air flow through the rack
has been restricted or cut off.
• Chassis cooling fans are not
operating properly.
Ensure the airflow system has
not been damaged or
removed. Repair or replace
fan tray as needed.
To troubleshoot the chassis
cooling fans, refer to the
Prisma II Chassis Installation
and Operation Guide, part
number 713375.
InRF High or Low
RF source not transmitting.
Faulty RF cables or connections.
Check RF source and cables
and all connections.
OutPwr High or Low Laser could be faulty.
Telephone the Scientific-
Atlanta assistance center in
your area.