Specifications

1-34 Transmitters 4000326 Rev A
Troubleshoot Alarm Conditions,
Continued
Troubleshooting Power Supply Alarms
The following table shows the possible causes of power supply alarms and their
solutions.
Note: Some or all of the steps will cause a service interruption.
Alarm Status Possible Causes Possible Solutions
Loose, unplugged,
or damaged power
cords.
Check the power supply
power cord and
connections.
A blown fuse on the
power supply.
Check the power supply
fuse. Repair or replace as
needed.
A faulty power
supply module.
Verify proper power supply
module operation. Repair
or replace as needed.
The transmitter is
not seated properly
in the chassis.
Verify that the transmitter is
securely connected to the
chassis.
Damage to the
chassis or module
backplane
connector.
Verify that DC power is
present at the receptacle in
the chassis and that there is
no visible damage.
• +5 V DC analog
power
• +5 V DC
digital power
• -5 V DC
digital power
• +15 V DC
digital power
• +24 V DC
digital power
High or Low
• A faulty
transmitter
module.
• No AC at
receptacle
Are any other units in this
chassis having the same
problem?
• If no, the transmitter
may be faulty and
should be replaced.
• If yes, the chassis may
have a problem.
For help, telephone the
Scientific-Atlanta assistance
center in your area.
Continued on next page