User's Manual Part 3

Maintenance and Servicing - 155 -
Affinity® LBD-200C-N1 Transmitter
Product Manual
Problem:
No output power on the Driver DC Power Supply
Possible Cause Solution
Short circuit or current overload Test the 48-pin connector on the backplane
assembly for any short circuits.
Short circuit or current overload Find the plug-in module that is causing the
overload by swapping with a known good plug-in
module.
Failure in plug-in module Contact Thales Customer Service Department
Upconverter plug-in module
The Upconverter plug-in module is equipped with a Liquid Crystal Display (LCD) assembly that
provides a PASS/FAIL status for each plug-in module, as well as a series of measurements and
user adjustments.
To view the status of each plug-in module, perform the following:
x Press the Select key on the Pre-Amplifier keypad assembly. When “STATUS” is
displayed press the ENTER key.
x Select the plug-in module to be tested.
x The LCD will display a PASS or FAIL for the plug-in module being tested
x If a FAIL is displayed, contact the Thales Customer Service Department for a
replacement.
NOTE: There are no user-level troubleshooting steps for the plug-in modules
If the Reflected Power measurement is high, check the following:
x Output cables between amplifier chassis(s) and output RF filter
x Output RF filter
x High Power Combiner and reject load, if applicable
Connections to the antenna
If these checks have been verified and problems still exist, contact Thales Customer Service.
If the Forward Power measurement is low, check the following:
x Check the LEDs on the Power Amplifier Segment. The LEDs should be lit Green.
x Check the status of each plug-in module via the keypad on the Pre-Amplifier plug-in
front panel.
x If no Power Amplifier Segment or plug-in module indicates a FAIL condition, use the
keypad and LCD to display the IN-SIGNAL condition.
x If the IN-SIGNAL status indicates a NO IN-SIGNAL condition, check the signal
source.