Comtech EF Data XPA-200 - Manual (Page 80)

XPA200-7984-I-OPT1, X-Band SSPA Addendum
SYMPTOM POSSIBLE CAUSES SOLUTIONS
XPA200-7984-I-0PT1, Rev.2 7.2
connections.
Firmware not properly seated.
Faulty 28V power supply.
Failed fan, faulty control
circuitry.
connections at P4 and P5 are
not loose. Also check the
cable connection at the fans.
There should be approximately
24Vdc between the two pins at
the fan. Check cable for
continuity. Replace cable
wiring if faulty or return to
factory for cable repair.
The fans are microprocessor
controlled and monitored.
Therefore, make sure U11 and
U12 on AS/0200 are properly
seated.
Check the output voltage of
the 28V power supply. (Either
via the front panel “MONITOR”
menu or using a voltmeter.)
Replace Fan if faulty or
return to factory for repair
or replacement.
Display not turning
on, missing text,
incorrect
backlighting, etc.
Firmware not properly seated.
Faulty wiring, bad
connections.
Failed display, failed
display control card.
Failed circuitry on AS/0200
or AS/0206.
Ensure U11 and U12 on AS/0200
are properly seated.
Ensure good cable connections
from M&C cards AS/0200 and
AS/0206 to display card
located behind front panel.
Check cables for continuity.
Replace cable wiring if
faulty or return to factory
for repair.
Return to factory for repair.
Return to factory for repair.
No RF output, or
output level much
less than expected.
Mute function activated. Check the “CONFIGURATION”
menu to determine if the mute
function has been activated.
“MUTE = ON” means that the
unit is muted. Turn the
“MUTE” feature to “off” to
allow RF amplification of the
input signal.
The “AMPLIFIER = OFF” feature