Comtech EF Data XPA-200 - Manual (Page 82)

XPA200-7984-I-OPT1, X-Band SSPA Addendum
SYMPTOM POSSIBLE CAUSES SOLUTIONS
XPA200-7984-I-0PT1, Rev.2 7.4
settings between SSPA and
controlling terminal.
Entry mode of unit set to
“LOCAL”.
with remote control terminal
software.
Change entry mode setting in
“CONFIGURATION” menu to
“REMOTE”.
Amplifier Temperature
fault
Operating temperature limits
exceeded.
Air intake or air exhaust
paths obstructed.
Fan failure.
Defective transistor(s) in
amplifier module.
Note: The SSPA module
contains an internal
temperature monitor that will
shut off the unit (i.e. turn
off the 10V supplies) if the
heatsink temperature becomes
excessive. This prevents the
transistors from overheating
and destruction. After
cooling down below the trip
point, the unit will
automatically restart.
Do not exceed 50C ambient
input air temperature.
(Recommend 40C maximum)
Remove obstructions to ensure
adequate air flow and proper
amplifier cooling.
Check fan operation as
described earlier in this
table. Replace fan(s) if
necessary.
Use “MONITOR” menu to check
transistor currents. Compare
readings with nominal values
listed earlier. Report
excessive readings to
manufacturer and return
entire unit to manufacturer
for repair. There are no
user serviceable parts inside
the SSPA amplifier module.