Comtech EF Data XPA-200 - Manual (Page 79)

XPA200-7984-I-OPT1, X-Band SSPA Addendum
XPA200-7984-I-0PT1, Rev.2 7.1
Addendum
7.1 General
This addendum section contains additional items as listed
below:
1. Additional Troubleshooting helps (Table 7.1)
2. Wiring diagram.
3. Top level parts list.
7.2 Additional Troubleshooting Information.
Table 7.1
Additional Troubleshooting Help
SYMPTOM POSSIBLE CAUSES SOLUTIONS
Unit does not turn on
(no display, no front
panel lights, no
fans).
Power cord not plugged in.
Faulty wiring to 28V power
supply.
28V power supply fault.
Check power cord connections.
With input power cord
removed, check wiring and
connections to 28V power
supply.
Check output of 28Vdc power
supply.
Either one or both
fans do no turn on.
Faulty wiring, bad
Note: At power-up, the fans
are sequenced on. Therefore,
in normal operation, the
second fan does not turn on
until approximately 3 seconds
after the first fan.
Check AS/0206 to ensure that