jotron TR-7750C - Page 78

Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
Page 6-2
P/N: 84748 (pre_F)
28V
12V
5V
3.3V
-5V
One of the voltage
readings is out of
range
High
Temperature
Temperature
reading is above
+85°C
High Current
Current
consumption is
above 10A
High SWR
Caused by a SWR
reading higher
than 1:3
PA Module
TX alarm
Action:
Check antenna /
Antenna
connectors /
Antenna Cable
Action:
Replace -
TX unit (LRU)
PA module (LRM)
Probable cause:
Defective output
transistor
Action:
Replace -
TX unit (LRU)
PA module (LRM)
Probable cause:
Defective fan(s)
Action:
Replace -
TX unit (LRU)
PA module (LRM)
Probable cause:
Defective
component on
power regulator
board
Figure 6.1-1, Transmitter PA module, errors and corrective actions