SRT X-BAND RADAR SYSTEMS
TROUBLESHOOTING
304202P003 5.2 Rev. C
TXRX does not turn on
Transmitter can't be controlled
Antenna data can't be controlled
Transmitter performance is low
Sector Blanking is not working
Antenna does not rotate
There is no current to magnetron
Transmitter does not generate RF
Antenna rotates, but rotation speed cannot
be controlled
Potential Cause Check Remedy
x x
Circuits are damaged Check input and output azimuth signals on SRT_Control board
Replace the damaged
board
x
High voltage is too low Check magnetron current and 700VDC voltage value
Adjust high voltage values
on SRT_Power Board
x
Motor power supply is missing
Check if 24VDC voltage value on Brushless Motor Controller ends is low or
missing
Connect the 24VDC volt-
age to the controller prop-
erly
x
Motor power supply is missing Check Brushless if Motor Controller enable signals are missing
Replace SRT_Control
Board
x
Motor power supply is missing Check Brushless if Motor Controller enable signals are present
Replace the Brushless
Motor Controller
x x
Modulator is damaged
Disconnect 700V cable from TB3 of SRT_Power Board, disconnect mo-
tor cables, turn S1 of the SRT_Control Board on position 3 and make sure
DL3 is off.
Replace SRT_Mos Board
x
Brushless Motor Controller is not
enabled properly
Check Brushless Motor Controller Signals
Replace SRT_Control
Board
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