Simrad SRT - Main possible failures

26 |
Troubleshooting | SRT LAN radar sensor S-band down-mast Service Manual
The antenna doesn’t rotate
Step Check Yes No Corrective action
1
Check the brushless controller’s led
green lighted
√ Check the 50 V connection
if the 50 V is present replace
the Motor controller
2
Check on the brushless controller if
the same red led is on
√ The controller is not enabled,
Check ON the safety switch,
Check ON the interlock ,
Check the presence of 10 V
on grey wire on the Motor
controller connector
3
Check if 10 V is present on the grey
wire on the Motor controller assy
√ Check the EN connection
(grey wire) from the SRT
Control PCB to the Motor
controller
4
Check if the EN connection (grey wire)
is present from the SRT Control PCB to
the Motor controller
√ Replace the SRT Control PCB
√ Restore the connection
5 Check on the brushless controller
which red led is on
√
6 Led IxT lighted √ Replace the gearmotor
7 Led PTC lighted √ Motor controller is in
overtemperature, check the
heatsink
8 Led O.C lighted √ The motor wiring or the
motor winding are in cc,
replace the motor
9 Led Hall lighted √ The hall cell doesn’t work
properly, check the +5 V on
the red motor controller
cable. If it is present replace
the motor. If it is not present
replace the motor controller
Main possible failures
Failure message Corrective action Other
Magnetron heat fail Replace the SRT MOS PCB If the problem still exists
replace the SRT PWR-DC PCB
24 VCO fail Replace the SRT PWR DC PCB
+15 fail Replace the SRT PWR DC PCB
RX fail Replace the SRT Control PCB
CRC fail Replace the SRT Control PCB
Interlock open Check if the door is correctly
closed. If it is, replace the
internal safety switch
Safety switch open Close the safety switch
+48 Fail Replace the Power supply
Front end fail Replace the RF detector and
LNFE assy