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Troubleshooting | SRT LAN radar sensor S-band down-mast Service Manual
Failure message Corrective action Other
Magnetron EOL Replace the Magnetron
Modulation fail and low
PWR line level
Replace the Magnetron If the problem still exists
replace the SRT MOS PCB
Poor quality image on
the screen (performance
is degraded)
Proceed to automatic tuning. If
the tuning bar is too low replace
the RF detector and LNFE assy
If the poor quality image is
still on the screen replace
the S band TR Limiter
Big ball on the center
of the screen and weak
signal from far ranges
echoes
The coax cable is damaged. Proceed to a full inspection of the
coax cable. Dry it if it is necessary and if it seems corroded then
replace the duplexer and/or the S-band TR Limiter and/or the
Magnetron and/or the RF detector LNFE assy
Low PWR level with good
performance
Replace the diode assembly
No ring on the screen
using performance
monitor test
Replace the diode assembly
TX/RX overheating Check the environment of the
TX/RX room
Radar fail Check the SRT LAN CPU PCB
and replace it if broken
Check the external LAN cable
Check the internal LAN
connection
No spoke data Check the LAN connection
Check the Bearing reader PCB
and replace it if broken
Check the SRT Control PCB and
replace it if broken
Check the connection cable
from the SRT control to the
Bearing reader
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