Simrad SRT - Page 21

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Diagnostics | SRT LAN radar sensor S-band down-mast Service Manual
electrostatic discharge.
SRT Control PCB LEDs in serial conguration
PCB label LED color Indication
D23 Green TX / Red RX Tx Rx Comm (RS232 or RS422)
D26 Green
Red
Line OK
Not used
D3 Red
Green (slow flashing)
Blue (slow flashing)
ST-BY
OK status
Local mode
SRT Control PCB LEDs in combined video conguration
PCB label LED color Indication
D23 Green TX / Red RX
(flashing)
TX active/RX active
D26 Green Line OK (50V input is >32V)
D3 Red (slow flashing)
Green
Blue
Fail
LED D3 blinking red
Fail Cause
Magnetron heater fail Vfil < 4.5V and > 6.5V
24 VCO fail 24 V (voltage) < 18 V and > 30 V
+15 fail 15 V(voltage) < 14 V and > 16 V
Rx fail If no packet has been received after 5 seconds
CRC fail If there is a CRC failure in receiving a packet
Interlock open If the interlock is open
Safety switch open If the safety switch is open
+24 V fail < 18 V if power supply of SRT is 24 V
+52 V fail < 40 V if power supply of SRT is 52 V
Front end fail If Monitor voltage is < 35 mV and > 65 mV