Ic-305, 306 - Nera Inmarsat-c Service Manual

5.5.2 IC-305, 306

Fig. 5.5.3 shows the LED on IC-306 board.
U3
Unit LED No.
IC-305
IC-306
Note)
1) When the ACK button of IC-305 board is pressed, ACK LED is on and the buzzer is
released.
2) NEVER press the distress alert button. The distress alert test is started by
"Distress Alert Button Test" ([F7]-7-4). Before the test, the antenna should be
disconnected.
3) When the button on IC-306 is pressed, LED is on and the buzzer is released.
Fig.5.5.3 LED on IC-306 board
Function
CR5 Checking of U3.
5-16
CR5
Note) CR5 on IC-306 is installed to
the same place on the IC-305.
Status
Blinks every 1 second when
no error is detected.
5.5 LED