Ac Fail; Cw Key; Rx Mute; Alarm Ack - Furuno FS-1575 Service Manual

6.5 SERVICE: TEST

1. AC FAIL

This test menu is used to ensure the input of the AC FAIL signal between #1 (AC FAIL)
and #2 (0V) of TB7 on the T-IF board. Causing a short circuit between the said AC
FAIL terminals will display "ON" in the AC FAIL column.
When the AC FAIL signal is detected, a popup message saying "Tx power reduced.
Ship's main failure." will appear on the window and an alarm sound will be outputted.

2. CW KEY

This test menu is used to ensure the input of the KEY signal between #11 (KEY-H) and
#12 (KEY-C) of TB7 on the T-IF board. Causing a short circuit between the said KEY
terminals will display "ON" in the CW KEY column if normal.

3. RX MUTE

This test menu is used to ensure the input of the RX MUTE signal between #15 (RX
MUTE N) and #17 (0V) of TB6 on the T-IF board. Setting the RX MUTE to "L" level
will display "ON" in the RX MUTE column if normal. The signal ringtone will
definitely be muted.

4. ALARM ACK

This test menu is used to ensure the input of the ALARM ACK signal between #9
(ALM ACK H) and #10 (ALM ACK C) of TB7 on the T-IF board.
Causing a short circuit between the said ALARM ACK terminals will display "ON" in
the ALARM ACK column if normal.

5. EXT PTT

This test menu is used to ensure the input of the REM TX KEY signal between #14
(REM TX KEY N) and #9 (GND) of TB7 on the [REMOTE] port.
Setting the REM TX KEY signal to "L" level will display "ON" in the EXT PTT
column if normal.

6. CONTINUOUS PRINT

This test menu is used to conduct a printer test. Selecting this menu will display the
"START / STOP" popup window.
Clicking on "START" will print "0123456789" on each line.
To stop printing, click on "STOP."
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