Alarm - Furuno FS-1575 Service Manual

6.3 ALARM

Alarms that are currently occurring can be checked by selecting [MENU] ->
8. ALARM.
Alarms displayed on the window will be automatically cleared when the relevant event
is eliminated.
To check for the ALARM LOG, select [MENU] -> 9.SERVICE -> 6.MAINTENANCE
LOG -> 2.ERROR LOG. For details, refer to information on page 6-43.
ERROR
TX PLL UNLOCK
RX PLL UNLOCK
WR1 PLL UNLOCK
WR2 PLL UNLOCK
MAIN AMP HEATED
SHIP'S MAIN
FAILURE
VC ERROR
Tip;
Reference frequency supplied to the PLL circuit of each board is distributed from the
TX board.
If the PLL circuit of any of the TX, RX, WR1, and WR2 boards becomes unlocked,
replace the TX board.
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Condition
Occurs when the PLL circuit of the TX board
becomes unlocked.
Occurs when the PLL circuit of the RX board
becomes unlocked.
Occurs when the PLL circuit of the WR1 board
becomes unlocked.
Occurs when the PLL circuit of the WR2 board
becomes unlocked.
Occurs when a temperature not lower than the
threshold is detected on any of the DRV, PA1,
and PA2 boards (see pages 7-20, -23, and -25).
Note) There is no information available to
verify the relevant board.
Occurs when AC power supply to the AC/DC
power supply unit is down and 24VDC input is
switched to the radio battery.
** When the "#1: AC FAIL" terminal of TB7 on
the T-IF board becomes active.**
Note) The AC FAIL signal is outputted from
the AC/DC power supply unit.
FS-2575 and -5075:
Occurs when "PA VC" voltage goes to or
below 35V.
FS-1575:
Occurs when "PA VC" voltage goes to or
below 18V.
6-20
6.3 ALARM
Table 6.3.1 Alarm List
Countermeasure
Replace the TX
board.
Replace the RX
board.
Replace the WR1
board.
Replace the WR2
board.
Wait until the
temperature falls
below the
threshold.
Check for 24V
power supply
input voltage,