Daily Test - Furuno FM-8800D Operator's Manual

6. MAINTENANCE & TROUBLESHOOTING
6.3

Daily Test

Authorities require that the DSC be checked daily for proper operation to ensure
that it will function properly in the event of distress. Execute the daily test as
below.
1. At the standby display, press the SHIFT key and TEST key in that order. The
following display appears for test. And distress alarm (visual and audible)
occurs.
Test in progress
*** DAILY TEST ***
TX POWER
TX/RX PCB
CPU PCB
CH70 RX PCB : OK
DUP RX PCB : OK
IC-350
2. To stop ALARM, press the CANCEL key.
3. To stop the daily test, press the CANCEL key.
"NG" may be displayed depending on the receiving conditions. In this case, repeat
the daily test a couple of times. If NG is displayed always, contact a FURUNO agent
or representative for advice.
The table below shows the abnormal indications and causes shown in the daily test.
Indication
TX POWER: NG
TX/RX PCB: NG
CPU PCB: NG
CH70 RX PCB: NG
DUP RX PCB: NG
IC-350: NG
If necessary, refer to Parts Location on subsequent pages.
6-2
(Pop-up display appears momentarily .)
If you have not pressed the PTT switch
: OK
before executing the test, "NO CHECK"
: OK
is displayed.
: OK
FM-8800D only
: OK
If IC-350 is not connected, this item is
not shown.
Result of daily test
Indicates no transmitting output power.
PA module or TX/RX pcb 05P0774 may be damaged.
Indicates abnormal PLL circuit in the TX/RX pcb.
TX/RX pcb 05P0774 may be damaged.
Indicates abnormal loop circuit inside the CPU board.
CPU pcb 05P0773 may be damaged.
Indicates abnormal loop circuit between CPU and CH70
RX pcb. CH70 RX pcb 05P0775 may be damaged.
Indicates abnormal PLL circuit in the DUP RX pcb.
DUP RX pcb 05P0777 may be damaged
Indicates that the IC-350 has some abnormality.
Cause