Furuno FS-1503 - Self-Test Algorithm; Self-Test Flow

5-3
Self-test Algorithm
(TX/RX Board)
TX + POWER ON
TLX/AGC: ON/RF gain: max. /Freq.:13.5 MHz
Self check signal: ON
S level reading
S level > 4?
R Good displayed
(Beep
×
1)
R no Good displayed
(Beep
×
3)
TLX/Tone: 1700 Hz/Freq.:3 MHz/PA: OFF/EXC:
ON/Power data: 255
EXC CHK level reading
> 0.8V?
TE Good displayed
(Beep
×
1)
TE no Good displayed
(Beep
×
3)
Power on while pressing and holding down [TX].
13.5 MHz produced from 2LO is input to antenna.
Mode: TLX, AGC:ON, RF GAIN: automatically
set to Max.
U22 ON TX/RX PCB: ON
J6-6 on TX/RX PCB
YES
NO
NO
YES
0.8 V : RF OUT 20W
2.4 V : 140W
3 MHz, TLX, POWER DATA: 255,
Only TX on TX/RX PCB turned ON.
Receiver on TX/RX PCB check
Transmitter on TX/RX PCB Check
TE Good or TE no Good displayed
Self Test completed
The test proceeds to next step;
1) if dummy board is fitted,
2) if system channel 9917 is set to “1”, and
3) if above test is successful (TE Good).
Cont’d on next page
Figure 5-1 Self-Test Flow (1/2)