Furuno FR-2155, Service Manual

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2-16
A6
P551
G/A
U35
TX Key
TX FH
ST-BY FL
03P9253(SPU Board)
17
P313
ANT SW
PAL Board
17
ANT ON/OFF
S 1
B18
J312
03P9255
B19
2
3
J313
A6
J551
03P9251
A18
A17
J412
C8
#16
#1
#32
J417
5
P417
03P9252(INT Board)
5
J467
03P9254
PANEL Board MOTHER Board
U51
DTB 2
#7
ANT.1
PSU-004(03P9146)
PTB-13
#4 Q1,2
#4
#6
#9
K1
#4
PTB-14
#1
#2
#3
XK-1
PTB-12
Ship's Main(DC24V)
{
|
MOTOR
DTB 2
#2
MOTOR SW
STB 1
#24
MOTOR SW
#26
SW(S801)
+12V
SCANNER UNIT
K2
THERMAL RELAY: 24Vdc
2.15 Antenna Control Signal
The SPU board generates antenna on/off signal when the TX key is pressed. The
service switch S801 on the scanner unit and antenna switch on the PAL board also
turn on/off the antenna. The figure below shows the flow of the antenna control
signal which turns on/off the relay in the PSU-004.
Figure 2.12 Antenna on/off Control