Furuno FR-1500 - Manual (Page 117)

-9.5-
9.2 Circuit diagrams
U42 SN751178NS
4
15
13
14
U89 PC400
CR40
1SS181
R385 47
U91 PC400
CR43
1SS181
R401 47
4
1
3
1
3
4
U12 SN751178NS
12
15
13
14
TALKER (60 mA max)
LISTENER (2 mA at 2 V)
RD1-A
RD1-B
GND
GND
TALKER (60 mA max)
GND
J2 B5B-XH-A
J203 B5B-XH-A
J202 B5B-XH-A
U3
CPU
03P9230
1
2
4
3
5
4
1
2
3
5
4
3
5
FR-1500 Mark-3 SERIES SERIAL INTERFACE I/O CIRCUIT
1
2
CHANNEL 1
INPUT
BWC, BWR,
DBS, etc.
CHANNEL 2
INPUT
DBK, DBS, DPT,
MDA, MTW, VBW RD2-A
RD2-B
CHANNEL 2
OUTPUT
TTM
CHANNEL 1 OUTPUT
RSD, TLL
TD1-B
FL9
U23
FL8
CPU
18P9004
ARP-17
TX1-C
FL10
FL11
TD1-A
TX1-H
ARPA TXD B
ARPA TXD A
CHANNEL 3
INPUT
HDB, HDM,
HDT, VHW
J208
FL13
FL12
U94 PC400
CR47
1SS181
R417 47
1
3
4
RD1-A
RD1-B
GND
U3
CPU
4
3
5
FL15
FL14