Furuno FS-1570 Service Manual page 134

Pin No.
T-IF
& Name
U2 1-8
#15 QA 9
#1 QB 10
#2 QC 11
U3
#3 QD 12
#4 QE 13
#5 QF 14
#6 QG 15
#7 QH 16
#16 Q1 17
#15 Q2 18
#14 Q3 19
#13 Q4 20
#12 Q5 21
#11 Q6 22
U4
#10 Q7 23
#9 Q8 24
#16 Q1 17
#15 Q2 18
#14 Q3 19
U5
#13 Q4 20
#12 Q5 21
#11 Q6 22
#10 Q7 23
#9 Q8 24
Table 5.3.5 Signals generated by DATA 1 on T-IF board
Order of
execution
N.C
N.C
N.C
U4 ST (NOR: ST CONT1)
U5 ST (NOR: ST CONT1)
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
MIF AF
INT C
REM 1 2
TX KEYED
DUMMY
TUNE
THROUGH
A
B
C
INH
Signal name
5-17
5.3 T-CPU board (05P0732)
Function
Used to generate latch signal
for U4 by NOR gate U12 with
ST CONT1 signal
Used to generate latch signal
for U5 by NOR gate U12 with
ST CONT 1 signal
Selects LINE-IN signal from
No.1 or No.2 FS-2570C, using
analog switch U8 (TX AF OUT
signal)
Selects LINE-IN signal from
No.1 or No.2 FS-2570C, using
analog switch U8 (LINE OUT
signal)
Controls External BK, isolated
with photocoupler U14, Driver
Q4 provided
Controls antenna coupler
Selects IA and TUNE OK
signals from the
using U6
coupler,