Furuno FS-2570 - Page 134

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