Garmin GNC 420 Maintenance Manual page 164

B.5.2 J10
Pin # Pin Name
1 +12VDC
2 +5VDC
3 GND
4 -12VDC
5 VLOC SERIAL IN
6 KEY
7 G/S SERIAL IN
8 G/S SERIAL OUT
9 NAV VOL
CONTROL
10 VLOC SERIAL
OUT
B.5.3 J24
Pin # Pin Name
1 +12VDC
2 +5VDC
3 GND
4 -12VDC
5 G/S IF AGC
6 NOT USED
7 G/S SERIAL IN
8 G/S SERIAL OUT
9 G/S + FLAG
10 G/S + UP
11 G/S -
[COMMON]
12 G/S
SUPER FLAG
OUT
13 KEY
14 G/S RF AGC
15 SPARE
16 KEY
Page B-14
Rev. C
Table B-15. J10 Descriptions
I/O
I
I
I
I
I Serial input from the Main CPU board to the NAV Board.
- This pin is not used.
I Serial input from the Main CPU board to the G/S board.
O This is an asynchronous serial output from the G/S board to the Main CPU
board.
I This is a dc input in the range between 0 and 5 volts coming through the
Main CPU board from the NAV volume control pot mounted on the bezel.
O This is a asynchronous serial output to the Main CPU board from the NAV
Board.
Table B-16. J24 Descriptions
I/O
O
O
O Ground.
O
I Glideslope board IF AGC output.
I
O Serial output to the G/S board from Main Board.
I Serial input from the G/S board to the Main Board
I Input from the G/S board.
I Input from the G/S board.
I The G/S board COMMON, or G/S -, input. Reference for the G/S + UP and
G/S + FLAG.
I G/S board superflag input. (Output on the G/S board is an open collector
output. The G/S superflag will be active (low) when the flag is out of view.)
-
I Not Used.
- SPARE
-
Description
Description
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05