Garmin GNC 420 Maintenance Manual page 154

GPS RS232 IN4
GPS RS232 OUT1
GPS RS232 IN1
GPS RS232 OUT2
GPS RS232 IN2
ALTITUDE COMMON (Ground)
ALTITUDE C4
ALTITUDE C2
ALTITUDE C1
ALTITUDE B4
ALTITUDE B2
ALTITUDE B1
ALTITUDE A4
ALTITUDE A2
ALTITUDE A1
ALTITUDE D4
OBS MODE SELECT
SPARE INPUT B
CDI SOURCE SELECT
SPARE INPUT A
DEMO MODE SELECT
TEST MODE SELECT
GROUND
GROUND
B.3.2 J8
Page B-4
Rev. C
Table B-3. J1 Descriptions (continued)
Table B-4. J8 Descriptions
Pin Name Pin #
VCC 1
VCC 2
GND 3
33MHZ 4
GND 5
IF 6
RSSI 7
TRAP 8
55 I
56 O
57 I
58 O
59 I
60 O
61 I
62 I
63 I
64 I
65 I
66 I
67 I
68 I
69 I
70 I
71 I
72 I
73 I
74 I
75 I
76 I
77 O
78 O
I/O
O
O
O
I
O
I
I
O
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05