Garmin GNC 420 Maintenance Manual page 152

Table B-2. Internal and External Connections (continued)
INVERTER BOARD
GPS MODULE ( ALL UNITS)
INTERFACE BOARD
DISPLAY MODULE
DATA BASE CARDS
MAP BOARD
MOMENTARY PUSH BD (ALL
UNITS)
MOMENTARY PUSH BD (GNS
430 ONLY)
B.3 MAIN BOARD CONNECTORS
B.3.1 J1
VLOC ANNUNCIATE
GPS ANNUNCIATE
WAYPOINT ANNUNCIATE
TERMINAL ANNUNCIATE (ANNUNCIATOR A)
APPROACH ANNUNCIATE (ANNUNCIATOR B)
MESSAGE ANNUNCIATE
OBS ANNUNCIATE
AUTO ANNUNCIATE
INTEGRITY ANNUNCIATE (ANNUNCIATOR C)
ANNUNCIATOR D
ANNUNCIATOR E
ALTITUDE ALARM ANNUNCIATE
ANNUNCIATOR F
ILS/GPS APPROACH
RESERVED
TIME MARK OUT
MAIN LATERAL SUPERFLAG
MAIN VERTICAL SUPERFLAG
AIRCRAFT POWER
Page B-2
Rev. C
J13
J26
J27
J101
J3
J19
J20
J21
J22
-----
P16
J15 RIGHT
J15 LEFT
Table B-3. J1 Descriptions
Pin Name
Main Board
Display Module CCTF
Display Module Heater
Main Board
Antenna In
Data Card Flex
Left Data Card
Right Data Card
LCD Flex
Interface Board
Main Board
Data Card Flex
Data Card Flex
Pin # I/O
1 O
2 O
3 O
4 O
5 O
6 O
7 O
8 O
9 O
10 O
11 O
12 O
13 O
14 O
15 NA
16 O
17 O
18 O
19 I
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05