190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-30
5.5.2 J3552 44-Pin HD-DSub
Figure 5-16 J3552 Connector (Looking at Unit)
Table 5-8 J3552 Connector Pinout
Pin
Pin Name
I/O
Pin
Pin Name
I/O
1
RESERVED
--
23
RESERVED
--
2
RESERVED
--
24
RESERVED
--
3
RESERVED
--
25
RESERVED
--
4
RESERVED
--
26
RESERVED
--
5
MIC AUDIO IN HI
IN
27
COM REMOTE TRANSFER*
IN
6
RESERVED
--
28
COM REMOTE TUNE UP*
IN
7
500 OHM COM AUDIO HI
OUT
29
COM REMOTE TUNE DOWN*
IN
8
RESERVED
--
30
AIRCRAFT POWER
IN
9
RESERVED
--
31
GND
--
10
RESERVED
--
32
RESERVED
--
11
COM MIC KEY*
IN
33
RESERVED
--
12
RESERVED
--
34
RESERVED
--
13
RESERVED
--
35
RESERVED
--
14
RESERVED
--
36
RESERVED
--
15
RESERVED
--
37
AIRCRAFT GND
--
16
RESERVED
--
38
AIRCRAFT GND
--
17
RESERVED
--
39
RESERVED
--
18
500 OHM COM AUDIO LO
IN
40
AIRCRAFT GND
--
19
RESERVED
--
41
RESERVED
--
20
MIC AUDIO IN LO
IN
42
RESERVED
--
21
RESERVED
--
43
AIRCRAFT POWER
IN
22
RESERVED
--
44
AIRCRAFT POWER
IN
H
I
L
H
T
I
D
15
30
A
IRCRA
FT
G
R
O
UND
MI
C
A
UDI
O
IN
HI
GROUND
I
I
44
16
31
1
CO
M
RE
MO
TE
T
UNE
DO
W
N*
CO
M
MI
C
K
E
Y*
L
RESERVED
C
O
M
RE
M
O
TE
T
UNE
UP
*
U
500
OH
M
C
O
M
A
U
D
IO
LO
M
IC
A
U
D
IO
IN
L
O
CO
M
RE
MO
TE
T
RA
NS
FE
R
*
AI
R
C
R
A
FT
PO
W
ER
A
IRCRA
FT
G
R
O
UND
A
IRCRA
FT
G
R
O
UND
A
IRCRA
FT
PO
WE
R
A
IRCRA
FT
PO
WE
R
50
0
O
HM
CO
M
A
UDI
O
HI
