GMA
340 Installation Manual
Page B
-13
(Page B
-14
blank)
190-
001
49
-01
Rev L
Figure B6. J1 INTERCONNECT WIRING DIAGRAM
COM 3 MIC
COM 3 KEY
COM 1 SPKR LOAD
COM 1 SPKR LOAD RETURN
COM 2 SPKR LOAD RETURN
ALT WRN RETURN
TEL RINGER RETURN
COM 3
Altitude Warning Audio
ADF 2 Radio
Telephone Audio
J1
Marker Beacon Antenna
EXT Indicator
PTT
25
26
9
10
11
12
27
28
13
14
15
30
23
24
3
4
5
6
17
18
19
20
21
22
7
8
31
32
44
43
35
34
33
41
40
42
36
37
38
39
1
2
16
29
(up
to
4
jacks,
wired
in
parallel)
1.
UNLESS
OT
HER
W
ISE
INDICAT
ED,
ALL
SHIELDS
M
U
S
T
BE
T
E
R
M
INA
T
E
D
A
T
T
HE
G
M
A
340
END
ONLY
.
2.
ALL
W
IRE
SIZE
SHOULD
BE
A
W
G
2
4
O
R
LARGER,
T
EFLON
INSULAT
ED,
E
X
CEP
T
FOR
T
H
E
FOLLO
W
ING:
J2
PINS
8,
9.
10
,
1
1
(A
W
G
2
2
,
T
EFLON
INSULA
TE
D)
J
2
P
IN
S
43
,
4
4
(A
W
G
2
2,
T
E
FL
O
N
IN
S
U
L
A
TED
)
3.
S
O
M
E
CO
M
M
U
N
ICAT
IO
N
T
R
A
NSC
EIVE
RS
R
E
Q
UIRE
T
H
E
IR
S
PEAK
E
R
O
U
T
P
U
T
TO
BE
LOADE
D
F
O
R
PROP
ER
OP
ERA
T
ION.
T
H
E
G
M
A
340
PROV
IDES
INT
E
RNAL
D
U
M
M
Y
L
O
ADS
F
O
R
T
H
IS
PUR
P
O
SE.
CONN
EC
T
O
NL
Y
IF
R
EQ
UIRED
.
R
E
FER
T
O
T
RANS
CEIV
ER
D
O
CU
M
E
NT
A
T
IO
N.
4.
CONNEC
T
L
IGH
T
ING
BUS
AS
SHO
W
N
IN
T
H
E
FOLLO
W
ING
T
ABLE:
VOL
TAGE
LO
W
SI
D
E
OF
B
U
S
28V
LIGHT
ING
J2 PIN
7
5.
ALL
HEADSET
,
M
ICROPH
ONE,
AND
M
U
SIC
PHONE
PLUGS
M
U
S
T
BE
ELECT
RICALL
Y
ISOLAT
E
D
FRO
M
GROU
ND.
T
H
IS
M
A
Y
R
E
Q
U
IRE
T
H
E
U
SE
O
F
INS
ULAT
IN
G
W
ASHE
RS
W
H
EN
M
O
U
N
T
IN
G
T
H
E
PHO
NE
PLUG
S.
ADDI
T
IONA
LL
Y
,
T
H
E
SPE
AKE
R
R
ETUR
N
M
U
S
T
B
E
ISOL
A
T
ED
FRO
M
GROU
ND
.
6.
PA
M
U
T
E
IS
AN
OU
T
P
U
T
FRO
M
T
HE
G
M
A
340
T
H
A
T
IS
PULLED
LO
W
W
H
E
N
ACT
IVE.
IT
IS
USED
T
O
TR
IG
G
E
R
T
H
E
M
U
TE
F
U
N
C
TI
O
N
O
N
A
N
E
X
T
E
R
N
A
L
P
A
S
YS
TE
M
.
7.
NO
R
M
ALL
Y
,
AN
Y
ICS
(INT
ERC
O
M
)
A
C
T
IVI
TY
W
ILL
CAUSE
T
H
E
M
USIC
SO
URCE
T
O
BE
M
U
T
E
D.
IF
T
H
IS
IS
NOT
D
ESIR
E
D
,
T
HE
N
J
2
P
IN
13
M
U
S
T
BE
C
O
N
N
EC
T
E
D
T
O
J
2
PIN
1
4
,
EIT
H
E
R
PERM
AN
E
N
T
L
Y
,
O
R
VIA
A
S
W
IT
CH.
8.
J
2
PIN
1
7
(8
OHM
SELECT*)
IS
ONLY
FOR
U
S
E
IN
INST
ALLAT
IONS
W
HERE
AN
8
O
HM
CABIN
SPEAKER
IS
INST
ALLED.
T
H
E
F
UNC
T
ION
ALLO
W
S
T
H
E
SAM
E
P
O
W
ER
T
O
BE
DELIVERED
T
O
AN
8
O
H
M
SPEAKER
AS
W
O
ULD
NORM
ALL
Y
B
E
DELIVERED
TO
A
4
OH
M
SPEAKER.
IF
AN
8
O
H
M
SPEAKER
IS
USED
AND
T
H
E
SPEAKER
VOLU
M
E
IS
ACCEP
T
ABLE,
T
H
EN
T
H
IS
PIN
SHOULD
BE
L
EFT
OPEN.
IF
AN
8
OHM
CA
BIN
SPEAKER
IS
USED,
BUT
M
ORE
SPEAKER
VOLU
ME
IS
DESIRED,
T
H
EN
J
2
PIN
1
7
M
UST
BE
T
IED
TO
GROU
ND
AN
D
T
H
E
SPE
AKER
V
O
L
U
M
E
SH
O
U
LD
BE
R
EADJU
ST
ED.
D
O
N
O
T
G
ROU
N
D
J
2
P
IN
17
IN
A
4
OH
M
C
ABIN
SPEAKER
INS
T
ALLAT
IO
N.
9.
J
2
PIN
1
9
(T
ONE
ENABLE*)
CAN
BE
LEFT
OPEN
O
R
T
IED
TO
G
R
OUND.
IF
T
IED
T
O
GROUN
D,
T
HEN
A
SHOR
T
AUD
IBLE
T
O
N
E
W
IL
L
BE
H
EAR
D
IN
T
H
E
PILO
T
AND
C
O
PIL
OT
H
E
A
DSE
T
S
EAC
H
T
IM
E
A
B
U
TTON
IS
PRE
SSED
.
IF
L
EF
T
O
PEN,
N
O
T
O
NE
IS
H
EARD
.
10.
U
S
E
C
O
A
X
M
EE
T
ING
T
H
E
APPLI
CABL
E
A
V
IAT
IO
N
R
E
G
ULA
T
IO
N
FOR
T
H
E
M
A
R
KE
R
BEA
CON
AN
T
ENNA
CABL
E.
W
H
E
N
RO
UT
IN
G
T
HE
M
A
R
KER
BEA
CO
N
A
NT
E
NNA
CABLE
,
AVO
ID
S
H
ARP
C
O
R
NERS
AND
ROUT
E
A
W
A
Y
FRO
M
H
IGH
CU
RREN
T
W
IRING
AND
ANY
TRAN
S
M
IT
T
E
R
A
N
T
E
NNA
CABLES
.
1
1
.
P
INS
3
1
A
N
D
3
2
O
F
J
1
ARE
UNS
W
IT
CHE
D,
U
N
M
U
T
E
D
IN
P
U
T
S.
PINS
4
3
A
N
D
4
4
O
F
J
1
A
RE
UNS
W
IT
C
H
E
D
INPUT
S.
1
2
.
J
2
P
IN
S
1
0
A
ND
1
1
S
H
OUL
D
B
E
C
O
NNEC
T
E
D
D
IREC
T
L
Y
T
O
THE
AIRFR
A
M
E
U
SING
MI
NI
M
U
M
W
IRE
LENG
T
H
.
340 DUAL ADF
NOTE
S PER
TAIN
ING T
O
J1 A
ND J2
FLT CTRL System
NAV 2 Radio
NAV 1 Radio
ADF 1 Radio
Transceiver
14V
LIGHT
ING
J2 PI
NS 6 A
ND 7
J2
PINS
5 AND
6
J2
PIN 5
HI
GH SI
DE OF
BUS
COM 1
Transceiver
COM 2
Transceiver
See note 14
MKR ANT
MKR ANT RETURN
MASQ INH
NC
EXT AMBER LAMP (M)
EXT BLUE LAMP (O)
EXT WHITE LAMP (A)
P
ASS
HEADSET RETURN
P
ASS
HEADSET R
P
ASS
HEADSET L
PILOT MIC KEY
PILOT MIC RETURN
PILOT MIC IN
TEL RINGER IN
MIDDLE MKR SENS
GND LUG
ALT WRN IN
ADF 1 RETURN
ADF 1 IN
ADF 2 RETURN
ADF 2 IN
NAV 1 RETURN
NAV 1 IN
NAV 2 RETURN
NAV 2 IN
COM 3 RETURN
COM 3 IN
COM 2 MIC
COM 2 KEY
COM 2 RETURN
COM 2 IN
COM 1 MIC
COM 1 KEY
COM 1 RETURN
COM 1 IN
COM 2 SPKR LOAD
COM 3 SPKR LOAD
COM 3 SPKR LOAD RETURN
See note 3
See note 3
See note 3
