Installation - Kenwood TK-780 Service Manual

1. Accessory Connection Cable
(KCT-19 : Option)
The KCT-19 is an accessory connection cable for con-
necting external equipment. The connector has 15 pins and
the necessary signal lines are selected for use.
1-1. Installing the KCT-19 in the transceiver
1. Remove the upper and lower halves of the transceiver
case, and lift the DC cord bushing (
2. Remove the pad as shown in Figure 1 (
3. Insert the KCT-19 cable (
The wire harness band (
4. Replace the DC cord bushing (
5. Connect the KCT-19 to the TX-RX unit (A/2) as shown in
Figure 2 ( ).
7
6. Connect the KCT-19 to the external accessory by insert-
ing the crimp terminal (
both of which are supplied with the KCT-19.
Fig. 1
D
CN4
E CN1
CN2
CN3
B
C
CN6
7
Fig. 2

INSTALLATION

) from the chassis.
1
).
2
) into the chassis ( ).
3 4
) must be inside the chassis.
5
).
6
) into the square plug (
9
8
1
2
E
C
B
B
D
5
4
3
A
6
13
15
Crimp terminal
(E23-0613-05)
1-2. KCT-19 Accessory Port Function
No. (A) No. (B,C,D,E) Name
1 D-2 AHK
2 D-5 ME
AM
3 D-3 IGN
4 D-1 DEO
5 D-6 MI
TXS
6 B-2 E
7 B-3 SB
8 D-7 PTT
),
9 D-4 DI
10 B-1 HOR
11 D-8 SQ
12 C-1 SP
13 E-1 CN2 LOK
and
CN4
CN2 AM
14 E-2 CN4 RXD
CN2 MM
15 E-3 CN4 TXD
CN2 DTC
*1
LOK
TXS
FSW
Note
*1 : The functions of A-2, A-5, A-13 (when connector E is connected
to CN2), and A-15 (when connector E is connected to CN2) are
changed as described in the jumper chart.
*2 : The functions of A-13, A-14 and A-15 are changed if the con-
nector E is connected to CN2 or CN4 of the radio.
No.
E-1
E-2
E-3
· Connect CN6 of the radio to connector C of the KCT-19 instead of
to the internal speaker connector, if use external speaker.
9
Square plug
(E09-1571-05)
1
3
Contact
12
8
TK-780
Function
External hook input
Microphone ground
Speaker audio mute input
Ignition sense input
Receiver detector output
External microphone input
Transmitter sense output
Ground
Switched B+, DC 13.2V output.
Maximum 0.75A
External PTT input, active low.
During DTC is low, it works as
DATA PTT.
Data modulation input
Horn alert/call output
Squelch detect output, active low.
Speaker audio output.
TX logic signal output, active low.
Speaker mute input.
Serial control data input
MIC mute input, active high.
Serial control data output.
Data control channel signal input,
Data channel : Low
TX logic signal output, active low.
Transmitter sense output,
Active high
Foot switch input, active low
CN2 CN4
LOK/AM LOK
MM RXD
LOK/DTC/TXS/FSW TXD
Note
*1
*1
*1
*2
*2
*2
19