Kenwood TK-760G Service Manual page 19

2. Accessory Terminal (TX-RX Unit)
2-1. External Connector Accessory Terminal Method
No. Name I/O
CN1 1 8C O DC 8V output
2 5S O DC 5V output
3 AUX5 O
4 AUX6 O
5 NC – Non-connection
6 AUX3 O SQ : Squelch detect output
7 AUX1 I PTT : External PTT input
8 AUX4 O
9 AUX2 I DTC : Data channel control/
External hook input
I CHDATA : Channel control
serial data input
10 ALT I Alert tone input
11 AFO O Receiver audio signal output
12 AFI I Receiver audio signal input
13 MII I Transmit audio signal input
14 MIO O Transmit audio signal output
15 GND – Ground
CN3 1 HOR O Horn alert/call output
2 E – Ground
3 SB O Switched B+, DC 13.2V
output, Maximum 1A
CN4 1 DEO O Receiver detector output
Level : 0.5Vrms
(Standard modulation)
2 DTC I Data channel control/
External hook input
3 IGN I Ignition sense input
4 DI I Data modulation input
5 ME – External microphone ground
6 MI I External microphone input
7 PTT I External PTT input, active low
8 SQ O Squelch detect output
CN5 1 AM I Speaker mute input, active high
2 MM I MIC mute input, active high
3 EMG I EMG : Foot switch input,
active low
CN7 1 PA/LI O Relay for PA function KAP-1
control
O PA/LI ON : High, PA/LI OFF : Low
2 SPO O Audio signal output to KAP-1
3 SPI I Audio signal input from KAP-1
CN8 1 SP O Audio signal output to
internal/external speaker
2 E – Ground
*1 : MDT mode
*2 : Emergency mode
INSTALLATION
Description Note
*1
*1
*2
TK-760G/
3. Ignition Sense Cable (KCT-18 : Option)
The KCT-18 is an optional cable for enabling the ignition
function. The ignition function lets you turn the power to the
transceiver on and off with the car ignition key.
If you use the Horn Alert function or the Manual Relay
function, you can turn the function off while driving with the
ignition key.
3-1. Connecting the KCT-18 to the Transceiver
1. Install the KCT-19 in the transceiver. (See the KCT-19
section.)
2. Insert the KCT-18 lead terminal (
square plug ( ) supplied with the KCT-19, then insert
1
the square plug into the KCT-19 connector (
KCT-19
Fig. 3
3-2. Modifying the Transceiver
Modify the transceiver as follows to turn the power or
the Horn Alert or Manual Relay function on and off with the
ignition key.
1. Remove the lower half of the transceiver case.
2. Set jumper resistors (0Ω) R134 and R135 of the TX-RX
unit (A/2) as shown in Table 1.
KCT-19
CN2
R133
R134
Fig. 4
( N ) /762G/
) into pin 3 of the
2
).
3
3
1
3
Contact
13
6
15
2
1
KCT-18
TX-RX UNIT
(A/2)
ANT
( N )
19