Kenwood TK-785 Service Manual page 10

TK-785
4. 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.
4-1. 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
4-2. 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) R151 and R152 of the TX-RX
unit (A/2) as shown in Table 1.
Operation when KCT-18 is connected
KCT-18 cannot be connected
Power on/off and Horn Alert or
AUX-A on/off
Horn Alert or AUX-A on/off, Timed power off
Power cannot be turned on
Table 1 R151 and R152 setup chart
10
INSTALLATION
) into pin 3 of the
2
).
3
3
1
3
Contact
13
6
15
2
1
KCT-18
Fig. 5
R151 R152
Enable Enable
Disable Enable
Enable Disable
Disable Disable
R151
R152
KCT-19
CN7
Fig. 6
5. Optional Voice Scrambler Function
You can use the voice scrambler in the following two
configurations.
1. Assign this function to the Scrambler key by using the
programming software (KPG-62D).
When the Scrambler key is pressed, the ··· indicator
appears, and the optional (scrambler) function is enabled.
When the key is pressed again, the ··· indicator goes
off and the function is disabled.
2. Using the KPG-62D, you can set the voice scrambler to
be always active, without pressing a key. The operator
cannot switch off the voice scrambler.
5-1. Configuring a Scrambler Code
The scrambler code cannot be changed using the trans-
ceiver keys. Only one scrambler code can be set into the
transceiver. If you want to change the code, you must use
the KPG-62D to reconfigure the scrambler code.
5-2. Voice Scrambler Board Connection
• Modification
1. Remove the upper half of the case of the TK-785.
2. Remove R529 and R571 on the Control unit (X57-614 B/2
or X57-615 B/2).
TX-RX UNIT
(A/2)
ANT