Kenwood TK-780 Service Manual Supplement page 24

TK-780/H
5. Connection Cable (KCT-29 : Option)
The KCT-29 connection cable kit is used to connect the
TK-780/780H transceiver to the KPG-1A Modem GPS Re-
ceiver or the KPG-1B Modem GPS Controller.
5-1. Installing the KCT-29 in the transceiver
1. Remove the upper cover from the transceiver.
2. Lift the DC cord bushing (
3. Remove the pad as shown in Figure 5 (
4. Insert the KCT-29 cable (
wire harness band (
5. Replace the DC cord bushing (
6. Connect the KCT-29 to the TX-RX unit (A/2) as shown in
Figure 6 ( ).
7
C
CN4
CN1
D
CN2
CN3
B
7
24
INSTALLATION
) from the chassis.
1
).
2
) into the chassis (
3 4
) must be inside the chassis.
5
).
6
1
2
Fig. 5
B
D
B
C
5
4
3
6
KCT-29
Fig. 6
6. Interface Cable (KCT-31 : Option)
The KCT-31 is a RS-232C interface cable for LMR mobile
radios, TK-780/780H.
The 9-pin (D-sub) connector is connected to an external
RS-232C terminal. The other end of the cable is connected
to the internal connector of LMR mobile radio.
Note : You cannot write a firmware with the KCT-31.
6-1. Features
). The • This KCT-31 has a RS-232C-TTL level interface circuit.
• This KCT-31 does not require an external power supply.
• This KCT-31 can be used up to 9600 bps.
• Compatible with an ER terminal of DTE that has the volt-
age 6V or more.
6-2. Terminal function (D-sub connector)
Pin No. I/O
1 I
2 I
3 O
4 O
5 –
6 I
7 O
8 I
9 –
A
Port name Function
CD Carrier detect
RD Receive data
SD Transmit data
ER Data terminal ready
SG Signal ground
DR Data set ready
RS Request to send
CS Clear to send
CI Ring indicator
5 1
9 6