21
TK-980/981
INSTALLATION
Red
Black
Yellow
Green
A
B
C
A
B
C
COM1
No
Yes
Yes
COM2
Yes
Yes
No
2. Make sure the unit’s power is turned off.
3. Remove the upper case of the transceiver and lift the DC
cable bushing (
1
) from the chassis.
4. Remove the pad as shown in Figure 8 (
2
).
5. Insert the KCT-31 cable (
3
) into the chassis (
4
).
The write retaining band (
5
) must be inside the chassis.
6. Replace the DC cable bushing (
6
).
7. Connect the KCT-31 to the TX-RX unit (A/2) as shown in
Figure 9 (
7
).
8. Replace the upper case.
1
2
A
B
3
4
6
5
CN6
CN1
CN2
CN4
CN3
A
B
7
CN6
CN1
CN2
CN4
CN3
B
C
When the COM2 is used.
When the COM1 is used.
6-3. Installing the KCT-31 in the transceiver
Note :
When the COM1 is used, A connector is unused.
When the COM2 is used, C connector is unused.
1. Bind the unused connecor to the cable with a retaining
band as shown.
When the COM1 is used.
When the COM2 is used.
Red
Black
Yellow
Green
A
B
C
Fig. 7
Fig. 8
Fig. 9
Note :
·
The modification must be applied to the TK-980/981
transceivers with a serial number of 30600000 or smaller
when using a COM2 port. Replace the 47k
Ω
(R675) chip
resistor on the TX-RX unit (B/2) with a 4.7k
Ω
resistor.
Original
New
47k
Ω
(RK73GB1J473J)
→
4.7k
Ω
(RK73GB1J472J)
·
Enable the serial port function on the terminal.
·
Refer to the service manual of each radio or the help file
that came with the FPU (Field Programming Unit) for de-
tails.
