TK-880/H (UHF) mobile service manual - The Repeater Builder's ...

INSTALLATION
TK-880/H
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.
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 ).
1. Bind the unused connecor to the cable with a retaining
band as shown.
When the COM1 is used.
When the COM2 is used.
C
A
Yellow
Yellow
B
Green
B
Green
1
Red
Red
2
Black
Black
A
C
Fig. 8
A B C
COM1 No Yes Yes
COM2 Yes Yes No
Fig. 7
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.
A
A
C
CN4
CN1
CN4
CN1
B
B
CN3 CN2
B
CN3 CN2
5
4
CN6
CN6
6
3
7
When the COM1 is used.
When the COM2 is used.
Fig. 9
Note :
· The modification must be applied to the TK-880/880H
transceivers with a serial number of 30200000 or smaller
when using a COM2 port. Replace the 47kΩ (R675) chip
resistor on the TX-RX unit (B/2) with a 4.7kΩ resistor.
· 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 details.
Original
New
47kΩ (RK73GB1J473J) → 4.7kΩ (RK73GB1J472J)
25