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INSTALLATION/PARTS LIST/SCHEMATIC DIAGRAM
3. Remove the upper case of the transceiver and lift the DC
cable bushing ( ) from the chassis.
4. Remove the pad as shown in figure2 ( ).
Fig. 2
5. Insert the KCT-31 cable ( ) into the chassis ( ).
The wire retaining band ( ) must be inside the chassis.
6. Replace the DC cable bushing ( ).
7. Connect the KCT-31 to the TX-RX unit (A/2) as shown in
figure 3 ( ).
8. Replace the upper case.
A
CN4
CN1
C
CN2
CN3
B
CN6
7
Fig. 3
When using a COM2 port, replace the 47 kΩ (R675) chip
resistor on the TX-RX unit B/2 with a 4.7 kΩ resistor.
Original
=
47kΩ (RK73GB1J473J)
Note:
The above modification has already been applied to the TK-
780/TK-880 transceivers with a serial number of 30200001 or
greater.
Note:
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.
1
2
A
B
5
4
3
6
New
4.7kΩ (RK73GB1J472J)
PARTS LIST
∗ New Parts.
!
indicates safety critical components.
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
KCT-31
New
Ref. No.
Address
Parts No.
parts
KCT-31
C1
C92-0601-05
C2
C92-0712-05
D1
DAP202U
D2
MA2S111
IC1
NJM78L05UA
IC2
TC4S81F
Q1
2SC4116(Y)
Q2
DTC114YUA
Q3
DTA144EUA
Q4
DTC114EUA
R1
RK73GB1J223J
R2
RK73GB1J392J
R3
RK73GB1J103J
R4
RK73GB1J473J
SCHEMATIC DIAGRAM
9
5
SG
C I
ER
D1
DAP202U
CS
SD
RS
RD
DR
Q1
CD
2SC4116(Y)
R1
6
1
22k
KCT-31
Description
Destination
ELECTRO 10UF 16WV
CHIP-TAN 22UF 6.3WV
DIODE
DIODE
BI-POLAR IC
MOS IC
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
CHIP R
22K
J
1/16W
CHIP R
3.9K J
1/16W
CHIP R
10K
J
1/16W
CHIP R
47K
J
1/16W
Q3
DTA144EUA
Q4
DTC114EUA
CN1
TXD
1
RXD
Q2
2
DTC114YUA
IC1
GND
NJM78L05UA
3
3
OUT
IN
SB
1
4
R4
2
5V
47k
1
5
INB
VDD
2
INA
3
4
VSS
OUT
IC2
TC4S81F
3
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