Kenwood KCT-31, Руководство по обслуживанию

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3
KCT-31
INSTALLATION/PARTS LIST/SCHEMATIC DIAGRAM
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
3
4
6
5
CN6
CN1
CN2
CN4
CN3
A
B
7
C
Fig. 2
Fig. 3
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.
Destination
KCT-31
Ref. No. Parts No.
Description Address
New
parts
KCT-31
!
C1 C92-0601-05 ELECTRO 10UF 16WV
C2 C92-0712-05 CHIP-TAN 22UF 6.3WV
D1 DAP202U DIODE
D2 MA2S111 DIODE
IC1 NJM78L05UA BI-POLAR IC
IC2 TC4S81F MOS IC
Q1 2SC4116(Y) TRANSISTOR
Q2 DTC114YUA TRANSISTOR
Q3 DTA144EUA TRANSISTOR
Q4 DTC114EUA TRANSISTOR
R1 RK73GB1J223J CHIP R 22K J 1/16W
R2 RK73GB1J392J CHIP R 3.9K J 1/16W
R3 RK73GB1J103J CHIP R 10K J 1/16W
R4 RK73GB1J473J CHIP R 47K J 1/16W
3. Remove the upper case of the transceiver and lift the DC
cable bushing (
➊
) from the chassis.
4. Remove the pad as shown in figure2 (
❷
).
5. Insert the KCT-31 cable (
❸
) into the chassis (
❹
).
The wire retaining band (
➎
) must be inside the chassis.
6. Replace the DC cable bushing (
❻
).
7. Connect the KCT-31 to the TX-RX unit (A/2) as shown in
figure 3 (
➐
).
8. Replace the upper case.
SG
CD
DR
RD
RS
SD
CS
ER
C I
9 5
6 1
IC1
NJM78L05UA
OUT IN
COM
1
2
3
3
2
1
TXD
CN1
RXD
SB
5V
VDD
OUT
IC2
TC4S81F
MA2S111
VSS
INA
INB
R4
47k
1 5
2
3 4
GND
4
Q1
2SC4116(Y)
10
µ
16
C1 +
D1
DAP202U
Q2
DTC114YUA
R2
3.9k
Q3
DTA144EUA
Q4
DTC114EUA
22
µ
6.3
C2
R1
22k
R3 D2
10k
SCHEMATIC DIAGRAM
Note:
The above modification has already been applied to the TK-
780/TK-880 transceivers with a serial number of 30200001 or
greater.
When using a COM2 port, replace the 47 k
Ω
(R675) chip
resistor on the TX-RX unit B/2 with a 4.7 k
Ω
resistor.
Original New
47k
Ω
(RK73GB1J473J)
=
4.7k
Ω
(RK73GB1J472J)