Kenwood TK-980 Service Manual page 21

F
TX-RX UNIT : TX-RX SECTION(X57-6520-XX) (A/2)
A1 X58-4530-XX SUB UNIT
C115
3p
DOUBLER
Q102
2SC4226-A(R24)
VCO
Q101
R113 C118 2SK508NV(K52)
47 0.75p
CV
8CL
HT
EC
MB
W/N
T/R
MO
TO
BEEP
PSW
AFO
IGN
SB
8C
KEY
CK
DT
RSSI
5C
ES
EN
APTT
8.02V
OE
R14
47k
5
6
7
R408 8
0
DI
HOR
5V AVR
IC9
5.09V
TA78L05FF
R70
3
1 OUT
IN
0 COM
2
5C
SQ
AHK
LOK
IGN
X58-4530-XX C101 C104 C105
-10 TK-980 8p 1.5p 6p
-11 TK-981 4.5p 1P 4p
G
SCHEMATIC DIAGRAM
C109
3p
VCO MODULATION
C113
C101
L103 D101
22n 1SV283F
D100,101
VCO CONTROL
R39 100 IC4
SWITCH
TC4S66F-F
5
1 VDD
4.34V 2
4
3
VSS
C29 R33
4
470k
3 10u10
2
1
IC3
TA75W558FU-F
C31
AMPLIFIER
10u10
Q4-6
R58
DC SW
1k
Q6 LTC014EEBFS8
LTC014EEBFS8
Q4
DTD114EK
C107 C113 C114 L102 L105 L106
0.5p 4p 1000p 12n 39n 27n
5p 470p 10n 18n 15n
0.75p
H
R103
0
C104 R114
CN100
1
0
E
Q100
2SC4226-A(R24)
HT
BUFFER AMP
E
NC
8CL
MD
CV
R102
7
1k
R101
0
L100
R100
1.5u 0
CV
8CL
HT
EC
MB
W/N
T/R
MO
TO
BEEP
PSW
AFO
IGN
SB
8C
KEY
CK
DT
RSSI
5C
ES
EN
APTT
OE
AF SW
Q1
2SK1824-A
R17
0
C36
R44
150k 10u10
5.09V
R37
0
Q5
R50
10k
X57-6520-XX (A/2)
-12
-13
I
TK-980/981
TP1
BUFFER AMP.
Q7
2SC4226-A(R24)
R87 C55
0 3p
C175
5.01V
100p
8.02V
R:0V
T:4.86V
RX MUTE
Q18
2SK1824
AF SW
Q32
C107 2SK1824-A
10u10
D/A CONVERT
IC5
M62363FP-F
24
1
VIN1 VIN8
2 23
VOUT1 VOUT8
3 22
VOUT2 VOUT7
4 21
VIN2 VIN7
5 20
IC17
VDD GND
TC75SS1FE(F)
19
6
LD RESET
18
7 4
oUT
CLK VDAref
17
8
DI DO VSS
9 16 5
VIN3 VIN6
VDD
10 15
VOUT3 VOUT6
11 14
VOUT4 VOUT5
13
12
VIN4 VIN5
A1 R118 R184 C100
TK-980 X58-4530-10 3.9k 0 10u10
TK-981 X58-4530-11 NO NO NO
X57-652(A/2) 2/4
J
C59 C62
3p 3p
Q33
LTC044EEBFS8
DC SW
8C
KEY
T/R
R:4.81V
T:0V
R S I S
R121
4.7k
DM
POR
SB
W/N
IGN
OE
ES
DT
CK
5C
C51
100p
R42
3
IN-
33k
2
1
IN+
SQ
AHK
LOK
IGN
HNC
PSW
BPO
C170 C184
7p(B) NO
5p 10u
21