Kenwood TK-980 Service Manual page 23

1
R247
39
B
R103
22k
IC13
NJM2904E-ZB
1 8
AOUT +V
2
7
A-IN BOUT
3 6
B-IN
A+IN
C87 4
5
-V B+IN
100p
DC AMP
8T
8.02V
8C
KEY
8R
TP2
L231
C213 R212
5.6
1p
8R
PC
SB
5C
IGN
D20
4.58V
1SS355
REVERSE
CURRENT
PREVENTION
13.32V
DC SW
DC SW
Q22
LTC014EEBFS8
Q25
LTA014EEBFS8
DC SW
Q26
LTA014EEBFS8
13.20V
IGN
TOF
R134 47k
PSW
PA
X57-6520-XX (A/2)
IC400
-12 TK-980 RA20H8087M
-13 TK-981 RA20H8994M
Note : The components marked with a dot (
SCHEMATIC DIAGRAM
IC400
POWER MODULE
2 3 4
R:13.58V
T:12.46V
CURRENT
DETECTOR SW
Q20
LTA044EUBFS8
PRE CURRENT
R104
DETECTOR SW
R122
47k Q21
LTC044EUBFS8
2.7k
R112
4.7k
RF AMP.
Q201
2SC4094(R37)
C212
5p
R:0.78V
T:0V
LIMITER
EXCESSIVE
INPUT
PROTECTION
HSM88AS-E
5.09V
5.03V 13.58V
R128 R152
22k 0
D21
UDZW5.6(B)
D26,31
REVERSE 13.03V
VOLTAGE
CURRENT
REFERENCE
D26
PREVENTION
1SS355
ON :0V
OFF:13.40V
1 14
R144
Q1 VDD
22k
2 13
Q1 Q2
3 12
CLK1 Q2
4 11
R1 CLK2
5 10
D1 R2
6 9
S1 D2
7 8
VSS S2
IC15
TC4013BF(N)-F
POWER SUPPLY LOGIC
CIRCUIT CONTROL
13.30V
L206 L223
L222 L230
8.2n L34-1307-05
L34-1307-05 L79-1910-05 L79-1910-05
6.8n L34-1313-05
L34-1313-05 L79-1911-05 L79-1911-05
•
) are parts of layer 1.
TX-RX UNIT : TX-RX SECTION(X57-6520-XX) (A/2)
C267
L229
2T
47p
R183
0.22 2
R127
0.22 2
R:-0.37V
T:7.82V
DC SW
Q34
2SC2712-F(GR)
R:7.27V
T:0V
L230
L208
C209 C207
4.7n
100p 100p
5V AVR
D200
IC12
TA78L05FF
1 3
OUT IN
COM
9V AVR
2
R:13.56V
C142 470p
T:12.91V
SB SW
R151
Q27
0
2SA1641(S,T)
12.82V
R143
1k
R153
Q28
Q30
RT1N141U-T111
LTA014EEBFS8
DC SW
DC SW
0V
Q31
LTC014EEBFS8
DC SW
R248 R249 C176 C178 C179
L231
120(1/2w) 120(1/2w) 47p
47p NO
150(1/2w) 150(1/2w) 100p NO 100p
TK-980/981
C268 L221
3.5T
D208 C269
L709CER-T 10p
RF SW
L223 L222
D209,210
RF SW
IC14
8.02V
8V AVR
KIA7808API
2 OUT 1
IN
GND
3
13.55V
13.58V
D32
SURGE ABSORPTION
D37
REVERSE PROTECTION
R106 1
C89 0
470p
3
0
R109
0
C210 C255 C266 C268 C273
4p 10p 3p 47p 3p
3p 4p 1p 1p 2p
X57-652(A/2) 4/4
1
ANT
2
3
4
5
DC 13.6V
CN5
PA
SPO
SPI
6
J1
EXT.SP
CN6
SP
E
7
23