Kenwood TK-2207 Service Manual page 51

P
TX-RX UNIT (X57-6870-20)
RX LO1
5T
5R
BPF
R:4.98V
L206
180n
MIXER
R220
Q204
560
3SK318
C238
12p
C243
R:2.48V
1000p
R:0.99V
CN201
PCTV
C334
0.1u
R:0.3V(MUTE ON)
DC SW
7.3V(MUTE OFF)
T:0.3V
Q304
R:7.52V
2SA1362(GR)
T:7.31V
R336
SP2
1k
R334
47k
Q303
DTC144EE
DC SW/SP MUTE
TXD
SB
PTTSW
AF_CONT
OPTDET
5M
Q
SCHEMATIC DIAGRAM / 原理图
Note : The components marked with a dot (
L113 L114 L115 C144
5T 3T
3T
82p
R:2.48V
C250 C253
C245 R227 R291
470p 0 0 4p 4.5p
(B)
(B)
D203,204
RF BPF TUNING
R343
470k
AF AMP
IC302
TA7368F
1
10
1 PoUT
2 9
VCC
PW-GND
3 8
3 PRE-GND
4 C338 100p
7
VIN PHASE
C339
5 6 R337
RIPPLE NF
100 10u6.3
C340
R:7.3V(MUTE ON) 0.1u
0.3V(MUTE OFF)
T:7.3V
R
ANT SW
D103
L117
7T
HVC131
D104 C151
C154
1000p 10p
HVC131
ANT SW
L110
ANT SW ANT SW
RF AMP
Q205
3SK318
R:4.8V R:4.92V
R231
C263
R239 R240
47
47 0
10p
R:0.75V
R:1.76V
SP MUTE SW
Q306
CPH3413
Q305
DTC144EE
DC SW/SP MUTE
R341 10k
R346 100
R344
1k
L301
S
TK-2207
●
) are parts of layer1.
L119
L118
7T 6T
C156 C159
12p 7p
C160
56n
33p
C267 C268
3p
3p
(B)
(B)
C271
11p
D205,206
RF BPF TUNING
C345
100u6.3
SP MUTE SW
Q316
CPH3413
R345
PTT/RXD
MIC
100
MICIN
OPTDET
5MS
AE
TXD
NC
SPO
SPI
T
1
ANT
CN13
2
3
4
5
6
J301
MIC301
7
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