Kenwood TK-2302 Service Manual page 37

P
TX-RX UNIT (X57-7570-20)
L108 L109
3T 5T
5T
5R
BPF
R:4.82V
L206
Q203
3SK318
180n
MIXER
C236
R:0.94V R:2.41V
R216
1000p
560
PCTV
SB
R:0.25V(MUTE ON)
R:7.73V
7.55V(MUTE OFF)
DC SW
T:9.2V T:0.35V
Q313
2SB1694
R377
47k
R:7.7V(MUTE ON)
0.16V(MUTE OFF)
T:-1.45V
Q312
RT1N441U
DC SW
MIC
PTT
OPTDET
TXD
5M
AF_CONT
SB
Note : The components marked with a dot (
Q
SCHEMATIC DIAGRAM
ANT SW
C145
L110 D103
7T
HSC277
82p
L210
R:2.41V
C238 R220 R222 R223 C247 C249
56 0 0 3p 2.5p
1000p
(B)
R380
470k
1
2
3
C396 R379
4
0.1u 1k 5
•
) are parts of layer 1.
R
TK-2302/2302
L113 L114 L116
7T 7T 6T
C150
C153 C155 C158
1000p 10p 12p 7p(B)
L112
8T
ANT SW
Q204
LOW NOISE AMP
R:4.7V
R:4.8V
R225
R:1.7V
47 C257
(B)
39p
Q204
3SK318
R:0.73V
D202,203
RF BPF TUNING
AUDIO AMP
MUTE SW
IC309
TA7368FG
Q315
10 2SK3577-A
NC1
PoUT
9
VCC
PW-GND
8
NC2
PRE-GND
C399
7
VIN
PHASE
6
R381 100p
RIPPLE
NF
150
C400
10u
GND
C402
0.1u
Q314
RT1N441U
MUTE SW
GND
R388
100
CP304
RK75HA1J102J
R385
100
S
V
(
L115
12n
ANT SW
C260 C262
R229
10 4p 4p
(B) (B)
C265
R230
30p
PCTV
D204,205
RF BPF TUNING
SB
C404
100u6.3
MUTE SW
Q316
2SK3577-A
PTT/RXD
OPTDET
T
/2306
)
1
CN13
ANT
2
3
0 4
5
6
J301
MIC
MICIN
5M
AE
TXD
NC
SPO
SPI
MIC301
7
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