Kenwood TK-3301 Service Manual page 31

P
TX-RX UNIT (X57-7772-70)
STRIP LINE
5T
5R
BPF
R:4.84V
L204
Q203
3SK318
180n
MIXER
C231
R:0.26V R:1.72V
470p
R215
820
SB
DC SW
Q313
2SB1694
AFVOLOUT
R377
47k
MIC
C369
0.1u
D308,309
RECTIFICATION
C370
0.1u
PTT
OPTDET
TXD
MIC_MUTE
5M SB
AF_CONT
5M
SB
Note : The components marked with a dot (
Q
SCHEMATIC DIAGRAM
C166
R137
0 6p
CN2
5T
R:4.85V
T:0.01V
R:1.70V
C234 C245
R220 R230 R231
0 0 0
470p 1p
R:0.3V(MUTE ON)
7.48(MUTE OFF)
T:0.3V
C396
R379
1k
0.1u
R:7.49V(MUTE ON)
0.15V(MUTE OFF)
T:7.36V
DC SW
Q312
RT1N441U
C383
0.1u
D308 R370
KDR731
1k
D309
KDR731
R371
2.7k
Q308
KTC4075E(Y,GR)
RECTIFICATION
•
) are parts of layer 1.
R
C173
ANT SW 0.5p
D103 C170
L113
4T
HSC277 100p
L112
4T
ANT SW
R:4.85V
L208
R:4.36V
R:4.8V
C247 C250
R222
120
1p 470p
Q204
3SK318
R:0.61V
Q204
LOW NOISE AMP
R380
470k
AUDIO AMP
IC309
TA7368FG
1 10
NC1
PoUT
9
2
VCC
PW-GND
8
3
NC2
PRE-GND
4 7
C399 100p
VIN
PHASE
6
5
RIPPLE
NF
R381
C400
150
10u
C402
0.1u
MIC
C392 L305
R374
15k
0.047u
Q310
2SC4116(GR)F
MIC MUTE
MIC MUTE
Q311
2SA1586(Y,GR)F
S
TK-3301
C175 C177
2p 2.5p
L114 L115
4T 4T
R140
0
ANT SW
R:1.69V
C256 C259 C261
R226
0 2.5p 4.5p
470p
C264
3.5p
SB
MUTE SW
Q315
2SK3577-A
C404
100u6.3
MUTE SW
Q316
2SK3577-A
MUTE SW
Q314
RT1N441U
R388
100
CP304
RK75HA1J102J
R385
100
T
1
ANT
2
3
C266
4
5p
5
J301
PTT/RXD
6
MIC
MICIN
OPTDET
5M
AE
TXD
NC
SPO
SPI
MIC301
7
31
X57-777 4/4