Kenwood TK-2402(V) Service Manual page 37

P
SCHEMATIC DIAGRAM
TX-RX UNIT (X57-8310-10)
Drive AMP
Q206
RD01MUS1-T113
R217 C219 L207
39n
12
30p
H:2.2V
L:1.3V
H:3.7V
L:2.2V
50T
R223
Dischage SW
560
Q203
LTC014TEBFS8
Over voltage protection
1LO
DICSW
+B
APCSW
PC
L407
L405
56n 56n
C436 C439
2p 3p
BPF
50R
L406
220n
R423
1st mixer
2.2k
Q404
R:3.2V
C437 3SK318
T:0V
16p
C444
1000p
PTT/RXD
SB
BPF1
VOLOUT
33M
TXD
50M
PTT/RXD1
DC SW(IC709 SB)
OPTDET
High &
Mute Off:3.3V
Q715 control
Mute On:0V
Q711
LTC014EEBFS8
MIC
DC SW
(IC707 SB)
1
Q710 NC1
OPTDET 2SB1694
2
VCC
Low &
Mute Off:7.4V
3
NC2
Mute On:0V
4
VIN
C781 R794
5
RIPPLE
0.1u 1.5k
Q710 control
OPTDET
Q709
Low &
LTC014EEBFS8
Mute Off:3.3V
AF power AMP(EXT)
Mute On:0V
50V
Q
TK-2402(V)/2402/2406/2407
Final AMP
Q208
RD07MUS2BT112
C228 R240
68p 4.7
H:1.4V
L:0.8V
R235
1.8k
R237
150k
R238
150k
R:0V
APC control SW
Q205
KTK5132E-P
R:3.3V
T:0V
R:4.9V
T:0.0V
50R
C456
C447 C484 C450 C452
R429
0
1000p 8p 1000p 1000p
4p
R:3.2V
T:0V
D401,D402
RX BPF
tuning
Q714
2SB1132(Q,R)
R792
Q714 control 470
Q715
UMG3N
OPTDET Low &
Mute Off:3.2V
Mute On:0V
AF SW(EXT SP)
AF SW(EXT SP)
R802
Q713 Q716
470k
2SK3577-A 2SK3577-A
PoUT
10
PW-GND
9
PRE-GND
8
C789
PHASE
7
100p
Pop noise mute control
NF
6
IC707
TA7368PL
Q712
LTC044EEBFS8
C787
0.1u
R
L222 L223 C264 C268
L221 R250
0
1000p 1000p
R:0V
T:4.9V
50T
R242 R243
470k 10k
DC SW(Power control)
C236
R246
Q210
10p
1
AoUT
470k LTA044EEBFS8
V+
8
2
A-IN
BoUT
7
3
A+IN
B-IN
6
4
GND
B+IN
5
IC200
NJM12904RB1
DC AMP(APC)
7.5V
DC SW(APC)
Q207 DC SW(Power control)
LTC014EEBFS8
SSM3K15AFS-F
L412
RX RF AMP R:4.2V
T:0.0V
Q405
3SK293-F
C458 C461 R434
0
1000p
4p R440
0
R:3.0V
T:0V
OPTDET High &
Mute Off:5.5V
Mute On:0V
INTSPMT
1
2
3
C786
R800
18k
0.22u
33M
MIC
OPTDET
OPTDET
without 2-pin Jack:3.2V(High)
insert 2-pin Jack:0V(Low)
50M
5.0V
C808
47u
C809
47u
Q703
UPA672T-A
Q707
Level shift(TXD)
UPA672T-A
Level SW(RXD)
S
D203,D204
ANT SW
D203 C272
L218 L219
1000p
HVC131
C274
C276
D204
16p 6p
HVC131
R:0V
T:0.8V
R252
0
D201,D202
ANT SW
Q209
C474 C478 C481
R448
0
8p 33p
4p
D403,D404
C469
RX BPF tuning
12p
OPTDET High &
Mute Off:3.3V
Mute On:0V
OPTDET High &
Mute Off:2.7V
Mute On:0V
AF power AMP
OPTDET High &
(INT)
Mute Off:2.7V
C791
IC709 Mute On:0V
NJU7089KV1
0.1u
IC708 1
SD
BU7465HFV oUTB
8
2
BYPASS
GND 7
5
C795
IN+
3 +IN
VDD
V+
6
VSS 1u
4
-IN
4 oUTA
IN- 5
OPTDET High &
oUT
Mute Off:5.5V
Mute On:0V
AF AMP
R813
C792 100p
68k
C794 R809
R804
120k
10k
0.1u
PTT/RXD
R816
1k
R814
27k
TXD
R815
TXD_OUT
100
DC SW(EXT-PTT)
Q708
LTC014EEBFS8
5.0V
T
1
ANT
L220
C279
7p
2
3
C810
24p
4
L420
22n
INT-SP
5
J601
EXT-SP/MIC
PTT/RXD
MICIN
MICO
OPTDET
50V
AE
TXD
NC
NC
SPO
INT-MIC
6
7
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