Kenwood TK-2402(V) Service Manual page 36

K
TK-2402(V)/2402/2406/2407
Do
50C
VLO
D4,D7
RX VCO tune
L3 L7 D7 C46
10u
68p
1SV325F
RX assist
D8
D3,D5,D8,D9
TX VCO
1SV323F
tune
L8 D9 C47
10u
82p
1SV323F
TX
assist
TASIS
5V
Speed up
TX/RX
50T
DICSW
19.2MHz
+B
PTT/RXD
APCSW
50R
VOLIN
MOD2
33M
5.0V
C736
1000p
IC704
BU7465HFV
DC AMP(BPF1 tune)
CP24
Freq
CVADJ
1kX2
IC703
7.4V 3.3V
MM1856A33N
1 VIN 5
VoUT
2 GND
3
4
CoNT
NC
Voltage regulator(33B)
TXD
50M
HSDENC
PTT/RXD1
MOD1
CML_IRQ
37
DVSS3
C735
38
VDEC2
XTAL/CLoCK 10u
39
XTAL/CLoCK
XTALN 40
XTALN
R744 L701
41
DVDD
15
SDATA_O_CML 42
CoMMANDDATA
SDATA_I_CML 43
REPLYDATA
C734
44
NC
10u
45
DVSS4
46
SERIALCLoCK
SCLK_CML
47
SYSCLoCK2
CML_CSN
48
CSN
SB
LSDO
DISCFB
WIDE/NARROW
50V
33M
36
X57-831 3/4
L
R:4.2V
T:0V
Buffer AMP
R37 Q9
2SC5636
22
RX-VCO
Q5
MCH3914(8)-H C72
33p
C68 R40
1p 150k
0.7V
TX-VCO
R38
Q6
MCH3914(7)-H 22
C66
0.5p
4.2V
MOD
R31
T/R VCO DC SW
330k
Q8
R:0V
SSM3J36TUT
T:4.2V
Q8 control
Q7
Q4
SSM6L36TU-F
KTC4075E(Y,GR)
L17
Ripple
R:0V
fillter
T:3.3V
0.7V
3.3V
R400
330k
Q400
KTC4080E-P
Doubler(2nd LO)
3.2V
C741 C401
10u 0.1u
C740
0.1u
C742
1000p
BPF1
MoD2
24
R766
MoD1
23
2.2k
AVSS1
22
MIC
21
MICFB
20
Baseband system ALTFB
19
IC705
ALT
18
CD686AQ3
DISCFB
17
DISC
16
GPIo2
15
DVSS2
14
SYSCLoCK1
13
R760
C743
0.01u
47k
C744 10u
C746
R757
47k
1000p
M
SCHEMATIC DIAGRAM
3.2V
C79 R:2.1V
T:2.0V
RF AMP
22p
T/R SW
Q10 3.0V
D15
2SC5636 L26 C81
C74
15n 18p
HSC277
15p
4.5V
T/R SW
5.0V
50C
3.5V
C407
39p
IF system
IC401
C404
L401
NJM2591V
100n
56p
16
1
oSCIN
MIXIN
2 15
oSCoUT
GND
3 14
MIXoUT
NoISEREC
CF401
4
13
V+
L72-0973-05
NoISEDET
C408 L79-1866-05
5
12
IFIN
CD400
RSSI
C411 C417
0.1u 6 11
DEC
IFoUT
0.1u 56p
7 10
FILoUT
R410
QUAD
R404
9
8
FILIN
1.8k
AFoUT
470k
R405 C412 R407
270k 3.3k
27p
W/N SW
R408
3.3k
W:3.3V
Q401
N:0V
LTC014EEBFS8
C756 C759
R768 R772
10k 1u 150k
1u
R761
0
R770 C758
180k
4.7u
C757
R769
100k
22u
N
TX-RX UNIT (X57-8310-10)
R210 R212
22 1.5k
C201
R202 C202 R257
0
1000p 47p 0
Pre-AMP
R:0V
T:1.8V Q201
2SC5455-A
C208
C207
39p 39p
R:0V
T:4.9V
R:4.9V
T:0.0V
R:4.9V
T:0V
R:0.6V
C422 XF400
R418
T:0V
L71-0683-05
10p 680k
38.85MHz
C426
R419 R420
470 470
0.01u
1st IF AMP
Q403
KTC4075E(Y,GR)
BUSY
RSSI
Q402 control
R773 C763
10k
0.1u
D700
KDR731
R784
MIC AGC AMP
C760
1k
Q705
0.47u
2SC4116(GR)F
C761
MIC AGC AMP
R785
0.47u
Q706
2.7k
D700,D701
D701 2SA1586(Y,GR)F
KDR731 AF detector(MIC)
D703
Limiter
MC2850
R786
100k
MIC mute SW
R787 1M
Q704
D702 47p
KTC4075E(Y,GR) C772
1SS372F
R774
C769
4
oUT
100
IN-
3
0.47u
VSS
2
5
AF detector
VDD
(VOX)
IN+
1
IC706
BU7465HFV
DC AMP(VOX)
3.3V
C774
1000p
O
R:0V
T:1.0V
C216
39p
50T
1LO
DICSW
+B
APCSW
PC
50R
C432
0.01u
PTT/RXD
SB
BPF1
33M
TXD
50M
PTT/RXD1
R789 C775
10k
0.1u
MIC
C777
R790
10k 0.068u
50V