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Kenwood Manuals
Transceiver
TK-2312
Service manual
Kenwood TK-2312 Service Manual page 40
Vhf fm transceiver
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:
Instruction manual
(39 pages)
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Instruction manual
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K
TK-2312/2317
THDET
AFCONT
CVIN
BATT
PL_STB
PL_DAT
PL_CLK
PL_UL
TC X O
1
V C o N T
V C C
2
o U T P U T
G N D
X 1
1 6 . 8 M H z
L 7 7 - 3 0 5 0 - 0 5
1.6V
33M
R 9 8
1 8 k
C 98
1 0 0 0 p
4
o U T
3.3V
5
V D D
I C 3
T C 7 5 S 5 1 F E ( F )
DCSW
TX/RX
APCSW
AVR
7.4V
L 8 0 3
1
2
3
50M
BEAT SH I FT
BSHIFT
ON:3.3V
OFF: 0V
33MS
TXD
UCLK
50C
VOLIN
Q 8 0 6
2 S C 4 9 1 9 - S
B E AT S H I F T S W
CM_DTO
CM_DTI
7.4V
CM_CLK
50VC
CM_CSN
ON:3.3V
CM_IRQ
50VC
AVR
X C 6 2 0 9 B 5 0 2 P R
I C 8 0 3
4 V I N
5.0V
5 Vo U T
TXD
50T
50R
LSDO1
ASSIST
HSDENC
QT/DQT
VOX
RSSI
HSDIN
33M
MICMT
WID/NAR
PTT/RXD1
SB
EMPTT
EMPTT
BUSY
PTT/RXD
OPTDET
VOLOUT
B
40
X57-788 3/6
L
SCHEMATIC DIAGRAM
C P 1
100x4
3.3V
7 LD
R 5
R9
8 PDN2
4
1 0 k
1 0 0
R 11
9 PDN1
1 0 k
REFIN
1 0
3
TEST2
11
L 1
R8
C 11
TEST3
1 2
4 . 7 u
3 3 0
0 . 0 1 u
33MS
R99
R 1
Freq
I N +
3
0
1 8 k
V S S
2
MOD1
I N -
1
R 6
R7
0
1 0 k
I C 8 0 6
X C 6 2 0 9 B 3 3 2 M R
3.3V
3 3 B
V I N
Vo U T
5
V S S
CE
NC
4
L 7 8 - 1 4 3 4 - 0 5
1 9 . 2 0 0 M H z
37
DVSS3
3 8
VDEC2
3 9
X 8 0 2
XTAL/CLoCK
4 0
XTALN
41
DVDD
R879 0
42
CoMMANDDATA
R 8 8 0
43
REPLYDATA
0
4 4
C 8 6 6 1 0 u
NC
4 5
DVSS4
R 8 8 1
46
SERIALCLoCK
0
47
SYSCLoCK2
R882
4 8
CSN
0
CE
3
C 8 8 2
3.2V
V S S
2
1 0 0 0 p
NC
1
5 0 V
M
5.0V
CPVSS
24
SWIN
P L L - I C
23
CPZ
I C 1
2 2
A K 1 5 4 1
CP
2 1
PVSS
20
R 1 4
BIAS
19
2 2 k
3.2V
R 1 5
1 0
50C
I C 8 11
D C AMP
H A 1 6 3 0 D 0 3 M M
1
Vo U T 1
2
V I N 1 -
3.3V
Vo U T 2
3
V I N 1 +
33M
V I N 2 -
4
V S S
V I N 2 +
R 8 2 4
C 8 7 6
8 2 0 k (D)
1 0 u
C 8 7 4
R 8 9 0
R892
0
0 . 1 u
1 5 k
C877
3.2V
PC/BPF2[1]
1 0 0 0 p
MoD2
24
MoD1
2 3
AVSS1
2 2
MIC
2 1
B A S E B A N D I C
MICFB
2 0
ALTFB
I C 8 1 2
19
C D 6 8 6 Q 3
ALT
1 8
DISCFB
1 7
DISC
1 6
GPIo2
15
DVSS2
1 4
SYSCLoCK1
13
R 8 9 1
C 8 7 8
4 7 k
0 . 0 1 u
C 8 7 9
1 0 u
N
O
TX-RX UNIT (X57-7880-20)
5.0V
R 1 6
1 0
CVIN
D C AMP
I C 2
B D 7 5 4 2 F V M
1
o U T 1
V D D
8
2
I N 1 -
o U T 2
7
R 2 8
3
I N 1 +
I N 2 -
6
0
4
V S S
I N 2 +
5
R 2 9
4 7 0 k
C35
0 . 0 1 u
5.0V
8
V D D
7
6
5
R 9 6 2
C 9 1 5
1 0 k
1 u
R 8 9 7
2 7 k
R 8 9 8
2 . 2 k
R 8 9 3
0
R 8 9 9
C 8 9 2
1 u
1 2 0 k
C 8 9 3
R 9 0 0
1 0 0 k
4 . 7 u
50V
TXD
50T
50R
ASSIST
HSDENC
DISCFB
THDET
50C
LOIN
CV
CP
CPZ
16.8M
50C
VCOS
DCSW
TX/RX
MOD2
AF_CONT
50T
APCSW
50V
50M
33M
BPF1
PC/BPF2
TXD
ASSIST
50R
DETAF
MIC
MICFB
VOX
RSSI
33M
MICMT
WID/NAR
PTT/RXD1
SB
EMPTT
BUSY
PTT/RXD
OPTDET
VOLOUT
B
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