Kenwood TK-3312 Service Manual page 41

P
90-21) TX-RX UNIT (X57-7890-21)
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
C 8 9 7
0 . 4 7 u
MICFB
C 8 9 8
0 . 4 7 u
VOX
RSSI
33M
MICMT
WID/NAR
PTT/RXD1
SB
EMPTT
BUSY
PTT/RXD
OPTDET
VOLOUT
B
Q
SCHEMATIC DIAGRAM
1 k
R 6 0
2.7V
L 2
1 5 n
C 2 0
C 2 9 C 3 4
R 6 2
1 5 0 k
1 0 p
3 p
4 7 0 p
Q 2
2 S C 5 6 3 6
0.05V
R F BU FF
CV(A)
D 1 2
L 4
R 2 7 L 7
1 . 8 u
1 0 k
R 1 9 1 S V 3 2 5 F
R 1 7
R 2 0
0 3 9 0 0
D 9
L 5
3 . 3 u
1 S V 3 2 5 F
D C S W
R 6 8
Q 1 1
S S M 3 J 0 5 F U - F
0
R 6 7
1 0 k
50C
M I C AG C
C 8 9 6
R 9 0 2
AG C A MP
1 0 k
0 . 1 u Q 8 1 0
2 S C 4 1 1 6 ( G R ) F
D 8 0 7
K D R 7 3 1
R 9 0 6
1 k
RECTIFICATION
R 9 0 7
2 . 7 k Q 8 1 1
D 8 0 8 K D R 7 3 1
2 S A 1 5 8 6 ( Y, G R ) F
AG C A MP
RECTIFICATION
Q 8 0 9
K T C 4 0 7 5 E ( Y, G R )
RECTIFICATION
R 9 0 3
C 9 0 4
1 0 0
0 . 4 7 u
D 8 0 9
K D R 7 3 1
3.3V
VOX
R
0.3V
L 2 2
R X V C O
2 7 0 n
C 5 1
L 1 7 C 6 4
1 8 n
6 8 p 8 p
M C H 3 9 1 4 ( 8 ) - H
Q 4
L 2 3
2 7 0 n
T X V C O
C 4 7 C 6 5
L 1 5
1 5 n
3 p
4 7 p
Q 5
M C H 3 9 1 4 ( 7 ) - H
D C S W R 3 9
Q 1 2
1 5 0 k
2 S K 1 8 3 0 F
C 9 0 9
R 9 1 0 R 9 1 2
1 0 k 0 . 1 u
0
RECTIFICATION
D 8 1 0 M C 2 8 5 0
R 9 1 1
R 9 0 8
1 0 k
1 0 0 k
R 9 0 9
1 M
4 7 p
C 9 0 7
4
o U T I N -
3
V S S
2
5
V D D
I N +
1
VOX A MP
I C 8 1 7
T C 7 5 S 5 1 F E ( F )
C 9 4 9
1 0 0 0 p
S
TK-3312/3317
C 7 2
C 7 3
2.5V
1 0 p (B) 1 5 p (B)
R 4 4
R F BU F R F A M P
1 0
2 S C 5 6 3 6 2 S C 5 6 3 6
Q 9
Q 8
C 6 6
R 4 6
0 . 3 p
1 5 0 k
4.8V
0.7V
R 4 5
1 0
R: 0V
T:4.1V
4.0V
R:4.0V
T: 0V
C 6 7
L 1 6
0 . 5 p
R I P P L E
F I LT E R
5.0V
K T C 4 0 7 5 E ( Y, G R )
Q 3
D C S W
S S M 6 L 0 5 F U - F
50C
50R
50C
R 4 1 4
1 0 0
4.8V
R 4 1 0
0.7V
3 3 0 k
Q 4 0 3
K T C 4 0 8 0 E - P
C 4 9 6
T R I P
0 . 1 u
R 4 6 9
5.0V
3 3 k
D C S W
C 4 0 6
I C 4 0 2 N J U 7 1 0 8
0 . 1 u
1
I N -
V D D
5
2
V S S
R 4 7 1
3
I N +
O U T 4
2 . 7 k
D 4 0 1
C 4 0 3
0 . 1 u
K D S 1 2 1 E - P
F I L S W
W:3.3V
N: 0V
T
C 8 5
2.3V
8 p
L 2 5 C 7 7
LO
6 . 8 n
1 3 p
THDET
S S M 3 J 0 5 F U - F
Q 7
D C S W
Q 6
R: 0V
T:3.3V
50C
DCSW
AFCONT
50T
APCSW
50V
50M
33M
BPF1
PCBPF2
TXD
C 4 1 5
50R
50C
3 9 p
C 4 1 0 L 4 0 2
2NDLO
1 0 0 n
2 2 p
WIDE
C F 4 0 2
L 7 2 - 1 0 1 0 - 0 5
C 4 0 4
0 . 1 u
MIXO
IFIN
Narrow
C F 4 0 1
L 7 2 - 1 0 4 5 - 0 5
D 4 0 2
C 4 0 5
0 . 1 u
K D S 1 2 1 E - P
F I L S W
WID/NAR
DETAF
RSSI
MIC
PTT/RXD1
SB
EMPTT
BUSY
PTT/RXD
OPTDET
VOLOUT
B
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