Kenwood TK-2312 Service Manual page 42

U
TK-2312/2317
R 2 0 3
R: 0V
T:1.4V
R F A M P
R:2.1V
Q 2 0 1
T:2.0V
C 2 0 1 C 2 6 4
R 2 3 7 R 2 0 5
0
0 4 7 p
1 0 0 0 p
R: 0V
T:0.7V
LO
R: 0V
T:4.9V
50T
THDET
RT 1 N 1 4 0 U - T 111
Q 3 0 1
D C S W
R301
0
R:3.3V
T: 0V
D C S W
DCSW
AFCONT
50T
APCSW
50V
50M
33M
BPF1
PCBPF2
TXD
50R
50C
2NDLO
5.0V
F M S YAT E M
I C 4 0 1
N J M 2 5 9 1 V
1
oSCIN
16
MIXIN
2
oSCoUT
GND 15
MIXO
3
MIXoUT
NoISEREC 14
4 V+
NoISEDET 13
C 4 1 4
IFIN
5 IFIN
RSSI 12
C 4 2 4
C 4 1 8
0 . 1 u
6 DEC
IFoUT 11
5 6 p
0 . 1 u
7
FILoUT
10
QUAD
R 4 1 7 8
FILIN
9
AFoUT
1 5 0 k
C 4 1 9
R 4 1 9 R 4 2 1
3 . 3 k
8 2 k
5 6 p
R 4 2 2
3 . 3 k
D C S W
WID/NAR
Q 4 0 1
DETAF
RT 1 N 4 4 1 U - T 111
RSSI
MIC
PTT/RXD1
SB
EMPTT
BUSY
PTT/RXD
OPTDET
VOLOUT
B
42
X57-788 5/6
V
SCHEMATIC DIAGRAM
R 2 11
R 2 0 6
R: 0V 1 0
T:1.5V
1 0 2 . 2 k
P R I - D RV
2 S C 5 4 5 5 - A
2 S C 5 6 3 6 C 2 6 5
C 2 0 9 Q 2 0 3
R: 0V
3 3 p
3 0 p
T:0.8V
3.4V
R 3 0 8
R303
1 . 8 k
5 6 0
R 3 11
1 5 0 k
(D)
R 3 1 2
1 5 0 k
(D)
R: 0V
7.5V
T:3.4V
Q 3 0 3
2 S K 1 8 3 0 F
R:4.8V
T: 0V
R:0.7V
C 4 2 9
R 4 3 3
T: 0V
6 8 0 k
3 3 p
C 4 3 3
R 4 3 4
I F A M P
R 4 2 5
0 . 0 1 u
0
Q 4 0 5
K T C 4 0 8 0 E - P
L 7 9 - 1 8 6 6 - 0 5
C D 4 0 1
R424
1 . 8 k
BUSY
RSSI
W / N S W
R 4 2 8
0
W
R 2 1 3
1 . 2 k
C 2 1 5 R 2 1 7 C 2 1 7
L 2 0 6
3 9 n
1 2 30p
2 2 p
H : 2 . 1 V
L : 1. 7 V
R 3 1 4 R 3 1 5
4 7 0 k (D) 1 0 k
I C 3 0 1
R 3 1 8
C 3 0 8
1
AoUT 4 7 0 k
V+
8
1 0 p
2
A-IN
BoUT
7
3
A+IN
B - I N
6
4
GND
B + I N
5
N J M 2 9 0 4 R B 1 - Z B
A P C
FB
R 3 1 7
D C S W
0
Q 3 0 4
RT 1 N 1 4 1 U - T 111
LOCAL
R:5.0V
T: 0V
R 4 3 7
4 . 7 k
L 4 0 8
49.95MHz
X F 4 0 1 5 6 n
L 7 1 - 0 6 5 5 - 0 5
C 4 4 4
2 2 0
2 p (B)
BPF
L 4 0 9
2 2 0 n
R438
1 k
M I X E R
C445
Q 4 0 6
3 S K 3 1 8
1 3 p
X
TX-RX UNIT (X57-7880-20)
D R I V E
C222
R D 0 1 M U S 1 - T 11 3
Q 2 0 4
8 2 p
R 2 2 1
5 6 k
H : 3 . 5 V
L : 2 . 9 V
D C S W
Q306
RT 1 P 4 4 1 U - T 111
D C S W
Q 3 0 5
2 S K 1 8 2 4 - A
FB
50R
L 4 1 0
5 6 n
C 4 4 7
3 p (B)
R:3.1V
T: 0V
C 4 5 5
R 4 4 5
0 1 0 0 0 p
C 4 5 2 R:3.1V
T: 0V
1 0 0 0 p
Y
THDET
DRVOUT
TXBIAS
APCDB
50T
50R
RXRF
50V
50M
33M
BPF1
TXD
AFCONT
PTT/RXD
MIC
SB
PTT/RXD1
SB
EMPTT
FB
OPTDET
VOLOUT
B