Kenwood TK-3312 Service Manual page 42

U
TK-3312/3317
R: 0V
T:1.8V
R:2.1V
T:2.0V
C 2 0 1 C 2 6 4
R 2 3 7 L 2 0 1
6 . 8 n
3 3 p 0 4 7 0 p
LO
R: 0V
T:4.9V
50T
THDET
RT 1 N 1 4 0 U - T 1 1 1
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
MIXIN 1 6
2
oSCoUT
GND 1 5
MIXO 3
MIXoUT
NoISEREC 1 4
4
V+
NoISEDET 1 3
C 4 1 4
5
IFIN IFIN
RSSI 1 2
C 4 1 8
0 . 1 u
6 DEC
IFoUT 1 1
0 . 1 u
7
FILoUT
1 0
QUAD
R 4 1 7 8
FILIN
9
AFoUT
4 7 0 k
C 4 1 9
R 4 1 9 R 4 2 1
3 . 3 k
3 3 0 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 1 1 1
RSSI
MIC
PTT/RXD1
SB
EMPTT
BUSY
PTT/RXD
OPTDET
VOLOUT
B
42
X57-789 5/6
V
SCHEMATIC DIAGRAM
R 2 1 1
R 2 0 3 R 2 0 6
R: 0V 2 7 0
T:1.3V
1 k 8 . 2 k
P R I - D RV
2 S C 5 4 5 5 - A
R F A M P
2 S C 5 6 3 6 C 2 6 5 C 2 0 9 Q 2 0 3
Q 2 0 1
4 p R: 0V
3 3 p
T:0.8V
R: 0V
T:1.1V
2.7V
R 3 0 3 R 3 0 8
1 . 8 k
5 6 0
R 3 1 1
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:4.9V
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
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
C 4 2 4
5 6 p
R 4 2 4
1 . 8 k
BUSY
RSSI
W / N S W
R 4 2 8
0
W
R 2 1 3
1 . 8 k
R 2 1 7 C 2 1 7
C 2 1 5
L 2 0 6
1 0 n
1 0
1 1 p 1 0 0 p
H : 2 . 5 V
L : 1 . 4 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
B o U T
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 1 1 1
LOCAL
R:5.0V
T: 0V
R 4 3 7
4 . 7 k
L 4 0 8
X F 4 0 1 49.95MHz 1 5 n
L 7 1 - 0 6 5 5 - 0 5
R 4 3 4
2 2 0
BPF
L 4 0 9
2 7 0 n
R 4 3 8
2 . 2 k
M I X E R
C 4 4 5
Q 4 0 6
1 2 p 3 S K 3 1 8
X Y
TX-RX UNIT (X57-7890-21)
D R I V E
C 2 2 2
R F M 0 1 U 7 P
Q 2 0 4
1 0 0 p
R 2 2 1
2 7 k
H : 3 . 9 V
L : 2 . 2 V
D C S W
Q 3 0 6
RT 1 P 4 4 1 U - T 1 1 1
D C S W
Q 3 0 5
2 S K 1 8 2 4 - A
FB
50R
L 4 1 0
1 5 n
C 4 4 7
2 . 5 p (B)
R:3.1V
T: 0V
C 4 5 5
R 4 4 5
0
4 7 0 p
R:3.1V
C 4 5 2
T: 0V
4 7 0 p
T
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