Kenwood TK-2180 Service Manual page 60

P
TX-RX UNIT (X57-6930-10)
5T
DSW
APCSW
5C
TV
RXAFI(25)
MMUTE
FILTERO
MOD
AF SW
IC606
TC7W53FK
1
8
CoMMoN VCC
2
7
INH
CH0
3
6
VEE
CH1
4
5
GND A
BEEP
C633
TCXO
0.01u
R747 R643
0
100k
R754
R753
10k
4.7k
R:0V
T:0.18V
Q602
DTA114EE
SPOUT
LSW
W/N
AM2
HSDOUT
5RC
LSDIN
THP/VCOADJ
ASQL
T/R
DMUTE
DT
MIC
5CNS
5R
APC/TV2
B
RXD
TXD
RXD1
CPU_DGND
5M
CLK
Q
SCHEMATIC DIAGRAM
DETECTOR
D601
RB706F-40
D602
RB706F-40
DETECTOR
C650
R666
0.1u
SIDE TONE SW
Q619
C651
2SJ243 R667
0.1u 390k
R:2.47V
T:2.61V
R:4.97V
T:5.10V
R663
10k
R661
330k
EXTLIMIN
C636
0.1u
R:5.0V
T:5.13V
LIMIT SW
R648
R:4.99V 100k
T:5.12V
R
R695
R:4.97V
10k
T:0.14V
R691
10k
MIC.AGC
Q606
R692
2SC4738(GR)
82k
R681
1k
R682
2.7k
Q607
2SA1832(GR)
MIC.AGC
1M
C658
0.1u R677
22k
BEEP SW
Q605
RN4910
C729
C648
1000p
330p
C652
68p
R676
270k
C661
A
0.1u
1 25
DTRAIN
AGNDIN
2
24
TXIN AMP4O
3
23
TXINO AMP4N
AUDIO
4
22
PROCESSOR
LIMLV
AMP4P
5
21
IC607
EXTLIMIN AMP3O
AQUA-L
6 20
MOD AMP3N
7
19
VDD
AMP3P
8 18
DTRLOADN
VSS
9
17
STD
XIN
R675
1M
X600
3.6864MHz
L77-1965-05
S
TK-2180
R:0V R:2.50V
T:2.62V T:2.62V
L600
C679
0.1u Q610
2SJ243
MMUTE SW
C680
R739
AI
0.1u
180k
ME
R:4.92V
T:5.09V
R737
STSW
4.7k
SIDE TONE SW
Q620
DTA144TE
R:2.41V
C756 R738
T:2.53V
120k
0.1u
RXO
RXEI
RXEO
C666
0.1u
C670
R683
150k 0.1u
DEO
R698
1M
R696 R700 R701
180k 22k
180k
LSD LPF
AF SW
R:2.5V R:2.5V
T:2.54V T:0V
Q608
2SJ243 C673
RXI
0.1u
R:0V
R685
T:5.11V
4.7k
LSDIN
X57-693 4/8
T
MOD
5T
DSW
APCSW
5C
TV
TCXO
W/N
5RC
THP/VCOADJ
ASQL
T/R
DMUTE
SPOUT
DT
MIC
5CNS
5R
APC/TV2
B
RXD
TXD
RXD1
CPU_DGND
5M
55