Kenwood TK-2180 Service Manual page 60

P
TX-RX UNIT (X57-6932-71)
5T
DSW
APCSW
5C
TV
RXAFI(25)
MMUTE
AF SW
IC606
TC7W53FK
1
8
CoMMoN
VCC
2
7
INH
CH0
3
6
VEE CH1
4 5
GND
A
C633
0.01u
R747 R643
FILTERO 0 100k
MOD
R754
R753
10k
4.7k
BEEP
TCXO
LIMIT SW
Q602
R:0V
DTA114EE
T:0.18V
R:4.99V
T:5.12V
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
RB706F-40
DETECTOR
RB706F-40
SIDE TONE SW
C650 0.1u
Q619 2SJ243 0.1u
C651
R:2.47V
T:2.61V
R:4.97V
T:5.10V
R663
10k
R661
330k
A
R803
0
EXTLIMIN
R802
0
C636
0.1u
R801
R:5.0V
0
T:5.13V
R648
100k
2SC4649(N,P)
R805
47k
R815
0
R
R695 10k
R:4.97V
T:0.14V
R691
10k
MIC. AGC
Q606
D601
2SC4738(GR)
R692
R681
1k 82k
R682
2.7k
D602
Q607
2SA1832(GR)
R666 1M
MIC. AGC
R667 390k
C658
0.1u R677
22k
BEEP SW
Q605
C648
RN4910
1000p
C729 330p
R776 47k
C652
R676
68p
270k
R804
0
C661
0.1u
1
25
AGNDIN DTRAIN
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 DTRLOADN
18
VSS
9 17
STD
XIN
R675
1M
X600
3.6864MHz
L77-1976-05
C771 C765
Q625 2SC4649(N,P)
27p
27p
(G)
(G)
Q625,626
BEAT SHIFT SW
S
TK-2180
R:0V
R:2.50V
T:2.62V
T:2.62V
C679 L600
0.1u Q610
2SJ243
MMUTE SW
C680
R739
0.1u 180k
R:4.92V
T:5.09V
R737
4.7k
SIDE TONE SW
Q620
DTA144TE
R:2.41V
C756
R738
T:2.53V
0.1u 120k
C666
0.1u
R683 C670
150k 0.1u
DEO
R698
1M
R696 R700 R701
180k 180k 22k
LSD LPF
R:2.5V
R:2.5V
AF SW
T:2.54V
T:0V
Q608
C673
2SJ243
0.1u
R:0V
R685
T:5.11V
4.7k
Q626
LSDIN
T
MOD
5T
DSW
APCSW
5C
TV
TCXO
AI
ME
STSW
TXI
RXO
RXEI
RXEO
RXI
W/N
5RC
THP/VCOADJ
ASQL
T/R
DMUTE
SPOUT
DT
MIC
5CNS
5R
APC/TV2
B
RXD
TXD
RXD1
CPU_DGND
5M
55
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