Kenwood TK-8180 Service Manual page 67

P
TX-RX UNIT (X57-6990-10) (B/3)
DT
MM2
AM1
AF
C480
1000p
MIC AMP
TC75W51FU
5
6
–
7
4.98V
8
VDD
V_REF
MM1
BEEP
AGND
LIMLV
AF SW IC
IC413
TC7MZ4053FK
1 16
1Y VCC
2 15
0Y
YCoM
3
14
1Z
XCoM
4
13
ZCoM 1X
5 12
0Z 0X
6 11
INH
A
7
10
VEE B
8
9
GND C
LSDIN
STSW
RXC
CK
SCSW
MIC
ME
OPT6
Q
SCHEMATIC DIAGRAM
R558 R597 C530 R606
10u
390k 1M
IC414
4
VSS
3
2.50V
+
R573 C511
2 R586
+ –
1
6.8k 0.1u
D408
MA742
R580
150
D409
MA742
R581
150
D408,409
MIC-AMP
AGC DETECTOR
C591
0.1u
AF MUTE SW
Q409
DTC363EU
AM2
4.93V
C519
1000p
C485
R559
120k
1u
2.81V
C476
0.1u
T/R
R:4.90V
T:0V
R
0
R603 C540
0
10u10
R589 R592 Q416,417
MIC MUTE SW
1k 0 0
MIC AGC
C539
R604
Q410
2SC4116(Y) 0
10u10
R:4.98V
T:0V
Q411
2SA1586(Y,GR)
MIC AGC
R579
22k
C517
R576
220k
0.01u
C492
R567
390k
0.1u
C491
R524 R531 R566
10k 0.1u 1M
10k
C499
820p
R583
0
A
C495
C503
68p
180p
A
A
1 25
AGNDIN
DTRAIN
C488
2 24
TXIN
AMP4O
12p 3 23
TXINO
AMP4N
22
4
LIMLV
AMP4P
IC415
5 21
EXTLIMIN
AMP3O
AQUA-L
6 20
MOD
AMP3N
19
7
VDD AMP3P
18
8
DTRLOADN
VSS
9 17
STD
XIN
R582
1M
X403
3.6864MHz
L77-1965-05
CK
S
TK-8180
AF
D601
1SS388
MIC MUTE
CONTROL
Q417
2SJ243
4.98V
4.83V
Q416
C543
2SJ243
10u10
MIC MUTE SW
4.88V
Q600
DTA144EE
R620 R646
220k 4.7k
MIC MUTE
CONTROL
D600
1SS388
R600
4.7k
2.49V
R595
270k
Q413
AF SW
2SJ243
2.49V
R584
0
C525
R587
150k
0.1u
R601 R607
270k
470k
C518
0.1u
R602
1M
R599 R608
180k
180k
AF SW
(VOICE)
Q415
AF
HN1L02FU
MUTE
SW
Q412
2SK1824
Q414
AF SW
2SJ243
LSDIN
R:4.92V
T:0V
STSW
RXC
OPT6
T
DT
AM1
C544
10u10
AUDIH
AO
RXAO
AM1
RXAI
MI2
AFO
ME
63
X57-699 4/9