Kenwood TK-2180 Service Manual page 59

K
TK-2180
5T
DSW
APCSW
5C
MMUTE
VOX
R601 C601
390k 22p
R600
680k
AF BUFFER
IC600
TC75W51FK
D600
RB706F-40
8
1
8
AF
2 7
BUFFER
CONTROL
6
3
C602
4 5
4
0.1u
C738
330p
LSDO
BEEP
BSHIFT
C604
68p
R606
180k
XIN
XOUT
R752 R612
0 10k
CPU_VCC
RTDT
HSDIN
R518 R520
10k
10k
X500
11.0592MHz
L77-1958-05
R:0V
T:0V
R:0V
T:0.13V
R:2.47V
T:2.46V
R516
Q621
1k 2SC4649(N,P)
BEET SHIFT SW
CPU_DGND
LSW
INTRA
DSTB
W/N
AM2
HSDOUT
5RC
LSDIN
THP/VCOADJ
ASQL
T/R
DMUTE
DT
MIC
5M_CHARG
5CNS
5R
APC/TV2
B
RXD
TXD
RXD1
5M
CLK
54
X57-693 3/8
L
SCHEMATIC DIAGRAM
TUNE
IC603
TC75W51FK
C615
100p
R613 1 8
8
100k
2 7 R616
6 100k
3
4 5
4
C608
0.1u
C613
0.1u
R775 C759
56k 0.012u
R773 C737
DI9
82k 4.7u
IC601
TC75W51FK
1
8
8
2
7
3
6
4 5
4
LSD LPF / V REF
R792
22k
IC504
AT24256N10SI27
1 8
A0 VCC
CN502
2 7
A1 WP
3 6
NC SCL
4 5
GND SDA
CP522
R517
100*2
1k EEPROM
M
R635
4.7k
R636
HSD BPF / HSD COMP
4.7k
TUNE
IC604 C625
TC75W51FK
0.1u
1 8
R623
8
7
2
100k
6
3 R637
3.3k
5
4
4
C621
0.01u
LSD BUFFER
TO TCXO
IC602
TC75W51FK
1
8
8
R609
2 7
100k
3
6
4 5
4
D500-502
RTC BATT CONTROL
D501
1SS388
RTC PROCESSOR
IC503
RV5C386A
X501
D502
1 10 L77-1802-05
32KOUT
VDD
9
2
SCL
1SS388
OSCIN
8
3
SDA
OSCOUT
7
4
INTRB
CLKC
6
5
VSS
INTRA
CN503
INTRA
DSTB
5M_CHARG
N O
TX-RX UNIT (X57-6930-10)
DETECTOR
R674
D603
VOX
RB706F-40
0
MIC AMP / VOX
IC608
TC75W51FK
1
8
8
2
7
3
6
4 5
4
C627
0.01u
C675 C678
0.1u 0.1u
C684
1000p
R625
4.7k
D/A CONVERTER
IC605
M62364FP
1
24
VIN1 VIN8
R624 2 23
VOUT1 VOUT8
0
3 22
VOUT2 VOUT7
4
21
VIN2 VIN7
5 20
VDD GND
6
19
LD RESET
7 18
CLK VDAref
8
17
DI DO
9
16
VIN3 VIN6
10 15
VOUT3 VOUT6
11
14
VOUT4 VOUT5
12 13
VIN4 VIN5
5T
DSW
APCSW
5C
TV
RXAFI(25)
MMUTE
FILTERO
MOD
BEEP
TCXO
R785
12k
(D)
R652
10k
SPOUT
R644
10k
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