![background image](http://html.mh-extra.com/html/icom/ic-2720h/ic-2720h_service-manual_611472045.webp)
10-2 MAIN AND VCO UNITS
10 - 2
HV
WN_SEL
HV
HV
HV
HV
HV
HV
HV
DTCS
DTMF
L_WXALT
R_WXALT
L_DTCS_IN
L_SQL
R_DTCS_IN
R_SQL
REV_DET
TEMP
L_RSSI
R_RSSI
MIC_SEL
CM_MUTE
DATAOUT
AFOUT
P_SQL
P_PTT
DATAIN
DATAIN
PTTP
DATAOUT
PSQL
AFOUT
TEMP
TEMP
P_LR_SEL
DATAIN
AFOUT
DATA
XP4601
Q2014
MAIN UNIT(1)
RX: 4.79V
TX: 4.84V
13.7V
13.77V
RX: 4.77V
TX: 4.82V
5VS
2.2M
R2094
R2093 2.2M
5VS
8V
5VS
VCC
5V
HV
D2046,2047: except [EXP]
D2044: [EUR],[ITR],[KOR]
D2042: [KOR],[EXP]
D2039: [KOR] D2040: [ITR]
D2034: [EUR],[ITR] D2035: [ITR],[KOR]
D2033,2036-2038,2041,2043: [KOR],[SEA]
D2032: [EUR],[SEA],[EXP]
D2032-D2047 MA2S111
8V
5VS
EP2022
0.01
C2176
8V
5VS
8V
5VS
VCC
5V
R2136 100
R2137 100
47k
R2052
0.1
C2024
47k
R2050
0.1
C2025
10k
R2064
DATAOUT
TA75S01F
IC2006
15k
R2257
1
C2188
47p
C2016
MICE
MIC
GND
RDATA
TXDATA
CTHV
EP2024
1k
R2108
0.001
C2088
4.7k
R2109
C2207 0.001
GND
HV
1
2
3
6
4
5
d
c
b
a
d
c
b
a
J2004
J2005
SP1
J2000
MIC_PTT
98_DATA
DTC144EU
Q2023
DTC144EU
Q2022
OUT3
RIPTMOD
CLONE_IN
CLONE_OUT
R2028 100
R2027 100
R2026 100
R2038 100
R2124 100
R2128 100
R2176 100
100
R2177
C2020 0.01
DA_DATA
DA_CK
DA_STB
MM_MUTE
L_AF_MUTE
R_AF_MUTE
L_DET_MUTE
R_DET_MUTE
AF_VOL_DATA
AF_VOL_CK
L_R5CTRL
R_UVCO_SEL
L_UNLOCK
1200_9600SEL
L_RX400
L RX300
L_AM
R_AM
L_RX220
L_RX140
R_RX800
L400_SHIFT
CM_MUTE
1200_9600SEL
DTMF
MM_MUTE
RPT_MUTE
SUB_SEL
P_MOD_MUTE
R_SQL
R_DTCS_IN
HD64F2144AFA20
IC2013
P42/TMRIO/SCK2
P43/TMCI1
P44/TMO1
P45/TMRI1
P46/PWX0
P47/PWX1
PB7/D7
PB6/D6
VCC1
P27/A15
P26/A14
P25/A13
P24/A12
P23/A11
P22/A10
P21/A9
P20/A8
PB5/D5
PB4/D4
VSS
VSS
P17/A7
P16/A6
P15/A5
P14/A4
P13/A3
P12/A2
P11/A1
P10/A0
PB3/D3
PB2/D2
P30/D8
P31/D9
P32/D10
P33/D11
P34/D12
P35/D13
P36/D14
P37/D15
PB1/D1
PB0/D0
VSS
P80
P81
P82
P83
P84/IRQ3/TXDI
P85/IRQ4/RXD1
P86/IRQ5/SCK1
RESO
IRRXD/RXD2/TMO0/P41
IRTXD/TXD2/IMCIO/P40
KIN8/CIN8/A16/PA0
KIN9/CIN9/A17/PA1
AVSS
AN7/P77/DA1
AN6/P76/DA0
AN5/P75
AN4/P74
AN3/P73
AN2/P72
AN1/P71
AN0/P70
AVCC
AVREF
KIN7CIN7/IRQ7/P67
KIN6CIN6/FTOB/P66
KIN5CIN5/FTID/P65
KIN4CIN4/FTIC/P64
KIN10CIN10/A18/PA2
KIN11CIN11/A19/PA3
KIN3CIN3/FTIB/P63
TMIY/KIN2/CIN2/FTIA/P62
KIN1CIN1/FTOA/P61
KIN0CIN0/FTCI/P60
ADTRG/IRQ2/LWR/P90
IRQ1/P91
IRQ0/P92
RD/P93
KIN12/CIN12/A20/PA4
KIN13/CIN13/A21/PA5
HWR/P94
IOS/AS/P95
EXCL/P96
WAIT/P97
VSS
TXD0/P50
RXD0/P51
SCK0/P52
KIN14/CIN14/A22/PA6
KIN15/CIN15/A23/PA7
VCC2(VCL)
STBY
NMI
MD0
MD1
VCC1
EXTAL
XTAL
RES
L_SQL
L_DTCS_IN
R_WXALT
L_WXALT
DTMF
DTCS
P_SQL
FAN_CTRL
CLONE_OUT
CLONE_IN
REV_DET
TEMP
L_RSSI
R_RSSI
MIC_SEL
CM_MUTE
98_DATA
P_MOD_MUTE
P_PTT
100k
R2267
150k
R2087
R2266 100k
TEMP
WN_SEL
R_RX400
R_RX140
R_R5CTRL
L_VCO_SHIFT
R400_SHIFT
R_VVCO_SEL
L_PLLSW
R_PLLSW
R_UNLOCK
P_LR_SEL
MATORIX_IN1
MATORIX_IN2
MATORIX_IN3
MATORIX_IN4
PLLDATA
PLLCK
OUT1
OUT2
OUT3
OUT4
100
R2164
OUT4
OUT3
OUT2
OUT1
MATORIX_IN4
MATORIX_IN3
MATORIX_IN2
MATORIX_IN1
D2047
D2043
D2035
D2039
D2046
D2042
D2034
D2038
D2045
D2041
D2033
D2037
D2044
D2040
D2036
D2032
4.7
R2076
0.1
C2042
4.7
R2077
0.1
C2044
0.1
C2049
12k
R2083
330k
R2078
470
C2039
470
C2043
C2040 100
47
C2041
390
R2075
C2038 220
47
C2036
390
R2073
12
11
10
9
8
7
6
5
4
3
2
1
LA4445
IC2012
DTC144TU
Q2017
15k
R2099
MA742
D2029
0.001
C2074
0.001
C2028
4
5
3
2
1
TC4S81F
IC2009
CLK
VCC
VOUT2
VIN2
DATA
GND
VOUT1
VIN1
5
6
7
8
4
3
2
1
M62429FP
IC2011
2SC4213
Q2010
33k
R2056
0.47
C2031
10k
R2063
R2058 10k
R2054
33k
R2053
0.47
C2027
10k
R2055
2SC4213
Q2008
2SC4213
Q2011
470p
C2034
10k
R2065
0.47
C2032
33k
R2060
2.2M
R2092
0.1
C2060
2.2M
R2091
C2064 1
C2065 1
R2095 10k
R2096 10k
100k
R2273
100k
R2084
100k
R2074
0.1
C2059
DTC144EU
Q2006
I/O
O/I
O/I
I/O
CONT.D
CONT.A
VDD
VEE
CONT.C
CONT.B
I/O
O/I
O/I
I/O
8
9
10
11
12
13
7
6
5
4
3
2
BU4066BCFV
IC2007
14
1
C2085 1
W2030
100k
R2048
0.0033
C2191
0.022
C2193
4.7k
R2264
0.01
C2192
2.2M
R2067
2.2M
R2062
0.1
C2058
R2066 2.2M
R2061 2.2M
R2107 47k
C2022 0.0033
BU4066BCFV
IC2008
I/O
O/I
O/I
I/O
CONT.D
CONT.A
VDD
VEE
CONT.C
CONT.B
I/O
O/I
O/I
I/O
8
9
10
11
12
13
14
7
6
5
4
3
2
1
0.001
C2026
0.001
C2037
DTC144EU
Q2007
R2051 100k
C2062 10
C2063 10
I/O
O/I
O/I
I/O
CONT.D
CONT.A
VDD
VEE
CONT.C
CONT.B
I/O
O/I
O/I
I/O
8
9
10
11
12
13
14
7
6
5
4
3
2
1
BU4066BCFV
IC2010
10
C2066
DTC144EU
Q2009
R2068 10k
C2073 0.1
R2098 2.2M
DTA144EU
Q2019
47k
R2183
DTC144EU
Q2018
100k
R2104
C2061 10
R2103 4.7k
R2057 8.2k
DA221
D2012
10
C2029
C2084 1
8.2k except [USA]
27k [USA]
R2119
C2082 1
R2268 100
8.2k except [USA]
27k [USA]
R2120
C2083 1
R2039 470k
C2072 0.1
5
4
2
3
1
MA8047
D2011
R2023 10k
R2022 12k
R2021 120k
R2020 330k
2SC4116
Q2005
R2014 10k
MA2S111
D2010
R2017 100k
R2013 22k
2.2k
R2016
470k
R2259
TA75S558F
IC2014
5
4
2
3
1
EP2023
R2116 1k
C2086 33
18k
R2260
R2258 1
R2261 22k
C2190 2.2
33k
R2253
0.039
C2185
0.039
C2186
4.7k
R2252
68k
R2254
4.7k
R2255
5.6k
R2256
0.1
C2187
2SC4116
Q2028
SDA
SCL
WP
VCC
VSS
A2
A1
A0
5
6
7
8
4
3
2
1
47k
R2101
10k
R2100
HN58X2464TI
IC2000
0.1
C2076
22p
C2052
C2053 4p
19.6608MHz
CR-520
X2001
1M
R2088
18p
C2206
22k
R2090
22k
R2276
0.001
C2055
3
2
1
4
5
6
XP4213
Q2016
100
R2172
R2171 100
R2170 100
R2169 330k
R2122 47k
EP2014
EP2015
NC
CD
3
2
1
4
5
VSS
VDD
OUT
C2078 0.001
C2077 0.033
S-80945CNMC-G9F-T2
IC2001
C2079 2.2
R2121 47k
4.7k
R2102
47p
C2075
BUS LINE2
5V
UAFO
VAFO
UDETS
VDETS
DATAMOD
MODIN
BUS LINE1
8V
5VS
220
C2047
C2046 100
5.6k except [USA]
8.2k [USA]
R2118
5.6k except [USA]
8.2k [USA]
R2117
CONT.C
CONT.B
1k
R2003
100k
R2191
68p
C2057
DTC144EU
Q2003
-
+
J2007
R2163 100
R2162 100
R2161 150k
NTCG20
R2105
R2106 100k
C2081 0.1
C2018 10
C2017 0.1
TA7808F
IC2003
C2014 0.47
C2019 10
2SA1588
Q2002
1k
R2187
MA2S111
D2048
4.7k
R2186
EP2019
C2015 10
C2013 0.1
C2003 0.47
TA7805F
IC2002
O
G
I
O
G
I
2SB1132
Q2000
R2002 1.5k
47k
R2000
C2009 0.001
C2006 0.1
W2001
C2001 0.001
C2000 2200
D2000 DSA3A1
D2030 RD20E
UMMUTE
DTCS_SEL
VTX_CTRL
UTX_CTRL
RPT_MUTE
SUB_SEL
MIC_PTT
TX_MUTE
MOD_SET_DATA
R2167 100
100
R2173
100
R2019
100
R2174
R2040 100
R2036 100
R2166 100
R2033 100
R2034 100
R2035 100
C2021 0.1
R2007 4.7k
R2001 10k
10k
R2005
47p
R2086
R2010 10k
R2008 1k
100k
R2006
C2051 10
1
R2004
47p
C2008
C2070 47p
C2069 47p
C2067 47p
EP2011
EP2010
EP2013
R2278
EP2012
EP2008
C2011 0.001
C2010 0.001
C2068 47p
C2007 0.001
C2005 0.001
C2004 0.001
C2002 47p
EP2007
EP2006
EP2005
EP2004
EP2003
EP2002
EP2001
EP2000
MICIN
GND
MIC
MICE
PTT
8V
EXTMIC
MICU/D
J2006
unit J2
to CONTROL
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
(2)
UNIT
MAIN
J2003
to Microphone
J2001
HV
6
4
2
1
3
5