Main And Vco Units - Icom IC-2720 Service Manual

Dual band fm transceiver
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10-2 MAIN AND VCO UNITS

MAIN UNIT(1)
HV
J2000
W2001
HV
GND
R2000
47k
13.77V
HV
IC2002
TA7805F
I
O
G
EP2024
SP1
J2007
HV
+
-
R2102
4.7k
a
IC2001
S-80945CNMC-G9F-T2
J2005
1
OUT
2
VDD
3
b
VSS
c
J2004
d
C2206
18p
Q2016
XP4213
1
6
2
5
3
4
IC2000
HN58X2464TI
1
8
A0
VCC
2
7
A1
WP
3
6
A2
SCL
4
5
VSS
SDA
AFOUT
J2003
Q2018
DTC144EU
6
5
PSQL
4
3
DATA
DATAOUT
2
1
Q2019
DTA144EU
PTTP
DATAIN
J2001
8V
EP2000
MICU/D
EP2001
EXTMIC
EP2002
PTT
EP2003
to Microphone
MICE
EP2004
MIC
EP2005
GND
EP2006
MICIN
EP2007
J2006
CTHV
EP2008
TXDATA
EP2012
to CONTROL
RDATA
R2278
unit J2
GND
EP2013
MIC
EP2010
MICE
EP2011
13.7V
HV
5V
VCC
5VS
IC2003
8V
TA7808F
Q2000
2SB1132
I
O
G
Q2002
R2105
2SA1588
NTCG20
R2161
TEMP
R2162
R2163
TX: 4.84V
D2048
RX: 4.79V
MA2S111
Q2003
DTC144EU
1
RES
EP2015
2
XTAL
EP2014
3
EXTAL
5
4
CD
R2122 47k
VCC1
5
MD1
4
6
NC
MD0
7
NMI
8
STBY
9
VCC2(VCL)
UMMUTE
10
KIN15/CIN15/A23/PA7
11
KIN14/CIN14/A22/PA6
12
SCK0/P52
MOD_SET_DATA
13
RXD0/P51
R2167
100
14
TXD0/P50
15
VSS
TX_MUTE
R2169
330k
16
WAIT/P97
MIC_PTT
R2170
100
17
EXCL/P96
SUB_SEL
R2171
100
18
IOS/AS/P95
RPT_MUTE
19
X2001
HWR/P94
C2057
UTX_CTRL
20
CR-520
KIN13/CIN13/A21/PA5
68p
19.6608MHz
VTX_CTRL
21
KIN12/CIN12/A20/PA4
DTCS_SEL
22
RD/P93
23
R2172
IRQ0/P92
24
R2088
100
IRQ1/P91
1M
25
ADTRG/IRQ2/LWR/P90
R2101
47k
R2100
R2109
R2108
P_PTT
10k
4.7k
1k
P_MOD_MUTE
98_DATA
CM_MUTE
MIC_SEL
R2003
R_RSSI
1k
L_RSSI
P_SQL
TEMP
REV_DET
R2191
100k
P_PTT
DATAIN
8V
R2116 1k
R2006
100k
R2004
1
HV
C2186
0.039
Q2028
R2007 4.7k
2SC4116
Q2014
R2001 10k
XP4601
WN_SEL
MATORIX_IN1
150k
MATORIX_IN2
100
100
MATORIX_IN3
MATORIX_IN4
P14/A4
P15/A5
P16/A6
P17/A7
VSS
VSS
PB4/D4
PB5/D5
P20/A8
P21/A9
P22/A10
IC2013
P23/A11
HD64F2144AFA20
P24/A12
P25/A13
P26/A14
P27/A15
VCC1
PB6/D6
PB7/D7
P47/PWX1
P46/PWX0
P45/TMRI1
P44/TMO1
P43/TMCI1
P42/TMRIO/SCK2
R2035
100
R2036
100
R2034
100
CLONE_OUT
R2040
100
R2033
100
R2174
R2166
100
100
R2173
R2019
100
100
EP2022
5VS
R2268 100
C2082 1
EP2023
R2120
27k [USA]
8.2k except [USA]
C2083
1
R2259
470k
R2016
2.2k
1
5
4
3
1
5
4
2
3
2
IC2006
TA75S01F
C2187
IC2014
0.1
Q2005
TA75S558F
2SC4116
C2188
1
HV
5V
VCC
5VS
8V
D2032
D2036
D2040
D2044
D2033
D2037
D2041
D2045
C2046 100
D2034
D2038
D2042
D2046
C2040
D2035
D2039
D2043
D2047
C2041
R2075
D2032-D2047 MA2S111
390
47
D2032: [EUR],[SEA],[EXP]
D2033,2036-2038,2041,2043: [KOR],[SEA]
D2034: [EUR],[ITR] D2035: [ITR],[KOR]
D2039: [KOR] D2040: [ITR]
D2042: [KOR],[EXP]
D2044: [EUR],[ITR],[KOR]
D2046,2047: except [EXP]
L400_SHIFT
R_RX800
Q2017
L_RX140
75
DTC144TU
L_RX220
74
R2177
73
100
72
71
R2137
100
R_AM
CLONE_OUT
70
R2136
100
L_AM
CLONE_IN
69
R2176
100
L RX300
IC2009
68
TC4S81F
L_RX400
67
1200_9600SEL
1
66
L_UNLOCK
2
65
3
64
R2128 100
63
R_UVCO_SEL
62
L_R5CTRL
61
AF_VOL_CK
60
AF_VOL_DATA
59
R2124 100
IC2011
58
R_DET_MUTE
M62429FP
57
L_DET_MUTE
1
56
R_AF_MUTE
VIN1
VIN2
2
55
L_AF_MUTE
VOUT1
VOUT2
3
54
GND
VCC
R2038
100
MM_MUTE
4
53
DATA
CLK
R2026
100
DA_STB
52
R2027
100
DA_CK
51
R2028
100
DA_DATA
5VS
IC2007
BU4066BCFV
1
I/O
VDD
RIPTMOD
2
O/I
CONT.A
P_MOD_MUTE
3
CLONE_IN
O/I
CONT.D
Q2006
4
I/O
DTC144EU
5
FAN_CTRL
CONT.B
CONT.B
SUB_SEL
6
P_SQL
CONT.C
CONT.C
7
DTCS
VEE
DTMF
L_WXALT
RPT_MUTE
R_WXALT
MM_MUTE
L_DTCS_IN
DTMF
C2022
0.0033
R2107
47k
L_SQL
R2264
R2048
R_DTCS_IN
4.7k
100k
R_SQL
IC2008
BU4066BCFV
1
I/O
VDD
2
C2085 1
O/I
CONT.A
1200_9600SEL
3
O/I
CONT.D
4
I/O
CM_MUTE
5
CONT.B
6
CONT.C
R2119
7
VEE
27k [USA]
8.2k except [USA]
Q2022
C2084 1
DTC144EU
R2117
R2051 100k
8.2k [USA]
Q2023
5.6k except [USA]
DTC144EU
R2118
8.2k [USA]
Q2007
5.6k except [USA]
DTC144EU
5VS
C2061 10
R2103 4.7k
DATAOUT
R2093
R2057 8.2k
DATAIN
AFOUT
IC2010
BU4066BCFV
1
I/O
2
O/I
3
O/I
4
I/O
5
CONT.B
6
CONT.C
7
Q2009
VEE
DTC144EU
10 - 2
BUS LINE1
BUS LINE2
HV
5V
5VS
8V
IC2012
C2044
R2077
LA4445
0.1
4.7
C2042
R2076
0.1
4.7
C2043
C2049
470
0.1
100
C2039
470
Q2010
2SC4213
R2056
33k
R2054
Q2008
R2053
2SC4213
33k
5
4
R2064
MAIN
10k
UNIT
Q2011
R2050
R2060
2SC4213
(2)
47k
33k
8
7
6
5
14
13
12
11
I/O
10
O/I
9
O/I
8
I/O
MODIN
14
13
12
11
I/O
10
O/I
9
O/I
8
DATAMOD
I/O
2.2M
TX: 4.82V
C2066
RX: 4.77V
10
14
VDD
13
VDETS
CONT.A
12
UDETS
CONT.D
11
VAFO
I/O
10
O/I
9
O/I
8
UAFO
I/O

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