Block Diagram - Icom IC-2720 Service Manual

Dual band fm transceiver
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SECTION 9

BLOCK DIAGRAM

L300
L400
L140
L220
5VS
J2001
_R5
_R5
_R5
_R5
8V
8V
MICU/D
EXTMIC
L UR5
L VR5
PTT
SW
SW
PTT
DET
MICE
D1040
D1041
DAN222
DAN222
MIC
Q2005
2SC4116
GND
L_UR5
L_VR5
MICIN
MDATA
MIC
CONT
AMP
IC2006 TA75S01F
IC2014 TA75S558F
D2011 MA8047
Q2028 2SC4116
MIC_PTT
98_DATA
MICU/D
EXTMIC
MICE
PSQL
SW
J2003
Q2018
DTC144EU
AFOUT
6
5
Q2019
4
3
DTA144EU
PTTP
2
1
SW
DATAIN
DATAOUT
+
VCC
SP1
-
AF
AMP
IC2012
J2005
LA4445
EXTMIC
P_SQL
J2004
P_PTT
Q2017 DTC144TU
D2029 MA742
CLONE_IN
CLONE
CLONE_OUT
BUFF
OPC-465
HV
VCC
+5
PROTECT
REG
REG
J2000
D2000 DSA3A1
Q2000
IC2002
D2030 RD20E
2SB1132
TA7805F
VCC
5V
Q2003
DTC144EU
POWER SW
+8
+5
RESET
CONTROL
REG
REG
IC2003
Q2002
IC2001
TA7808F
2SA1588
S-80945CNMC
-G9F-T2
D2048
8V
5VS
MA2S111
8V
Q9 DTC144EU
Q10 DTC144EU
Q11 2SA1588
Q12 2SA1588
VT8
UT8
REG
REG
Q13 2SB1132
D1 DAP222
VUT8
REG
VT8
UT8
VUT8
CHASSIS UNIT
+
Q23,Q26
2SC4116
M
MF1
FAN
FAN
CTRL
-
8V
5VS
Q2022,Q2023
IC2008
DTC144EU
BU4066BCFV
+8
REG
MIC
MIC_SENS
Q1023
SENS
2SC4116
CTRL
DATAIN
L_VCO8
ANALOGUE
SW
Q2007
DTC144EU
1200
9600
SEL
Q2006
DTC144EU
SUB
SELECT
D2012
DA221
LIMIT
VOUT1
VOUT2
5V
IC2013
HD64F2144AFA20
CPU
X2001
CR-520
MATRIX
EEPROM
D2032-D2047
TEMP
CLOCK
MA2S111
SENS
SHIFT
Q2016
TXDATA
IC2000
XP4213
HN58X2464TI
RXDATA
5V
MIC
MICE
9 - 1
DATAMOD
MODIN
8V
IC1000C
NJM12902V
IDC
LPF
BUFF
IC2007
IC1000A
IC1000D
BU4066BCFV
NJM12902V
NJM12902V
Q1001
DTC144EU
VDETS
DTCS
SELECT
UDETS
ANALOGUE
8V
SW
RLPT_MOD
SUB_SEL
LPF
Q1007
XP6501
5VS
IC2010
BU4066BCFV
8V
AFOUT
VAFO
AFOUT
UAFO
LPF
DATAOUT
VDETS
Q1008
XP6501
ANALOGUE
SW
DATAOUT
UDETS
Q2009
DTC144EU
SUB
SELECT
IC2011
M62429FP
VOLUME
5VS
Q2011
Q2010 2SC4213
Q2008
2SC4213
IC2009 TC4S81F
2SC4213
AF
AF
AF
MUTE
MUTE
MUTE
L_AFMUTE
R_AFMUTE
AF_VOL_DATA
AF_VOL_CK
DTCS
DTCS
DTCS_SEL
DTCS_SEL
L_DET_MUTE
L_DET_MUTE
L_DTCS_IN
L_DTCS_IN
L_WXALT
L_WXALT
R_DET_MUT
R_DET_MUT
R_DTCS_IN
R_DTCS_IN
R_WXALT
R_WXALT
L_SQL
L_SQL
L_RSSI
L_RSSI
R_SQL
R_SQL
R_RSSI
R_RSSI
L_PLLSW
L_PLLSW
OUT4
OUT4
L_VCO_SHIFT
L_VCO_SHIFT
DA_STB,DA_CK,DA_DATA
DA_STB,DA_CK,DA_DATA
R_PLLSW
R_RVCO_SEL
R_UVCO_SEL
TXC
REV_DET
UMMUTE
UAGC
5VS
VAGC
R400_SHIFT
L400_SHIFT
Q1000
Q1002
DTA114YU
DTA114YU
L R5
R R5
R AM5
REG
REG
REG
L_AM
L AM5
R AM5
R_AM
R_R5CTRL
L_R5CTRL
L_RX140
R_RX140
L_RX220
L_RX300
R_RX400
L_RX400
R_RX800
Q2014
XP4601
BUFF
MIC
MICE
5VS
IC1009
M62363FP-650C
Q1012
Q1009
2SC4116
2SC4215
BUFF
BUFF
D/A
8V
IC2015
TC4W53FU
Q1010
2SJ144
AF
AM/FM
MUTE
SEL
L_DET_MUTE
L_DTCS_IN
LPF
Q1003
XP4601
L_WXALT
LPF
IC2016
TC4W53FU
Q1011
2SJ144
AF
AM/FM
MUTE
SEL
R_DET_MUT
R_DTCS_IN
LPF
Q1004
XP4601
R_WXALT
LPF
L_SQL
L_RSSI
R_SQL
R_RSSI
VCO UNIT
L_PLLSW
FILTER
SW
5VS
IC1
MB15A02PFV-1
PLL
PLLCK,PLLDATA,
IC
OUT1(STRB),
L_UNLOCK
Q2 2SA1586
Q3 2SC4116
D2 DA221
X1
CR-718
12.8MHz
MOD
D1
HVC376B
REF
CONTROL
5VS
Q1005
Q1006
Q1
Q2
Q3
Q4
Q5
DTA143ZU
DTA143ZU
DTA114YU
DTA114YU
DTA114YU
DTA114YU
DTA114YU
L AM5
L R5
R R5
R AM5
L AM5
R R5
R AM5
REG
REG
REG
REG
REG
REG
REG
R R5
L R5
L140
R140
L220
L300
R400
R5
R5
_R5
_R5
_R5
L_RX140
R_RX140
L_RX220
L_RX300
R_RX400
L_RX400
R_RX800
TXDATA
RDATA
MIC
MICE
A
2nd_LO_38.4MHz
B
L AM5
AM
C
DET
Q1014,Q1017
XP6501
D
L_SQL
E
L_RSSI
F
R AM5
AM
G
DET
Q1022,Q1025
XP6501
H
R_SQL
I
R_RSSI
J
K
L
8V
IC2
TC4S66F
L VCO8
Q7
2SC5231
LOOP
BUFF
M
FIL
Q6 2SC5231
D3,D4,D5
HVC321B
Q1
2SC4403
BUFF
Q4
Q5 DTC143ZU
DTC144EU
D6 MA2S077
MUTE
SHIFT
N
MOD
O
REFCON
P
Q
R
Q6
Q8
DTA114YU
DTA114YU
L AM5
REG
L400
R800
_R5
_R5
J2006
CTHV
HV
TXDATA
RDATA
GND
MIC
MICE

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