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IC-A110
Service manual
Main Unit; Block Diagram - Icom IC-A110 Service Manual
Vhf air band transceiver
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Instruction manual
(24 pages)
,
Service manual
(4 pages)
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Price list
(158 pages)
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SECTION 9
BLOCK DIAGRAM
D51~D52
1SV271 X2
Q6
Q7
Q4~Q5
2SC4211
2SC4215
2SC4215 X2
W28
IF
IF
AM
DET
AMP
AMP
Q77
IC18
2SD1819A
TC4W53FU
W/N
AGC
AMP
SW
[USA/-1] only
EXT MIC
LEVEL ADJ
J6
R336
IC4: BA3308F
+5V
IC16
IC5
1
R110
D14: MA8036L
TC4W53FU
TA75S01F
2
EXTMIC
3
IN/EXT
AF
ALC
4
EPTT
MIC SW
AMP
AMP
5
AF OUT
6
MIC
7
Q33
LEVEL ADJ
XP4315
ACC
R/T
CONT
D27: MA111
Q52: 2SA1622
PTT
CONT
IC37
TDA7233D
IMPE-
AF
DANCE
AMP
D43: 1SS352
CONVERT
Q74: 2SB798
T1
Q75: 2SC4081
ST-82P
Q86: XP4315
S MUTE
J7
EXT SP
IC41
TA8208H
PWR
AMP
LCD
BACK LIGHT
Q1: DTA143ZU
DS2~DS7
Q7: DTC114EU
CL-170Y-CD X6
LEDC1
BUFF
Q5: DTA143ZU
LCD
Q6: DTC114EU
DS1
LEDC2
BUFF
HLC7453-012400
S2
VUP
S3
D6
VDN
DA204U
S4
PROTECT
V/M
S5
SCAN
S6
X1
PRI
PBRC3.68AR
(3.68MHz)
S7
SQL
Q2: 2SA1622
Q3: 2SC4211
IC3
S8
D5: MA111
TC7W04FU
POWER
I/O BUFF
I/O BUFF
S1
DIAL
+5V
FRONT UNIT
TS
J2
+8V
1
CLONE I/O
2
3
PTT
4
5
MIC
6
7
HANG
8
MIC CONNECTOR
SP
SP
2nd IF=450KHz
D50: 1SV271
FI3
D44: MA8051
D30
CFWM450D
IC40: TA31136FN
Q3: 2SC4215
1SV307
W25
2nd IF
IF
FIL
CERAMIC
SW
IC
AMP
BPF
IF AGC
Q69
FI4
IC17
DTB123EK
TC4W53FU
CFG450H
BUFF
[USA/-1] only
CERAMIC
W/N
SW
D31
BPF
1SV307
Q68
XP4315
FIL
BUFF
SW
Q78
2SD1819A
RF AGC
AGC
AMP
2nd Lo:38.4MHz
IC11:NJM2107F
IC31
RSSI
TA75S01F
SQL
SQLI
CONT
LPF
FISW
IC22
IC51
IC19
TC4W53FU
TA75S01F
NJM2902V
MOD/AF
SW
HPF
LPF
TRC
PTTS
IC6:TC4S66F
IC42
IC30
IC13
Q80:DTA144EU
TC4S66F
TC9260F
Q81:DTC144EU
TA75S01F
S MUTE
AF
E-VOL
R MUTE
AMP
SW
RMUTE
SMUTE
MAIN UNIT
IC5
Q4
BU4094BC
XP4315
R/T
R/T
EXPAND
CONT
IC2
CPU
S-80942ANMP
RESET
IC1
TRC
HD6433823A19D
TMUT
CPU5V
EEPROM
+5V
IC4
25LC160T-I/SN
8V
+5V
CURRENT
VCC
Q22: 2SC4211
Q23: 2SB1132
D15: MA111
PSWC
9 - 1
1st MIX
1st IF=38.85MHz
Q2
Q1
FI1
D29
D7,D8
FL-306
1SV307
3SK184
HVU350 X2
3SK184
XTAL
FIL
RF
SW
BPF
BPF
FI2
D28
FL-307
1SV307
XTAL
FIL
SW
BPF
TUNE
Q42
2SC4403
PRE
AMP
Q83,Q84
TRIPLER
2SC4215 X2
AMP
MOD ADJ
R121
Q15
Q14
2SC4228
2SC4403
T8
R/T
BUFF
BUFF
SW
D10,D11
MA77 X2
TMUTE
12.8MHz
X1
CR-657
Q79
R59
2SK880
TCXO
(12.8MHz)
TUNE
LPF
BUFF
TUNE
ADJ
Q12
2SC4403
PLL IC
IC28
TC4S66F
IC2
TB31207AFN
AF MUTE
D66: SB07-03C
Q100: FW215
Q101: DTC144EU
SP MUTE
AF MUTE
Q94
FW215
SP OUT
SW
8V
D62: SB07-03C
Q96: DTC144EU
Q97: DTC144EU
Q72: XP4315
Q53: DTB123EK
SP OUT
CONT
R8
R8
SW
IC48
TC4W53FU
MOD
MOD/AF
AF
SW
Q71: DTC144EE
Q70: DTB123EK
T8
T8
SW
IC26
D35: MA8330
TA78L05F
Q82: 2SC4081
+5
+8V
+5V
REG
REG
+5V
VCC
IC29
BA08FP
DC-DC CONVERTOR
+5V
+8V
REG
REG
AMP
D26
IC7
DE5SC6M
S-81350HG
LINE
DC-DC
FILTER
DET
D6,D37
D38
D1~D3
HVU350 X2
1SV271
UM9401F X3
RF
RX
ANT
RF
LPF
AMP
ATT
SW
BPF
TX & RX=118.0~136.975MHz
D53.D54: MA2S111
Q73: 2SC4081
BUFF
Q20
Q21
Q51
2SK3074
2SK3075
MRF137
PRE
PRE
PWR
DRIVE
DRIVE
AMP
MOD V
IC50
Q98
Q11
TA75S01F
2SA1586
2SC4081
APC
PWR
CNT
DET
PWR
APC
CNT
AMP
D4,D5
RB706F X2
Q99
R150
2SC4116
POWER ADJ
T MUTE
AMP
TX:118.0~136.975MHz
RX:79.15~98.125MHz
VCO
Q43
2SC4226
Q44: 2SC4226
D64: HVU350
BUFF
BUFF
TX VCO
Q59: 2SC4226
LOOP
D65: HVU350
FIL
RX VCO
Q16
Q58
2SC4116
XP1113
+8V
RIPPLE
VCO
FIL
R/T SW
D57: SB07-03C
Q92,Q93
2SK2414 X2
IC47: HIP4081A
AF
FET
LINE
POWER
DRIVER
FILTER
AMP
IC44
uPC311
D56
PWM
DE5SC6M
MOD
DC-DC
DET
IC45
IC47A
NJM072BM
HIP4081A
DC-DC
DC-DC
REF,V
FET
CONVERT
CONVERT
OSC
DRIVER
CONTROL
AMP
IC46
Q91
MC33063AD
2SK2414
D36
DSA3A1
POWER
POWER
PROTECT
SW
SW CTRL
IC15
Q102
Q90
2SC4081
MC33063AD
2SA1471
DC-DC
FET
POWER
CONVERT
POWER
AMP
DRIVER
CONTROL
SW CTRL
D55: SB07-03C
Q87,Q88
2SK2414 X2
IC43: HIP4081A
Q89
XP1501AB
[ ANT ]
DC POWER SUPPLY
13.8V or 24.0V
W1
1
+
-
2
RX
TX
COMMON LINE
DATA BUS LINE
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