Block Diagram; Front Unit - Icom IC-A110EURO Service Manual Addendum

SECTION 9

BLOCK DIAGRAM

D51-D52
1SV271×2
Q6
Q7 Q4-Q5
2SC4211 2SC4215 2SC4215×2
W28
IF IF
AM
AMP
DET AMP
Note
Q77
A : [A110EURO] IC18
2SD1819A TC4W53FU
C : [A110]
W/N
AGC
AMP SW
[USA/-1], [EUR/-1] only
EXT MIC
LEVEL ADJ
J6
R336 IC4: BA3308F
+5V IC16
IC5
1 D14: MA8036L
TC4W53FU R110
TA75S01F
2
EXTMIC
3
IN/EXT AF
ALC
4
EPTT MIC SW AMP
AMP
5
AF OUT
6
7 MIC
Q33
LEVEL ADJ
XP4315
ACC
R/T
D27: MA111 CONT
Q52: 2SA1622
PTT
CONT
IC37
TDA7233D
IMPE-
AF
DANCE
AMP
CONVERT D43: 1SS352
Q74: 2SB798
T1 Q75: 2SC4081
Q86: XP4315
ST-82P
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 EF0P3684E5
(3.68MHz)
S7
SQL
Q2: 2SA1622
IC3
Q3: 2SC4211
S8
D5: MA111 TC7W04FU
POWER
I/O BUFF I/O BUFF
S1
DIAL
+5V
TS

FRONT UNIT

J2
+8V
1
CLONE I/O
2
3
PTT
4
5
MIC
6
7
HANG
8
MIC CONNECTOR
SP
SP
2nd IF=450 kHz
D50: 1SV271 D30
FI3 D44: MA8051
Q3: 2SC4215
CFWM450D IC40: TA31136FN 1SV307
W25
2nd IF
IF FIL
CERAMIC
AMP SW
IC
BPF
IF AGC
Q69
DTB123EK
FI4 IC17
CFG450H TC4W53FU
BUFF
[USA/-1]
, [EUR/-1] only
CERAMIC W/N
BPF SW D31
Q68 1SV307
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
IC13 IC42
IC30 Q80:DTA144EU
TC4S66F TC9260F Q81:DTC144EU TA75S01F
AF
S MUTE
E-VOL R MUTE
AMP
SW
RMUTE
SMUTE
MAIN UNIT
IC5 Q4
BU4094BCFV XP4315
R/T R/T
EXPAND
CONT
IC2
CPU S-80942ANMP-DD6
RESET
IC1
TRC
HD6433823A80D A
HD6433823A19D C
TMUT
CPU5V
EEPROM
+5V
IC4
X25170SI-2.5T3
8V
+5V
CURRENT
VCC
Q22: 2SC4211
Q23: 2SB1132
D15: MA111
PSWC
9 - 1
1st MIX
1st IF=38.85 MHz
FI1 D29 Q2 Q1
D7,D8
3SK184 3SK184
FL-306 1SV307 HVU350B×2
XTAL FIL
RF
SW
BPF
BPF
FI2 D28
FL-307 1SV307
XTAL FIL
SW
BPF
TUNE
Q42
2SC4226
PRE
AMP
Q83,Q84
TRIPLER
2SC4215×2
AMP
MOD ADJ
R121
Q15 Q14
2SC4228 2SC4403
T8 R/T
BUFF BUFF
SW
D10,D11
MA77×2
TMUTE
X1 CR-658A A
12.8MHz
CR-657A C
Q79
R59 2SK880 TCXO
(12.8MHz)
TUNE
BUFF LPF
TUNE
ADJ
Q12
2SC4403
PLL IC
IC28
IC2
TC4S66F
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-KD
LINE DC-DC
FILTER DET
D6,D37 D38 D1-D3
HVU350B×2 1SV271 MA4PH224×3
RF RX ANT
RF
LPF
AMP ATT SW
BPF
TX & RX=118.0-136.975 MHz
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-40×2
Q99
R150
2SC4116
POWER ADJ
T MUTE
AMP
TX:118.0-136.975 MHz
RX:79.15-98.125 MHz
VCO
Q43
Q44: 2SC4226
2SC4226
D64: HVU350B
BUFF BUFF
TX VCO
Q59: 2SC4226
LOOP D65: HVU350B
FIL
RX VCO
Q16 Q58
2SC4116 XP1113
+8V RIPPLE VCO
FIL
R/T SW
D57: 1SS193 Q92,Q93
2SK2414-Z×2
IC47: HIP4081AIB
AF
FET LINE
POWER
DRIVER FILTER
AMP
IC44
µPC311G2
D56
PWM
DE5SC6M
MOD
DC-DC
DET
IC45
IC47A
NJM072BM
HIP4081A IB
DC-DC
DC-DC
REF,V FET
CONVERT CONVERT
OSC
DRIVER
CONTROL AMP
IC46 Q91
MC33063AD 2SK2414-Z
D36
DSA3A1
POWER POWER PROTECT
SW SW CTRL
IC15 Q90 Q102
2SC4081
MC33063AD 2SA1471R
DC-DC
FET
POWER
CONVERT
POWER
AMP DRIVER
CONTROL
SW CTRL
Q87,Q88 D55: SB07-03C
2SK2414×2 IC43: HIP4081AIB Q89
XP1501
[ ANT ]
DC POWER SUPPLY
13.8V or 24.0V
W1
1
+
2 -
RX
TX
COMMON LINE
DATA BUS LINE