Icom IC-A23 Service Manual page 32

D11
MA2S111
R37
NTCCM16084LH
R36
15k
R38
C37
Q5
CLOUT 100k
0.001
UN9210
VCC
H
5.0V
EXTMIC
+5V
HV
TXC
PTT
EXTPTT
VORDET
+5V
Q11
Q17 Q16
XP4315
DTC144EE DTB123EK
6 5 4
C87
0.0047
1 2 3
R40
C86 R39 100k R43
0.015 22k 100k
8
Q12 UN9211
NC
R41 9
IC-A23 only IN2
47k 10
NF2
11
NF1
R42
12
NC
39 13
IN1
14
NC
IC8 BU4094BCFV
C88
9 8
15 IC9 BA3308F
QS VSS
10 LIGHTC
7
QS Q4
11 6 RECC
Q8 Q3
12 5 PLAYC
Q7 Q2
13 4 VORON
Q6 Q1
14 3 SCK
Q5 CLK
15 2 SDATA
D
OE
16 1 MASTB
STR
VDD
OE
C45
0.001
C101
R60
0.001
39k R64
4.7k
R61
R62
1 8 47k
220k
2 7
3 6
R63
4 5
15k
D16
C102
MA2S111
IC11 NJM2903V
470p
IC12 NJM2902V
R73 R74
C103
220k
4.7k
10 1 14
2 13
3 12
4 11
R83
C112
5 10
220k
R75 0.1
6 9
56k
7 8
C111
R85
3.3
18k
R76
33k C104 C107 R78
1 0.1 4.7k
R87
TBPS1S333K460H5Q
C106
R79 C108
C105
0.001
6.8k 0.001
10
R80
150k
0 R77
220k
C109
R81 R82
1.8k 0.001 4.7k
3 only
OE
JACKDET
SBAT
VOLCK
CHGC
RFSTB
TXC
SCK
SDATA
VOLDATA
VCC
UNLK
PTT
PCK
EXTPTT
PSTB
LIGHT
PDATA
DASTB
EXTMIC
+5V
C65
0.001
HV
C66
0.001
BEEP
RFDET
RSSI
VORDET
R46
C91
R48
TBPS1R104K475H5Q
0.0047 100k
C137 C136
1 10
5.0V
R45 33k
C90
C89
10 C100 C99
0.001 R58
R44 R59
0.001 0.001
100k
15k 100k
7
OUT2
6
NC
5
VCC
4
ALC
3
NC C92 R47
2 C127
GND D15 0.001
1 1M 0.47
OUT1 MA8036L
RECC
PLAYC
VORON
SCK
SDATA
MASTB
C125
R69
10
18k
C116
C117
0.001
0.1
R70 R71
IC13 NJM2904V 180k 18k
R65
220k 1 8
7
2
3 6
4 5 C118
R66
0.0047
220k
R67 R68
C114 10k 270k
C115
0.1
0.1
R72
4.7k
R89
470
R84
4.7k C113 C119
0.1 0.001
R90
IC14 NJM2903V
100k
1
8
R86
2
4.7k 7
3 6
4 5
R95
R93 D17
470k 22k MA2S111
C121
R91
0.01
39k Q13
2SC4211
R88 R94
33k
820k
C122
R560 R558
C600
0.1
1M 12k
0.01
(IC-A5 only)
J1
1 40
OE
JACKDET
SBAT
VOLCK
CHGC
RFSTB
TXC
SCK
SDATA
5
VOLDATA
VCC
35
C59
0.001
UNLK
PTT
PCK
EXTPTT
PSTB
10
TO
LIGHT
RF UNIT
PDATA 30
J3
DASTB
EXTMIC
+5V
HV
15
VREC
25
VORDET
BEEP
RFDET
MOD
VORON
RSSI
20 21
R113
120k
C98
0.1
+5V
C93
R52
1
120k
IC15 ISD1420SI
15 14
SP— SP+
16 13
VCCA VSSA
C601 17 12
MIC
VSSD
18 11
0.22
MIC REF NC
19 10
AGC A7
20 9
R109 ANA IN A6
21 8
100k ANA OUT NC
22 7
NC NC
23 6
PLAYL A5
24 5
PLAYE A4
25 4
RECLED A3
26 3
XCLK A2
27 2
REC A1
28
1
VCCD A0
VORON
SCK
SDATA
MASTB
OE
Q15
XP4315
4 5 6
C123
0.001
IC-A23 only 3 2 1
VORON
VOR CH: 5.0V
C120
R96
22
100k
R559
100k
(IC-A5 only)
R112
2.2M
COMPLETE VIEW