Icom IC-A23 Service Manual page 36

11 - 2 RF UNIT
VCC
C50
1
9.3V Q7
2SB1132
Q8
2SC4211
TXC
C52 C51
D7
R40
0.1 0.001 MA111
3.3k
RFDETV
Q19 C113
UN9210 10
VORON
Q20
UN9115
+5V
R5C
8 7 6 5
IC2 R102
100k
TC4W53FU
1 2 3 4
DETO
C197
0.01
Q21
C115
UN9210
0.22
DETMUTE
+5V +5V
AFC
EMBI
WXC
C281
0.1
16 15 14 13 12 11 10 9
IC5
BU4094BCFV
R157
100k
1 2 3 4 5 6 7 8
R5C
J3
JACKDET
1
40
OE
VOLCK
2 39
SBATT
3 38 RFSTB
CHGC
4 37 SCK
TXC
VOLDATA
5 36
SDATA
GND
6 35
VCC
GND
7 34
VCC
8 PTT
33
UNLK
EXTPTT
9 32
PCK
LIGHT
TO 10 31
PSTB
LOGIC
UNIT 11 30 DASTB
J1 PDATA
GND
12 29
EXTMIC
13 28 GND
GND
R549
14 27 GND 120k
+5V +5V
VREC
15 26
HV
GND
16 25
HV
17 BEEP
24
VORDET
18 23 MOD
R159
RFDETV
100k
GND
19 22
LIGHT
VORON
GND
20 21
RSSI
LIGHT
S2
S1
JPM1990-2711R
JPM1990-2711R
LEFT SIDE
11 - 2
RX: 0.0V
RX: 0.0V
TX: 3.5V
TX: 4.9V
C44
0.001
R39 R34
10k 10k
C402
L13
0.001
D5 R31 0.1 H
C45
D6 R37 33k
T+5 1SV246
0.001 C42 R33
MA77 470
0.001
220
C48
C49 0.001
C41
2.2 R38 R36
0.001
100 100 L14
4.7 H
R32
100
C46 R35
C47
0.001 10k
0.001 C43
39p
RX: 1.2V RX: 4.2V RX: 1.2V
TX: 0.0V TX: 0.0V TX: 0.0V
R5
C107 C106
R98 R95 RX: 4.8V R93 R85 R84
0.1 R90 R88 0.01
150k 180k TX: 0.0V 2.2k 4.7k 100k 4.7k 100k
D18 R99
MA111 220k R92 C108
56k 0.01 R87
C111 68k
Q18 C102
0.01
0.47
RX: 1.4V
R100 2SC4211 C104
100k TX: 0.0V Q16 0.01
Q17 2SC4215
2SC4215
Q15
R96
R101 2SC4215
R97 56k R94 R91 R89
330k C114 C101
4.7k C112 100 C109 2.2k 470k
0.001
0.01 0.1 470p
R86
C103
2.2k
0.1
IC13
VORDET RX: 0.2V
C117 NJM2107F R153
TX: 0.0V
0.1 1M
5 1
RSSI 4
3 RX: 0.2V
C118 C116 TX: 0.0V
2
100p
0.22
RX: 2.5V
TX: 0.0V
R155 R154
D100
1M 1.5M
MA8024
C180
L42
0.001 R138 R137 C199 C177
4.7 H
68p
470k 47k 15p
16 15 14 13 12 11 10 9
C175
D26
33p
C178 HVU17
C179
0.01 X2
0.1
29.600MHz
IC4
M62354GP
IC3
TB31207AFN
C198
R158
16 2p
1 2 3 4 5 6 7 8 1 22k
FIN1 CP1
2 15
GND VCC
3 14
CLK XIN
4 13
DATA XOUT
5 12
STB BO
6 11
BS1 LD
7 10
BS2 GND
8 9
SDATA
FIN2 CP2
UNLK
WXC
AFC
HV
EMBI
CHGC
SBATT
VCC
+5V
C597
0.01
BEEP
IC510
R550
TC75W51FU
100k
1
8
2
7
3
MOD 6
4
5
C595
R553
R551 R556 0.01
100k 100k
47k
R555
C594
47k
0.0027
R554
500k
VOLCK
VOLDATA
JACKDET
EXTMIC
EXTPTT
C540
VREC
4.7
PTT
R163
100k
R162
100k
RX: 0.0V C33
R20 R17 L9
TX: 3.2V 0.001 C26
12k
56 EXCCL3225U 0.1
R27
R30
1k
220
R19 C32
C29 L10 C31
R22 L12 10k 0.001 R18
D4 0.001 0.001
2.2k 80nH 33 39nH
1SV246
R29 C30
15k
C36 39p
L11
C35
0.001
33p 68nH
C40 Q4
8p
Q6 2SC3357 Q3
R25 R21
2SC4403 RX: 0.0V C34 2SK2973
1k
TX: 3.2V 1k 39p
R28
Q5 MP2
100
2SC4211
C39
0.001
R26 R23
R24
100k C38 C37 10k
10k
0.001
10
X1
R77 R71
C97
6.8k CDBCA450CX24 1.2k
0.01
R80
R74
56k
100k C201 C91 C88
R75 22p 0.01
68p
R69
1k
R79 R76 IC1 3.3k
Q14 C99
390k 10k
2SD1819 10 TA31136FN C90
R68
0.01 560k
1 16
FI2 OSCIN MIXIN
R82 2 15
CFWC450E
OSCOUT GND
18k 2 1 3 14
MIXOUT N-REC
4 13
C100 VCC N-DET
5 12
0.01 IFIN RSSI
4 3 6 11 Q13
RX: 0.1V
DEC IFOUT
7 10 2SC4215
R83 TX: 0.0V
R81 FILOUT QUAD
470k 8 9
1.5k
FILIN AFOUT
C98 C96
0.001 0.1 C94
R73 R72
0.01 R70
100k 470 C89
2.2k
0.01
C87
C92 47p
C95 C93
C301
0.01 0.001 0.001
9p
C303
24p
L300 L44
L301
6.8 H
C304 0.22 H C302 0.22 H C300
82p
68k 150p
+5V
Q33
C174 R130 C172
R133
0.001 2.2k 2SC4116 0.001
100k W17
R131 C159
C173 L40
10k 0.001
15 LB-342
D25
MA77
Q34
C170 C200 C167 C166
0.001 0.001 0.001
UN9210 82p R127
C163 C161
EP1 6.8k
L41 2p 0.001
R134
2.2k 0.82 H
R129
R135 6.8k
C165
R128
1k
15p 220 C160
C168 0.001
D24 C162
Q32
0.1 C164 2p
MA304
C169 2p 2SC4226
1
CP1
5.0V
W15
1.2V C537
Q36
0.001
XP1501
R149
10k 5
C541 1
4.7 8 7 6 5
2
3 4
C187
R150
IC505 C188 0.001
100k
4.7
M62429FP
R145
R557 R148 R147
C596 C186 10k C184
39k 1k 12k
150p 0.001 100
1 2 3 4
C539 R300
0.1 1k
C202
1 R146
C185
10k 4.7
R301
C538
0.1 820
R160
47k
R161
5
3 270k
4 RF UNIT
1
IC14
2
NJM2107F
VCC
R11
R14
22k
22k
L7 3 2 1
C25 C24
R16 R15
36nH R13 R12
50k 33 0.001 0.001 C23
47k Q1 R9
68k 0.001
UMS1 47k
4 5
C19
L8 W12 L6
27nH 19.5nH 0.001
C22 C21
R8
82p
27p
Q2 270
C27 2SK2974
56p
R10
C20
10k
0.001
R78
150k
C83 C82
0.001 0.001
R55
RX: 4.4V
270k
TX: 0.0V
R64
100 R56
R62 TBPS1R154K475H5Q
C84 470k
L24 R57
0.001 R66 C85 R59
2.2 H 220k
1.8k 10p 1M
FI1
30.050 MHz
C78
R61 C74
47p
0.5p
10k
Q12
R156 C61
1.2k 3SK151
0.001
C80 C77 L23 C73
0.001 D16 1.5p 68nH D15
2p
MA304 MA304
R60
C81 100k
R65 R63
270p C79
56 220k C75
82p 33p
L43 C204
33p
2.7 H
D17
C76
MA77
RX: 0.2V 5p
R58 R54
TX: 0.0V 220k 220k
C205
C206 3p C203
18p 15p
C193
0.001
+5V
R125 R119
100 470
R123 R114 R112
470 270 150
C153
R126 R121
R120
220 0.001
470 56k
C152 C149
C157 L39
R124 R115 L38 R113
0.001 0.001 0.001
68k 82nH C156 47k 0.27 H
27k
0.001
Q29 C154 R117
0.001 220
C158 C150
2SC4403
0.5p 8p
Q31 Q30 R118
C155 R116 C151 Q28
15 1.5k 0.001
2SC4226 2SC4226 33p
2SC4403
HV
EMBI
CHGC
SBATT
VCC
Q35
C195
2SB1201
100
IC6
RX: 9.2V TA7368F
TX: 9.1V
R110
1 10
1k
NC POUT
2 9
VCC PWGND
3 8 C340
Q26
NC PREGND R139 100
4 7
10 UN9211
VIN PHASE
C196 5 6
0.001 RIPPLE NF
R109
R140
C181 C140
10k
180
0.1 0.001
C182
C183 22p
R141
4.7
10k
STDET STDET
EXTMIC
EXTMIC
EXTPTT
EXTSP
EXTPTT
RX: 0.0V
R3
R2 TX: 1.8V
100k
100
R6 R5 R4
C18 C17
33k 33k 100k
0.001 0.1 C9
L4 0.001
0.82 H
C28
0.001
ANTENNA
C10 C8 L3 L2 L1
L5 0.001 0.001 65nH
65nH 50nH
60nH
C15 C11 C4
D1 2
C6 7p
1p 1p MA77
R7 3p
C14 C13
270
15p
15p
CHASSIS UNIT
C5
C7 C3
D2
C16 C12 18p 27p 22p
D3
1p MA728
MA728 0.5p
L15 L16 C56
54nH 50nH 0.001
C53 D8 C54 D9 C55
22p MA77 39p MA77
18p
R46 RX: 1.2V
RX: 4.8V
TX: 0.0V
TX: 0.0V 150k
R49
47
C64
0.47
C66
C110 C69 L21
3p
0.1 0.001 68nH R44
Q10
150k
Q11 2SD1819A
C70 C67 C62
3SK230
0.5p 0.001
0.001
L22 R47 W14
R52
D14 100k D13
82nH C58
MA304 220k
MA304 7p
R45
C65
C71 0.001 R48 47k
L18
82p C68 R51 560k
47 C60 56nH
0.001
150p
C72 R43
5p R53 220k
220k
RX: 0.0V
TX: 0.0V
C190
C192
C191
0.001
0.001 0.001
DCIN 9 — 12V
J1
HV
VCC
C120 D19
L25
0.001
C171 RB060L-40 C119 EXCCL3225U
C121 0.001
0.001
9.3V
10
Q22
R103
2SB1132
22
HV
L37
0.27 H C124 R104
0.001 22
C148
C123
47p D21 C122 D20
MA133 0.001 0.001 SB07-03C
Q27
HV
2SC4403
R111
CHGC
10k
Q23
R105
D22
10k
MA2S728 UN9210 Q24
HAT1024R
VCC
1 8
S1 D1
9.6V 2
7
G1 D1
3 6
C125
S2 D2
HV 4 0.001
5
HV G2 D2
C126
CHGC C128 C127 0.01 L26
R106
0.001
SBATT 0.001 HF50ACC BP-200L
100k
453215P-T
VCC (9V~9.6V)
CHG
1
RX: 9.3V SBATT
2
TX: 9.0V
3
RX: 2.1V
Q25
TX: 9.0V
R108 MP1
2SB1132
L28
18
C129 EXCCL3225U
0.01
D23 D27
MA133 C130 MA111
100
R107
150
C567
C572 0.001
J4 P1
12p
1 1
RX: 8.7V
2 2
TX: 8.3V
C565
0.001
L29
2.2 H
L31 2.2 H
L35 EXCCL3225U
L33 2.2 H
L34 2.2 H
L32 2.2 H
SPE/MICE
W16
C146 C142 C144 C143 C145 C141
L36 EXT SP/MIC
0.001 0.001 0.001 0.001 0.001
0.001
2.2 H
(4pin/d=3.5)
RIGHT SIDE
J1
1
INPUT: 9.6V
SP1
J2