Icom IC-A24 Service Manual page 29

• LOGIC UNIT (BOTTOM VIEW)
J1
21
20 GND GND
LVIN GND
UNLK DA2STB
GND GND
C615
OE DETO
R572
INTMIC PTT
R588
C183
EXTREGC SBATT
C182
CHGVH JACKDET
CHGIH SDATA R567
CHGC SCK
HV CLONE
C180
DCIN VIN
C179
BEEP TXC
C177
PSTB DA1STB
VCC INTPTT
C623
VCC LIGHT
C175
PCK RFDETV
C602
+5V
VORON
RFSTB VORDET
1 PDATA RSSI 40
to RF unit J6
R18
C22
C6
MICE
C20 R16
INTMIC
IC3
C25 C31
C162
R589
C617
R14
Q1
R570
C169
R590
C164
C165
R591
R571 C172
C166
R145
R592 C171
D6
C173
C167
R147
C160
D5
C147
R148
D1
R154
C27
IC16
C142
C35
D10
R98 Q6
R576
R20 R155
C608
C610
C29
120
R21
R561
D18
1
C7
Q4
R565
C44 R30
8 5
R143 R586
R152
R133 R141
C161
Q5 R140
C23
IC7
R139
R36
IC2 C146
1 4
C24
90
91
C102
61
C114
IC1
C115
60
R64 1
4
C138
R67
C139
C140
R91
R1
30 31 R93 R95
R2 R94
C600
R135
R558
C150
R137 D17
C149
R153 R138 R136
C148
C620
R25
C43
R26
C110
R77 R75
R60
7 1
4 1
IC12
IC11
8 14
5 8
C108
R83
R80 R73 R84 R88
R63 R61
C112
R62
C113
8
5
5 4
R71
R69
R68 8 1
R560
R72
C125
C120
R89
9 - 2