![background image](http://html2.mh-extra.com/html/icom/ic-m2a/ic-m2a_service-manual_4298809031.webp)
TEMPV
TEMPV
FCON
FCON
UNLK
UNLK
PLST
PLST
FCON
PCON
DAST
SQLI
SQLO
BEEP
BEPST
SCK
SDATA
MCON
BEPO
BEEP
VCC1
IN1
ENB
CLK
DATA
T1
LOK
CP1
FI1
FO1
GND1
IN2
VCC2
XB
XI
XO
GND2
CP2
FI2
FO2
OSCIN
OSCOUT
MIXOUT
VCC
IFIN
DEC
FILOUT
FILIN
MIXIN
GND
N-REC
N-DET
RSSI
IFOUT
QUAD
AFOUT
SCK
SDATA
3
4
1
1
2
3
4
5
6
7
8
VIN1
VOUT1
VPUT2
VIN2
VDD
LD
CLK
DI
VIN3
VOUT3
VOUT4
VIN4
VIN8
VOUT8
VOUT7
VIN7
GND
RESET
VDAREF
DO
VIN6
VOUT6
VOUT5
VIN5
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
16
15
14
13
12
11
10
9
1
2
3 4 5
2
5
6
8
9
10
7
18
17
20
19
16
15
13
12
11
14
R3
10 k
R4
47 k
2nd Lo
MODC
FI170
CFWM450E
C181
0.1
C179
120 P
SQLO
DAST
SCK
SDATA
DAST
SCK
SDATA
IC190
M62363FP-650C
5V
C180
120 P
R192
390
DET
DET
DET
R172
470
R176
6.8 k
R173
1.5 k
IC170
TA31136FN
C170
0.001
R174
220 k
C178
0.22
R175
47 k
R193
470
C194
0.01
C191
0.01
C192
10
R194
100 k
C193
0.01
C177
0.1
C176
0.001
C175
0.001
C3
220 P
R7
47 k
R22
560
L22
80 nH
C44
0.001
C32
1.5 P
C37
0.3 P
V5V
V5V
T5V
T5V
C65
470 P
Q53
2SK2973
L56
12 nH
Q54
2SK2974
L57
36 nH
C72
0.001
D50
MA77
R96
220 [M2A]
100 [M21]
R65
100 k
PCON
C51
22 P
C54
15 P
Q51
2SC4081 R
T5V
C58
0.1
R67
100 k
IC50
NJM2125F
R68
100
R69
15 k
1
5
2
4
3
Q52
XP6401
VCC
VCC
L51
82 nH
Q50
2SC4226 R25
R5V
R5V
Q21
2SC4226 R25
Q22
2SC4226 R25
Q23
2SC4215 O
C39
12 P
Q25
2SC4215 O
C43
22 P
C42
5 P
1st Lo
C121
0.001
L120
82 nH
L121
56 nH
C142
12 P
C140
12 P
L133
80 nH
C138
13 P
C137
2 P
D130
MA77
R131
1 k
BPFS
BPFS
V5V
R5V
Q220
2SA1588 GR
Q221
2SA1588 GR
Q222
2SA1588 GR
R222
10 k
R220
10 k
R224
10 k
R223
4.7 k
R221
4.7 k
R225
4.7 k
Q223
DTC144EUA
5V
Q225
2SB1132 Q
R227
10 k
VCC
IC220
NJM2870F05
R230
27 k
C226
0.01
CPU5V
AFV
AFV
CPU5V
1
5
4
2
3
CTRL
GND
NB
VIN
VOUT
Q224
XP6501 AB
R228
22 k
C134
1 P
C133
13 P
L130
82 nH
C131
12 P
Q90
2SC4226 R25
C104
47 P
C102
12 P
L94
80 nH
C100
12 P
D92
MA77
C99
2 P
C97
1 P
C96
12 P
L91
82 nH
C94
12 P
C92
47 P
BPFS
T5V
T5V
C108
47 P
Q24
2SC4215 O
C40
18 P
MP20
Q20
DTC144EUA
VCO CIRCUIT
MOD
PCON
MODC
PCON
MODC
PCON
R24
100 k
R25
100 k
L20
82 nH
R8
1 k
R9
10
CP1
R170
390
C159
0.01
Q151
2SC2714 Y
C156
0.001
FI151
FL-346
FI150
FL-346
R153
1.5 k
R152
1.5 k
R5V
Q150
3SK272
NOISV
MOD
5V
BEEP
VOLO
AFV
CPU5V
VOLO
AFV
CPU5V
BEEP
VOLO
AFV
CPU5V
BEPST
RSSIV
C171
82 P
R5V
R5V
5V
5V
5V
X1
CR-726
5V
IC1
UPD3140GS
C1
0.1
R1
473 k
R2
100 k
C2
0.01
D1
HVU17
C4
10 P
C7
0.01
C8
2 P
C9
2 P
C12
0.001
C5
12 P
R6
1 k
C6
0.001
R20
100
C20
0.001
C21
9 P
C10
0.047
X170
CDBCB450KCAY24
C174
0.001
R171
1.2 k
C160
0.0056
R155
1.5 k
R156
470
C155
6 P
R154
100 k
C158
0.001
C157
0.022
C153
0.001
C152
0.022
R151
3.3 k
C154
0.001
C150
0.001
R150
100
C143
0.001
R134
68
R133
10 k
C141
5 P
C139
33 P
L132
80 nH
C136
0.001
R132
10 k
C220
22
C221
0.01
C222
0.01
C223
0.01
T5VS
5VS
V5VS
R5VS
C224
22
R226
2.2 k
C225
0.22
C227
22
C228
0.001
C229
0.001
C230
10
R231
1 M
C231
1
6
1
5
2
4
3
R232
1 k
C232
0.1
R234
3.3 k
R233
2.2 k
R235
330 k
C233
0.01
R
1
R
AFVS
6
5
4
1
2
3
C135
0.001
R130
10 k
L131
82 nH
C151
56 P
R10
2.2 k
C24
0.1
C25
0.001
C27
39 P
C28
0.001
C30
0.001
C11
2.2
C22
9 P
C26
47 P
R23
1 k
D20
MA2S077
D21
MA77
C31
0.001
R29
390
R30
68 k
C36
0.001
R31
680
R32
390
C50
0.001
R53
100
R52
4.7 k
C52
0.001
R55
3.3 k
R60
1 k
R61
0.15
R62
100 k
R63
10 k
C61
33
C62
0.001
C63
470 P
C67
470 P
L55
31 nH
MP50
R75
100
R71
100
C70
91 P
C71
27 P
C68
47 P
C73
0.001
R
1
R72
47
L53
15 nH
R59
15 k
R64
10 k
C59
0.001
C60
0.001
R70
15 k
R73
1 k
R74
10 k
C66
0.001
C64
0.001
R54
33
R58
1 k
6
5
4
1
2
3
C38
0.001
R34
470
C41
0.001
R35
68 k
C122
15 P
C132
33 P
C110
0.001
C109
470 P
C105
0.001
R94
33 k
R93
1 k
D93
MA728
C103
5 P
C101
33 P
L93
80 nH
R91
1 k
R90
10 k
L92
82 nH
C95
33 P
D91
1SV307
C93
4 P
D90
1SV307
C115
0.001
[M21] only
C91
22 P
C90
33 P
C2
0.0
R115
39 [M21] only
C98
0.001
C130
5 P
C107
0.01
C106
470 P
R95
100 [M2A]
47 [M21]
C123
10 P
R121
10 k
C120
0.01
R120
2.2 k
D51
MA77
R50
1 k
R56
1.2 k
C53
0.001
C55
24 P
R66
330 k
C56
0.01
C57
0.1
R57
82
R33
39 k
R26
8.2 k
C33
220 P
R28
180
R27
8.2 k
C34
1.5 P
D22
HVU350B
D23
HVU350B
C35
0.001
R36
1 k
C29
0.001
R5
330
+
1
2
3
VCC
Q230
2SB1132 Q
AFV
Q231
XP6501 AB
5V
VOLO
VOLO
L90
44 nH
VCC
R372
100 k
R373
100 k
R374
68 k
71
k
ATIS8
ATIS7
ATIS6
ATIS5
ATIS4
ATIS3
ATIS2
ATIS1
DS360
A0153A
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
COM1
COM2
COM3
72
373
.1
C374
0.1
C375
0.1
VOLIN
NOISV
MOD
BEPST
RSSIV
VOLIN
VOLIN
VOLIN
VOLIN
VOLIN
5V
VOLO
BEEP
NOISV
RSSIV
VOLO
AFV
MOD
BEPST
VOLIN
BEPO
BEPO
DET
BEEP
NOISV
RSSIV
VOLO
AFV
MOD
BEPST
VOLIN
BEPO
DET
5V
3216
3216
C49
18 P
C48
18 P
L49
47 nH
3.6 V
RX 3.5 V
RX 1.2 V
RX 3.9 V
RX 0.7 V
RX 3.2 V
RX
0.8 V
CH16_RX 4.7 V
CH88_RX 0.0 V
5W_TX 2.4 V
1W_TX 0.5 V
Power Save OFF 5.0 V
5.0 V
AF Mute OFF
7.5 V
TX 4.9 V
RX 4.9 V
Power Save OFF 4.9 V
872 MHz
Vp-p