Icom IC-A25C Service Manual

9-4
TX Line
RX Line
Voltage Line
Explanatory notes
0.001
C405
0.1
C61
0.1
C451
0.1
C458
0.1
C459
1
C235
0.001
C395
0.1
C66
R51
270
18P
C78
L18
C2012C
0.001
C76
L22
C2012C
R43
220k
0.001
C110
0.001
C84
0.001
C392
R45
47k
R62
180k
0.001
C90
R58
220k
R380
150
R368
10k
0.001
C327
18P
C62
0.001
C75
0.001
C476
0.001
C63
R64
100
R44
82k
0.01
C82
0.001
C192
39
R379
0.15U
L25
0.01C323
3SK293
Q11
0.001
C68
0.001
C79
0.001
C67
R66
1k
0.001
C83
3P
C364
R54
220k
0.001
C65
15P
C397
0.001C81
0.001
C328
0.001
C60
0.01
C191
2P
C329
0.001
C477
1
C393
150
R378
220k
R311
1
C69
R49
47
0.01
C394
0.001
C57
0.001
C80
0.001
C193
R69
1k
0.001
C64
2.5P
C73
0.001
C58
12P
C396
0.001
C40
0.001
C38
0.001
C25
0.001
C20
1k
R21
L5
54N
470P
C17
L4
0.82U
0.001
C33
0.0022
C23
0.001
C32
0.001
C373
0.01
C28
R219
2.7
0.001
C116
0.001
C388
0.01
C31
100
R4
L46
23.5N
0.001
C372
10P
C34
47P
C350
22P
C54
R14
4.7k
47P
C429
22P
C53
0.001
C117
LMV321IDCK
IC14
1
2
3
4
5
0.001
C56
22P
C14
0.1
C24
L7
31.0N
R18
220
0.001
C352
220P
C19
L3
52.0N
0
R299
0.001
C29
R5
100k
L2
52.0N
L45
45.5N
22P
C3
82k
R338
0.001
C51
0.1
C52
R39
10k
0.001
C48
0.1
C469
0.1
C470
0.1
C471
0.1
C472
VCC
22P
C7
27P
C5
0.001
C8
0.001
C10
22P
C13
0
R397
L15
54N
0.001
C9
MPZ2012S221A
EP16
0.001
C485
0.001
C486
0.001
C487
0
R67
DMC501010
Q8
1
2
34
5
1.5k
R29
R40
15k
56P
C35
FL-439
FI3
1
IN
2
OUT
3
GND
4
GND
5 6
FL-455
FI1
1
IN
2
OUT
3
GND
4
GND
5 6
15P
C365
4P
C361
150
R352
0
R353
22k
R361
LMV321IDCK
IC25
1
2
3
4
5
22k
R363
L6
2.5N
1P
C72
R52
1k
220P
C190
68P
C296
82k
R293
R60
68k
68k
R63
R59
150k
R65
68
LQW18AN68NG00D
L97
L24
C2012C
18P
C85
3SK293
Q12
CP06S
CP501
100
R366
100
R367
7P
C86
2P
C232
2R2K
L93
2R2K
L94
2R2K
L95
2R2K
L96
RD12MVS1
Q2
1SV308
D14
1SV308
D29
1SV308
D44
RB886CS
D49
RB886CS
D51
D2
RB886CS
RB886CS
D4
D3
RB886CS
RB886CS
D5
10
C495
0.01
C118
10
C496
3.3k
R320
27k
R322
2.7k
R323
33k
R16
NTCG16
R321
NTCG16
R19
1k
R331
+3V
1SS390
D55
1SS390
D57
1SS390
D56
1SS390
D58
22
C37
2.2
C49
0.1
C50
2SB798
Q7
MT3S20P
Q4
1SV305
D50
1SV305
D15
1SV305
D16
1SV305
D13
L11
47N
56N
L12
0.3P
C375
0.3P
C11
0.3P
C15
10k
R304
R303
10k
R302
10k
15
R20
10
R23
18P
C39
82N
L56
0
R619
8.2k
R28
1SS390
D6
1SS390
D17
0.001
C648
0.001
C649
1SV307
D1
1SV307
D8
PATMP
1SV308
D86
2.2k
R638
2.2k
R617
R17
47k
1k
R22
47
R635
0.001
C660
Q13
2SC4215
100
R53
1k
R370
2.2k
R419
5.6k
R47
0.001
C432
1k
R639
0.01
C88
1
C489
10
C488
10
C481
R9
330
330
R2
4.7k
R70
22k
R652
0
R431
1M
R427
100
R426
5P
C87
12P
C71
C2012C
L69
L21
C2012C
1.5P
C74
L23
C2012C
2P
C77
3699
MP1
R13
22k
R12
2.2k
22k
R3
R11
2.2k
220P
C351
1k
R653
0.001
C676
4.7k
R607
*IC241
1 2 3
4 5
*C677
3.3k
R428
1k
R369
R68
4.7k
1
C430
4.7k
R654
470
R658
470
R41
RD01MUS2B
Q3
68P
C391
9P
C4
5P
C6
4P
C211
R10
470
R7
2.2k
R8
2.2k
2.2k
R305
PRF18
R606
0.022
C665
47
R672
4.7
C407
470
R673
R48
330k
R15
100
*L10
*L8
*C30
*R333
*R27
*R24
*R26
*R25
*C297
*C212
RFDETV
T2
T1
T4
TXC
VCC
LO
MOD
POW
POW
T3T3
TXV
IFGAIN
+3V
1st IF
• External DC power
TX: 10.2 V
RX: 0 V
• Battery pack
TX: 6.8 V
RX: 0 V
3.1 V
TX: 0 V
RX: 4.7 V
TX: 0 V
RX: 3.7 V
TX: 0 V
RX: 4.9 V
• MAIN UNIT (2/4)
*Refer to the PARTS LIST for the value and name of component.

Icom IC-A25C Specifications

General

Purpose	Aviation Service (Air Band)
Operating frequency	118.000 – 136.992 MHz
Display type	LCD
Display diagonal	2.3 \
Battery type	BP-288
Battery life (max)	10.5 h
Battery low indication	Yes
Number of batteries supported	1
Product color	Black
Operating temperature (T-T)	-10 - 60 °C
Number of batteries included	1 pc(s)
Antenna connector type	FA-B02AR

Weight and Dimensions

Depth	31.8 mm
Width	58.9 mm
Height	148.4 mm
Weight	384 g