Icom IC-A25C Service Manual

9-6
TX Line
RX Line
Voltage Line
Explanatory notes
T
VCCBT
GNDBT
D
IC240
CONTROL VIN GND VOUT NC
VIN
VSS
ON/OFFNC
VOUT
AK2330P7
IC220
VIN7
VIN0
VOUT0
VOUT1
VIN1
RSTN
CSN
SCLK
SDATA
DVDD
VSS
AVDD
VREF
VIN2
VOUT2
VOUT3
VIN3
VIN4
VOUT4
VOUT5
VIN5
VIN6
VOUT6
VOUT7
AK2330P7
IC216
VIN7
VIN0
VOUT0
VOUT1
VIN1
RSTN
CSN
SCLK
SDATA
DVDD
VSS
AVDD
VREF
VIN2
VOUT2
VOUT3
VIN3
VIN4
VOUT4
VOUT5
VIN5
VIN6
VOUT6
VOUT7
2LOC
FC
LVIN
MOD
NARROW2
POW
R5C
RFDETV
TXC
NOISE
ANLC
RSSI
IFGAIN
DETMUTE
T1
T2
AFDET
VORON
T4
AGCOFF
WXC
T3
VORDET
PATMP
+5V
0
R470
0.1
C533
100k
R469
0.1
C531
0.001
C249
10
C532
470
R468
0.001
C534
0.1
C535
470
R472
0.1
C537
10
C536
100k
R473
VCC
+3V
PSTB
PDATA
PCK
UNLK
0R524
L1SS400
D67
RSQ035P03TR
Q223
1
2
3
4
5
6
LDTC144EE
Q220
0.01
C125
10k
R504
TPCF8107
Q212
1 2 3
4 5
6 7 8
J1
0.1
C126
0.001
C431
1
C385
0.001
C573
LDTC144EE
Q218
TPCF8107
Q213
1 2 3
4 5
6 7 8
100kR521
MPZ2012S221A
EP4
68P
C574
0.1C585
0
R434
0.01C586
270k
R503
MPZ2012S221A
EP3
0.001
C418
LDTC144EE
Q224
0.1
C180
L1SS400
D30
BLM15BD102SN1
EP18
BLM15BD102SN1
EP19
BLM15BD102SN1
EP20
BLM15BD102SN1
EP21
BLM15BD102SN1 EP28
MPZ2012S221A
EP15
0.001
C602
0.001
C613
0.1
C614
0.1
C615
DAN222
D66
0R550
0R551
0R552 0R554
0R555 0R556 0R558 0R559
0
R561
0
R562
XC9263B75DER
IC234
1
Lx
2
GND
3
FB
4
PG
5
EN/SS
6
VIN
7
10C577 10C579
10
C580
LQM2MPN2R2NG0L
L100
LQM2MPN2R2NG0L
L99
NFM21PC224R1C3
C629
MPZ2012S221A
EP30
NJM2904CRB1
IC235
1 2 3 4
5 6 7 8
1k
R580
0.001
C610
S-1200B33
IC238
1
2
34
5
10
C646
L1SS400
D78
0
R604
LDTC144EE
Q238
100k
R605
2SA1588
Q239
L1SS400
D80
10k
R578
2SB1201
Q234
L1SS400
D81
100
R612
0.1
C651
0.1
C652
0.1
C176
L1SS400
D31
BLM15BD102SN1
EP31
L1SS400
D83
TPD1E10B06
D85
L1SS400
D87
L1SS400
D88
LDTC144EE
Q240
1k
R608
10k
R609
NJM2830U1
IC239
1
CTRL
2
GND
3
NC
4
VOUT
5
VIN
10k
R581
1k
R591
0.1
C650
1k
R590
10k
R610
5.6k
R572
L1SS400
D82
10 C384
RB050LA
D68
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
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
MP5
12
34
56
78
MPZ2012S221A EP29
0.001 C599
100P
C605
2SC4081
Q235
1
C653
0.001
C616
0.1
C647
0
R602
10k
R537
NJM2836DL3
1 2 3 4 5
10
C612
0
R613
180
R674
100k
R582
100k
R584
10k
R585
10k
R589
100k
R505
0.1
C712
820
R519
100k
R515
6.8k
R583
470k
R192
120k
R193
470k
R194
120k
R195
120k
R520
6.8k
R571
680
R577
680
R642
1.8
R574
1.8
R573
1.8
R575
1.8
R588
2.7k
R679
SCK
SDATA
DA2STB
SCK
SDATA
DA1STB
POW
T1
T2
T3
T4
IFGAIN
FC
2LOC
PSTB
PDATA
PCK
UNLK
R5C
WXC
ANLC
LVIN
AFDET
DETMUTE
NOISE
RSSI
VORDET
VORON
RFDETV
TXC
CHGIH
AGCOFF
PWSW
MOD90O MOD90I 2LOC FC T2 T1 IFGAIN POW
T3
T4
PATMP
VIN
VIN SBATT2
PCON
VCC
NARROW2
AFON
+5V
+5V
PCON
PCON
PCON
PWRBTN BATDATA
HV
HV
+3V
+3V
DCIN CHGC
+5V
VCC
+3V
HV
MOD
5.0 V
3.3 V
3.0 V
3.0 V
3.3 V
10.5 V
5.0 V
5.0 V
When charging
3.4 V
When charging
3.5 V
When charging
Power ON: 10.6 V
Power OFF: 9.5 V
• MAIN UNIT (4/4)
*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