Icom IC-A25N Service Manual page 88

• MAIN-1 UNIT (4/4)
HV
VCC
+5V
+3V
L1SS400
D78
Explanatory notes
TX Line
RX Line
Voltage Line
MOD
3.3 V
5.0 V
L1SS400
D83
+5V
IC238
R604
1 5
VIN VOUT
2
0 VSS
3 4
ON/OFF NC
S-1200B33
HV
R192
470k
3.0 V
5.0 V
EP20
BLM15BD102SN1
EP21
BLM15BD102SN1
R473
100k
RSTN
VIN1
AK2330P7 VOUT1
IC220 VOUT0
VIN0
VIN7
When charging
Power ON: 10.6 V
Power OFF: 9.5 V
XC9263B75DER
IC234
6 1
VIN Lx
5 2
EN/SS GND
4 3
PG FB
C574
68P
IC239
1
CTRL VIN
2
GND
R679
3
NC VOUT
2.7k
NJM2830U1
Q238
LDTC144EE
3.3 V
6
5
Q223
10.5 V 4
RSQ035P03TR
TPCF8107 TPCF8107
100k
Q213 Q212
VCC
R521
Q224
LDTC144EE
D67
L1SS400
LDTC144EE
Q218
PCON PCON
9-12
3.0 V
5.0 V
EP19
BLM15BD102SN1
EP18
BLM15BD102SN1
R469
100k
R562
T4 0
T3
0
R561
R575 R588
2SB1201
1.8 1.8
Q234
R573 1.8
R574 1.8
D87
D88
0.1
L1SS400 L1SS400
C651
D81
D80
L1SS400 L1SS400
5
R578
Q235
10k
4
R580 1k 2SC4081
10k
R585
Q240
10k
R609
LDTC144EE
0.1
1k R590
C650 LDTC144EE
1k R591
1
2
3
MPZ2012S221A EP4
BLM15BD102SN1 EP31
VIN
BLM15BD102SN1 EP28
MPZ2012S221A EP29
MPZ2012S221A
EP3
0 EP15
R434 MPZ2012S221A
*Refer to the PARTS LIST for the value and name of component.
VCC
+5V
+3V
+3V
PSTB
PSTB
PDATA
PDATA
PCK
PCK
UNLK
UNLK
2LOC
2LOC
FC
FC
LVIN
LVIN
MOD
NARROW2
NARROW2
POW
POW
R5C
R5C
RFDETV
RFDETV
TXC
TXC
PATMP
PATMP
When charging
3.5 V
AFDET
AFDET
AGCOFF
AGCOFF
ANLC
ANLC
When charging DETMUTE
DETMUTE
3.4 V
IFGAIN
IFGAIN
NOISE
NOISE
RSSI
RSSI
Q220
T1
T1
T2
T2
T3
T3
T4
T4
VORDET
VORDET
VCCBT VORON
VORON
WXC
WXC
T
3699
8 7
6 5
4 3
D
2 1
MP5
GNDBT
J1