Icom IP501M Service Manual page 42

Ip advanced radio system
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• MAIN-A UNIT (6/6)
VDD_INPUT(13.8V/26.4V)
D451
IGNITE
UDZS9.1B
L1SS400
D471
VDD3R3_02(3.3V)
Q461
LDTA144EE
Q460
LDTC144EE
VDD3R3_02 (3.3 V)
IC468
R461
1
8
EN_A
2
7
22k
3
6
4
5
R459
EN_B
SN74LVC3G14DCTR
0
Explanatory notes
Voltage Line
VDD3R3_CPU(3.3V)
Q454
LDTC144EE
D453
L1SS400
D455
L1SS400
D454
L1SS400
IC469
1
8
2
7
3
6
4
5
TC7W125FU
R462
IC478
100k
1
5
A
VCC
2
B
VDD3R3_02 (3.3 V)
3
4
GND
Y
SN74AHC1G02DCK
IC471
1
CD
VDD
2
VSS
3
MR
VOUT
IC479
1
5
NJU7704F3
2
3
4
TC7S08FU
VDD3R3_CPU(3.3V)
Q459
RUM002N02
10-8
IGS
VDD3R3_02(3.3V)
DCDC_EN
Q456
LDTA114EE
Q455
LDTC114EE
R470
FWV
0
VDD3R3(3.3V)
IC474
4
3
2
5
1
PS_HOLD
TC7S08FU
5
R466
4
2.2k
PB_ENC

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