Icom IP501M Service Manual page 39

• MAIN-A UNIT (3/6)
[D-Sub CONNECTER]
J502
R1033
D_AGND
1 2
0
3 4
5 6
7 8
9 10
11 12
13 14
15 16
EXTMOD
17 18
19 20
21 22
Q952
23
24
LDTC114YE
25 26
27 28
29 30
MICE(GND)
EXTMOD
IC506
D962 D959 C552 1
0.1 2
3
4
C553 5
DA221 DA221 0.1 6
D_RXD 7
8
D_TXD
MAX3232EIPWR
R1006
UART6_CTS
UART6_RTS
UART6_TX
UART6_RX
47k
VDD3R3(3.3V)
Q516
LDTA144EE
EXTERNAL SPEAKER
J503
1
2
3
Power supply voltage is:
13.8 V DC: 6.5 V
26.4 V DC: 6.6 V
R524 Q506
2SC4116
Q502
100k
RSR025N03
VCC(13.8V)
R526
Q507
100k
RSR025N03
R525
Q504 Q508
100k
LDTC144EE RSR025N03
Q505
Q503
LDTC144EE
LDTA144EE
VCC(13.8V)
S501
NANOSMDC016F
R999
D_TXD
D_RXD
D_RTS
D_CTS
47
DISC
Q953
DAFO
LDTC114YE
D_VCC
VDD5(5V)
EP503 R587
MMZ1608S601A 100
Q752
LDTC114EE
C754
VDD5
0.0039
R757
5.6k
5
3
VDD3R3(3.3V)
VDD5(5V) 1
2
MAIN-A UNIT (4/6)
16
C1+ VCC
15
V+ GND
14
C1- DOUT1
13
C2+ RIN1
12
C2- ROUT1
11
V- DIN1
10
DOUT2 DIN2
9
RIN2 ROUT2
C728 R721
1
R727
0
VDD8(8V)
Q522
2SC4116
R535 R572
0 0
C504 R531
1 0
R598
Q518
RSR025N03
0 R519
F_AMUT
MAIN-A UNIT (2/6)
100k
Power supply voltage is:
13.8 V DC: 13.7 V
26.4 V DC: 13.9 V
VCC(13.8V)
AUDIO AMP
IC504
5 C512 R533 R504 R503
TDA2003L 1
C510
4
1 1.8k 1.5k
2
470
3
C996 R1012
0.039 39
Q509
C997
RSR025N03
330
J501
VDD8_M(8V)
VDD5(5V)
Q753
LDTC114EE
R753
10k
Q751
LDTC114EE
R760
VDD5(5V)
1.5k
IC752
R774
4 1 14
I/O1 VDD
2 13
8.2k
O/I1 CONT1
IC751
3 12
O/I2 CONT4
NJU7056F3
4 11
I/O2 I/O4
5 10
CONT2 O/I4
6 9
CONT3 O/I3
7 8
VSS I/O3
BTMIC
TC74VHC4066AFK VDD3R3(3.3V)
VDD5(5V)
R584 R583
VDD8(8V)
0 0
Q702
2SC4116
C727
1
0
R720
DISC_MUTE MAIN-A UNIT (2/6)
100k
Q701
RSR025N03
Q519
R574
RSR025N03
100k
Q523
2SC4116
R597
0
MAIN-A UNIT (4/6) BTAF
R539
0
Q510
C513
2SC4116
22 0.22
Explanatory notes
TX Line
RX Line
Voltage Line
R537
100k
10-5
FRONT-D UNIT
VDD8(8V) VDD3R3(3.3V)
EP874
MMZ1608Y300B
VDD5(5V)
VDD5(5V)
R516
R770
47
100
MIC AMP
IC502
IC755
5 1
NJU7056F3
1 2
C764 C765 R772
4 3
3
1 1 1.8k
TC7SZ07FU
2
R769
5.6k
C763
IC503
5 1
0.0018
2
4 3
VDD5(5V) VDD3R3_CPU(3.3V)
TC7SZ07FU
5
1
4
3
IC753
2
TA75S393F
R_AMUT MAIN-A UNIT (2/6)
SCL2_5
MAIN-A UNIT (1/6)
SDA2_5
VDD5(5V)
VDD8(8V)
IC703
8 7
V+ SCL
9 6
VREF SDA
10 5
GND MUTE
C709 11 4 C713
OUT4 IN4
2.2 2.2
C710 12 3 C714
OUT3 IN3
2.2
C711 13 2 C715 2.2
OUT2 IN2
2.2 14 1 C716 2.2
C712
OUT1 IN1
2.2 2.2
NJU72342V
R541
120k
C516
150P
5
3
4
1
2
IC505
NJU7056F3
R596
LCDDT1
LCDDT
56
R595
LCDCL1
LCDCL
56
MAIN-A UNIT (2/6)
R594
LCDSB1
LCDSB
56
R592
LCDCS1
LCDCS
56
EP884
RSLCD1
RSLCD
MMZ1005Y102CT MAIN-A UNIT (1/6)
MCDET
MCDET
DLC_R
DLC_R
DLC_B
DLC_B
TLC
TLC
RLC
RLC
BLC
BLC
VDD3R3(3.3V)
MAIN-A UNIT (2/6)
PROG
PROG
SEL
SEL
FUNC
FUNC
DTM1
DTM1
VLA
VLA
VLB
VLB
EN_A
EN_A
EN_B MAIN-A UNIT (6/6)
EN_B
5
4
CLDI
MAIN-A UNIT (2/6)
CLDO
UART6_RX
UART6_RX
UART6_TX
UART6_TX
UART6_RTS
UART6_RTS
UART6_CTS
UART6_CTS
EXIO18
EXIO18
EXIO17
EXIO17
EXIO19
EXIO19
EXIO15
EXIO15
EXIO23
EXIO23
TX_AF
MAIN-A UNIT (2/6)
F_MIC
F_MIC
EXTMIC
EXTMIC
ENBTMIC
ENBTMIC
SPI
SPI
AFOF
AFOF
EXIO21
EXIO21
EXO10
EXO10
EXT24
EXT24
EXIO25
EXIO25
EMSW
BT_AF
RX_AF
MAIN-A UNIT (2/6)
AMUT
PSW
R1030
12k
R545 C519 R1031
180k 0.1 1.2k
AMUT