Icom IC-756PROIII Service Manual page 107

A
MAIN-A UNIT (2)
B
C
D
E
F
G
H
I
J
K
L
M
N
ASL
103
AVCC
104
VREF
SCPL_ 105
P40/AN0
VOXL_
106
P41/AN1
AVXL_ 107
P42/AN2
ASO0 108
P43/AN3
ASO1 109
P44/AN4
ASO2 110
P45/AN5
STON_ 111
P46/AN6/DA0
BEEP_ 112
O P47/AN7/DA1
113
AVSS
114
VSS
SENI 115
P17/PO15/TIOCB2
P IC3501
PWRS_ 116
Q P16/PO14/TIOCA2 HD64F2357F20
CCS 117
P15/PO13/TIOCB1
CWR 118
P14/PO12/TIOCA1
ECS 119
P13/PO11/TIOCD0
IDTI 120
P12/PO10/TIOCC0
IDTO 121
P11/PO9/TIOCB0
ICK 122
P10/PO8/TIOCA0
123
MD0
124
MD1
FZMD 125
R MD2
TRAS 126
S PG0/CAS
CS3 127
PG1/CS3
CS2 128
PG2/CS2
CS1
CS0
R3531 220k
R3532 220k
R3533 220k
R3534 220k
R3535 220k
R3536 220k
R3537 220k
R3538 220k
R3539 220k
R3540 220k
R3541 220k
T
U
V
IC3503
CAT25C32SI
IDTO 5
SI VSS
ICK 6
SCK WP
7
HOLD SO
8
VCC CS
IDTI
ECS
CCS
IC3504
RTC-4553A
1
GND TPOUT
CWR 2
WR SOUT
3
IC3502
SIN CS1
S-80942CNMC-G9C
4
SCK CS0
1 5 5
W OUT CD L1
2 6
X VDD L2
3 4 7
VSS NC L3 VDD
Y
Z
AA
M5V
14V
8V
M5V_
H5V_
3R3V_d
RXF
DRES_
C3501
12p
C3502
12p
MDAT
MCK
64 MDAT
P35/SCK1
63 MCK
P34/SCK0
62 FZRX
P33/RXD1
61 CRXD
P32/RXD0
60 FZTX
P31/TXD1
59 CTXD
P30/TXD0
58
VCC
57 DB15
PD7/D15
56 DB14
PD6/D14
55 DB13
PD5/D13
54 DB12
PD4/D12
53
VSS
52 DB11
PD3/D11
51 DB10
PD2/D10
50 DB9
PD1/D9
49 DB8
PD0/D8
48 DB7
PE7/D7
47 DB6
PE6/D6
46 DB5
PE5/D5
45 DB4
PE4/D4
44
VSS
43 DB3
PE3/D3
42 DB2
PE2/D2
41 DB1
PE1/D1
40 DB0
PE0/D0
39
VCC
FRMD
CBSY
MR
R3542 220k
R3543 220k
R3544 220k
R3545 220k
R3546 220k
R3547 220k
R3548 220k
R3549 220k
L3604
RCR-875D-472K
4
3
2 IC3553
LH61665AS-60A
1
1 44
R3508
VCC VSS
MD0 2 43 MD15
47k
I/O1 I/O16
MD1 3 42 MD14
I/O2 I/O15
MD2 4 41 MD13
I/O3 I/O14
MD3 5 40 MD12
R3783
I/O4 I/O13
MD4 6 39 MD11
47k
I/O5 I/O12
14 MD5 7 38 MD10
I/O6 I/O11
13 MD6 8 37
I/O7 I/O10
12 MD7 9 36
I/O8 I/O9
11 10 35
NC NC
10
L5
9
L4
8 13 32
VCC VSS
Q3504
UCAS 14 31 LCAS
2SA1576 UW CAS
WE 15 30
LW OE
RAS 16 29
RAS NC
MA0 17 28
A0 NC
MA1 18 27
A1 NC
MA2 19 26
A2 A7
MA3 20 25
Q3505
A3 A6
R3510
DTC144EE MA4 21 24
10k A4 A5
22 23
VCC VSS
IC3752
BU4094BCFV
16
MSTB 1 4
STR Q1
MDAT 2 5
D Q2
MCK 3 6
CLK Q3
15 7
OE Q4
14
Q5
13
Q6
12
Q7
11
Q8
9
QS
10
QS
8
MR
IC3753
BU4094BCFV
16
1 4
STR Q1
2 5
D Q2
3 6
CLK Q3
15 7
OE Q4
14
Q5
13
Q6
12
Q7
11
Q8
9
QS
10
QS
8
33
COREVDD
MA3 34
MA3
MA4 35
MA4
MA2 36
MA2
MA5 37
MA5
MA1 38
MA1
MA6 39
MA6
MA0 40
MA0
MA7 41
MA7
42
MA10
43
MA8
44
MA11
45
MA9
46
IOVDD
RAS 47
RAS
WE 48
WE IC3551
UCAS 49
UCAS S1D13504F00A000
LCAS 50
LCAS
51
VSS
MD7 52
MD7
MD8 53
MD8
MD6 54
MD6
MD9 55
MD9
MD5 56
MD5
MD10 57
MD10
MD9 MD4 58
MD4
MD8 MD11 59
MD11
MD3 60
MD3
MD12 61
MD12
MD2 62
MD2
MD13 63
MD13
MD1 64
MD1
MA7
MA6
MA5
MSTB
BYTE
NBS
R3753 1k MSL1
R3754 1k MSL2 J3503
R3755 1k MISL A9
R3756 1k MOSL A8
R3757 470k VOSL A7
R3758 1k AGRS A6
A5
D3750
A4
MA2S111
A3
A2
A1
A0
RESET
R3761 100 AMS
R3762 1k PHFS 8V
R3763 1k P50S
R3764 100 MODS R3745 22k
R3740
R3765 1k FMNS
150
R3766 1k ACKS IC3751
R3767 1k CALS M62352GP
R3768 1k DSRS 11
VCC
12
AO11 AO10
AFG2V 13
AO12
14
DO
ASTB 15
LD
MCK 16
CLK
MDAT 17
DI
BLAV 18
AO1
BLBV 19
AO2
20
GND
CIVE
CIV
RESET
M5V_
D3771
DAN222
R3776
Q3771
33k
2SA1576
128 A3 Q3772
AB3
2SC4081
127 A4
AB4
126 A5
AB5
125 A6
AB6
R3778
124 A7
AB7 47k
123 A8
AB8
122
AB9
121 A9 IC3771
AB10
120 A10 TC7W04FU
AB11
119 A11
AB12
4 5
118 A12 CBSY
AB13
117 A13
AB14
116 A14 CTXD 3 6
AB15
115 A15
AB16
2 7
114 A16 CRXD
AB17
113
AB18
1
112 DRES_ 8
AB19
111
AB20
110
IOVDD
R3780
109
VSS 1k
108
BUSCLK
107 IC3552
TESTEN
106 TC7WU04FU
SUSPEND
105
CLKI
5 4
104
VSS
103
VRTC
102 6 3
HRTC
101
DACRS1
7 2
100
DACRS0
R3559
99
DACWR 39
1
98 8
DACPO
97
COREVDD
R3551 1M
X3551
CSTCV26.00MXJ040
3R3V_d
W3551
10 - 10
A
M5V
B
C
14V
D
8V
E
M5V_
F
H5V_
G
H
RXF
I
J
K
L
M
N
O
A18
A17
A16
A15
A14
A13
A12
A11
A10
NBLV
P
8V
Q
R
10
VDD
9 VOGV
8 SATV
AO9
7 BANV
AO8
6 DRIV
AO7
5 POCV
AO6
4 MIGV
AO5
3 AFG1V R3742 22k AFGV
AO4
2 MONV
AO3
1
VSS
R3743
100k
S
T
Explanatory notes
VOLTAGE LINE
U
38nS
230mV
25mV
0V
V
W