Icom IC-756PRO III Service Manual page 89

A
CTRL-A UNIT
B
C
D
E
F
G
5V
H
J14 REF
R13
1k
AN1
I
R14
1k
AN0
J
2 1
D3
1SS319
3 4
-8V
K
5V
L
R142
4 47
M 6
5
IC2b
TC74ACT32F
IC2c
TC74ACT32F R146
12
11
9 47
13 8
10
IC2d
TC74ACT32F
R144
14
1 47
3
N
2
IC2a
7
TC74ACT32F
5V
O
R34
5.6k
R33
R31
5.6k
2.2k
14
C27 R32
1 2 3 4 9 8 13 12
0.0047 100k
7
IC14a IC14b IC14d IC14f
R51
TC74AC04F TC74AC04F TC74AC04F TC74AC04F
6.8k
P
R50
R47
R48
6.8k
1k
10k
14V
Q
C39 R49
TRC
0.0047 100k
R
Q14
DTC114EU
S
Q15
DTA114EU
14V
Q16
DTC114EU
T
Q17
DTA114EU
R90
220k
R89
2.2M
R92
4
R84 R86
2 1k
10k 180k - 1
3
U +
8
IC9a
NJM2903M
V
W
14V
REF
FOR
L2
10µH
5V
5V
IC6
HN58X2416TI
L3
1
100µH
-8V 2
3
4
L5
10µH
5V
R26 C24
47 220p
12 7
2K 2Q
R28
13
3.3k
2CK
D6
HSM88AS
11 9
2J 2Q
IC3b
TC74AC112F
D7
R27 C25
HSM88AS
47 220p
2 6
1K 1Q
1
1CK
3 5
1J 1Q
IC3a
TC74AC112F
5V
R35
82k
a
5V
IC4b 5V
R37 R38
NJM4558M
5 10k 10k
+ 7 AN3
6
-
R36 1.5M
5V
R52
100k
e
IC4a
R54 R55
8 NJM4558M
c
3 10k 10k
+ 1
2
- 1 2
b
4
4 3
R53
1.5M
14V REF
TRC FOR
-8V
THRU
14V 14V
TUNER ON: 4.4V
OFF: 0V
THRU
FOR
L25
100µH
5V
6
- 7
5
+ IC9b
NJM2903M
d
L13 100µH
Q211
DTC114EU
Q213
DTC114EU
Explanatory notes
Q215
VOLTAGE LINE DTC114EU
Q217
DTC114EU
C46 L10
0.1 100µH
8
A0 VCC
7
A1 WP
6
A2 SCL
5 49
VSS SDA P37/RD
50
P36/WR
51
P35/SYNC
52
W3 P34
53
P33/RESETOUT
54
P32/ONW
55
P31/DA2
56
P30/DA1
IC5
57
M38022M2-138FP
VCC
58
VREF
59
AV88
60
P67/AN7
61
P66/AN6
62
P65/AN5
63
P64/AN4
64
P63/AN3
R61 100k
R62 100k
R63 100k
4.6V
R64 100k
J12
ISET
0.65V
0.75V
-7.6V
13.0V
IC11
CD74HC4094M
1 16
STROBE VCC
2 15
DATA OE
3 14
CP Q4
4 13
Q0 Q5
5 12
Q1 Q6
6 11
Q2 Q7
7 10
Q3 QS2
8 9
GND QS1
Q26
DTC114EU
Q27
DTA114EU
Q212
DTC114EU
Q214
DTC114EU
Q216
DTC114EU
Q218
DTC114EU
4 3 4 3 4 3 4 3
1 2 1 2 1 2 1 2
0.16µS
32 4M
P20/D80
31 7M
P21/D81
30 10M
P22/D82 5.0V
29 14M
P23/D83
28 18M
P24/D84
27 24M
P25/D85
26 VHF
P26/D86
25 NVHF TRC
P27/D87
24
VSS
23
XOUT
7.7V
22
XIN
Q23
21
DTC114EU
P40/INT4 X1 L32
20
P41/INT0 CR-569 EXC-ELDR25C
19
RESET
18
CNV66
17 THRU Q24
P42/INT1
DTA114EU
4.6V
R106 1k
R105 1k
R71 1k
4.6V
IC13
D13
R11 0 TA7805F
MA114
O I
G
IC10
TC4S69F
R67 R102
1k 5 12k
4 2
3 D11 R65
RD5.1M 1k
CP1 CP2 CP3
R124 220
R123 220
R125 220
CP6 CP7 CP8 CP9
R122 220
R98 1k
R99 10k
CP10
L31
CP11
EXC-ELDR25C
L30
EXC-ELDR25C
L33
100µH
IC12
TD62783AF
1 18
IN1 O1 CP14 CP15 CP16 CP17 CP18 CP19 CP20 CP21
2 17
IN2 O2
3 16 R133 10
IN3 O3
4 15 R132 10
IN4 O4
5 14 R131 10
IN5 O5
6 13 R130 10
IN6 O6
7 12 R128 10
IN7 O7
8 11 R127 10
IN8 O8
9 10 R126 10
VS GND
R129 10
C89 0.0047
C90 10
L34
100µH
10 - 6
MF1
(TUNER)
MP28GA
J10 P1
T14V
PW
PX
PY
PZ
MF2
(TUNER)
MP28GA
J11 P2
T14V
AW
AX
AY
AZ
CP12
CP5
CP4
L35
HF50ACC322513-B
J7
CMCK
CMDT
FSTB
GNDL
IKEY
ISTA
GNDL
DRES
ANTS
REFV
from
FORV
MAIN-A
GND
unit
-8V
J741
GND
L36 5V
HF50ACC322513-B
5V
GND
T8V
GND
14V
CP13
L29
14V
EXC-ELDR25C
14V
J13
GND
GND
L8S
L7S
from
L3S
FILTER-A
L6S
unit
L5S
J3
L1S
L2S
L4S