Icom IC-756PRO III Service Manual page 76

• MAIN UNIT (TOP VIEW)
J771 150
2 30
145
140
135
1 29
to PA unit J3
130
125
120
115
110
2 1
J352
105
100
to DISPLAY
board J451
95
J641
4 ETE
90
ET14
ETST
1 ETKY
85
to EXT
TUNER
80
J201
30 GND GND 29
DTIF DRIF
75
GND D5VA
GND D5VA
GND D5VA
70
GND DMAF
GND GND
AGC DTAF
65
GND DRAF
-8V GND
-8V GND
60
-5V GND
GND
-5V
8V FMTL
55
8V GND
2 1
to DSP-A
board J2001
50
45
40
35
30
25
20
15
10
5
0
0 5 10 15
8 - 5
P701
3LO
from PLL unit J701
8 5
1 4
8 5
14 8
1 4
1 7
MP11
10
11
20 25 30 35 40 45 50 55 60 65 70 75 80
P1851
T/R2IF
21
J811
22
to RF-B unit J451
1 5
5
8
1 4
8 5
1 4
8 1
1 8
4 5
1 16
9 16
8
9
5 4
8 1 8
9
8 1
1 8 102
4 5 16 1
9 10
8
9
16 1
1
7
1
7
8 5
1
1 4
20
85 90 95 100 105 110 115 120 125 130 135 140
Horizontal
J741 J841
from RF-B unit J185
15
22 14V
14V 21
8 2 14V
NC
J3502 T8V
NC
5V
1
5V
NC
-8V
NC
FORV
REFV
ANTS
DRES
GND
ISTA
IKEY
16
GND
FSTB
to PLL unit J1
7 1 2 CMDT
CMCK 1
to optional
unit UT-102 to CTRL-A unit J7
2
8 5
1 4
65 64
37
36
103
5 4
1
128
8 1
87 86
128
65
14
1 20 64
1
8
14
10 11
8
1 20 32 33
10 11
11 10
22 1
20 1
11 10
23 44
20 1
145 150 155 160 165 170 175 180 185 190 195 200
J3504
1 D7 D8 30
1
D6 D9
D5 D10
D4 D11
D3 D12
D2 D13
D1 D14
to MEMORY
D0 D15
board J2
GND GND
GND GND
2
HWR GND
RD GND
RD GND
CSs GND
15 CSf GND 16
J202
2
1 AGRS 3R3V_d
GND 3R3V_d
M5V_d GND
GND NSQO
DSDR DPGI
NC MODS
NC FMNS
MCK CALS
DSFW ACKS
MDAT DSRS
DSFR AMS
CTFL TXS
RTDT MSL1
GND DSKY
GND GND 30
29
to DSP-A
board J2002
J861
1 14V
14V 2
14V
NC
NC
NC
NC
SPE
AFO
SPE
TMD
PWRK
GND
GND
GND
GND
MICI
8V
MSND
MICE
NC
SQSS
NC
23
NC 24
to DISPLAY
board J321
J891
24 NC
23
NC
14V
14V
14V
NC
NC
NC
-8V
-8V
NC
GND
GND
GND
GND
YSYNC
HSYNC
B
G
R
YOBI
DRES
2 LMFD
LFMD 1
to DISPLAY
board J301
J3503
1 A9 A18 30
A8 A17
A7 A16
A6 A15
A5 A14
A4 A13
A3 A12
A2 A11
A1 A10s
A0 A10f
GND GND
RESET GND
BYTE GND
VCC GND
15 VCC GND 16
to MEMORY
board J1