Icom IC-756proIII Service Manual page 76

• MAIN UNIT (TOP VIEW)
J 771 150
2 30
145
140
135
1 29
to PA unit J3
130
125
120
115
110
2 1
J352 105
100
to DISPLA Y
board J451
95
J641
4 ETE
90
ET14
ETS T
1 ETKY
85
to EXT
TUNE R
80
J201
30 GND GND 29
DTIF DRI F
75
GND D5 VA
GND D5 VA
GND D5 VA
70
GND DMA F
GND GND
AG C DT AF
65
GND DRA F
- 8V GND
GND
- 8V
60
- 5V GND
- 5V GND
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 1 0 15
8 - 5
P701
3LO
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
P1851
T/R2IF
21
J811
22
to RF-B unit J451
from PLL unit J701
1 5
5
8
1 4
8 5
1 4
8 1
1 8
4 5
1 16
9 1 6
8
9
5 4
8 1 9 8
8 1 1
8
16 1
4 5
9 10
9 8
16 1
1
7
1
7
8 5
1
1 4
20
80 85 90 95 100 105 110 115 120 125 130 135 140
Ho ri z ontal
J741 J841
from RF-B unit J185
22 14V 15
21
14V
8 2 14V
NC
J3502 T8V
NC
1 5V
5V
NC
- 8V
NC
FO RV
REFV
ANTS
DRE S
GND
IST A
IKEY
16
GND
FSTB
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
102
103
5 4
128 1
8 1
87 86
128 65
14
1 20 1 64
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 D1 0
D4 D1 1
D3 D1 2
D2 D1 3
D1 D1 4
to MEMOR Y
D0 D1 5
board J2
GND GND
GND GND
2
HWR GND
to PLL unit J1
RD GND
RD GND
CS s GND
15 CS f GND 16
J202
1 A GRS 3R3V_d 2
GND 3R3V_d
M5V_d GND
GND NSQO
DSDR DPGI
NC MODS
NC FMNS
MCK CALS
DSFW AC KS
MD AT DSRS
DSFR AM S
CTFL TXS
RT DT 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
TM D
PWRK
GND
GND
GND
GND
MICI
8V
MSND
MICE
NC
SQSS
23 NC
NC 24
to DISPLA Y
board J321
J891
24 NC
NC 23
14V
14V
14V
NC
NC
NC
- 8V
- 8V
NC
GND
GND
GND
GND
YSYN C
HSYN C
B
G
R
YO BI
DRE S
LMFD
2
LFM D 1
to DISPLA Y
board J301
J3503
30
1 A9 A18
A8 A17
A7 A16
A6 A15
A5 A14
A4 A13
A3 A12
A2 A11
A1 A10s
A0 A10f
GND GND
RESET GND
BYTE GND
VC C GND
15 VC C GND 16
to MEMOR Y
board J1