Board Layouts; Display Board - Icom IC-756PROIII Service Manual

SECTION 8

BOARD LAYOUTS

8-1 DISPLAY BOARD

• TOP VIEW
J601
10 5VF
PITL
PB1B
PB2B
2 GND
105
100
J531
95
1 NC
2
L5V
HD
90
VD
NC
POLC
NC
85
NC
GND
NC
L5V 80
RL
GL
BL
75
VCOM
GND
NC
L/R
70
U/D
NC
NC
N/P 65
23 L18V
-15V 24
60
to LCD
55
J221
16 SPLK
50
1K 15
3K
7K
10K
45
14K
18K
21K
24K 40
28K
50K
GENK
35
FINK
MPWK
2 MPRK
GND 1
30
to TEN-KEY
board J1 25
J241 20
24 MUPK
MDNK 23
15
MWK
MCLK
TSK
XFCK
10
LOCK
PBTK
NOTK
KI4 5
5VF
KI3
LDV
0
LOCD
0 5 10 15 20 25
TXD
RXD
NOTD
PBTD
J120
GND
GND
1 RUP
GND
GND
RDN
GND
2
GND 1
GND
to TEN-KEY
GND
board J2
9 GND
to RIT board J1
1 2
NOTL 9
J801
PB1A
to PBT
PB2A to LCD
board J1
GND
GND 1
8 1
9 16
26 25
50 1
51 100
75 76
1 32
14 8
1 14
1 7
7 16 17
8
30 35 40 45 50 55 60 65 70 75 80 85 90
15
J101
J201
4 GND
2
5VF
MDN
to MAIN
GND
MUP DIAL
GND
5VF
1
GND
10
GND
16
8 - 1
1 8
4 5
5 4
8 1
1 8
4 5
95 100 105 110 115 120 125 130 135 140 145 150 155
Horizontal
1 23
J301
J802
NC 1
CFL- 2
to MODE
to LCD
board J1
2 24
J452
1 SSP
NC
3 SSPE
to CHASSIS
SP1
160 165 170 175 180 185 190 195 200 205 210 215 220
1 2
J321
to MAIN-A
unit J891
2 1
J451
1 SPE
NC
to MAIN-A
NC unit J352
4 SSP
J941
9 1
10 2
to PHONE
board J1
J921
10 GND
GND 9
GND
GND
GND
GND
GND
GND
DOT
2
DASH
1
to KEY board J1
J322
1 MICI
M8V 2
MUD
SQLS
MSND
GND
MMICE
AFO
9 NC
NC
10
to MIC board J2
225 230 235 240 245 250 255
24
to MAIN-A
unit J861
23