Icom IC-756PRO Service Manual page 68

• DISPLAY BOARD (BOTTOM
J531
24
NC
23
L5V
HD
VD
NC
POLC
NC
NC
GND
NC
to LCD
L5V
RL
board
J601
GL
BL
1 5VF
VCOM
GND NOTL 2
NC PITL
L/R PB1A
U/D PB1B
NC PB2A
NC PB2B
GND
N/P
2 L18V 9 GND
−15V
1 GND 10
J221
1
SPLK
1K 2
3K
7K
10K
14K
18K
21K
24K
28K
50K
GENK
FINK
MPWK
15 MPRK
GND 16
14
to TEN-KEY
1 14
board J1
J241
1
7 8
1
MUPK
2
MDNK
MWK
MCLK
TSK
XFCK
LOCK
PBTK J120
NOTK
KI4
10
RUP
5VF
9
5VF
KI3
RDN
LDV
GND
LOCD
GND
TXD
GND
RXD
GND
NOTD
GND
PBTD
2 GND
GND
GND 1
GND
GND
GND
23 GND
GND 24 to RIT board J1
to TEN-KEY
board J2
to PBT
board J1
8 1
9 16
5 4
8 1
26 25
50 1
51 100
75 76
1 8
4 5
1 32
8
7
16 17
J101
2
J201
GND 4
MDN
MUP
5VF 1
to MAIN
DIAL
1
to MODE board J1
to MAIN unit J891
2 24
J301
1 23
1 8
4 5
16
J321
15
J452
SSP 1
to SP
NC
SSPE 3
23 1
24 2
to MAIN unit J861
8 - 3
J451
1
SPE
to MAIN
NC
NC unit J352
4
SP
2 10
J941
1 9
to PHONE
board J1
J921
1 DASH
2
DOT
GND
GND
GND
GND
GND
GND
9 GND
GND 10
to KEY
board J1
J322
10 MICI
9
M8V
MUD
SQLS
MSND
GND
MMICE
AFO
2 NC
NC 1
to MIC
board J2