This Table shows the ICOM hook-up points with ref. to drawings.
Radio
Model		 Schematics
ref: A
(AF o/p)		 Schematics
ref: B
(mic i/p)		 Schematics
ref: C
(PTT)		 Schematics
ref: D
(Morse Key)		 For more help
e-mail to:
 IC-22U 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-25 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-27 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-28 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-37A 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-38A 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-45 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-45 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-48 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-120 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-202 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 4 pin
pin 1
pin4 gnd		 'Mic' 4 pin
pin 2
pin4 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-215 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 4 pin
pin 1
pin4 gnd		 'Mic' 4 pin
pin 2
pin4 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-228 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-245 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 4 pin
pin 1
pin4 gnd		 'Mic' 4 pin
pin 2
pin4 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-255 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-260 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-271 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-275 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-275 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-280 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 4 pin
pin 1
pin4 gnd		 'Mic' 4 pin
pin 2
pin4 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-290 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-375 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-375 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-402 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 4 pin
pin 1
pin4 gnd		 'Mic' 4 pin
pin 2
pin4 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-471 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-475 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-490 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-502 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 4 pin
pin 1
pin4 gnd		 'Mic' 4 pin
pin 2
pin4 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-505 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-551 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-560 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-575 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-575 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-706 'Acc-1' rear
13pin Din
pin 12 o/p
pin2 gnd		 'Acc-1' rear
13pin Din
pin 11 sig
pin2 gnd		 'Acc-1' rear
13pin Din
pin 3
pin 2 gnd		 'KEY JACK'
rear panel
6.4mm jack		 Anon!
 IC-706
 MK IIG		 'Data Port'
6pin rear
pin 1 o/p
pin2 gnd		 'Data Port'
6pin rear
pin 5 o/p
pin2 gnd		 'Data Port'
6pin rear
pin 3 o/p
pin2 gnd		 'KEY JACK'
rear panel
6.4mm jack		 Anon!
 IC-707 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-707 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-718 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-718 'ACC-1' rear
pin 12
pin2 gnd
 'ACC-1' rear
pin 11
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 G6FOP
 IC-720 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-721 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-723 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-725 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-725 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-726 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-726 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-728 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-728 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-729 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-729 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-730 'Accessory'
pin 4 o/p
pin8 gnd of
24 pin skt. at back		 'Accessory'
pin 5 of
24 pin skt. at back		 'Accessory'
pin 3 of
24 pin skt. at back		 'KEY'
Unknown yet!!		 N0MEU
 IC-730 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-732 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-735 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-735 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 DL2RR
 IC-736 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-737 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-737 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-738 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-740 'Accessory'
pin 4 o/p
pin8 gnd of
24 pin skt. at back		 'Accessory'
pin 5 of
24 pin skt. at back		 'Accessory'
pin 3 of
24 pin skt. at back		 'KEY'
Unknown yet!!		 WB8ERJ
 IC-740 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 1
pin7 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-745 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-746 'Acc-1' rear
pin 5 o/p
pin2 gnd
 'Acc-1' rear
pin 4
 'Acc-2' rear
pin 6 vhf sig.
pin 3 hf sig.
pin 2 gnd		 'KEY JACK'
rear panel
6.4mm jack		 M1DGQ
or
Print Details
 IC-746 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-751 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-751 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-756 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 W9GB
 IC-756Pro 'Acc-1' rear
pin 5 o/p
pin2 gnd
 'Acc-1' rear
pin 4
rear panel		 'Acc-2' rear
pin 3 hf sig.
pin 2 gnd		 'KEY JACK'
rear panel
¼" jack		 W9GB
 IC-760 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-761 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-761 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-765 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-765 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-775DSP 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-781 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-781 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-820 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-901 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-970 'ACC-1' rear
pin 5 sig
pin2 gnd
 'ACC-1' rear
pin 4
pin2 gnd		 'ACC-1' rear
pin 3
pin2 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-1201 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-1271 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-1275 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-2400 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-2500 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-3200 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-3210 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none
 IC-3220 'Ext.Spkr'
3.5mm jack
tip  sig
 'Mic' 8 pin
pin 7
pin1 gnd		 'Mic' 8 pin
pin 5
pin6 gnd		 'KEY JACK'
rear panel
¼" jack		 none

Software for the ICOM
Bill, N3CXV has done a lot of work producing software to control these Rigs, namely the IC756 PROll, IC706 MKllG, and the R9000. This software will allow you to control your rig via;
  • CI-V interface
  • A local LAN
  • via the Internet.
 Look at http://www.n3cxv.com and get the info!