Hi Chaps,
In case it is a help...
This is what I did with my icom 7200
Tune on the atu button side works as does tune button on the 7000
and 7200.
best
Ian VK5IS
On 4/01/2023 11:15, Glenn wrote:
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I haven't actually done this, but looking at the schematics, 4 of
the connection points to the interface board are small pads on the
rear of the ATU-100 board.
Two are labelled 'A6 & A7'? the other two are not labelled.??
But if you check with an ohm meter, the next pad on, adjacent to
A7 pad is Pin-22 on the Atmega and the last pin is Pin-23 on
Atmega.
Thus Pin 22 is the B1-Auto on the interface and Pin 23 pad is
B2-Bypass on the interface.
ie the pads are:
The GND and +5V points can be connected to the 5v regulator
device, a TO-92 device. Check a data sheet for correct pin-out of
the 78L05.
It would appear you need two additional diodes, D4,5 to be added
to X2, along with a suitable female connector (a DIN-5 it would
appear) to connector the IC-7300 via a cable from the male DIN-5.?
$X appears to be an additonal 2.5mm (?) socket for external
ATU-100 power if required.
You should verify these connection details I have
given, before wiring it up.
Glenn
