[ICOM] ACC1 different in ICOMs??

[Mike]

Dave Edwards wrote:
> I give up for today.
> I can't figure this one out, I was hoping someone on the list could help.
> 
> I have a sound card interface (RigBlaster) that works on my 756Pro just 
> fine. It is connected to the ACC1 port.
> 
> I switch it over to my IC970 ACC1 port, and no audio gets in to the rig.
> Sound comes out, transmit/receive works...just no modulation.
> 
> I tried the mic gain...no effect. It is as if you flip the SEND/RECEIVE 
> to send without a microphone connected....nothing.
> 
> Another anomoly that I think is related...
> With the DIN connector plugged in to ACC1, the microphone no longer 
> works also.  Pull out the DIN plug, and the mic works fine.
> On the PRO, the mic works whether the DIN plug is in or out.
> 
> Anyone have an idea??
Different configuration of the ACC1 jack?
73, Mike NF4L