[ICOM] IC-756PROIII No Transmit

[Alan Zack]

I turned on my IC-756PROIII this morning and found no transmit on any band. It has been working fine. When attempting to transmit on RTTY or CW there is no carrier, no power out shown on the Transceivers PO meter or an external meter. The red TX LED light comes on and the fan speeds up but no power out. On SSB there is no power out on voice peaks, no ALC readings but the COMP meter does show a small deflection on SSB on voice peaks. Receive is normal.

I did the CPU reset with no help.

I disconnected the 756PROIII from the power supply and antenna and connected my back up IC-746 to the same antenna and power supply connections. The IC-746 works FB telling me the power supply or antenna are not the problem.

There is no computer interfaces, etc, involved. Just the basic power supply, antenna, and speaker connections.

Does the 756PROIII suffer from the loss of power out problems that the IC-746PRO did?

Any suggestions before I box it up and send it to Icom? It was ordered on Nov 26, 2008 and shipped on Dec 2, 2008 from HRO Anaheim so is still under warranty.
_______________________________________________________
Alan Zack
Amateur Radio Station K7ACZ
Las Vegas, Nevada, USA
Delta Rocket Quality Engineer, The Boeing Company, Retired
Aviation Chief Warrant Officer,  U.S. Coast Guard, Retired