ICOM Service Bulletin TIPS
October 3, 2007
Model : IC-2820H/E2820 all versions
Subject : Cloning is not accepted at data terminal
The radio does not accept cloning from [DATA] on the FRONT panel through the OPC-1529 while an external speaker is being connected to [SP2].
While an external speaker is connected to [SP2], the clone terminal and GND of the speaker jack are made in connection caused on use of the same GND terminal of the speaker plug. In this condition, the transceiver turns down the transferring clone data from the connected PC.
To prevent this phenomenon, remove the external speaker plug from [SP2] while cloning from [DATA]. Or the other prevention, modify the speaker plug to replace with stereo plug.