Icom Ui7 Am Fm Unit — Install

| Problem | Likely Cause | Fix | | :--- | :--- | :--- | | | OPC-2359 cable is loose or damaged | Re-seat modular plugs. Check for bent pins on 7-pin DIN. | | Loud buzzing on FM | Ground loop between UI7 and radio body | Move UI7 ground to a bare metal seat bolt. Isolate the antenna mount with a nylon washer. | | No AM stations, FM works | UI7 antenna is too short for AM BC band | Install a 31-inch whip. AM requires length, not gain. | | Stereo light is on, but no sound | 3.5mm audio cable plugged into wrong jack | Ensure it is in "EXT SP" on the control head , not the main body. | | Receive cuts out when I transmit | RF feedback from VHF antenna | Move UI7 antenna farther away. Add a snap-on ferrite choke to the OPC-2359 cable. |

In this footprint, you will see empty male pin headers protruding from the main board. These pins align exactly with the female socket layout on the underside of the UI-7 unit. Step 3: Installing the UI-7 Unit icom ui7 am fm unit install