Icom Icf121 Manual [exclusive] -

: Push the [SCAN] key to start or stop scanning. Note that the microphone must typically be on-hook to begin scanning.

⚠️ Critical: You cannot program channels or change frequencies from the front panel using the Instruction Manual. Programming requires the optional + OPC-478/OPC-478U cloning cable + a vintage Windows PC (XP/7 32‑bit often works best). icom icf121 manual

You cannot find the manual for "CS-F100" because that is the software name. The manual for the software is separate. : Push the [SCAN] key to start or stop scanning

Usually caused by a loose programming cable or the wrong COM port selected in the software. icom icf121 manual

The physical construction of the IC-F121 emphasizes longevity and user safety.