“Most ICF-121 issues aren’t hardware failures — they’re user errors. People forget that the radio has a ‘local/distance’ squelch setting. Or they don’t realize the mic hanger button mutes the speaker. The manual saves you a $100 bench fee.” — J. Harlen, retired marine electronics technician
: These are "Dealer-Programmable" and their functions (e.g., Scan, Talk Around, Power Level) will vary depending on how the unit was set up. www.tech-comm.ru Essential Technical Information No Manual Frequency Entry (VFO) icom icf121 manual
You cannot find the manual for "CS-F100" because that is the software name. The manual for the software is separate. icom icf121 manual