CP50 Manual -- 6804370J15 -- Available from APD (America's Parts Division, 1-800-422-4210)
AP50 Manual -- 6804370J03 -- Available from APD (America's Parts Division, 1-800-422-4210)
AP Series RSS -- PMVN4006C -- Not available in U.S. Good only for setting power, deviation, etc. Won't change frequency range.
Full details in CP50 manual (6804370J15), page 4-1. Removal of R417 (51K - left of microprocessor and above surface mount crystal, empty pad next to it) allows transmit on other than ham sections of band (for AP series). Puts CP series into "dealer set-up mode" and allows freq, pl, etc change via front panel.