Write down your original values before changing anything.

The AnyTone AT5555N II service menu offers advanced users and technicians a range of settings and adjustments to customize and optimize the radio's performance. However, access to these settings requires caution and technical expertise. If you're not experienced with working with radio transceivers, it's recommended to avoid making adjustments in the service menu to prevent potential damage or performance issues. Always consult the user manual and technical documentation before attempting any adjustments.

The service menu is a powerful tool for advanced users to perform internal alignments and "fine-tune" the radio's performance without opening the case. Reviewers generally find it highly effective for correcting frequency drift and transmitter/receiver alignment , though they warn that settings vary by individual unit. How to Access the Service Menu

A high-resolution counter or a calibrated spectrum analyzer capable of reading up to 30 MHz with Hz-level accuracy.

Setting the TX power values to maximum will not turn the radio into an amplifier. It will simply saturate the circuit, cause severe splatter across adjacent channels, distort your audio, and rapidly burn out the final FETs.

Press and hold the FUNC button and the PUSH (Channel) knob simultaneously.

Within that brief two-second window, press the remaining front-panel buttons sequentially from left to right: RB , NB , SCAN , MEM , and EMG .

(RF Gain) setting in the service menu (typically around value 105) has been noted as a working fix by some operators. Precision Alignment

Controls the maximum output ceiling for sideband modes.

Accessing this menu requires a specific sequence that is not found in the standard manual. Preparation

He looked at the unit bolted beneath the dash: the Anytone AT-5555N II. It was a beauty—a 10-meter radio converted for CB use, shiny chrome faceplate reflecting the dashboard lights. He’d bought it from a guy in a truck stop parking lot in Tulsa who swore it was "peak-tuned by a wizard in El Paso." Elias had been having fun with it for a week, but tonight, the "wizard’s" work seemed to have backfired.

: Aligns the radio perfectly on frequency for AM, FM, and especially SSB (Single Sideband), where even 50 Hz of drift makes voices sound distorted.

: Do not change parameters to see what happens. Only adjust these values if you have verified with an external frequency counter or an accurately calibrated webSDR that your radio is transmitting off-frequency.