Anytone At-5555n: Ii Service Menu

Accessing the service menu on the Anytone AT-5555N II requires a specific sequence of button presses and menu navigation. Follow these steps:

“If you don’t own an oscilloscope, don’t touch the bias settings. Seriously. You’ll smoke your finals.” — Tech support, AnyTone forum

If successful, the display will change. Instead of showing a channel or frequency, you will likely see something like or "R-01" on the screen, or a parameter code like "POWER HI" .

Once inside:

before making any changes. Improper adjustments can cause permanent frequency drift or hardware issues. RF Gain Fix anytone at-5555n ii service menu

While the exact mapping of all 59 items can vary, user communities have identified several crucial ones. Below is a table of some known parameters.

: Turn the radio completely off using the volume/power knob.

Modifications that alter frequency ranges or power output may cause the radio to operate outside of legal parameters for amateur radio or CB use.

Always write down every value for all 50+ menu items before changing anything. If you lose your original settings without a backup, the radio may require professional realignment with a signal generator. Accessing the service menu on the Anytone AT-5555N

Guessing will make you transmit off-frequency, causing distortion and interference.

Aligns the suppressed carrier point for clear Upper Sideband (USB) and Lower Sideband (LSB) operation. Local Oscillator Calibration

: Never change these settings without professional test equipment (frequency counters, signal generators). Improper adjustments can "unalign" the radio's transmission and reception across different modes. Always write down original factory values before making any changes.

: If successful, the radio will enter the Service Mode, often starting at a specific channel setting like CH-52 (RFG) Key Menu Settings & Operations You’ll smoke your finals

: To unlock the radio (e.g., for 11m/CB bands), turn on while holding , then switch from using the channel knob and press to confirm. Google Groups

A common question is whether the radio needs alignment out of the box. The consensus is a clear "no." From almost every source reporting on these, they are "dead nuts on" and ready to go.

To see the current numerical value of a setting, press the PTT (key the mic) .

: Never adjust alignment settings without a calibrated dummy load, power meter, and frequency counter.