Anytone At5555n Ii Service Menu Work May 2026

When should you use the service menu? Only in these specific scenarios:

The AnyTone AT-5555N II is a modern classic in the world of amateur radio and high-performance CB (11m) operation. It boasts a dual-core microprocessor, a full-color display, and impressive frequency stability. However, beneath its user-friendly interface lies a hidden, powerful, and potentially dangerous tool: the Service Menu. For the experienced technician, this menu is a gateway to recalibration and optimization. For the unwary, it is a path to rendering a $250 radio un-transmittable.

(Note: Exact button names may vary; consult AnyTone AT-5555N II hardware labeling. If these steps fail, the radio may require an alternate key combo or a firmware debug cable.) anytone at5555n ii service menu work

The AnyTone AT-5555N II is regarded by many as the last "real" CB radio. While its front-facing user interface offers a basic menu, the true capability of the radio lies hidden behind a key combination known to technicians but rarely explored by the average operator.

Welcome to the Service Menu. This is where the hardware meets the software, and where you can tune your rig from a "stock radio" into a precision communication device. When should you use the service menu

The AnyTone AT-5555N II includes a hidden service menu used by technicians for calibration, diagnostics, and programming checks. This article documents how to safely access the service menu, common menu items and their meanings, recommended procedures, and safety precautions. Only qualified technicians should perform service-menu operations; incorrect settings can render the radio inoperable or violate regulatory rules.

Adjust modulation/deviation:

VCO/PLL trim:

PA bias:

Honestly? Only if you have the gear.

If you don't own a frequency counter or a Bird wattmeter, do not open the service menu. Instead, send the radio to a reputable tech. The cost of calibration ($50-$80) is far less than the cost of a new AT-5555N II ($300+).

However, if you are a ham with a bench, the service menu turns the AT-5555N II from a "good off-the-shelf radio" into a precision instrument. Adjust modulation/deviation:

To save your changes and exit:

Now, test on-air. Ask for a signal report on a quiet frequency. Check your frequency against a known stable station (e.g., WWV at 10.000 MHz or 15.000 MHz).